JP2007044643A - Die coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die coating apparatus at a low cost which can evenly adjust the distribution of the discharge amount in one direction in a short time without requiring advanced skill. <P>SOLUTION: A manifold 10 extended unidirectionally, a coating solution channel 11, and a discharge port 12 are formed in this order from the upstream side to the downstream side in a die main body 4. The gap degree T2 of the discharge port 12 is selected in a range from 1.0 to 3.0 mm and the gap degree T1 of the coating solution channel 11 is equal to or larger than the gap degree T2. A choke bar main body 18 to which a plurality of split bars 17 split unidirectionally in the coating solution channel 11 are joined are installed while facing to the coating solution channel 11 and back and forth movement adjustment tools 19 are installed for the respective split bars 17. The respective split bars 17 are moved back and forth by the respective back and forth movement adjustment tools 19 to adjust the gap degree T1 of the coating solution channel 11 for the respective split bars 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a die coating apparatus that discharges a coating liquid from a discharge port extending in one direction. Specifically, even if the gap amount between the discharge port and the coating liquid flow path is increased, the discharge amount is reduced. The object is to make the distribution uniform in one direction.

  The die coating device includes a die body and a coating liquid supply device, and in the die body, a manifold extending in one direction, a coating liquid flow path, and a discharge port are formed in this order from the upstream side to the downstream side, The coating liquid pumped to the local area of the manifold by the coating liquid supply device is dispersed in one direction in the manifold, passes through the coating liquid flow path, and is discharged from the discharge port. In order to make the distribution of the discharge amount uniform in one direction in order to improve the coating accuracy, the gap amount between the coating liquid flow path and the discharge port is reduced to about 100 to 500 μm, for example, The passage resistance is made very large, the coating liquid speed from the coating liquid flow path to the discharge port is made uniform in one direction, and the gap amount of the discharge port is finely adjusted on the order of several μm. Discharge port gap adjusting means is distributed in one direction (Patent Document 1).

In the case of intermittent coating in which a coating area and a non-coating area are formed on a substrate with a die coating device, as the coating liquid supply device, a pressure feeding operation for feeding the coating liquid into the manifold, The one that alternately repeats the suction operation of sucking the coating liquid is used (Patent Document 2).
JP 2001-286806 A JP 2003-340338 A

However, the die coating apparatus has the following problems.
(1) In order to reduce the gap between the coating liquid flow path and the discharge port to about 100 to 500 μm, high accuracy is required for the processing and assembly of the die body, and the manufacturing cost is increased.

(2) In order to finely adjust the gap amount of the coating port on the order of several μm with the discharge port gap adjusting means, a long time and high skill are required.

(3) When intermittent coating is performed using the coating liquid supply device, even if the coating liquid in the manifold is sucked by the suction operation, the gap amount with a very large passage resistance of the coating liquid is about 100 to 500 μm. The coating liquid existing from the small coating liquid flow path to the discharge port cannot be sucked immediately, and the discharge from the discharge port cannot be stopped immediately, and between the coating area and the non-coating area. You can't get a clear boundary.

  Therefore, in order to solve the above problems, the present invention provides a die coating apparatus that can adjust the distribution of the discharge amount in one direction uniformly in a short time without requiring a high degree of skill compared to the conventional technique. It can be provided at a cost. Furthermore, this invention provides the die coating apparatus which can obtain a clear boundary between a coating area | region and a non-coating area | region.

  The present invention of claim 1 is used to provide a die coating apparatus capable of adjusting the distribution of the discharge amount in one direction uniformly in a short time without requiring a high degree of skill at a low cost. In the die coating apparatus in which a manifold extending in one direction, a coating liquid channel, and a discharge port are formed in this order from the upstream side to the downstream side in the die body, the gap amount of the discharge port is set to 1 Selected within the range of 0.0 to 3.0 mm, the gap amount of the coating liquid channel is equal to or greater than the gap amount of the discharge port, and is disposed facing the coating solution channel. A choke bar main body in which a plurality of divided bars divided in one direction of the liquid flow path are connected, and an advance / retreat adjustment tool provided for each division bar, and each advance / retreat adjustment tool is used to advance and retract each division bar. The gap amount of the coating liquid flow path is adjusted for each dividing bar. A die coating apparatus to be.

  In the present invention according to claim 1, the gap amount of the discharge port is selected in the range of 1.0 to 3.0 mm, and the gap amount of the coating liquid channel is equal to or more than the gap amount of the discharge port. Therefore, it is possible to make the distribution of the discharge amount uniform in one direction by finely adjusting the gap amount of the coating liquid flow path on the order of several tens of μm using a plurality of dividing bars. The processing and assembly of the main body does not require higher precision than before.

  The means adopted by the present invention according to claim 2 so as to enable intermittent coating to obtain a clear boundary between the coating region and the non-coating region includes a coating liquid supply device communicating with the manifold, 2. The die coating apparatus according to claim 1, wherein the coating liquid supply device alternately repeats a pumping operation for pumping the coating liquid into the manifold and a suction operation for sucking the coating liquid in the manifold.

  In the present invention according to claim 2, the gap amount of the discharge port is selected in the range of 1.0 to 3.0 mm, and the gap amount of the coating liquid channel is equal to or more than the gap amount of the discharge port. Therefore, during the suction operation, it is possible to immediately depressurize the coating liquid existing from the coating liquid flow path having a small passage resistance of the coating liquid to the discharge port, and to immediately stop the discharge from the discharge port. .

  Since the die coating apparatus according to the present invention according to claim 1 can finely adjust the gap amount of the coating liquid flow path on the order of several tens of μm, it is more advanced than the conventional fine adjustment on the order of several μm. The adjustment can be completed in a short time without requiring any skill. Furthermore, since the die coating apparatus according to the present invention does not require higher precision than the prior art in processing and assembling the die body, it can be provided at a lower cost than in the past.

  Since the die coating apparatus according to the second aspect of the present invention can immediately stop the discharge from the discharge port during the suction operation of the coating liquid supply apparatus, it is between the coating area and the non-coating area. Can be applied intermittently to obtain a clear boundary.

  A die coating apparatus according to the present invention (hereinafter referred to as “the present invention coating apparatus”) will be described based on an embodiment shown in the drawings.

  FIG. 1 to FIG. 9 show an embodiment of the coating apparatus of the present invention, FIG. 1 is a side view showing a coating facility provided with the coating apparatus 1 of the present invention, and FIG. 2 shows the coating apparatus 1 of the present invention. FIG. 3 is a rear view of the coating apparatus 1 of the present invention, FIG. 4 is an enlarged view of a main part of the coating apparatus 1 of the present invention, (A) is a partially sectional plan view, and (B) is FIG. 5 is a right sectional view taken along line B-B in FIG. 5A, FIG. 5 is a plan view showing a lower divided piece 7 of the die body 4 constituting the coating apparatus of the present invention, and FIG. 6 shows the coating apparatus of the present invention. FIG. 7 is a right-side cross-sectional view in which a main part of the coating apparatus 1 of the present invention is further enlarged, and FIG. 8 is an enlarged view of the dividing bar 16. It is front sectional drawing.

  As shown in FIG. 1, the coating facility is supported by a backup roll 2 and a support base 3 on which a sheet-like coated substrate W is wound and traveled, and a discharge port on the traveling coated substrate W. The coating liquid 1 discharged from the discharge port 12 of the coating apparatus 1 of the present invention is applied to the substrate to be coated W that is running. The film M is formed.

  The coating apparatus 1 of the present invention includes a die body 4 and a coating liquid supply apparatus 5, and supplies the coating liquid from the coating liquid supply apparatus 5 to the die body 4. As shown in FIGS. 1 to 3, the die body 4 includes an upper divided piece 6 and a lower divided piece 7 which are joined to each other by a plurality of bolts 27, and a plurality of bolts 28 on the divided pieces 5 and 6. The manifold 10, the coating liquid flow path 11, and the discharge port 12 extend in one direction (left and right in the illustrated case) between the upper and lower divided pieces 6 and 7. Are formed in this order from the upstream side to the downstream side. The manifold 10, the coating liquid channel 11, and the discharge port 12 are formed over the entire coating width region E. As shown in FIGS. 4 and 7, the upper and lower divided pieces 6, 7 are joined to each of the front side by a plurality of bolts (not shown) so that the lip parts 13, 14 can be separated, and between the lip parts 13, 14. A discharge port 12 is formed on the surface. As shown in FIG. 5, the manifold 10 is recessed on the mating surface 7a of the lower divided piece 7 in a coat hanger shape or the like, and has an end 21a of the coating liquid supply passage 21 in the center, and supplies the coating liquid. The coating liquid supplied from the apparatus 5 (see FIG. 1) via the coating liquid supply path 21 is dispersed in the left-right direction and sent out to the coating liquid flow path 11 in the left-right direction.

  The die body 4 has upper and lower divided pieces 6 and 7, left and right side pieces 8 and 9, and lip portions 13 and 14 formed from a material such as stainless steel. As shown in FIGS. 4 and 7, the die body 4 has a shim 15 sandwiched between upper and lower divided pieces 6 and 7, and the divided pieces 6 and 7 are joined together in a watertight manner. Thus, the upper and lower gap amounts T1 and T2 of the coating liquid flow path 11 and the discharge port 12 can be adjusted. The die body 4 selects the gap amount T2 of the discharge port 12 in the range of 1.0 to 3.0 mm, and the gap amount T1 of the coating liquid channel 11 is equal to or more than the gap amount T2 of the discharge port 12. (For example, T1 = 1.0 to 4.0 mm), both gap amounts are set larger than the conventional one. In the illustrated example, since T1> T2, the lower surface side forming the discharge port 12 and the coating liquid flow path 11 is made the same plane, and a step portion is provided at the boundary portion on the upper surface side. On the contrary, the upper surface side on which the discharge port 12 and the coating liquid flow path 11 are formed may be the same plane, and a stepped portion may be provided on the lower surface side boundary.

Since the gaps T1 and T2 between the coating liquid channel 11 and the discharge port 12 are set larger than the conventional one, the upper and lower divided pieces 6 and 7 and / or the lip portions 13 and 14 are processed and assembled. Therefore, it is possible to cover the portion that comes into contact with the coating solution with a coating layer made of tetrafluoroethylene or the like having excellent releasability. 2, 4 and 6, the die body 4 is provided with a shim 30 at an appropriate position of the discharge port 12 (in the case of the present embodiment, left and right in the center) to block the discharge port 12 locally. However, it may be possible to apply stripe coating.

  As shown in FIG. 4, the coating apparatus 1 of the present invention includes a gap adjusting device 16 that adjusts a gap amount T <b> 1 in the middle of the coating liquid flow path 11. The gap adjusting device 16 is disposed over the entire coating width region E of the coating liquid channel 11 (however, the portion where the shim 30 is disposed may be excluded) and divided in the left-right direction. A choke bar main body 18 (see FIG. 6) in which a plurality of division bars 17 are connected, and an advance / retreat adjustment tool 19 provided for each division bar 17 are provided, and each division bar 17 is advanced and retracted by each advance / retreat adjustment tool 19. Each of the gap amounts T1 in the middle of the coating liquid flow path 11 shared by each divided bar 17 is adjusted.

  As shown in FIG. 4, the choke bar main body 18 is provided on the mating surface 6 a of the upper divided piece 6, and the divided bars 17 are fitted in the recessed grooves 20 extending in the left-right direction, so that the coating liquid flow path 11. Each dividing bar 17 can be moved forward and backward inward. Each dividing bar 17 is appropriately selected according to the characteristics of the coating liquid within the range of 100 to 70 mm in the width direction in the left-right direction. As shown in FIG. 8, each divided bar 17 has a rubber between the main body portion 17b and the contact portion 17c so that the side surfaces 17a, 17a of the adjacent divided bars 17, 17 are brought into close contact with each other with an appropriate compressive stress. In some cases, an elastic layer 17d formed of a soft synthetic resin or the like is provided, and the main body portion 17b and the contact portion 17c are formed of a hard material such as stainless steel.

  As shown in FIG. 4, the advance / retreat adjuster 19 is inserted into each of the plurality of through holes 23 formed in the upper divided piece 6 and connected to the corresponding divided bar 17, A vernier 26 attached to the upper divided piece 6 via a bracket 25 and having an output portion connected to each operation rod 24; by pulling the vernier dial 26a and rotating it to move the divided bar 17 forward and backward; The gap amount T1 (see FIG. 7) in the coating liquid channel 11 can be finely adjusted on the order of several tens of μm. Each advance / retreat adjuster 19 may be configured so that the input rotation of the vernier 26 can be remotely operated by a servo motor (not shown).

  In the coating apparatus 1 according to the present invention, the gaps T1 and T2 (see FIG. 7) between the coating liquid flow path 11 and the discharge port 12 of the die body 4 are set larger than the conventional one, so that a plurality of divisions are made. By using the bar 17, the gap amount T <b> 1 of the coating liquid channel 11 can be finely adjusted on the order of several tens of μm, and the distribution of the discharge amount from the discharge port 12 can be made uniform over the entire region in the left-right direction. In the coating apparatus 1 of the present invention, a step (see FIG. 6) occurs at the boundary between the divided bars 17 and 17 due to the difference in the stop positions of the adjacent divided bars 17 and 17, and the amount of coating liquid passing through both sides of the boundary Even if a slight difference is caused, the coating liquid disperses in the left-right direction while passing through the coating liquid flow path 11 and the discharge opening 12 having a large gap amount T1, T2, so The discharge amount can be made uniform over the entire coating width region E.

  As the coating liquid supply device 5 (see FIG. 1), one that continuously supplies the coating liquid to the coating liquid supply path 21 of the die body 4 or one that intermittently supplies the coating liquid is selected. The The coating liquid supply device 5 that supplies intermittently performs a pumping operation for pumping the coating liquid into the manifold 10 via the coating liquid supply path 21 and a suction operation for sucking the coating liquid in the manifold 10. The one that repeats alternately is selected. The coating apparatus 1 of the present invention guides the coating liquid fed to the manifold 10 to the discharge port 12 via the coating liquid flow path 11 when the coating liquid supply device 5 performs the pressure feeding operation. A coating region having the coating layer M is formed on the substrate W to be coated by uniformly discharging from the entire region in the direction, and when the coating liquid supply device 5 is performing a suction operation, the coating liquid in the manifold 10 is sucked. Then, the coating liquid existing at the discharge port 12 is drawn into the coating liquid flow path 11 to stop the discharge, and a non-application area without the application layer M is formed on the substrate W to be coated. As the coating liquid supply device 5 to be intermittently supplied, the one described in Patent Document 2 is selected and the illustration is omitted, but, for example, a pressure feeding unit that pumps the coating liquid to the die body 4; An intermittent valve provided with an intermittent valve provided between the die body 4 and the pressure feeding means, and a suction / pressure feeding means for sucking or feeding the coating liquid in communication with the die side liquid supply path between the die body 4 and the intermittent valve. In some cases, the coating liquid is sucked from the die side liquid supply path to the suction / pressure feeding means when closing, and the coating liquid is pumped from the suction / pressure feeding means to the die side liquid supply path when the intermittent valve is opened.

  In the coating apparatus 1 of the present invention, the gap amounts T1 and T2 between the coating liquid flow path 11 and the discharge port 12 of the die main body 4 are set to be larger than those of the conventional one. The pressure of the coating liquid that is pumped into the manifold 10 of the main body 4 can be made lower than that of the conventional one. Therefore, in the case of intermittent coating using the coating liquid supply device 5 that is intermittently supplied, during the suction operation, from the coating liquid flow path 11 having a small passage resistance of the coating liquid to the discharge port 12. Since the existing coating liquid can be immediately sucked and the discharge from the discharge port 12 can be stopped immediately, intermittent coating can be performed to obtain a clear boundary between the coating region and the non-coating region.

  As shown in FIGS. 1, 2 and 4, the coating apparatus 1 according to the present invention is configured so that the coating liquid fed from the coating liquid supply apparatus 5 (see FIG. 1) is manifolded via the coating liquid supply path 21. 10, the coating liquid is dispersed in the left-right direction in the manifold 10 and sent to the entire coating width area E of the coating liquid flow path 11, so that the choke bar body 18 of the coating liquid flow path 11 The coating liquid that has passed through the disposed portion is discharged from the entire coating width region E of the discharge port 12 and applied to the substrate W to be coated. When the coating film M formed on the substrate to be coated W is thick in the left-right direction, the nearest dividing bar 17 (if necessary, the nearest dividing bar 17 is disposed in the region of the discharge port 12 where the thick portion is applied. (Including the dividing bar 17 adjacent thereto) is advanced by the advance / retreat adjuster 19 to finely adjust the gap amount T2 in the corresponding region of the coating liquid channel 11 to be small on the order of several tens of μm. The amount of the coating liquid passing through the corresponding area of the flow path 11 is reduced, and conversely, the area of the discharge port 12 where the thin portion is applied is adjacent to the nearest dividing bar 17 (if necessary, adjacent to the nearest dividing bar 17 (Including the dividing bar 17) is retreated by the advance / retreat adjuster 19, and the gap T2 in the corresponding region of the coating liquid channel 11 is finely adjusted to be large on the order of several tens of μm. The amount of the coating liquid that passes through the corresponding area of 11 is increased.

(Other embodiments)
In the case of the embodiment shown in FIG. 1, the coating equipment provided with the coating apparatus 1 of the present invention travels the substrate W to be coated with the backup roll 2 and is fixedly disposed of the coating apparatus 1 of the present invention. However, in addition to this, there is also a mode in which the plate-shaped substrate W to be coated is fixed and the coating apparatus 1 of the present invention is run to perform coating.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a coating apparatus of the present invention, and is a side view showing coating equipment provided with the coating apparatus of the present invention. It is a top view of this invention coating apparatus. It is a rear view of this invention coating apparatus. It is what expanded this invention coating apparatus, (A) is the top view which carried out the partial cross section, (B) is the right sectional view in the BB line of (A). It is a top view which shows the division | segmentation piece of the lower part which the die main body which comprises this invention coating apparatus isolate | separated. It is a bottom view which shows the upper divided piece which the die body which comprises this invention coating apparatus isolate | separated. It is the right sectional view which expanded further the principal part of the present invention coating device. It is front sectional drawing which expands and shows a division | segmentation bar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... This invention coating apparatus, 5 ... Coating liquid supply apparatus, 10 ... Manifold, 11 ... Coating liquid flow path, 12 ... Discharge port, 17 ... Dividing bar, 19 ... Advance / retreat adjustment tool,

Claims (2)

In the die coating apparatus in which the manifold, coating liquid flow path and discharge port extending in one direction are formed in this order from the upstream side to the downstream side in the die body.
The gap amount of the discharge port is selected within a range of 1.0 to 3.0 mm, and the gap amount of the coating liquid channel is equal to or more than the gap amount of the discharge port,
A choke bar main body that is arranged facing the coating liquid flow path and that is connected to a plurality of divided bars divided in one direction of the coating liquid flow path, and an advance / retreat adjuster provided for each divided bar The die coating apparatus characterized in that the gap amount of the coating liquid flow path is adjusted for each divided bar by advancing and retracting each divided bar with each advance / retreat adjuster. A coating liquid supply device that communicates with the manifold is provided. The coating liquid supply device alternately repeats a pressure feeding operation for pumping the coating liquid into the manifold and a suction operation for sucking the coating liquid in the manifold. The die coating apparatus according to claim 1.

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