JP2017104793A - Coating applicator and coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely adjust an application width of a coating liquid applied to an applied object without complicating a device configuration and causing scattering and leakage of the coating liquid and disturbance of a coating film etc.SOLUTION: A coating applicator has a coating tool 1, in which a tool body 2 is formed by attaching multiple head members 3 with their side surfaces adhering to each other, and discharges a coating liquid C from a manifold 4 formed on the side surfaces through a groove 5 opening on a tip part of the tool body 2 to apply the coating liquid C to an applied object W. Multiple liquid supply passages 6 are connected with the manifold 4 so as to be spaced away from each other in a longitudinal direction of the manifold 4. Coating liquid C supply means 7A is connected to a liquid supply passage 6A forming a part of these liquid supply passages 6. Seal liquid S supply means 7B is connected with the other liquid supply passage 6B. At least one of these supply means 7A, 7B includes liquid supply amount adjustment means capable of adjusting a supply amount of the supplied liquid.SELECTED DRAWING: Figure 1

Description

  The present invention has a coating tool in which a tool body is configured by attaching a plurality of head members with their side surfaces in close contact with each other, and a groove that opens from a manifold formed on the side surface to a tip portion of the tool body The present invention relates to a coating apparatus that discharges a coating liquid through the coating material and applies the coating liquid to an object to be coated, and a coating method using the coating apparatus.

  In such a coating apparatus, in order to adjust the coating width to the coating object, the shim sandwiched between the side surfaces of a plurality of head members that normally constitute the tool body of the coating tool is replaced, and the coating liquid is discharged. In general, the opening length of the groove to be adjusted is adjusted, but the coating tool must be once removed from the coating device and disassembled, which requires time and labor. In view of this, the coating apparatus described in Patent Documents 1 to 3 has been proposed as an attempt to adjust the coating width on the coating apparatus without removing or disassembling the coating tool.

  Among these, in the coating apparatus described in Patent Document 1, the coating tool includes at least one gas or air introducing means in one of the two die lips, and this introducing means is for the coating liquid in the die lip. The one connected to the manifold has been proposed, and the coating width is adjusted by changing the pressure of gas or air supplied through the introduction means.

  In addition, the coating apparatus described in Patent Document 2 includes a keyboard-type member that forms at least a part of the top surface of the die land, and a position-adjustable mechanism that raises and lowers the keyboard-type member. Thus, the groove is partially opened and closed to adjust the coating width or to apply the coating liquid in a stripe shape.

  Furthermore, in the coating apparatus described in Patent Document 3, a shaft-shaped deckle main body having an outer shape corresponding to the manifold of the coating tool, and a sheet-shaped or film-shaped deckle having an outer surface corresponding to a groove extending from the manifold. By using an inner deckle having an auxiliary portion and moving the inner deckle in the longitudinal direction of the manifold, the coating width is also adjusted by adjusting the opening length of the groove by the deckle auxiliary portion. .

JP-A-9-103728 JP 2006-263590 A JP 2013-189011 A

  However, in the case where the coating width is adjusted by the pressure of gas or air as in the coating apparatus described in Patent Document 1, when the coating liquid has a high viscosity or when coating is performed at high speed, the pressure of the gas or air There is a risk that the flow rate of gas or air will increase and the coating solution will scatter, or the end of the coating film in the width direction may be disturbed.

  Further, the structure in which the coating width is adjusted by raising and lowering the keyboard-type member as in the coating apparatus described in Patent Document 2 has a complicated structure, and is adjusted only by a coating width that is set in advance according to the width of the keyboard-type member. Can not do.

  Further, even if the coating width is adjusted by the movement of the inner deckle as in the coating device described in Patent Document 3, the structure becomes complicated, and even if a sealing member is provided, the coating liquid may leak due to wear or the like. Can not wipe.

  The present invention has been made under such a background, and the application width of the coating liquid to the object to be coated is reduced without complicating the structure of the apparatus, scattering or leakage of the coating liquid, and disturbance of the coating film. It is an object of the present invention to provide a coating apparatus that can be freely adjusted, and a coating method for coating a coating liquid on an object to be coated using the coating apparatus.

  In order to solve the above-described problems and achieve such an object, the coating apparatus of the present invention is configured such that a plurality of horizontally long head members are attached with their side surfaces extending in the longitudinal direction of the head members in close contact with each other. A coating body having a tool body configured by the above, and a coating liquid is applied to an object to be coated by discharging a coating liquid from a manifold extending in the longitudinal direction formed on the side surface through a groove opened at a tip portion of the tool body. In the apparatus, a plurality of liquid supply paths are connected to the manifold at intervals in the longitudinal direction, and among the liquid supply paths, supply of the coating liquid is performed in some liquid supply paths. And a sealing liquid supply means is connected to the remaining liquid supply path, and at least one of these supply means has a liquid supply amount adjusting means capable of adjusting the supply amount of the supplied liquid. Preparation It is characterized in that is. In addition, the coating method of the present invention is characterized in that a coating solution is applied to an object to be coated by such a coating apparatus.

  In the coating apparatus configured as described above, a coating liquid supply means is connected to some of the plurality of liquid supply paths connected to the manifold, and a seal liquid is connected to the remaining liquid supply paths. In the manifold, the coating liquid is in a predetermined range in the longitudinal direction communicating with a part of the liquid supply paths, and in a predetermined range in the longitudinal direction communicating with the remaining liquid supply paths. A sealing liquid is supplied, and is discharged through a groove and applied to an object to be coated. In addition, as a sealing liquid, what is not soluble or miscible with a coating liquid is used, or a small one is used, and a volatile liquid is used to remove the sealing liquid after coating.

  Since at least one of these supply means is provided with a liquid supply amount adjustment means capable of adjusting the supply amount of the supplied liquid, at least one of the coating liquid and the seal liquid is provided by this liquid supply amount adjustment mechanism. By adjusting one supply amount, the predetermined range in the longitudinal direction in which the coating liquid and the sealing liquid are supplied in the manifold can be continuously increased or decreased. Accordingly, along with this, the width of the coating film formed by applying the coating liquid to the object to be coated through the groove can be freely adjusted.

  For this reason, a plurality of liquid supply paths connected to the manifold need only be formed at predetermined positions in the coating tool at intervals in the longitudinal direction, and no leakage of the coating liquid occurs, and these liquid supply paths The supply means for the coating liquid and the sealing liquid connected to the liquid can also be used as the liquid supply amount adjusting means if it is a normal liquid supply pump capable of adjusting the supply amount, which may lead to a complicated structure of the apparatus. Absent. Furthermore, since the coating liquid and the sealing liquid are both liquids, even when the coating liquid has a high viscosity or when the coating liquid is applied at a high speed, the coating liquid and the sealing liquid It is possible to prevent scattering and disturbance of the coating film width.

  Further, three or more liquid supply paths are connected to the manifold, and these liquid supply paths are alternately connected to the coating liquid supply means and the seal liquid supply means in the longitudinal direction, For example, it is possible to apply the coating liquid in a stripe shape as in the coating apparatus described in Patent Document 2, or to adjust the position of the coating film in the longitudinal direction while maintaining the coating width.

  As described above, according to the present invention, the coating width of the coating liquid to the coated object is prevented while preventing the complexity of the apparatus structure and preventing the scattering and leakage of the coating liquid and the disorder of the coating film. Can be freely adjusted.

It is the perspective view seen through in the case of apply | coating the coating film | membrane with a wide application | coating liquid of the coating liquid which shows the 1st Embodiment of this invention. It is the perspective view seen through in the case of apply | coating the coating film with a narrow application | coating width | variety of the coating liquid in embodiment shown in FIG. It is the see-through | perspective view which showed the 2nd Embodiment of this invention. It is the see-through perspective view which shows the 3rd Embodiment of this invention.

  1 and 2 show a first embodiment of a coating apparatus of the present invention. In the present embodiment, the tool main body 2 of the application tool 1 is configured by attaching a plurality of (in the present embodiment, two) head members 3 having a horizontally long block, with one side surface extending in the longitudinal direction being brought into close contact with each other. ing. The side surfaces to which these head members 3 are brought into close contact are each formed with a semicircular recess having a radius equal to the position corresponding to each other, and by combining these recesses, the side surfaces in the tool body 2 are combined. A manifold 4 having a circular cross section extending in the longitudinal direction of the head member 3 is formed.

  Further, a groove 5 having a length slightly shorter than the manifold 4 in the longitudinal direction is formed along the side surface from the manifold 4 to the tip end portion (the lower portion in FIGS. 1 to 4) of the tool body 2. Open to the tip. Such a coating tool 1 has a coating surface (upper surface) of a sheet-shaped or plate-shaped workpiece P with the tip end portion of the tool body 2 having the groove 5 opened downward as shown in FIGS. 1 to 4, for example. The coating liquid C supplied to the manifold 4 is moved in the groove 5 while being moved relative to the workpiece P in the moving direction indicated by the arrow F in the figure. Then, the ink is discharged and applied to the object P.

  Further, a plurality of liquid supply paths 6 are formed in the tool body 2, and these liquid supply paths 6 are connected to the manifold 4 at intervals in the longitudinal direction of the manifold 4. In the present embodiment, three liquid supply paths 6 are formed, and one liquid supply path 6 </ b> A, which is a part of the liquid supply paths 6, intersects the longitudinal direction of the manifold 4 in the longitudinal direction. The remaining two liquid supply paths 6B are connected to both ends of the longitudinal direction of the manifold 4 along the longitudinal direction of the manifold 4.

  Of these liquid supply paths 6, in the present embodiment, the supply means 7A for the coating liquid C is connected to the part of the liquid supply paths 6A, and the remaining liquid supply path 6B contains the seal liquid S. Supply means 7B is connected. Therefore, these liquid supply paths 6 (6A, 6B) are alternately connected to the supply means 7A for the coating liquid C and the supply means 7B for the seal liquid S in the longitudinal direction of the manifold 4.

  Further, at least one of the supply means 7A and 7B is provided with a liquid supply amount adjusting means capable of adjusting the supply amount of the supplied liquid. In this embodiment, the supply means 7A and the seal for the coating liquid C are sealed. Both the supply means 7B for the liquid S are provided with such a liquid supply amount adjusting means. These supply means 7A and 7B are liquid supply pumps for supplying, for example, the coating liquid C and the sealing liquid S held in the tank to the liquid supply paths 6A and 6B, and for supplying the coating liquid C and the sealing liquid S. The supply amount can be adjusted. Accordingly, in this embodiment, the supply means 7A and 7B themselves also serve as the liquid supply amount adjustment means.

Here, as the seal liquid S, a liquid that is not soluble or miscible with the coating liquid C or a liquid that is little is used. The solubility and miscibility between liquids can be known to some extent by the solubility parameters by Hansen and Hildebrand. Among these, Hansen's solubility parameter is based on the following formula (1) based on the dispersion terms between two liquids: dD ₁ , dD ₂ , polar terms: dP ₁ , dP ₂ , hydrogen bond terms: dH ₁ , dH _2. The value Ra calculated by (1) is insoluble when Ra> 36 to 37 when one liquid is water, and is insoluble when Ra> 18 between liquids other than water.

  Table 1 also shows that A: water, B: acetonitrile, and C: cyclohexane, which are liquids often used as a solvent for the liquid applied by the coating apparatus, among the main liquid combinations based on the Hansen solubility parameter. , D: methyl ethyl ketone, E: methanol, F: dimethylformamide, G: the above value Ra based on the solubility parameter of each combination of dimethyl sulfoxide. In Table 1, combinations marked with a cross are insoluble. In addition, when it is necessary to remove the sealing liquid S promptly after application, it is desirable to use a volatile one as the sealing liquid S.

  In the coating method according to the first embodiment of the present invention in which the coating liquid C is applied to the workpiece P by the coating apparatus according to the first embodiment having the above-described configuration, the combinations shown in Table 1 are marked with a cross. One of these liquids is supplied as a coating liquid C or a solvent of the coating liquid C by the supply means 7A to a part of the liquid supply path 6A, and the other as a seal liquid S to the remaining liquid supply path 6B by the supply means 7B. Supply. The coating liquid C and the sealing liquid S supplied in this way flow into the manifold 4 and are discharged through the groove 5, but are insoluble in each other so that they are not mixed in the manifold 4 or the groove 5 and are not mixed in the longitudinal direction. And are applied to the application surface of the application object P with a substantially constant application width.

  At this time, the groove length L (mm) from the manifold 4 to the opening of the groove 5 at the tip of the tool body 2 and the groove 5 in the direction orthogonal to the longitudinal direction when viewed from the opening of the groove 5 are as follows. Supply viscosity of coating solution C: μc (cps) and supply of coating solution C with respect to value α given based on the following equation (2) by groove width t (mm) and radius R (mm) of manifold 4 Amount: Qc (mL / min), coating width Wc (mm) of coating liquid C, viscosity of sealing liquid S: μs (cps), supply amount of sealing liquid S: Qs (mL / min), sealing liquid S The relationship with the coating width Ws (mm) is as shown in Equation (3) (however, the coating width Ws of the sealing liquid S is two strips of sealing liquid applied by discharging from both longitudinal ends of the manifold 4). It is the total width of the coating width Ws of S. In the formula (3), e is a natural logarithm. Is (Napier number).).

  Therefore, from the case where the coating film having the wide coating width Wc of the coating liquid C shown in FIG. 1 is applied, the supply amount of the sealing liquid S by the liquid supply amount adjusting means of the supply means 7A and 7B is expressed by the equation (3). When the adjustment is made so as to increase in accordance with the ratio of the viscosity and the supply amount, the application width Ws of the sealing liquid S is increased and the application width Wc of the application liquid C is reduced as shown in FIG. On the other hand, when the supply amount of the sealing liquid S is adjusted by the liquid supply amount adjusting means so as to decrease according to the ratio of the viscosity and the supply amount shown in Expression (3), the coating width Ws of the sealing liquid S is It becomes small and the coating width Wc of the coating liquid C becomes wide.

  Thus, according to the coating apparatus and the coating method having the above-described configuration, the coating width Wc of the coating liquid C can be set on the coating apparatus without removing the coating tool 1 from the coating apparatus and disassembling the tool body 2. It is possible to adjust. Moreover, the application width Wc of the coating liquid C can be adjusted continuously and freely by operating the liquid supply amount adjusting means provided in the supply means 7A and 7B for the coating liquid C and the seal liquid S, and the supply means 7A, By using 7B as a liquid supply pump, it can also be used as a liquid supply amount adjusting means, and it is also possible to avoid complication of the apparatus structure.

  Further, the tool main body 2 of the application tool 1 is simply formed with a plurality of liquid supply paths 6A and 6B connected to the manifold 4 at predetermined positions at intervals in the longitudinal direction. There is no possibility of leakage of liquid C or seal liquid S. Further, since the coating liquid C and the sealing liquid S are both liquids, the coating liquid C and the sealing liquid S can be prevented from being scattered by using a sealing liquid having the same viscosity when the viscosity of the coating liquid C is high. it can.

  Furthermore, in the present embodiment, three or more (three in the present embodiment) liquid supply paths 6 are connected to the manifold 4 of the tool body 2, and these liquid supply paths 6 are connected to the longitudinal direction of the manifold 4. The coating liquid C supply means 7A and the seal liquid S supply means 7B are alternately connected in the direction to form a liquid supply path 6A for the coating liquid C and a liquid supply path 6B for the seal liquid S, respectively. For this reason, when the liquid supply path 6A of the coating liquid C is connected to the longitudinal center part of the manifold 4 and the liquid supply path 6B of the seal liquid S is connected to both longitudinal ends as in the present embodiment. For example, the coating width Wc of the coating liquid C can be adjusted in a range up to substantially the entire length of the opening of the groove 5 in the longitudinal direction of the manifold 4, and for example, the liquid of the sealing liquid S to the liquid supply path 6B at both ends. By adjusting the supply amount to a different amount, the position of the coating film in the longitudinal direction can be adjusted to a different position while keeping the coating width Wc of the coating liquid C as it is.

  In the present embodiment, the liquid supply path 6A for the coating liquid C is connected to the central portion in the longitudinal direction of the manifold 4 and the liquid supply path 6B for the seal liquid S is connected to both longitudinal ends. On the contrary, if the liquid supply path 6B of the sealing liquid S is connected to the central part in the longitudinal direction of the manifold 4 and the liquid supply path 6A of the coating liquid C is connected to both ends in the longitudinal direction, Patent Document 2 Similarly to the described coating apparatus, the coating liquid C can be applied in the form of two stripes, and even in this case, the coating width Wc of the coating liquid C can be adjusted.

  Further, in the present embodiment, three liquid supply paths 6 are connected to the manifold 4, but, for example, four or more (5 in the second embodiment is 5) as in the second embodiment of the present invention shown in FIG. If the liquid supply path 6 is connected to the manifold 4, the coating liquid C can be applied in two or more strips (three strips in the second embodiment) while the coating width Wc of the coating liquid C can be adjusted. It becomes possible to do. On the other hand, two liquid supply paths 6 are connected to the manifold 4 as in the third embodiment of the present invention shown in FIG. 4, and the liquid supply path 6A for the coating liquid C and the seal liquid S are respectively connected. In this case, the coating width Wc of the coating film of the single coating liquid C can be adjusted. In the second and third embodiments shown in FIGS. 3 and 4, the same reference numerals are assigned to the parts common to the first embodiment shown in FIGS. 1 and 2.

  In the first to third embodiments, both the supply means 7A for the coating liquid C and the supply means 7B for the seal liquid S are used as the liquid supply pump and are also used as the liquid supply amount adjusting means. One of the supply means 7A and 7B is not provided with the liquid supply amount adjusting means, and always supplies a constant amount of the coating liquid C or the seal liquid S, and the other is provided with the liquid supply amount adjusting means provided in the other. The coating widths Wc and Ws of the coating liquid C and the sealing liquid S may be adjusted.

DESCRIPTION OF SYMBOLS 1 Application tool 2 Tool main body 3 Head member 4 Manifold 5 Groove 6 Liquid supply path 6A Liquid supply path of coating liquid C 6B Liquid supply path of seal liquid S 7A Supply means of coating liquid C 7B Supply means of seal liquid S C Coating liquid S Seal liquid P Object to be coated F Relative movement direction of the coating tool 1 Wc Coating width of coating liquid C Ws Coating width of sealing liquid S

Claims (3)

A plurality of horizontally long head members have an application tool in which a tool body is configured by attaching the side surfaces extending in the longitudinal direction of the head members in close contact, and extend in the longitudinal direction formed on the side surfaces. A coating apparatus that discharges a coating liquid from a manifold through a groove that opens to the tip of the tool body and coats an object to be coated,
A plurality of liquid supply paths are connected to the manifold at intervals in the longitudinal direction,
Among these liquid supply paths, the supply means for the coating liquid is connected to some liquid supply paths, and the supply means for sealing liquid is connected to the remaining liquid supply paths,
At least one of these supply means is provided with a liquid supply amount adjusting means capable of adjusting the supply amount of the supplied liquid.   Three or more liquid supply paths are connected to the manifold, and these liquid supply paths are alternately connected to the coating liquid supply means and the seal liquid supply means in the longitudinal direction. The coating apparatus according to claim 1.   A coating method, wherein a coating liquid is applied to an object to be coated by the coating apparatus according to claim 1.

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