JP2013066853A - Coating die head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the amount of adjustment for clearance and further uniformize the thickness of a coating film in a width direction of a coated article, in a coating die head capable of adjusting the clearance between an upper die and a lower die which correspond to a discharge port of a coating liquid.SOLUTION: The coating die head 26 includes: an upper die 2 having a lower face; and a lower die 1 which faces the lower face to form a clearance 9 for discharging a coating liquid. Also, a die part from the lower face of the upper die 2 to the face in the opposite side to the lower face is separated from the die 2 as an upper lip 4. An adjustment mechanism, which adjusts the distance of the clearance 9 by parallelly moving the upper lip 4 against the upper face of the lower die 1, includes a wedge 5, a top plate 3 and an adjustment screw 7 as members. Further, a die head 26 includes a fixation screw 6 capable of fixing the upper lip 4, as one component for the adjustment mechanism.

Description

  The present invention relates to a coating die head for performing coating by discharging a coating liquid onto a workpiece to form a film.

  In the step of coating the coating liquid on a certain surface in a film shape, a die head including a pair of upper and lower dies arranged with a certain gap is used. When the coating liquid is supplied into the die head from the supply port provided in the die head, the coating liquid is discharged from the gap between the dies on the tip side of the die head onto the moving coated surface, and a coating film with a certain thickness is formed. It is supposed to be formed.

  In the coating die head disclosed in Patent Document 1, in order to make the gap (gap) between the upper and lower dies on the tip side of the die head corresponding to the coating liquid discharge port uniform across the die width direction, as shown in FIG. A shim 103 having a thickness capable of realizing a desired coating thickness is sandwiched between the lower die 101 and the upper die 102, and the upper and lower dies 101, 102 are fastened with screws (not shown).

  However, when setting gaps with shims, changing the coating thickness requires disassembling the die head into an upper die and a lower die, replacing the shims, and cleaning the manifold inside the die head. It causes a reduction in the operating rate of the device.

  Therefore, a die head having a mechanism capable of changing the thickness of the coating film has been proposed in Patent Documents 2 and 3 and the like. These die heads are provided with a mechanism for adjusting a gap between the upper and lower dies corresponding to the discharge port of the coating liquid in a space formed in one of the upper and lower dies.

JP 2006-223999 A Japanese Patent Laying-Open No. 2003-024857 (FIG. 2) Japanese Patent Laying-Open No. 2004-321911 (FIG. 2)

  However, in the die heads disclosed in Patent Documents 2 and 3, the tip portion of one die is pressed from the inner space of one die so that the tip portion is inclined toward the other die side, so that the coating solution The gap between the upper and lower dies corresponding to the discharge port is reduced.

  Therefore, regarding the wall surface of the upper die and the wall surface of the lower die that form the gap, the angle of the wall surface of the lower die with respect to the wall surface of the upper die changes according to the adjustment amount of the gap. As a result, the fluidity of the coating liquid passing between the wall surface of the upper die and the wall surface of the lower die also changes. This complicates the discharge control of the coating liquid. Further, since the deflection of the die itself is used, the adjustment amount of the gap is small and the effect of adjusting the coating thickness is small.

  Further, the mechanical component in which the tip of one die is inclined toward the other die is fixed after the gap is adjusted, but the one die itself is not fixed. Therefore, there is a possibility that the adjustment amount of the gap changes during the discharge of the coating liquid, and an appropriate adjustment amount may not be ensured.

  The present invention aims to solve the above-described problems. One example of the purpose is a coating die head capable of adjusting the gap between the upper and lower dies corresponding to the discharge port of the coating liquid, stabilizing the adjustment amount of the gap, and in the width direction of the object to be coated. The purpose is to make the coating thickness more uniform.

  The present invention includes a first die having a first plane, a second die having a second plane facing the first plane so as to form a gap for discharging a coating liquid, It is related with the coating die head provided with.

And one aspect of this invention which solves the said subject is:
A die portion separated from the first die from the first plane of the first die to a surface opposite the first plane;
An adjusting mechanism that translates the first plane of the die portion with respect to the second plane to adjust the gap spacing;
A fixing mechanism capable of fixing the die part;
It is provided with.

  According to the present invention, with respect to the coating die head capable of adjusting the gap between the upper and lower dies corresponding to the discharge port of the coating liquid, the adjustment amount of the gap is stabilized, and the width in the width direction of the object to be coated is stabilized. Further uniformization of the coating thickness can be achieved.

The side view which showed an example of the coating device provided with the coating die head by one Embodiment. The front view and sectional drawing which show the detailed structure of the coating die head by one Embodiment. The disassembled perspective view of the coating die head by one Embodiment. The disassembled perspective view of the coating die head by other embodiment. The disassembled perspective view of the coating die head by other embodiment. The disassembled perspective view of the coating die head which is a related technique (patent document 1) of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The coating die head according to the present invention can be used for an object that needs to be coated with a film having a certain thickness on the surface.

  FIG. 1 is a side view showing an example of a coating apparatus provided with a coating die head according to an embodiment of the present invention. As shown in this figure, the coating die head 26 of the present embodiment is supported by a roll 25 and disposed opposite to an object to be coated (surface 24) that is running. In a coating process in which a coating liquid is discharged from the coating die head 26 onto the surface 24 in a film form and a film having a certain thickness is applied onto the surface 24, the coating liquid sent from the pump 21 through the pipe 22 is: It is fed into the coating die head 26. At this time, the liquid amount is controlled by the valve 23.

  A detailed configuration of the coating die head 26 is shown in FIG. 2A is a front view showing a surface of the coating die head 26 on the coating liquid discharge port side, and FIG. 2B is a sectional view taken along line XX in FIG. FIG. 3 is an exploded perspective view of the coating die head 26.

  As shown in FIGS. 2 and 3, the coating die head 26 includes a lower die 1, an upper die 2, a top plate 3, an upper lip 4, a wedge 5, a fixing screw 6, an adjusting screw 7, and the like.

  A lower surface 32 of the upper die 2 is joined to the upper surface 31 of the lower die 1, thereby forming a cylindrical space manifold 8 for storing the coating liquid sent from the valve 22 (FIG. 1). The lower die 1 is provided with a supply port 10 for supplying a coating liquid to the manifold 8.

  A tip portion of the lower die 1 from which the coating liquid is discharged has a lower lip 33. A portion of the upper die 2 that is opposed to a portion from the notch 34 for the manifold 8 to the lower lip 33 on the upper surface 31 of the lower die 1 is cut out to form a concave space 35. The upper lip 4 is disposed in the concave space 35 of the upper die 2. In other words, the portion of the upper die 2 corresponding to the plane from the notch 34 to the lower lip 33 of the lower die 1 is separated from the upper die 2 as the upper lip 4.

  A gap 9 (gap) is opened between the flat portion of the lower surface of the upper lip 4 and the flat portion of the upper surface of the lower die 1 corresponding thereto. Further, a wedge 5 for adjusting the gap 9 is disposed on the upper surface of the upper lip 4 in the concave space 35.

  The upper surface of the upper lip 4 and the lower surface of the wedge 5 are adjacent to each other, and both adjacent surfaces are slopes inclined downward in accordance with the discharge direction of the coating liquid (see FIG. 2B).

  A top plate 3 is disposed on the upper die 2 and the wedge 5, and the top plate 3 is fixed to the upper surface of the upper die 2 with screws (not shown). The upper surface of the wedge 5 and the lower surface of the top plate 3 have a plane parallel to the plane portion of the lower surface of the upper lip 4.

  The fixing screw 6 is screwed into the upper lip 4 after being inserted into the through holes 36 and 37 (that is, the holes that are not threaded) formed in both the top plate 3 and the wedge 5. ing. By tightening the fixing screw 6, the wedge 5 is sandwiched between the upper lip 4 and the top plate 3, and the upper lip 4 is fixed.

  Further, an adjusting screw 7 which is a wedge driving part for moving the wedge 5 in the coating liquid discharge direction is screwed into the wedge 5 through the upper die 2. The wedge 5 has a female screw into which the tip of the adjusting screw 7 is screwed. In addition, in order not to prevent the movement of the wedge 5 as described above, the through hole 37 through the fixing screw 6 is a long hole that is long in the moving direction of the wedge 5.

  It should be noted that a precise screw mechanism such as that used in a micrometer may be employed for the adjustment screw 7 that adjusts the position of the wedge 5.

  Next, the operation of the coating die head 26 of the present embodiment, particularly the adjustment of the gap 9 serving as a coating liquid discharge port will be described. Refer to FIG. 2 in this description.

  When adjusting the gap 9, first, the adjuster loosens the plurality of fixing screws 6 to bring the wedge 5 and the upper lip 4 into a movable state. Subsequently, the position of the wedge 5 is changed by turning the adjusting screw 7 screwed into the wedge 5 through the upper die 2.

  When the adjusting screw 7 is rotated in the loosening direction, the wedge 5 moves in the coating liquid discharge direction, and the upper lip 4 becomes movable upward, so that the gap 9 expands. Further, when the adjusting screw 7 is rotated in the screwing direction, the wedge 5 moves in the direction opposite to the coating liquid discharge direction, and the upper lip 4 becomes movable downward, so that the gap 9 becomes narrower. At this time, when the slope of the slope of the wedge 5 is 1/10, when the adjusting screw 7 is moved by 1 mm, the gap 9 changes by 0.1 mm.

  When the wedge 5 and the upper lip 4 move, a clearance is required between the upper die 2, but if there is a clearance of about 5 μm between the wedge 5, the upper lip 4 and the upper die 2, the movement of both parts is possible. Fully possible and no leakage of coating liquid.

  After moving the wedge 5 as described above and adjusting the gap 9 to a desired amount, the adjuster completes the gap 9 adjustment by tightening all the fixing screws 6 to the upper lip 4.

  According to the coating die head 26 of the present embodiment described above, the gap 9 can be adjusted without disassembling the die head.

  In particular, with regard to the plane portion of the lower surface of the upper lip 4 and the plane portion of the upper surface 31 of the lower die 1 forming the gap 9, in adjusting the gap 9 gap, the plane portion of the lower surface of the upper lip 4 is the lower die. It is displaced while maintaining a parallel state with respect to the flat portion of the upper surface 31 of 1, that is, moves in parallel. For this reason, since the change in the fluidity of the coating liquid passing between the upper lip 4 and the lower die 1 accompanying the gap adjustment is qualitative, the discharge control of the coating liquid is simplified. Further, since the plane portion of the lower surface of the upper lip 4 is configured to move in parallel with the plane portion of the upper surface 31 of the lower die 1, the gap 9 is adjusted as compared with the techniques described in Patent Document 2 and Patent Document 3. It is also possible to increase the range.

  Furthermore, since the upper lip 4 can be fixed by the fixing screw 6, the adjustment amount of the gap 9 does not change during the discharge of the coating liquid, and an appropriate adjustment amount is ensured. Therefore, the coating film thickness in the width direction of the workpiece can be further uniformed.

"Other embodiment examples"
Next, other exemplary embodiments will be described. FIG. 4 is an exploded perspective view of a coating die head according to another embodiment, and FIG. 4 is an exploded perspective view of a coating die head according to still another embodiment. Only the differences from the above-described embodiment (see FIG. 3) will be described here.

  As shown in FIG. 4, the wedge 5 and the upper lip 4 are not integral parts, but in a direction (Y direction in the drawing) that is perpendicular to the discharge direction of the coating liquid and that is parallel to the plane portion of the lower surface of the upper lip 4. You may divide | segment into the several site | part of the same width. The divided parts of the wedge 5 and the divided parts of the upper lip 4 can be adjusted and fixed using the adjusting screw 7 and the fixing screw 6 in the same manner as in the above-described embodiment. May be. As a result, the local gap 9 can be adjusted in the Y direction.

  Further, as shown in FIG. 5, only the wedge 5 is not an integral part and is divided into a plurality of parts in the Y direction, and each part of the wedge 5 is the same as the above-described embodiment. Further, the position may be adjusted and fixed using the adjusting screw 7 and the fixing screw 6. In this configuration, since the upper lip 4 is not divided as in the example of FIG. 4, the upper lip 4 is partially bent by adjusting the position of each divided portion of the wedge 5. Thus, the local gap 9 can be adjusted in the Y direction.

  In the above-described embodiment, the upper lip 4 of the upper die 2 is configured to be movable with respect to the lower die 1. However, the lower lip portion of the lower die 1 is configured to be movable with respect to the upper die 2. May be. In other words, the die head according to the present invention may be an embodiment in which the die head 26 of FIG. 3 is turned upside down.

  The coating die head according to the present invention has a uniform coating film in the width direction of the base material when a coating material such as an active material and a conductive paste used for a ceramic chip capacitor or the like is applied on the base material. It can be applied to a coating process and a coating apparatus for increasing the thickness.

DESCRIPTION OF SYMBOLS 1 Lower die 2 Upper die 3 Top plate 4 Upper lip 5 Wedge 6 Fixing screw 7 Adjustment screw 8 Manifold 9 Gap 10 Supply port 21 Pump 22 Pipe 23 Valve 24 Surface 25 Roll 26 Die head 31 Upper surface 32 of lower die Upper surface 33 of upper die Lower lip 34 Notch 35 Recessed space 36 Through hole 37 Through hole (long hole)

Claims (4)

A coating comprising: a first die having a first plane; and a second die having a second plane facing the first plane so as to form a gap for discharging the coating liquid. In the engineering die head,
A die portion separated from the first die from the first plane of the first die to a surface opposite the first plane;
An adjusting mechanism that translates the first plane of the die portion with respect to the second plane to adjust the gap spacing;
A fixing mechanism capable of fixing the die part;
A coating die head characterized by comprising: The die portion has a first inclined surface whose surface opposite to the first flat surface is inclined toward the first flat surface according to the discharge direction of the coating liquid,
The adjustment mechanism is
A wedge disposed adjacent to the first slope of the die portion; a second slope contacting the first slope; and the second slope formed on the opposite side of the second slope. A wedge having a third plane parallel to the one plane;
A plate fixed to the first die, having a fourth plane parallel to the first plane and in contact with the third plane of the wedge;
A wedge drive component that moves the wedge along a direction parallel to a discharge direction of the coating liquid in order to translate the first plane of the die portion with respect to the second plane;
The coating die head according to claim 1, wherein the fixing mechanism is a mechanism that fixes the die portion so that the wedge is sandwiched between the plate and the die portion. The wedge and the die portion are divided into a plurality of portions having the same width in a direction perpendicular to the discharge direction of the coating liquid and in a direction parallel to the first plane,
The adjusting mechanism can move each part of the wedge, and the fixing mechanism can fix each part of the die part with the wedge part interposed between the plate and each part of the die part. The coating die head according to claim 2, which is possible. The wedge is divided into a plurality of parts in a direction perpendicular to the discharge direction of the coating liquid and in a direction parallel to the first plane;
The adjustment mechanism can move each part of the wedge, and the fixing mechanism can fix the die part with the part of the wedge sandwiched between the plate and the die part. The coating die head according to claim 2.

Images