JP2011194291A - Coating die - Google Patents

Abstract

To provide a slot die excellent in workability when finely adjusting a lip portion.
SOLUTION: A flat portion of a pair of blocks is opposed to each other and spaced apart, and includes a lip portion that discharges a coating liquid that has passed between the flat portions, and a lip width adjusting means that adjusts the lip width. A coating die for controlling the discharge state of the coating liquid, wherein at least one block intersects the slit formed from the surface on the lip portion side toward the inside of the block and substantially parallel to the flat portion of the block. A lip width adjusting means receiving groove formed along the cross-sectional shape of the lip width adjusting means, wherein the lip width adjusting means has a rotation axis perpendicular to the slit between the nut and the fixing ring, and the rotation axis of the rotation axis. With one end protruding outward from the block, it is accommodated in the lip width adjusting means accommodating groove, and the rotating shaft is rotated to sandwich or push the slit between the nut and the fixing ring. It was allowed to act employing an adjustable coating die lip width.
[Selection] Figure 2

Description

  The present invention relates to a coating die used when a coating liquid is applied to a portion to be coated.

  A coating die, a slot die, or the like that discharges a coating liquid from a lip at the tip when a coating liquid is applied to a material to be coated, such as formation of a thin film or application of an adhesive or ink, is used. For example, Patent Document 1 discloses an invention relating to a slot die that discharges a coating liquid from a slot by bringing the tip lip of the slot die close to the surface of a continuously running web.

  When a coating solution is applied using a coating die, an adjustment function for adjusting the coating amount to an arbitrary thickness or making the thickness uniform is desired. In the slot die disclosed in Patent Document 1, the slot die is composed of at least two blocks that can be divided at the slot portion, and the two blocks are assembled by two or more bolt groups having different positions from the lip. A configuration is adopted in which the slot gap is adjusted by adjusting the tightening force of each bolt.

JP 2005-288377 A JP 2008-229560 A

  However, in the technique disclosed in Patent Document 1, since the bolt group for adjusting the slot gap is fixed to the block at equal intervals, fine adjustment of the slot interval at a position other than the fixing portion of each bolt is performed. I could not.

  Therefore, according to the invention disclosed in Patent Document 2, the applicant of the present invention disposes a bolt-type deformation means inside the long lip portion forming block so as to be slidable, and at a desired position of the lip portion forming block, A coating die has been provided that allows fine adjustment of the width. In the coating die disclosed in Patent Document 2, since the entire bolt type deformation means is disposed in the slit, in order to rotate or slide the bolt type deformation means, put a hand in the slit and rotate the fixing nut. It had to be operated, and further improvements were required in terms of workability.

  Accordingly, an object of the present invention is to provide a slot die excellent in workability when performing fine adjustment of the lip portion.

  As a result of intensive studies, the present inventors have achieved the above-mentioned problem by employing the following slot die.

  The slot die according to the present invention comprises a pair of blocks having flat portions, the flat portions facing each other and spaced apart, and a lip that discharges the coating liquid that has passed between the spaced flat portions. And a lip width adjusting means for adjusting a lip width that is a separation distance between the flat portions of the pair of blocks, and the lip width adjusting means adjusts the lip width to control the discharge state of the coating liquid. And a lip width adjusting means comprising a rotating shaft, a nut screwed to the rotating shaft, and a fixing ring having an outer periphery larger than the rotating shaft, and at least one of the pair of blocks Is a slit formed substantially parallel to the flat portion of the block from the surface on the lip portion side toward the inside of the block, and intersects with the slit to rotate the lip width adjusting means. Lip width adjusting means receiving groove formed along the cross-sectional shape in the direction, the lip width adjusting means between the nut and the fixing ring, the rotating shaft is orthogonal to the slit, and one of the rotating shafts In the direction perpendicular to the slit in the lip width adjusting means receiving groove by rotating the rotating shaft of the lip width adjusting means. The lip width can be adjusted by applying a force that sandwiches or pushes the slit between the nut and the fixing ring.

  In the slot die according to the present invention, among the pair of blocks, at least the block in which the lip width adjusting means is arranged has a shape including an inclined surface in which the thickness of the block decreases toward the lip portion. More preferred.

  In the slot die according to the present invention, it is more preferable that the nut provided in the lip width adjusting means is disposed between the slit and the flat portion.

  In the slot die according to the present invention, the pair of blocks are long members, and the slit and the lip width adjusting means receiving groove are formed over substantially the entire width in the length direction of the block, and the lip width adjusting means It is more preferable to adjust the lip width by sliding on the lip width adjusting means receiving groove and arranging it at an arbitrary position.

  In the slot die according to the present invention, it is more preferable that two or more lip width adjusting means are arranged in the lip width adjusting means accommodating groove.

  In the slot die according to the present invention, the block on which the lip width adjusting means is arranged covers the block main body and a part including the fixing ring of the lip width adjusting means from the inclined surface side, and is separated from the block main body. And an auxiliary block arranged so as to form a part of the slit, the auxiliary block being formed along the cross-sectional shape of the portion covering the lip width adjusting means. More preferably formed.

  In the slot die according to the present invention, a concave portion functioning as a manifold is provided in a flat portion of at least one block of the pair of blocks, and the concave portion has an outflow pressure of the coating liquid passing between the flat portions. It is more preferable to perform the adjustment.

  Since the slot die according to the present invention is configured to accommodate the lip width adjusting means in at least one block and elastically deform the block by the lip width adjusting means to adjust the lip width in the lip portion. The state can be controlled with higher accuracy. In addition, since one end portion of the rotation axis of the lip width adjusting means is configured to be accommodated in the lip width adjusting means receiving groove in a state of protruding outward from the block, the rotation axis of the lip width adjusting means can be easily rotated. Thus, workability can be improved.

  The slot die according to the present invention can exert an effect in a slot die for dealing with a wide application area. That is, the pair of blocks used in the present invention is long, and the slit and the lip width adjusting means receiving groove formed in the block extend over substantially the entire width in the length direction of the block, thereby adjusting the lip width. Since the means can be slid and placed at any position, the lip width at the desired position can be finely adjusted. By providing a plurality of lip width adjusting means, it is possible to finely adjust coating unevenness that tends to occur when the coating region is long.

It is a front view showing one embodiment of a coating die concerning the present invention. It is sectional drawing of the coating die in the BB line shown in FIG. It is a side view which shows an example of the lip width adjustment means used for this invention. It is a fragmentary sectional view which shows the shape of the slit of the block which accommodates the lip width adjustment means of the slot die which concerns on this invention, and a lip width adjustment means. It is a fragmentary perspective view of the coating die shown in FIG.

  FIG. 1 is a front view showing an embodiment of a coating die according to the present invention. FIG. 2A is a cross-sectional view showing an embodiment of a coating die according to the present invention. As shown in FIG. 2A, the coating die 1 according to the present invention includes a pair of blocks 2 and 3 and a lip width adjusting means 4. Hereinafter, the coating die according to the present invention will be described while detailing each constituent member.

  As shown in FIG. 2A, the blocks 2 and 3 have flat portions 21 and 31, respectively. The flat portions 21 and 31 of the pair of blocks 2 and 3 are opposed to each other and spaced apart, and the end portions 22 and 32 of the flat portions 21 and 31 constitute the lip portion 5. Then, a coating liquid (not shown) that has passed between the plane portions 21 and 31 that are spaced apart from each other is discharged from the lip portion 5. As shown in FIG. 1, in the present embodiment, a long block is used, and the width at which the coating liquid can be applied at a time is determined by the length of the flat portion of the block.

  In the present embodiment shown in FIG. 2A, the one end portions 22 and 32 of the block constituting the lip portion 5 have a shape protruding at the same height. Further, in the present embodiment shown in FIG. 2A, each of the blocks 2 and 3 has inclined surfaces 24 and 34 inclined from the lip portion 5 side toward the outer surfaces 23 and 33 of the block. Thus, by providing the blocks 2 and 3 with the inclined surfaces 24 and 34, it becomes easy not only to apply, but also to easily adjust the lip width W. That is, in the present invention, out of the pair of blocks 2 and 3, the block 2 in which at least the lip width adjusting means 4 is disposed includes the inclined surface 24 in which the thickness of the block 2 decreases toward the lip portion 5. Thus, the one end portion 22 constituting the lip portion 5 is easily elastically deformed, and the lip width W can be finely adjusted.

  And the discharge state of the coating liquid in the lip | rip part 5 is adjusted in consideration of the viscosity of a coating liquid, supply amount, the material of the plane parts 21 and 31, and a separation distance. However, in consideration of these, simply adjusting the distance between the flat portions 21 and 31 of the blocks 2 and 3 to be constant may cause coating unevenness and may be insufficient. Therefore, the coating die according to the present invention is further made to elastically deform the block by the lip width adjusting means 4 that can be arranged at an arbitrary position, so that the separation distance between the flat portions 21 and 31 of the blocks 2 and 3 is changed to the lip portion 5. Were finely adjusted, and the discharge state of the coating liquid was controlled with high accuracy.

  The block in which at least the lip width adjusting means 4 of the pair of blocks 2 and 3 is accommodated has an external force applied by the lip width adjusting means 4 in a state where a slit 6 and a lip width adjusting means accommodating groove 7 which will be described later are formed. If the portion of the block 2 on the front end 22 side is elastically deformed by the addition, and the distance between the flat portion 21 near the lip portion 5 and the opposing flat portion 31 can be adjusted, there is a particular restriction on the material. There is no. For example, iron-based materials, copper-based materials, and the like can be given.

  Here, the lip width adjusting means may be provided in only one block, or the lip width adjusting means may be provided in both blocks. In the embodiment shown in FIG. 2A, the lip width adjusting means 4 is provided only in one block 2 of the pair of blocks 2 and 3. The other block 3 has a recess 35 in the plane portion 31. The concave portion 35 functions as a manifold and adjusts the outflow pressure of the coating liquid passing through the flow path.

  The block 2 to which the lip width adjusting means 4 is attached is provided with a slit 6 and a lip width adjusting means accommodating groove 7. The slit 6 is formed substantially parallel to the flat surface portion 21 of the block 2 from the surface (inclined surface) 24 on the lip portion 5 side of the block 2 toward the inside of the block 2. The slit 6 is formed with a dimension corresponding to the movable range of the end portion 22 constituting the lip portion 5 of the block 2. Specifically, the slit 6 is formed with such a width that the end portion 22 of the block 2 forming the lip portion 5 can be elastically deformed to such an extent that it does not contact the end portion 32 of the other block 3.

  As shown in FIG. 2A, the lip width adjusting means accommodating groove 7 is formed at a position intersecting with the slit 6 in a shape along the axial sectional shape of the rotating shaft 41 of the lip width adjusting means 4. The lip width adjusting means accommodating groove 7 accommodates the lip width adjusting means 4 and also serves as a rail for sliding the lip width adjusting means 4. Therefore, the lip width adjusting means receiving groove 7 is formed with a size slightly larger than the lip width adjusting means 4. The shape of the lip width adjusting means housing groove 7 will be described in detail after the description of the lip width adjusting means 4. If the slit 6 and the lip width adjusting means accommodating groove 7 are formed over substantially the entire width in the length direction of the block 2, the lip width adjusting means 4 can be arranged at an arbitrary position.

  However, in order to arrange the lip width adjusting means 4 in the lip width adjusting means accommodating groove 7 of the block 2, an insertion port for the lip width adjusting means 4 is required. Therefore, in the present embodiment, as shown in FIGS. 4 and 5, the block 2 in which the lip width adjusting means 4 is arranged is configured to include the auxiliary block 8 in addition to the block body 20. The auxiliary block 8 covers a part including the fixing ring 43 of the lip width adjusting means 4 from the surface (inclined surface) on the lip portion 5 side of the block main body 20 and is spaced apart from the block main body 20 so as to be separated from the slit 6 and the lip. It arrange | positioned so that a part of width adjustment means accommodation groove | channel 7 might be formed. Of the auxiliary block 8, a second lip width adjusting means accommodating portion formed on the surface of the block body 20 facing the lip width adjusting means accommodating groove 7 along the cross-sectional shape of the portion covering the lip width adjusting means 4. 81 is formed. Specifically, a second fixing ring accommodating portion 81a having a shape along the cross-sectional shape of the fixing ring disposed in the portion of the auxiliary block 8 that covers the lip width adjusting means 4 is formed, and the block body 20 is fixed. The fixing ring 43 can be accommodated so as to be opposed to the ring accommodating portion 73, and is referred to as a second lip width adjusting means accommodating portion 81.

  As shown in FIG. 5, the auxiliary block 8 is engaged with the block main body 20 at the end in the longitudinal direction in a state where the lip width adjusting means 4 is disposed in the lip width adjusting means accommodating groove 7. Specifically, a convex portion 82 is formed at the end of the auxiliary block 8 in the longitudinal direction, and is fitted into the fixing ring accommodation groove 73 of the lip width adjusting means accommodation groove 7 included in the block body 20. And the auxiliary block 8 is fixed to the block main body 20 with the screw from the inclined surface 84 side at the end portion of the auxiliary block 8 in the longitudinal direction.

  Here, in the claims and specification of the present application, it is described that the slit 6 and the lip width adjusting means accommodating groove 7 of the block 2 are formed over substantially the entire width in the length direction of the block. The substantially full width in the block length direction means that the lip width is adjusted in order to attach the auxiliary block 8 to the block body 20 as in this embodiment in addition to the full width reaching both ends in the block length direction. This includes the case where both end portions of the means receiving groove 7 are closed by the convex portions 82 of the auxiliary block 8.

  Next, the lip width adjusting means 4 will be described. FIG. 3 is a side view showing an example of the lip width adjusting means 4 used in the present invention. The lip width adjusting means 4 includes a rotating shaft 41, a nut 42 that is screwed to the rotating shaft 41, and a fixing ring 43 that is fixed to the rotating shaft 41. The rotating shaft 41 has a length in which one end is accommodated in the lip width adjusting means accommodating groove 7 inside the block 2 and the other end protrudes outward from the block 2. The nut 42 has a polygonal outer periphery. The nut 42 has a size that allows the outer periphery of the nut 42 to sandwich or push the slit 6 together with the fixing ring 43. The fixing ring 43 has a larger outer periphery than the rotation shaft 41 and is fixed to the rotation shaft 41 with a pin 44. The fixing ring 43 prevents the lip width adjusting means 4 from moving in the direction of the rotation axis (the direction of the arrow M shown in FIG. 2A), and also sandwiches or pushes the slit 6 together with the nut 42 to rotate the rotation axis. The outer circumference was larger than 41.

  In the embodiment shown in FIG. 3, a nut 42 is screwed to one end of the rotating shaft 41, and a fixing ring 43 is fixed at a position apart from the nut 42. As shown in FIGS. 1 and 2, the rotary shaft 41 has the other end protruding outward from the block 2. Further, as in the embodiment shown in FIG. 2, a handle 45 may be provided at the end protruding from the block 2 of the rotating shaft 41 in order to facilitate the rotation of the lip width adjusting means 4.

  As shown in FIG. 2A, the lip width adjusting means 4 includes a rotation shaft 41 perpendicular to the slit 6 between the nut 42 and the fixing ring 43 and one end portion of the rotation shaft 41. Is housed in the lip width adjusting means housing groove 7 in a state of protruding outward from the block 2.

  Again, the lip width adjusting means accommodating groove 7 will be described in detail. FIG. 4 is a partial cross-sectional view showing the shape of the slit of the block for accommodating the lip width adjusting means and the lip width adjusting means. As shown in FIGS. 2 and 4, the lip width adjusting means accommodating groove 7 includes a rotating shaft accommodating portion 71 for accommodating the rotating shaft 41 of the lip width adjusting means 4, a nut accommodating portion 72 for accommodating the nut 42, It consists of fixing ring accommodating portions 73 and 81a for accommodating the fixing ring 43. The rotating shaft accommodating portion 71 is formed to have a size that allows the rotating shaft 41 of the lip width adjusting means 4 to rotate and to slide in the longitudinal direction of the block 2. The fixing ring accommodating portion 73 is formed to have a size that allows the fixing ring 43 to rotate and is slidable in the longitudinal direction of the block 2.

  The nut housing portion 72 is formed in such a size that the rotation of the nut 42 is restricted and the block 2 is slidable in the longitudinal direction. In addition, the length of the nut housing portion 72 in the direction of the rotation axis (the direction of the arrow M shown in FIG. 4) is a length that regulates the region in which the nut 42 can move in the direction of the rotation axis. That is, by continuing to rotate the rotating shaft 41 in a state where the rotation of the nut 42 is restricted, the nut 42 moves in the rotating shaft direction (the direction of the arrow M shown in FIG. 4), and finally the nut housing portion 72 It abuts on one of the side walls 72a and 72b. Since the slit 6 is sandwiched or pushed open by the force that the nut 42 abuts against the side walls 72a and 72b of the nut housing portion 72, the length of the nut housing portion 72 in the rotation axis direction is the slit 6 and the lip width W. And the size of the block 2 in consideration of the elastic deformation amount.

  When the lip width adjusting means 4 rotates the rotating shaft 41 while being accommodated in the lip width adjusting means accommodating groove 7, the fixing ring 43 rotates together with the rotating shaft 41. On the other hand, the outer peripheral corner portion of the nut 42 abuts against the nut housing portion 72, and its rotation is restricted, and moves along the rotation shaft (in the direction of arrow M in FIG. 2A) as the rotation shaft 41 rotates. For example, when viewed from the direction of arrow C in FIG. 2A, when the rotation shaft 41 is rotated counterclockwise (in the direction of arrow L in FIG. 2B), the nut 42 moves to the slit 6 side, and eventually, It contacts the side surface 72b of the nut accommodating portion 72 on the slit 6 side. At this time, since the position of the fixing ring 43 does not change, as a result, the separation distance between the nut 42 and the fixing ring 43 is reduced. As a result, a force in a direction to sandwich the slit 6 and reduce the separation distance acts on the block 2 from the lip width adjusting means 4, and the lip width W of the lip portion 5 can be widened.

  On the other hand, when the rotation shaft 41 of the lip width adjusting means 4 is rotated clockwise (in the direction of the arrow R in FIG. 2B), the nut 42 moves to the plane portion 21 side in a state where the rotation is restricted, Eventually, it comes into contact with the side surface 72a of the nut housing portion 72 on the flat surface portion 21 side. At this time, the separation distance between the nut 42 and the fixing ring 43 increases. As a result, the force in the direction of pushing the slit 6 acts on the block 2 from the lip width adjusting means 4, and the lip width W of the lip portion 5 can be reduced.

  In the present invention, the fixing ring 43 and the nut 42 are arranged so as to sandwich the slit 6, and the nut 42 is moved in the direction of the rotation axis by the rotation of the rotation shaft 41, so that the nut 42 and the fixing ring 43 form the slit 6. It is only necessary to apply a force that sandwiches or pushes the slit 6 from the orthogonal direction. Therefore, the nut 42 and the fixing ring 43 may be disposed at a position sandwiching the slit 6. In the embodiment shown in FIGS. 2 and 3, the nut 42 is disposed between the plane portion 21 and the slit 6. A fixing ring 43 is disposed between the slit 6 and the outer surface 23 of the block 2. In addition, a fixing ring may be disposed between the flat portion 21 and the slit 6, and a nut may be disposed between the slit 6 and the outer surface 23 of the block 2. Comparing the two, as shown in FIG. 2, the configuration in which the nut 42 is disposed between the flat surface portion 21 and the slit 6 is directly on the portion between the flat surface portion 21 and the slit 6 of the block 2. It is preferable because a large force is easily applied and the accuracy of adjusting the lip width W in the lip portion 5 is high.

  As shown in FIG. 1, in the case of a coating die having a long block, if a plurality of lip width adjusting means are used, the lip width W can be finely adjusted at various positions by arranging a plurality of lip width adjusting means. . In addition, this invention is applicable not only to what has an elongate block, but the lip width of arbitrary positions can be finely adjusted using arbitrary numbers of lip width adjustment means. As shown in FIG. 1, the lip width adjusting means is arranged so that one end portion of the rotating shaft 41 protrudes from the block 2, so that workability at the time of fine adjustment of the lip width W is improved.

  The coating die according to the present invention can easily adjust the discharge state of the coating film using the lip width adjusting means, and the lip width adjusting means can be arranged at an arbitrary position. It can be used in the field of coating dies requiring wide and uniform coating, the field of T-die for extrusion lamination, and the like.

DESCRIPTION OF SYMBOLS 1 ... Coating die 2, 3 ... Block 4 ... Lip width adjustment means 5 ... Lip part 6 ... Slit 7 ... Lip width adjustment means accommodation groove 8 ... Auxiliary block 24, 34 ... Inclined surface 35 ... Recess 41 ... Rotating shaft 42 ... Nut 43 ... Fixing ring 81 ... Second lip width adjusting means housing W ... Lip width

Claims (7)

A pair of blocks each having a flat surface portion are configured so that the flat surface portions are opposed to each other and spaced apart, and a lip portion that discharges the coating liquid that has passed between the spaced flat surfaces is formed between the pair of blocks. A lip width adjusting means for adjusting a lip width that is a separation distance between flat portions, and a coating die for controlling the discharge state of the coating liquid by adjusting the lip width by the lip width adjusting means,
The lip width adjusting means includes a rotating shaft, a nut screwed to the rotating shaft, and a fixing ring having an outer periphery larger than the rotating shaft,
At least one of the pair of blocks includes a slit formed substantially in parallel with the flat portion of the block from the surface on the lip side toward the inside of the block, and intersects with the slit to rotate the lip width adjusting means. A lip width adjusting means accommodating groove formed along the cross-sectional shape in the axial direction,
The lip width adjusting means is formed in the lip width adjusting means receiving groove between the nut and the fixing ring in a state where the rotating shaft is orthogonal to the slit and one end of the rotating shaft protrudes outward of the block. Contained,
By rotating the rotation axis of the lip width adjusting means, it is possible to adjust the lip width by applying a force to pinch or open the slit with a nut and a fixing ring from the direction perpendicular to the slit in the lip width adjusting means receiving groove. A coating die characterized by. 2. The coating die according to claim 1, wherein at least one of the pair of blocks in which the lip width adjusting means is disposed has an inclined surface in which the thickness of the block decreases toward the lip portion. The coating die according to claim 1 or 2, wherein a nut provided in the lip width adjusting means is disposed between the slit and the flat portion. The pair of blocks are long members, and the slit and the lip width adjusting means receiving groove are formed over substantially the entire width in the length direction of the block,
The coating die according to any one of claims 1 to 3, wherein the lip width adjusting means slides on the lip width adjusting means receiving groove and is arranged at an arbitrary position to adjust the lip width. The coating die according to claim 4, wherein two or more lip width adjusting means are disposed in the lip width adjusting means receiving groove. The block on which the lip width adjusting means is arranged covers the block main body and a part including the fixing ring of the lip width adjusting means from the inclined surface side, and is spaced apart from the block main body so that a part of the slit is formed. An auxiliary block arranged to form,
The coating die according to claim 4 or 5, wherein the auxiliary block forms a second lip width adjusting means accommodating portion formed along a cross-sectional shape of a portion covering the lip width adjusting means. A concave portion that functions as a manifold is provided in a flat portion of at least one of the pair of blocks, and the concave portion adjusts the outflow pressure of the coating liquid that passes between the flat portions. The coating die in any one of Claims 1-6.

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