JP2012005919A - Coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating apparatus in which the bending of a comma type roll is adjusted even in the application of a high viscous coating liquid.SOLUTION: A reverse type coating apparatus 10 includes a regulating device 48 which is disposed above the width-direction center of the comma type roll 12 and regulates the upper portion of the comma type roll 12 by a rod 64 to thereby regulate the upward bending of the comma type roll 12.

Description

  The present invention relates to a coating apparatus for coating a high-viscosity coating liquid.

  Conventionally, in a coating apparatus using a comma-type roll having a doctor edge, as shown in FIG. 6, the central portion of the comma-type roll 200 is bent upward by the liquid pressure of the coating liquid, and coating with the coating roll 202 is performed. There was a problem that the work gap 204 was not uniform in the width direction.

  Therefore, the present applicant has proposed a coating apparatus that can finely adjust the bending of the comma roll even during operation (see, for example, Patent Document 1). In this coating apparatus, a comma-type roll is formed in a cylindrical shape, a worm is arranged radially in the center of the comma-type roll, and a motor having a worm gear for moving the worm in the radial direction is arranged. The worm tip is pressed against the inner peripheral wall of the cylindrical comma-type roll to adjust the bending of the doctor edge.

JP-A-7-303856

  In the comma type roll of the above coating apparatus, it is possible to resist bending due to the liquid pressure of the coating liquid, but if the coating is highly viscous, the liquid pressure is very large and may not be able to counter. is there. In particular, when a high-viscosity epoxy resin is applied to a substrate, the liquid pressure of the coating liquid becomes very large, and the above-described comma type roll has a problem that bending occurs.

  Therefore, in view of the above problems, the present invention provides a coating apparatus that can adjust the bending of a comma-type roll even when a high-viscosity coating liquid is applied.

  The present invention includes a comma-type roll having at least a doctor edge at a lower part, a coating roll disposed below the comma-type roll and disposed through the doctor edge and a coating gap, and the comma-type roll And a reservoir for supplying a coating liquid to the coating gap between the comma-type roll and the coating roll, a substrate, and a substrate. In a coating apparatus for coating the base material with the coating liquid applied on the surface of the coating roll by the doctor edge. The control device includes a restriction device disposed at least above the central portion in the width direction of the comma-type roll, and the restriction device has a lower end of a rod protruding from a lower portion of the restriction device fixed to an upper portion of the comma-type roll. , Regulating the bending upward the serial comma roll, it is a coating apparatus according to claim.

  According to the present invention, the rod can regulate the bending upward of the comma type roll by the regulating device.

It is explanatory drawing of the coating apparatus of Example 1 of this invention. It is a side view of a coating apparatus similarly. It is a front view of a coating apparatus similarly. It is a longitudinal cross-sectional view of the center part of the coating apparatus of Example 2. It is a front view of the coating apparatus of Example 2. It is a front view of the conventional coating apparatus.

  Hereinafter, the coating apparatus 10 of one Example of this invention is demonstrated using drawing.

  Hereinafter, the coating apparatus 10 of Example 1 of this invention is demonstrated based on FIGS. 1-3.

  The coating apparatus 10 according to the present embodiment is a long base material (for example, for example) that travels at a traveling speed (for example, 15 m / min) V of a high-viscosity coating liquid (for example, epoxy resin) of 10,000 to 1,000,000 CPS. , Release paper) 1. The release paper coated with the epoxy resin by the coating apparatus 10 is attached to the carbon fiber formed in a sheet shape, and then heated to form a prepreg resin.

(1) Structure of the coating apparatus 10 The structure of the coating apparatus 10 of a present Example is demonstrated based on FIGS. 1-3.

  The coating apparatus 10 includes a comma roll 12, a coating roll 14 disposed below the comma roll 12, a liquid reservoir 16 disposed on one side of the coating roll 14, and the other side of the coating roll 14. It is a reverse type coating apparatus having a backup roll 18 arranged in the section.

  The comma type roll 12 is formed in a comma shape in cross-section by forming doctor edges 20 and 22 along the width direction at the lower part and the upper part of a metal roll, respectively. The comma-type roll 12 is supported in the horizontal direction by the second frame 40 and is fixed so as not to rotate during operation of the coating apparatus 10. On the other hand, when stopped, the comma-type roll 12 can be rotated 180 degrees for cleaning.

  The coating roll 14 is a metal driving roll supported by the first frame 26 so as to be rotatable in the horizontal direction, and is rotated in accordance with the traveling speed V of the substrate 1 by a driving motor (not shown). The coating roll 14 is arranged via the doctor edge 20 of the comma-type roll 12 and the coating gap, and the coating liquid is applied to the surface thereof. In addition, the rotational speed of the coating roll 14 may be made to correspond with the traveling speed V, and may be made slower than the traveling speed V, and the coating amount to the base material 1 may be reduced.

  The liquid reservoir 16 supplies a coating liquid to the coating gap, and a liquid reservoir plate 24 is arranged obliquely from one side of the coating roll 14, and the comma roll 12, the coating roll 14, The coating liquid (epoxy resin) heated during the period is stored in a dam shape. Although not shown in the drawings, the liquid reservoir 16 is provided with both side plates for storing the coating liquid. The liquid reservoir 16 is fixed to the first frame 26.

  The backup roll 18 is made of metal that conveys the base material 1, contacts the base material 1 with the surface of the coating roll 14, and coats the surface of the base material 1 with the coating liquid applied by the comma roll 12. The drive roll. The backup roll 18 is supported by a frame (not shown) so as to be rotatable in the horizontal direction, and is rotated in accordance with the traveling speed V of the substrate 1 by a drive motor (not shown).

  The first frame 26 includes a pair of left and right first left side plates 30 and a first right side plate 32 erected from both sides of a horizontal base 28 installed on the floor. Each of the pair of left and right first left and right side plates 30 and 32 includes a roll support portion 34 that rotatably supports the coating roll 14 in the horizontal direction, and a second frame that extends upward from the roll support portions 34 and 34. The portion 36 is formed. The front portion of the second frame holding portion 36 has a front portion formed so as to incline toward the rear as it is upward, and a rail 38 is attached to the front portion in the vertical direction. A second frame 40 is provided to be movable up and down via a pair of left and right rails 38.

  The second frame 40 has a pair of left and right second left side plates 42 and second right side plates 44 that support the comma type roll 12 in the horizontal direction. In order to connect the pair of left and right second left side plates 42 and second right side plate 44, a horizontal fixing portion 46 is installed above the comma type roll 12.

  A regulating device 48 for regulating upward bending of the comma type roll 12 is attached to the central portion of the horizontal fixing portion 46. The regulating device 48 will be described in detail later.

  As described above, the second frame 40 is attached to the second frame holding portions 36 and 36 of the first frame 26 via the pair of left and right rails 38 and 28 so as to be movable up and down. As shown in FIG. 2, in order to move the second frame 40 up and down, the lower surfaces of the second left side plate 42 and the second right side plate 44 of the second frame 40, and the pair of left and right roll support portions 34. Cotters 50 and 50 are arranged between the respective upper surfaces. The pair of left and right cotters 50 rotate the male screw portion 55 by a cotter motor 54 made of an AC servomotor, and the wedge portion 52 into which the male screw portion 55 is screwed moves in the front-rear direction. The gap between the first frame 26 and the first frame 26 is adjusted, and the second frame 40 is moved up and down. The cotter motor 54 is not limited to an AC servo motor, and may be another motor.

  As shown in FIGS. 2 and 3, hydraulic cylinders 56, 56 are respectively attached to the upper portions of the pair of left and right second frame holding portions 36, 36 of the first frame 26, and the pair of left and right hydraulic cylinders 56, 56 cylinder portions 58 and 58 are fixed to a pair of left and right cylinder receivers 62 and 62 protruding from the second left side plate 42 and the second right side plate 44 via floating joints 60 and 60, respectively. The pair of left and right hydraulic cylinders 56 and 56 restricts the second frame 40 from moving upward.

  As shown in FIG. 1, a thickness sensor 74 for detecting the coating thickness of the base material 1 coated with the coating liquid is provided on the transport path of the base material 1 behind the backup roll 18. .

(2) Restriction device The structure of the restriction device 48 will be described.

  The restriction device 48 is attached to the upper surface of the central portion of the horizontal fixing portion 46 provided on the second frame 40, and a rod-shaped rod 64 protrudes from the lower portion of the restriction device 48. The protruding direction protrudes in the vertical direction when viewed from the front (width direction), and protrudes in the axial direction of the coating roll 14 from the axial center of the comma roll 12 as viewed from the side. The lower end of the rod 64 is inserted into a hole 66 opened in the upper surface of the central portion in the width direction of the comma-type roll 12, and the lower end of the rod 64 is brought into contact with the comma-type roll 12 so as to bend upward of the comma-type roll 12. Is regulated. The regulating device 48 includes a bending motor 70 that moves the rod 64 up and down, a gear box 68, and a torque tender 72 interposed between the gear box 68 and the bending motor 70. The torque tender 72 protects the bending motor 70 by disconnecting the connection between the gear box 68 and the bending motor 70 when an overload occurs, and automatically connects with the same torque again when the overload is removed. To do. Then, the bending motor 70 is rotated to move the rod 64 up and down to adjust the protruding length.

(3) Operational state of coating apparatus 10 Next, the operational state of the coating apparatus 10 will be described.

  First, the operator stores the heated coating liquid in the liquid reservoir 16 and holds the base material 1 on the backup roll 18.

  Next, the operator uses the cotter motor 54 to lower the second frame 40 so that the doctor edge 20 of the comma-type roll 12 and the coating roll 14 pass through a coating gap (for example, about 30 μm). Adjust so that The cotter motor 54 adjusts the coating gap to be the same size at any position in the width direction by moving the wedge portion 52 of the cotter 50.

  Next, the rod 64 of the regulating device 48 does not press the upper part of the comma roll 12 downward before coating, but the position of the lower end of the rod 64 is the same at any position in the width direction of the coating gap. The operator fixes the rod 64 by moving it up and down by the bending motor 70 so that the comma-type roll 12 is not bent upward while maintaining the dimensions. Hereinafter, the position of the lower end of the rod 64 is referred to as “coating reference position”.

  Next, the operator rotates the coating roll 14 and the backup roll 18 at the traveling speed V, and applies the coating liquid to the surface of the coating roll 14 by the doctor edge 20 of the comma-type roll 12. The coating liquid applied to the surface of the roll 14 is applied to the surface of the substrate 1 being conveyed by the backup roll 18. Here, since the epoxy resin which is a coating liquid has high viscosity, the liquid pressure from the epoxy resin to the comma-type roll 12 is 1 to 20 t / m. However, since the lower end of the rod 64 is fixed at the coating reference position and the central portion of the comma-type roll 12 is restricted so as not to bend upward, bending does not occur. Further, even if the liquid pressure of the coating liquid increases, the second frame 40 to which the restriction device 48 is attached is restricted from moving upward by the pressure of the pair of left and right hydraulic cylinders 56, 56. The lower end of the rod 64 of the device 48 does not move from the coating reference position.

(4) Effects According to the present embodiment, the upward bending of the comma-type roll 12 is restricted by the rod 64 of the restriction device 48, so that the comma-type roll 12 bends even when high hydraulic pressure is applied. Therefore, the coating liquid can always be applied with a uniform coating gap. Further, even if the liquid pressure of the coating liquid increases, the second frame 40 to which the restriction device 48 is attached is restricted from moving upward by the pressure of the pair of left and right hydraulic cylinders 56, 56. The lower end of the rod 64 of the device 48 does not move beyond the rigidity of the second frame 40 from the coating reference position.

  Further, since the rod 64 only regulates the bending of the comma-type roll 12 and is not pressed downward, the comma-type roll 12 may bend downward even when the hydraulic pressure of the coating liquid decreases. Absent.

  In addition, since the rod 64 can be moved in the vertical direction by the bending motor 70, the deflection of the second frame 40 can be covered by the movement of the rod 64, so that the coating apparatus 10 can be downsized.

  Further, the coating roll 14 is also bent due to the liquid pressure of the coating liquid, and a uniform coating gap can be secured by pushing the rod 64 toward the comma-type roll 12 for the amount of the bending.

  In addition, since the function of adjusting the pushing and pulling of the rod 64 is provided, the coating gap can be positively adjusted by arbitrarily pushing the comma type roll 12, and the coating distribution accuracy can be controlled with high accuracy.

(6) Modified Example In the above embodiment, the coating thickness on the substrate 1 was measured by the thickness sensor 74, but instead of this, a measurement sensor that measures the bending amount of the comma roll 12 near the rod 64 is used. Then, the coating gap may be measured.

  Next, the coating apparatus 10 of Example 2 of this invention is demonstrated based on FIGS.

  The difference between the present embodiment and the first embodiment is the structure of the regulating device 48. The restriction device 48 of the present embodiment will be described.

(1) Structure of the second frame 40 Above the horizontal fixing portion 46 of the second frame 40 of this embodiment, an upper horizontal fixing portion 96 spanned between the second left side plate 42 and the second right side plate 44. Is stretched horizontally. A vertical member 78 is erected in the vertical direction between the upper horizontal fixing portion 96 and the horizontal fixing portion 46 and on the back surface of the central portion. The vertical member 78 is provided with a rail 80 that can move up and down.

(2) Structure of Restricting Device 48 In the restricting device 48 of this embodiment, a rod holding portion 76 is provided above the horizontal fixing portion 46 of the second frame 40, and the rod holding portion 76 includes a vertical member 78 and a rail 80. It can be moved up and down via The rod 64 protrudes downward from the lower surface of the front portion of the rod holding portion 76 and is attached to the central portion of the upper surface in the width direction of the comma-type roll 12 as in the first embodiment.

  A cotter 82 is attached between the lower surface of the rod holding portion 76 and the horizontal fixing portion 46 of the second frame 40. The wedge portion 84 of the cotter 82 can be moved in the horizontal direction by a cotter moving device 86. The cotter moving device 86 includes a cotter motor 88, a torque tender 90, and a gear box 92, and rotates the cotter motor 88 to rotate the gear box 92 via the torque tender 90. Then, the male screw portion 94 protruding from the gear box 92 rotates, and the wedge portion 84 with which the male screw portion 94 is screwed is moved in the horizontal direction.

  A hydraulic cylinder 98 is attached to the center of the upper surface of the upper horizontal fixing portion 96, and the cylinder portion 100 of the hydraulic cylinder 98 extends downward and is fixed to the upper surface of the rod holding portion 76 via the floating joint 102. The hydraulic cylinder 98 prevents the rod 64 and the rod holding portion 76 from being pushed back upward by the liquid pressure of the coating liquid.

(3) Effect According to the present embodiment, as in the first embodiment, the lower end of the rod 64 is adjusted and fixed to the coating reference position by the cotter moving device 86, so that the coating liquid is high. Even if the comma type roll 12 tries to bend upward due to the hydraulic pressure, the rod 64 can regulate the bending. Further, even if the rod 64 is pushed back upward by a high liquid pressure of the coating liquid, the pressure can be regulated by the pressure of the hydraulic cylinder 98.

Example of change

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

  In each of the above-described embodiments, the regulating device 48 is provided only at the central portion of the comma-type roll 12. May be. Three or more restriction devices 48 may be provided.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 Coating apparatus 12 Comma type roll 14 Coating roll 16 Liquid storage part 18 Backup roll 20 Doctor edge 26 1st frame 40 2nd frame 48 Control apparatus 64 Rod

Claims (6)

A comma-type roll having at least a doctor edge at the bottom; and
A coating roll disposed below the comma-type roll and via the doctor edge and a coating gap;
A reservoir portion that is formed on one side of the comma-type roll and the coating roll, and that supplies a coating liquid to the coating gap between the comma-type roll and the coating roll;
While conveying the substrate, a backup roll arranged on the other side of the coating roll,
In the coating apparatus for coating the base material, the coating liquid applied on the surface of the coating roll by the doctor edge,
Having a regulating device arranged above at least the central part in the width direction of the comma-type roll;
The restriction device has a lower end of a rod protruding from a lower portion of the restriction device fixed to an upper portion of the comma-type roll, and restricts bending upward of the comma-type roll.
A coating apparatus characterized by that. A frame that supports the comma-type roll in a horizontal direction and supports the regulating device;
The coating apparatus according to claim 1. The regulating device is
Gear means for moving the rod downward;
A motor for driving the gear means;
The coating apparatus according to claim 1, comprising: The regulating device is
A cotter for moving the rod downward;
A motor for moving the cotter;
The coating apparatus according to claim 1, comprising: The coating liquid has a high viscosity of 10,000 to 1,000,000 CPS.
The coating apparatus according to claim 1. A hydraulic cylinder that restricts the upward movement of the rod;
The coating apparatus according to claim 1.

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