JPH05115825A - Coating device - Google Patents

Abstract

PURPOSE:To form a coating film having a uniform film thickness and broad film width even on an object to be coated having a rugged coating surface. CONSTITUTION:Fixed distance holding members 4 which maintains the specified distance between the discharge port of a fixed amt. coating head 2 and the coating surface are provided on both sides of the discharge port of the fixed amt. coating head 2. The fixed amt. coating head 2 is mounted on a direct moving member 5 movably toward the coating object 1 fixed on a table 3 moving at the fixed speed. The direct moving member 5 is fixed with a rotating member 6 mounted on a rotating member mounting plate supported by a stand to a rotating member 5 freely rotatable around the X-axis. As a result, the fixed amt. coating head 2 is moved in the Z-axis direction and is rotated around the X-axis in correspondence to the rugged shape of the coating surface by the fixed distance holding members 4. The distance between the discharge port of the fixed amt. coating head 2 and the coating position is maintained constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus, and more particularly to a coating apparatus which continuously extrudes a coating object which is extruded toward a surface of a coating object which is moving along a predetermined traveling path, through a quantitative coating head. The present invention relates to an extrusion type coating device for coating a surface of a coating object with a uniform thickness.

[0002]

2. Description of the Related Art Generally, an extrusion-type coating apparatus includes a coating material supply mechanism that is horizontally rotatable and movable up and down, as disclosed in, for example, Japanese Patent Laid-Open No. 58372/1988. A nozzle attached to the lower end of the coating supply mechanism facing the target object, a roller rotatable in the vertical direction provided in the vicinity of the nozzle, and a coating target object fixed to the surface and horizontally relative to the coating target supply mechanism. It consists of a table to move to. The above-mentioned conventional coating device continuously discharges the coating material from the nozzle and simultaneously moves the table in the horizontal direction to continuously coat the coating material on the surface of the coating object. At this time, the roller is brought into contact with the surface of the coating object and the coating material supplying mechanism moves up and down on the surface of the coating object in accordance with the unevenness, so that the coating material is coated with a uniform film thickness.

[0003]

However, in the above-mentioned conventional coating apparatus, when a coating object is coated on a coating object having irregularities, the coating supply mechanism is applied to the irregularities in the traveling direction. A uniform coating film thickness can be obtained by following up and down movement, but it cannot move following the unevenness at right angles to the traveling direction and at right angles to the discharge direction of the applied material. There is a problem that a uniform coating film thickness cannot be obtained when a coating film having a wide film width is formed on an object.

The present invention has been made in view of the problems of the above-mentioned conventional coating apparatus. Even when a coating film having a wide film width is formed on the coating surface of an object having irregularities, a uniform coating film thickness is obtained. It is an object to provide an obtained coating device.

[0005]

In order to achieve the above object, the coating apparatus of the present invention continuously discharges a coating material onto a coating object 1 as shown in the conceptual diagrams of FIGS. 1 and 2. Quantitative coating head 2, a coating material quantitative supply device (not shown) for supplying the coating material to the quantitative coating head 2, and a movement for fixing the coating object 1 and moving at a constant speed relative to the quantitative coating head 2. In a coating device including a table 3, at least two or more constant distance holding members 4 attached to the quantitative coating head 1 and a linear motion for movably holding the quantitative coating head 2 toward the coating surface of the coating object 1. It is composed of a member 5 and a rotary member 6 for rotatably holding the quantitative coating head 2 via the linear motion member 5.

[0006]

In the coating apparatus configured as described above, after fixing the coating object 1 on the moving table 3, the coating material is fed from the coating material quantitative supply device (not shown) through the tube 7 to the quantitative coating head 2. And is continuously extruded from the quantitative coating head 2. At the same time, the moving table 3 is moved in the X-axis direction at a constant speed. At this time, due to the constant distance holding member 4, the linear movement member 5 guides the unevenness on the coating surface in the X-axis direction, and the quantitative coating head 2 moves in the Z-axis direction according to the unevenness (see FIG. 1). ). In addition, the unevenness in the Y-axis direction includes
The rotating member 6 rotates the fixed quantity coating head 2 around the X axis (see FIG. 2). Then, the movement of the quantitative coating head 2 in the Z-axis direction and the rotation around the X-axis are combined, and
The quantitative coating head 2 moves with respect to the coating position of the coating object so that the fall distance of the coating material extruded from is always constant.

[0007]

Embodiment 1 FIGS. 3 to 5 show a coating apparatus according to Embodiment 1 of the present invention, FIG. 3 is a perspective view, FIG. 4 is a front view, and FIG. 5 is a side view. In the coating apparatus 10 of the present embodiment, a table 12 on which a substrate 11 of an object to be coated is placed is arranged on an XY table (not shown), and the XY table is an X-axis, Y-axis driven by a drive unit (not shown). It can move in the axial direction at a predetermined speed. A magnet stand 13 is fixed near the table 12, and a rotary member fixing plate 14 is mounted on the magnet stand 13. The rotary member fixing plate 14 is arranged above the table 12, and the rotary member 15 having a rotary shaft parallel to the table 12 is fixed.

As shown in FIGS. 6 and 7, the rotary member 15 is composed of two cylindrical members which are coaxially rotatable relative to each other, and one of the cylindrical members 15a (hereinafter referred to as the fixed rotary member 15).
a) is fixed to the rotary member fixing plate 14, and the other cylindrical member 15b (hereinafter referred to as the rotary rotary member 15b).
The linear guide member 16 is fixed (see FIG. 5). The fixed rotary member 15a and the rotary rotary member 15b are fitted in the recess formed in the fixed rotary member 15a and the projection formed in the rotary rotary member 15b, and are formed on the peripheral surfaces of the recess and the projection, respectively. Ball bearings 19 are arranged in the V-grooves 17 and 18 and are rotatably connected while restricting movement in the rotation direction. Reference numeral 20 is a screw hole for the rotary member fixing plate of the fixed rotary member 15a, and 21 is a screw hole for attaching the linear guide of the rotary rotary member 15b.

A fixed amount coating head 22 is attached to the linear guide member 16 so as to be movable in the Z-axis direction. That is, a guide 16a having a concave side surface is formed on the linear guide member 16, and a concave member 22a provided on the quantitative coating head 22 is slidably fitted to the guide 16b.

A tube 23 connected to a coating material quantitative supply device (not shown) is connected to the upper portion of the quantitative coating head 22. A discharge port portion 24 having a discharge port 24a (see FIG. 8) for the coating material is provided at the lower end of the quantitative coating head 22, and constant distance holding members 25 are provided on both sides of the discharge port portion 24.

The constant distance holding member 25 is a member for holding the distance between the discharge port 24a and the substrate 11 constant, and FIG.
Further, as shown in FIG. 9, it comprises a case 26, a cover 27, a ball bearing 28 and the like. Case 26
Are fixed to the both sides of the ejection port 24 at the lower end of the quantitative application head 25 by screws 29. Case 26
A recess 26a is formed in the center of the lower surface of the coil spring 30.
Is stored. A cover 27 is fixed to the lower surface of the case 26 with screws 31. The cover 27 has
A projecting opening 26a is formed corresponding to the recess 26a, and the tip of the opening 26 is formed with a diameter smaller than the diameter of the ball bearing 28. The ball bearing 28 is
The coil spring 30 is urged outward, and while being prevented from coming off at the tip of the opening 27a of the cover 27, the cover 27 is rotatably disposed in the recess 26a with a part thereof protruding outward. The pair of swivel casters 32 shown in FIG. 10 can be used as the constant distance holding member.

Next, the operation of the coating apparatus 10 of this embodiment will be described. The substrate 11, which is the object to be coated, is fixed on the table 12, and then the coated material is supplied from the coating material quantitative supply device (not shown) to the quantitative coating head 22 via the tube 23 and continuously from the ejection port 25a. Extrude onto the substrate 11. At the same time, the table 12 is moved at a constant speed in the X-axis direction. At this time, the ball bearing 2 of the constant distance holding member 25
Reference numeral 8 rolls on the substrate 11 to keep the distance between the substrate 11 and the discharge port 25a constant. Even if the substrate 11 has irregularities, the ball bearing 28 rolls on the irregularities. In this case, in the unevenness in the X-axis direction, the quantitative coating head 22 is guided by the linear guide member 16 and moves in the Z-axis direction according to the unevenness. Further, on the unevenness in the Y-axis direction, the rotary rotation member 15b rotates around the X-axis, and the fixed quantity coating head 22 rotates together with the linear guide member 16. Then, the X-axis direction movement of the quantitative coating head 22 and X
The rotation about the axis is combined so that the distance of fall of the coating material extruded from the ejection port 25a of the quantitative coating head 22 is always kept constant.

According to this embodiment, the quantitative coating head 22 can be moved via the linear guide member 16 and the rotating member 15 in response to irregularities on the substrate 11 in all directions, and the ejection port 25a and the substrate 11 can be coated. The distance between positions can always be kept constant. When the substrate 11 is moved, the substrate 11 and the ball bearing 28 of the constant distance holding member 25 are in rolling contact with each other, so that the contact area between the substrate 11 and the ball bearing 28 is reduced, and even minute irregularities on the substrate 11 are quantitatively applied. Head 2
2 can follow and move.

[0014]

Second Embodiment FIGS. 11 and 12 show a second embodiment of the present invention.
11 is a front view and FIG. 12 is a side view. In the coating device 40 of this embodiment, the DC servomotor 41 is fixed to the rotary member fixing plate 14 arranged in the same manner as in the first embodiment. Rotation shaft 41a of DC servo motor 41
Penetrates through the rotary member fixing plate 14 and projects to the surface opposite to the surface where the DC servo motor 41 is fixed. A convex rotary plate 43 is fixed to the tip of the rotary shaft 41a. A stage 44 having a U-shaped cross section is fixed to the rotary plate 43.

Two roller guides 45 are attached to the stage 44 in parallel with the quantitative coating head 22 and in an upright state in the Z-axis direction. A ball screw 46 is provided in the middle of the two roller guides 45 in parallel with the roller guide 45, and the upper end of the ball screw 46 is connected to a DC servo motor 47 fixed to the upper surface of the stage 44. .. A stage 48 provided on the quantitative coating head 22 is screwed onto the ball screw 46. The side surface of the stage 48 is slidably held by the two roller guides 45.

A pair of constant distance holding members 49 are fixed to the lower surface of the quantitative coating head 22 with the discharge port portion 24 interposed therebetween. A length measuring sensor including a light emitting element 50 and a light position detecting element 51 is attached to each of the pair of constant distance holding members 49 (see FIG. 13). That is, the light emitted from the light emitting element 50 is reflected by the coating surface of the object 11 and is received by the light position detecting element 51. As a result, the quantitative coating head 2
2 is configured to measure the distance between the coating surface of the coating object 11 and the inclination degree between the quantitative coating head 22 and the coating surface.

In the coating device 40 of the present embodiment, the control unit (not shown) controls the quantitative coating head 22 and the coating target 11 by the length measuring sensor which is the constant distance holding member 49 for the unevenness in the X-axis direction. The distance from the coating surface is measured to detect the difference from the initially set distance, and the DC servo motor 47 is rotated. As a result, the ball screw 46 rotates, and the quantitative coating head 22 moves to the initial set distance via the stage 48. On the other hand, with respect to the unevenness in the Y-axis direction, the degree of inclination between the quantitative coating head 22 and the coating object 11 is detected by the length measuring sensor which is each constant distance holding member 49, and the DC servo is performed by the detected value. The motor 41 is rotated, and the quantitative coating head 22 is rotated through the convex rotary plate 43 and the stage 44.
Rotate. As shown in FIG. 13, the measurement of the distance and the inclination degree is performed by irradiating from the light emitting element 50 the object to be coated 11
Measurement position of the light reflected by the coating surface 52 of the optical position detection element 5
This is performed by detecting the difference between the position detected by No. 1 and the position where the light position detecting element 51 should detect the light reflected by the initial setting position coating surface 53 of the coating object 11. Other functions are the same as those in the first embodiment.

According to the present embodiment, in addition to the effect of the first embodiment, since the quantitative coating head 22 can be moved to a predetermined position without coming into contact with the moving substrate 11, it is possible to cope with an elastic and soft substrate. A uniform film thickness can be applied to such a substrate.

[0019]

Third Embodiment FIGS. 14 and 15 show a third embodiment of the present invention.
14 is a perspective view and FIG. 15 is a plan view. The coating device 60 according to the present embodiment is provided with a fixed amount coating head 22.
Is attached to the linear guide member 16 so that it can be moved in the Z-axis direction while being guided by the dovetail groove 16b. A groove 51 is formed in the Z-axis direction at the center of the front surface of the quantitative coating head 22. The groove 51 is formed to have a wide inner portion and has a T-shaped cross section. A bolt 52 having a T-shaped head corresponding to the shape of the groove 51 is slidably mounted in the groove 51. The bolt 52 has two plates 53
Is rotatably attached through the end.

The two plates 53 are superposed and arranged so as to intersect with each other, and are fixedly and movably provided to the fixed quantity coating head 22 by a nut 54 screwed to the bolt 52 on the front surface of the plates 53. At the other end of each of the two plates 53, a constant distance holding member 65, which is separately arranged on both sides of the quantitative coating head 22, is rotatably attached via a screw 66. The constant distance holding member 25 has a through hole formed in the Y-axis direction. On the other hand, at the bottom of the quantitative coating head 22, Y
A long guide rod 67 is attached in the axial direction, the guide rod 67 is inserted into the through hole of the constant distance holding member 25, and the constant distance holding member 65 is held so as to be movable only in the Y-axis direction. Reference numeral 68 is a head for preventing the constant distance holding member 65 from coming off.

In the coating apparatus 60 of the present embodiment, when the nut 64 is loosened, the bolt 62 is guided by the groove 61 and moved in the Z-axis direction, a pair of constant distance holding members are provided via the two plates 63. 25 is guided by the guide rod 67 and moves in the Y-axis direction, and the distance between the pair of constant distance holding members 25 changes. That is, when the bolt 62 is moved toward the substrate 11, the distance between the constant distance holding members 25 is widened, and when the bolt 62 is moved away from the substrate 11, the constant distance holding member 25 is moved so as to be narrowed. And after the desired spacing is obtained,
The nut 64 is tightened and the two plates 63 are fixed to the fixed quantity coating head 22. Other functions are the same as those in the first embodiment.

According to the present embodiment, in addition to the effect of the first embodiment, when there is another pattern in the vicinity of the pattern of the substrate 11 and there is a risk that the constant distance holding member 25 and the other pattern come into contact with each other, By changing the distance between the constant distance holding members 25, the danger can be avoided and the target pattern can be applied.

[0023]

According to the present invention, even when a coating film having a wide film width is formed on an object to be coated having irregularities, the constant quantity coating head rotates with the linear member in correspondence with the state of irregularities. Since it is moved by the member, the interval between the quantitative coating head and the coating position of the coating object can be always kept constant, and a uniform coating film thickness can be obtained.

[Brief description of drawings]

FIG. 1 is a side view conceptually showing a coating apparatus of the present invention.

FIG. 2 is a front view conceptually showing the coating apparatus of the present invention.

FIG. 3 is a perspective view showing a coating device according to a first embodiment of the present invention.

FIG. 4 is a front view showing the coating apparatus according to the first embodiment of the present invention.

FIG. 5 is a side view showing the coating apparatus according to the first embodiment of the present invention.

FIG. 6 is a perspective view showing a rotating member.

FIG. 7 is a cross-sectional view showing a rotating member by cutting it out.

FIG. 8 is a perspective view showing a constant distance holding member.

FIG. 9 is a sectional view of a constant distance holding member.

FIG. 10 is a side view showing a modified example of the first embodiment.

FIG. 11 is a front view showing a coating device according to a second embodiment of the present invention.

FIG. 12 is a side view showing a coating apparatus according to a second embodiment of the present invention.

FIG. 13 is a view showing a main part of a constant distance holding member.

FIG. 14 is a perspective view showing a coating device according to a third embodiment of the present invention.

FIG. 15 is a plan view showing a coating device according to a third embodiment of the present invention.

[Explanation of symbols]

 1 coating object 2 fixed amount coating head 3 moving table 4 constant distance holding member 5 linear motion member 6 rotating member

Claims (1)

[Claims] 1. A quantitative coating head for continuously ejecting a coating material onto a coating object, a coating material quantitative supply device for feeding the coating material to the coating head, and a fixed coating object relative to the quantitative coating head. In a coating device including a moving table that moves at a constant speed, it is possible to move at least two constant distance holding members attached to the quantitative coating head and the quantitative coating head toward the coating surface of the coating object. And a rotating member that rotatably holds the fixed quantity coating head via the linear moving member.