JPH11207237A - Coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously apply two or more coating agents to the surface of a substrate in stripes and apply the coating agents in a flat and even thickness in the width direction of the substrate and also in the even thickness in the whole length along the longitudinal direction. SOLUTION: This coater carries out coating of the surface of a continuously supplied substrate 2 with coating agents in stripes by discharging the coating agents through discharging outlets formed on a coater head. In this case, the coater head 11 comprises an upper part head block 20 and a lower part head block 19 and is constituted by fastening and joining both head blocks 19, 20. Discharge grooves 33, 53 opened at the tip of the coater head to form discharge outlets and communicated with coating agent supply inlets 21, 22 are formed in the face contacting at least one of the upper part head block 20 and the lower part head block 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for coating one or more kinds of coating agents, for example, on a surface of a base material which is continuously supplied at a constant speed, through a discharge port formed in a coater head. The present invention also relates to a coating apparatus for discharging a coating agent such as an adhesive or a non-adhesive and applying the coating in a stripe shape on the surface of a base material.

[0002]

2. Description of the Related Art Heretofore, some articles which are subjected to coating processing, such as adhesive products, are subjected to partial coating depending on the application. For example, as shown in FIG. 15, a cover tape 106 described in Japanese Utility Model Laid-Open Publication No.
8 and 108, and the non-adhesive resin portion 1 is provided between the adhesive portions.
No. 09 is disclosed in a striped form so as to have substantially the same thickness. Note that FIG.
Medium, 200 is a carrier tape, 201 is a chip body 105
A concave portion forming a housing portion 202 for housing the hole 203 is a feed hole.

[0003] As a method of forming a coating agent such as an adhesive on the surface of such a base material in the form of a stripe, conventionally,
The following various methods have been proposed. As a conventional method using a die coater, as shown in FIG. 16, a plurality of shielding plates 302 are sandwiched between the discharge ports 301 of the die coater 300, and the discharge ports separated by a predetermined distance in the width direction of the base material. 30
3, a method of applying a coating material introduced from a coating material supply port on the surface of the base material through these discharge ports 303 in a stripe shape is performed.

Japanese Patent Application Laid-Open No. 9-220503 discloses a die coater in which protrusions projecting downward from an upper lip of a discharge port of a die coater are provided at regular intervals so as to change the vertical gap between the discharge ports and to provide a base material. In order to adjust the distance between the light and dark stripes on the surface of the base material, the coating material is discharged using this die coater by providing a concave portion that is recessed toward the base material in the upper lip part with a certain distance between them. Is disclosed.

Japanese Patent Laid-Open Publication No. Hei 8-99056 discloses that a die coater is divided into a front block and a back block so that the front block projects toward the base material with respect to the back block. A slit is provided in the contact surface of the back block to form a flow path of the coating agent, and the coating agent is discharged through a rectangular discharge port formed in the surface of the back block, and a uniform film is formed on the surface of the base material. A method of applying a stripe-shaped coating film with a thickness and a line width is disclosed.

Further, when the adhesive is applied, if the coating agent is applied linearly to the surface of the base material using a discharge nozzle having a perfect circular cross section, the discharge amount at the center of the discharge nozzle is reduced. Being larger than the periphery, an uneven coating film with a raised center is formed, the thickness of this coating film is not constant in the width direction, and when the coating film is used as an adhesive layer, for example,
The joint is only at the top end, and the adhesive strength is weakened. For this reason, Japanese Patent Application Laid-Open No. H08-112563 discloses a nozzle in which the shape of a discharge port formed in a width direction of a substrate at a predetermined interval in a coater head is flat and has a long axis in the width direction of the substrate. There has been proposed a method of forming a coating material so that a coating agent can be applied in a flat and uniform thickness in a width direction and a longitudinal direction of a base material.

[0007]

However, when two or more different layers are formed on a single base material by applying a coating agent separately on a single substrate as in the prior art, two or more types of apparatuses or coating apparatuses are used. In the method of forming using a process, a large number of coating apparatuses are required, and it is necessary to repeat complicated processes, which results in poor productivity and high cost. Further, in the case where coating is to be performed in one process using such a large number of coating apparatuses, it is difficult to precisely arrange the installation positions of these apparatuses, which is difficult.

In the case of using a conventional die coater with a shielding plate interposed therebetween, it is impossible to simultaneously apply two or more types of coating agents since there is only one channel and one outlet. In addition, since the shielding plate is present, it is impossible to apply another type of coating agent in the width direction of the base material without any gap in a stripe shape.

Further, in the method disclosed in Japanese Patent Application Laid-Open No. Hei 9-220503, it is impossible to apply two or more kinds of coating agents at the same time because there is only one channel and one outlet. Further, a convex portion or a concave portion must be formed on the upper lip portion, and forming such a complicated portion on the lip portion with high accuracy requires a complicated operation and requires an expensive apparatus. In addition, in this method, since a coating film having a light and shade is intended, the coating film does not have a uniform thickness. For example, when the coating film is applied to a cover tape as described above, the film is uniformly wound into a roll. It is difficult to do so, and it may cause collapse during transport or use.

In the method disclosed in Japanese Patent Application Laid-Open No. Hei 8-99056, although it is possible to apply two or more kinds of coating agents, it is difficult to accurately form a rectangular discharge port on the surface of the back block, resulting in high cost. Become.

Furthermore, in the method disclosed in Japanese Patent Application Laid-Open No. HEI 8-112563, it is necessary to form a tubular nozzle having a flat cross section in the coater head. However, forming such a nozzle requires a very precise and complicated operation. Necessary and costly. Further, since the nozzle is a tubular nozzle, it is difficult to make the cross section flat and the rectangular shape is difficult. Therefore, even with this method, there is still room for improvement in the flatness of the coating film cross section.

In any of the methods, when the coating material is supplied from the coating material supply port by the pressure feeding device, the pressure loss is small at the coating material supply port side, and increases as the distance from the coating material supply port increases. However, at each discharge port, the pressure of the coating agent becomes non-uniform, and as a result, the coating thickness becomes non-uniform, which causes poor winding.

Further, in any of the methods, in the case of a coating material having a low viscosity, the discharge amount at the center of the discharge port is larger than that at the periphery thereof, and a mountain-shaped (non-flat) coating film having a cross section with a raised center is formed. As a result, the thickness of the coating film is not constant in the width direction.

In the case where the die coater, the coater head and the like are removed for cleaning for maintenance or for changing the type of product, any of the above-mentioned methods is a component having a complicated shape. A specially shaped brush or the like is required, and the cleaning work is complicated.

Further, when it is necessary to change the stripe width, the stripe position, the number of coating agents, and the like depending on the type of the product, the conventional method separately prepares the die coater and the coater head according to the product specifications. It had to be replaced with a new one, and other types of die coaters and coater heads were required, resulting in high costs.

According to the present invention, in view of such a situation, two or more kinds of coating agents can be simultaneously coated on the surface of the substrate in a stripe shape, and the thickness of the substrate is flat and uniform in the width direction. It is another object of the present invention to provide a coating apparatus which can apply a coating material to a uniform thickness over its entire length even in the length direction.

Further, according to the present invention, the stripe width, the stripe position, the number and the type of the coating agent, etc. can be easily changed according to the type of the product. It is another object of the present invention to provide an inexpensive coating apparatus that can be easily cleaned without requiring a special tool even when the coater head is removed for cleaning, and has a simple structure, is easy to manufacture, and is inexpensive.

[0018]

Means for Solving the Problems The present invention has been made to achieve the above-mentioned objects and objects, and the coating apparatus of the present invention is provided on the surface of a continuously supplied base material. An application device that applies an application agent in a stripe form to the surface of a substrate by discharging the application agent through an ejection port formed in the coater head, wherein the coater head includes an upper head block and a lower head block. It is configured by tightening and connecting both head blocks, at least one of the contact surfaces of the upper head block and the lower head block,
A discharge groove communicating with the coating material supply port and opening to the tip of the coater head to form a discharge port is provided.

According to this structure, the discharge port can be formed only by forming the discharge groove on at least one of the contact surfaces of the upper head block and the lower head block. The coating agent can be accurately applied to the surface in a stripe shape in one step. Further, even when the coater head is removed for cleaning for maintenance or for changing the type of product, cleaning can be easily performed without requiring special tools. Further, by variously combining the upper head block and the lower head block, the stripe width, the stripe position, the number and type of the coating agent, and the like can be easily changed according to the type of the product.

Further, in the coating apparatus of the present invention, the discharge groove is provided on each of the contact surfaces of the upper head block and the lower head block, and each of the discharge grooves supplies a different coating material. It is characterized in that it is configured to communicate with the supply port.

This makes it possible to simultaneously apply the two types of coating agents to the surface of the base material accurately and in a stripe form. Further, the coating apparatus of the present invention is provided with a plurality of discharge grooves provided on the upper head block and a plurality of discharge grooves provided on the contact surface of the lower head block, each of which is arranged in a line in the width direction of the base material. It is characterized in that they are provided at predetermined intervals and shifted from each other in the width direction of the base material.

Thus, the two kinds of coating agents can be simultaneously applied to the surface of the base material in a striped manner at a predetermined interval. Further, in the coating apparatus of the present invention, an intermediate head block is sandwiched between the upper head block and the lower head block, and a contact surface of the intermediate head block with the upper head block and a contact surface with the lower head block. At least one of the contact surfaces is provided with a third discharge groove communicating with the third coating material supply port and opening to the tip of the coater head to form a discharge port. Features.

With this configuration, it is possible to simultaneously apply at least three or more types of coating agents on the surface of the base material accurately and in a striped form, and to form an upper head block, a lower head block, and an intermediate head. By variously changing and combining the blocks, it is possible to easily change the stripe width, the stripe position, the number and type of the coating agent, and the like according to the type of the product.

Furthermore, the coating apparatus of the present invention is characterized in that a plurality of intermediate head blocks are sandwiched between the upper head block and the lower head block. This makes it possible to simultaneously apply another type of coating agent on the surface of the base material accurately and in a stripe form, and to increase the variation of the stripe form application by the number of combinations of the intermediate head blocks.

Further, in the coating apparatus of the present invention, the shape of the discharge port formed by the discharge groove is rectangular. As a result, unlike a conventional circular discharge port, the discharge amount at the center is larger than that at the periphery thereof, and a mountain-shaped (non-flat) cross-section with a raised center is not formed. The coating agent can be applied to a flat and uniform thickness in the width direction, and to a uniform thickness over the entire length even in the length direction.

Furthermore, in the coating apparatus of the present invention, the shape of the discharge port formed by the discharge groove is such that the dimension in the substrate supply direction near both ends in the width direction of the substrate is the base of the intermediate portion of the discharge port. It is characterized in that it is formed to be larger than the dimension in the material supply direction.

According to this, depending on the conditions such as the viscosity of the coating agent, the discharge amount at the center becomes larger than that at the periphery thereof, and the formation of a coating film having a mountain-like (uneven) cross section with a raised center is formed. Because it can be corrected based on the analysis, it is possible to apply the coating material to a flat and uniform thickness in the width direction of the base material, and to a uniform thickness along the entire length even in the length direction. it can.

Further, in the coating apparatus of the present invention, the discharge groove provided in the upper head block, the discharge groove provided in the lower head block, and the discharge groove provided in the intermediate head block are positioned in the width direction of the base material. Are shifted from each other.

Thus, a plurality of coating agents can be applied in a stripe shape without overlapping the surface of the substrate. Furthermore, in the coating apparatus of the present invention, at least one of the coater heads includes a liquid reservoir in which the coating material supplied from the coating material supply port stays and supplies the coating material to the discharge groove at a uniform pressure. It is characterized by having two back blocks.

Thus, since the coating agent supplied from the coating agent supply port is supplied to each of the discharge grooves at a uniform supply pressure through the liquid reservoir, a stripe-shaped coating with a uniform coating thickness can be performed. Becomes

In the coating apparatus according to the present invention, the coater head may further include a gravity adjusting unit configured to supply the coating agent supplied from the coating agent supply port to the discharge groove at a uniform pressure by the action of gravity. It is characterized by having at least one front block provided.

With this configuration, the coating agent supplied from the coating agent supply port passes through the gravity adjusting section, is adjusted by the action of gravity, and is supplied to each discharge groove at a uniform supply pressure. Therefore, a stripe-shaped coating having a uniform coating thickness can be performed.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments (examples) of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a coater head portion of the coating apparatus of the present invention, and FIG.
Is a schematic perspective view showing only the coater head portion and omitting other components, FIG. 3 is an enlarged cross-sectional view of the coater head of the coating apparatus of the present invention, FIG. FIG.
Is a cross-sectional view taken along the line BB of FIG. 3, and FIG. 6 is a schematic diagram of the entire coating apparatus.

FIGS. 1 to 6 show a first embodiment of a coating apparatus according to the present invention. In this embodiment, two kinds of coating agents are applied on the surface of one substrate in the width direction of the substrate. Alternately applied, for example, an optimal example of using an adhesive layer and a non-adhesive layer with a substantially uniform thickness, and forming them linearly along the length direction of the substrate. Is shown.

That is, as shown in FIG. 2 and FIG. 6, the tape-shaped base material 2 wound around the unwinder 1 is continuously conveyed at a constant speed with the rotation of the backup roll 3. After passing through the inside, it is wound up by the rewinder 5. During this transportation, a plurality of stripe-shaped adhesive layers 6 are formed on the surface of the substrate 2.
And the non-adhesive layer 7 sandwiched between the adhesive layers 6 are simultaneously formed.

In the embodiment shown in FIG. 6, by using the base material subjected to the peeling treatment on the back surface of the base material 2, when the rewinder 5 winds the base material 2, the surface subjected to the peeling treatment is applied. The adhesive layer 6 is located on the surface side of the base material located inside.
In addition to preventing the non-adhesive layer 7 from being exposed on the surface, the base material 2 can be used while being easily peeled off. However, as shown by a two-dot chain line in FIG. 6, the release sheet 9 wound around the unwinder 8 may be wound around the rewinder 5 'while being attached to the application surface side of the base material 2.

As shown in FIG. 1, the backup roll 3 is disposed rotatably in the direction of arrow a, and the substrate is supplied (runs) in the direction of arrow a with the driving of the backup roll 3. Has become. And 10 indicates the coater head of the coating apparatus of the present invention as a whole,
The coater head unit 10 includes a coater head main body 11 disposed so as to face the backup roll 3, and the coater head main body 11 extends along the axial direction of the backup roll 3.

The coater head main body 11 is detachably fixed to the upper surface of the support base 12 by a fixing device (not shown).
The support table 12 can be adjusted toward and away from the back-up roll 3 along a rail 14 provided on a fixed base 13 by an adjustment mechanism (not shown). Thereby, the coater head main body 11 can adjust the gap between the lip portion 15 provided at the tip of the coater head main body 11 and the base material 2 supported by the backup roll 3. .

As shown in FIGS. 3 to 5, the coater head main body 11 is divided into a plurality of blocks made of metal such as stainless steel such as SUS304, for example. , It is configured to be tightly connected.

That is, the coater head main body 11 includes a first back block 16 having an application agent supply port for connecting to a supply tank containing an application agent and a pressure feeding device (not shown), and a first back block. A second back block 17 disposed in front of the block 16, a front block 18 disposed in front of the second back block, and a lower head block 1 disposed on an upper surface of the front block 18;
9 and an upper head block 20 arranged on the upper surface of the lower head block 19. The contact surfaces between the blocks are provided with a sealing function so that the smoothness of the surfaces is increased, and the application agent is supplied in a tightly connected state so that the application agent does not leak from the contact surfaces. ing.

The first back block 16 is provided with a first coating agent supply port 21 and a second coating agent supply port 22 on the back surface 16a thereof, which are vertically separated from each other.
Separate coating agents, for example, a first coating agent supply port 21 is connected to a supply tank for storing an adhesive, and a second coating agent supply port 22 is connected to a supply tank for storing a non-adhesive.

Then, the first coating agent supply port 21 is
As shown in FIG. 5, the front surface of the first back block 16, that is, the second
And a liquid reservoir 24 provided on the contact surface 16b with the back block 17.

As shown in FIG. 5, the liquid reservoir 24 extends on the contact surface 16b of the first back block 16 in the width direction of the base material, and is formed of one tubular first member.
The coating agent supplied through the coating agent supply port 21 of the above-described method becomes a uniform pressure in the width direction of the substrate as a whole, and the pressure concentrated at the position of the coating agent supply port 21 where the direct current flows is introduced. This is for supplying the coating material to the holes 25 at a uniform supply pressure.

That is, as shown in FIGS. 3 and 5, the liquid pool 24 is formed on the back of the second back block 17,
That is, the contact surface 17a with the first back block 16
A plurality of which are formed at regular intervals in the longitudinal direction,
In this embodiment, the coating material is configured so as to communicate with a total of six introduction holes 25, 25, and passes through the liquid reservoir 24, so that the coating agent has a uniform pressure in the width direction of the base material as a whole. Are introduced at uniform supply pressures into the respective introduction holes 25, 25.
It is supplied to.

The introduction holes 25, 25 are formed on the front surface of the second back block 17, that is, the front block 18, through a coating agent supply passage 26 formed in the front and rear direction inside the second back block 17. Contact surface 17b
Is connected to the liquid reservoir 27 provided at the bottom.

In this case, as shown in FIG. 5, the first coating material supply port 21 and the introduction hole 25, that is, the coating material supply passage 26, are positioned so that their positions do not coincide with each other. It is formed shifted in the direction. That is, if the first coating material supply port 21, the coating material supply passage 23, and the coating material supply passage 26 are in a straight line, the first
The coating agent supplied through the coating agent supply port 21 flows through these paths, and the supply pressure concentrates. Thus, the coating agent supply passage 26 which is in a straight line and the supply passage which is not in a straight line This is to prevent a difference in the supply pressure from being generated between the pressure supply and the pressure sensor 26, which is not preferable. In the present embodiment, the number of the coating agent supply passages 26 is six.
This number and the arrangement position can be appropriately changed.

As shown in FIG. 5, the liquid pool 27 extends on the contact surface 17b of the second back block 17 in the width direction of the base material, similarly to the liquid pool 24 described above. The coating agent supplied through the coating agent supply passage 26 is provided with a more uniform pressure as a whole, so that the coating agent is supplied to an introduction hole 28 described later at a uniform supply pressure. is there.

That is, as shown in FIGS. 3 and 5, the liquid reservoir 27 is fixed on the back surface of the front block 18, that is, on the contact surface 18a with the second back block 17, in the width direction of the base material. It is configured so as to communicate with a plurality of introduction holes 28, 28 formed at a distance from each other. Are supplied to the respective introduction holes 28, 28. Each of the introduction holes 28 is electrically connected without branching to a discharge port 34 described later.

In this case, for the same reason as described above, as shown in FIG. 5, the coating material supply passage 26 and the introduction hole 28 are shifted in the width direction of the base material so that their positions do not coincide with each other. This is configured to prevent a difference in supply pressure from occurring.

Each of the introduction holes 28 communicates with an application agent supply passage 29 formed in the front block 18 in the front-rear direction.
The front end of 9 is branched upward to form a gravity adjustment passage 31 constituting a gravity adjustment unit 30. This gravity adjustment passage 3
Numerals 1 each communicate with a gravity adjustment passage 32 formed corresponding to the gravity adjustment passage 31 so as to penetrate the lower head block 19 in the vertical direction. The gravity adjusting passage 31 and the gravity adjusting passage 32 constitute a gravity adjusting unit 30.

The gravity adjusting section 30 is provided in the coating agent supply passage 2.
The supply pressure of the coating agent supplied to each of the coating agents 9 is adjusted by the action of gravity by passing through the gravity adjustment unit 30, and becomes a uniform supply pressure in all the coating agent supply passages 29. This is for supplying the coating material to the first ejection groove 33 of the head block 20.

In the present embodiment, the gravity adjusting section 30 and the gravity adjusting passage 31 and the gravity adjusting passage 32 are provided substantially vertically upward. However, as long as a gravitational action is expected, the gravity adjusting section 30 is provided obliquely upward. Of course, it may be possible.

The upper ends of the gravity adjusting passages 32 are respectively shown in FIG.
4, the lower surface of the upper head block 20, that is, the contact surface 20 with the lower head block 19.
a, a first discharge groove 33 formed to extend in the front-rear direction.
It is constituted so that it may communicate with. This first discharge groove 3
The front end of No. 3, that is, the end on the side of the base material 2 is open to the lip 15 to form a first discharge port 34.

As shown in FIGS. 7 and 8, the first discharge ports 34 have a substantially rectangular shape, and are provided at regular intervals in the width direction of the base material of the upper head block 20. I have. In this way, by making the shape substantially rectangular, the discharge amount at the center becomes larger than that at the periphery thereof, as in a conventional circular discharge port, and the coating film having a mountain-like (non-flat) cross section with a raised center is formed. It is not formed, and the coating material can be applied in a flat and uniform thickness in the width direction of the base material and in a uniform thickness over the entire length even in the length direction.

In FIGS. 4 and 5, for convenience of explanation,
Coating agent supply passage 29, gravity adjuster 30, first discharge groove 3
3. The discharge ports 34 and the like are indicated by solid lines and dotted lines only at both ends of the coater head main body 11, and are omitted between them, but a plurality of these are provided at regular intervals in the longitudinal direction of the coater head main body 11. Have been.

Although the detailed description is omitted because it is substantially the same as the above description, the coating agent supply passage 43 formed in the first back block 16 and the second coating agent supply port 22 are formed in the same manner. The liquid reservoir 44 is in communication with a coating agent supply passage 46 and a liquid reservoir 47 formed in the second back block 17 via the liquid reservoir 44. Further, the liquid pool 4
Numeral 7 is formed in the front block 18 and has a front end portion located forward of the coating material supply passage 29 described above. The coating material supply passage 49 branches upward from the coating material supply passage to form a gravity adjusting unit 50. Through a gravity adjustment passage 51 and a gravity adjustment passage 52 formed in the lower head block 19, it communicates with a second discharge groove 53 formed on the upper surface 19 a of the lower head block 19. And this second
The front end of the discharge groove 53 is opened to the lip 15 to form a second discharge port 54.

The dimensions of the first discharge port 34 and the second discharge port 54 are not particularly limited, and the width of the intended coating layer, for example, the adhesive layer 6, What is necessary is just to set suitably according to the width | variety of the non-sticking agent layer 7, the kind, density | concentration, viscosity of a coating agent, the coating speed of a coating device, the capacity of supply pressure, etc.

The arrangement positions and the number of the first discharge ports 34 and the second discharge ports 54 may be determined according to the stripe shape, the base material width, and the like of the target product. As shown in FIG. 2, the adhesive layer 6 and the non-adhesive layer 7
When the cover tape is to be prepared by alternately applying the same to the surface of the base material in the width direction of the base material, as shown in FIG. The positions of both ends of the second discharge port 54 may be substantially matched in the width direction of the substrate 2.

Further, as shown in FIG. 10, the shape of the first discharge port 34 and the second discharge port 54 is such that the dimensions in the substrate supply direction near both ends 34a and 34b in the width direction of the substrate 2 are provided. It is preferable that the protrusions 34c and 34d are formed such that L ′ is larger than the dimension L of the intermediate portion of the discharge port in the substrate supply direction. Due to this, depending on conditions such as the viscosity of the coating material, the discharge amount at the center becomes larger than that at the periphery,
The formation of a coating film with a cross section with a bulged center (unevenness) can be corrected based on flow analysis, so that the base material is more flat and uniform in the width direction, and has a lengthwise direction. The coating agent can be applied to a uniform thickness over the entire length of the coating material. In this figure, for convenience of explanation, only the first discharge port 34 is shown, but the same applies to the second discharge port 54.

In this embodiment, a first back block 16 and a second back block 17 are provided, and two liquid pools 2 are provided for the coating material supply ports 21 and 22, respectively.
4 and 27, and the liquid reservoirs 44 and 47 are provided.
It is also possible to use one liquid reservoir. It is also possible to use three or more back blocks and three or more liquid reservoirs for the coating material supply port. Further, it is of course possible to provide a plurality of front blocks 18 and provide a plurality of gravity adjusters.

Further, in the present embodiment, the liquid pool 24,
Although both the 27, 44, 47 and the gravity adjusters 30, 50 are provided, it is also possible to provide only one of the liquid reservoir and the gravity adjuster so that a uniform supply pressure can be obtained.

In the present embodiment, two types of coating agents are discharged from the coating agent supply ports 21 and 22 through the discharge ports 34 and 54. However, as shown in FIG. Coating agent supply port, discharge port, in the figure, coating agent supply port 2
1. Of course, it is also possible to apply one kind of coating agent on the surface of the base material 2 in a stripe shape as the discharge port 34.

A 25 μm-thick polyethylene terephthalate film having one surface subjected to a release treatment was used as the base material 2, and an acrylic adhesive having a concentration of 35% and a viscosity of 1000 cps was used as a first coating agent (adhesive). Is used as a second coating agent (non-sticking agent) at a concentration of 40% and a viscosity of 1500 cps.
After forming a 20 μm-thick adhesive layer 6 and a non-adhesive layer 7 on one side of the base material 2 by using the polyester resin of the above, the center of the adhesive layer 6 in the width direction is cut. When the tape having the adhesive layer 6 is formed on both sides of the non-adhesive layer 7 by cutting with a machine, the carrier cover tape,
An adhesive strength of 20 g can be obtained, which value is EIAJ
It is confirmed that stable adhesive strength can be obtained within the standard (10 to 70 g).

FIG. 12 is a partially enlarged view showing only a lip portion showing a second embodiment of the coating apparatus of the present invention. In this embodiment, the basic configuration of the apparatus is the same as that of the coating apparatus of the first embodiment, and a detailed description thereof will be omitted.

This embodiment shows a coating apparatus capable of coating three kinds of coating agents in a stripe shape.
Unlike the first embodiment, the intermediate head block 60 is located between the upper head block 20 and the lower head block 19.
Is sandwiched.

That is, the upper surface of the intermediate head block, that is, the contact surface 60 a with the upper head block 20.
Then, a third discharge groove 63 is formed, and a third discharge port 64 is formed at the lip portion 15 so as to communicate with a third application agent supply port (not shown).

The ejection grooves 33 provided in the upper head block 20 and the ejection grooves 5 provided in the lower head block 19
3, and a discharge groove 63 provided in the intermediate head block 60
Are provided at positions shifted from each other in the width direction of the base material 2,
A plurality of coating agents are applied in a stripe shape without overlapping the surface of the base material.

In this case, as shown in FIG.
The lower surface of the intermediate head block 60, that is, the contact surface 19b with the lower head block 19 is also provided on the fourth ejection groove 6.
The discharge port 64 'may be formed by providing 3'.

With this configuration, it is possible to simultaneously apply at least three or more types of coating agents on the surface of the base material accurately and in a stripe shape, and to form the upper head block 20, the lower head block 19, and the By variously changing and combining the intermediate head block 60, the stripe width,
The stripe position, the number and type of the coating agent can be easily changed, and the variation can be expanded.

Further, as shown in FIG. 14, an intermediate head block 70 different from the intermediate head block 60 is provided between the upper head block 20 and the lower head block 19.
May be inserted. That is, a plurality of intermediate head blocks can be sandwiched between the upper head block 20 and the lower head block 19.

In this way, more kinds of coating agents can be simultaneously and accurately applied to the surface of the base material in the form of stripes, and the number of combinations of the intermediate head blocks can be increased in the number of stripe-shaped coating variations. .

In the above embodiment, the ejection grooves are shifted from each other so as not to overlap in the width direction of the base material. However, depending on the product, it is necessary to partially overlap the coating agent. In some cases, the discharge ports may of course be overlapped in the width direction of the base material.

In the above-described embodiment, only one coater head 10 is provided so as to face the backup roll. However, although not shown, a plurality of coater heads may be provided in accordance with the width of the base material. Alternatively, the positions may be shifted in the running direction of the base material, and they may be arranged in a line in the width direction of the base material so as not to overlap each other. Further, when it is necessary to partially overlap the coating agent depending on the product, the coating agents may be arranged so as to overlap in the width direction of the base material.

[0074]

According to the coating apparatus of the present invention, the discharge port can be formed only by forming the discharge groove on at least one of the contact surfaces of the upper head block and the lower head block. The coating agent can be accurately applied in a stripe to the surface of the substrate in one step. Further, even when the coater head is removed for cleaning for maintenance or for changing the type of product, cleaning can be easily performed without requiring special tools. Further, by variously combining the upper head block and the lower head block, the stripe width, the stripe position, the number and type of the coating agent, and the like can be easily changed according to the type of the product.

Further, in the coating apparatus of the present invention, since the intermediate head block is sandwiched between the upper head block and the lower head block, and the third discharge groove for forming the discharge port is provided, at least the third discharge groove is provided. It is possible to simultaneously apply three or more kinds of coating agents on the surface of the base material accurately and in a striped form, and by combining these upper head block, lower head block, and intermediate head block with various changes, the product Depending on the type, the stripe width, stripe position, number and type of coating agent, etc. can be easily changed.

Further, in the coating apparatus of the present invention, since the shape of the discharge port formed by the discharge groove is rectangular,
As with the conventional circular discharge port, the discharge amount at the center is larger than that around it, and a cross-section mountain-shaped (uneven) coating with a raised center is not formed in the width direction of the base material. The coating agent can be applied with a flat and uniform thickness and a uniform thickness over its entire length even in the longitudinal direction.

Further, the shape of the discharge port is formed such that the dimension in the substrate supply direction near both ends in the width direction of the substrate is larger than the dimension in the substrate supply direction at the middle portion of the discharge port. The formation of such a coating film having a cross-section with a bulged center (non-flat) can be corrected based on flow analysis, depending on conditions such as the viscosity of the coating agent. The coating agent can be applied in a flat and uniform thickness in the width direction, and in a uniform thickness over the entire length even in the length direction.

Further, in the coating apparatus of the present invention, at least one back block having a liquid pool portion and at least one front block having a gravity adjusting portion for supplying a coating material to the discharge groove at a uniform pressure by the action of gravity. Since either or both of them are provided, the coating material supplied from the coating material supply port is supplied to the gravity adjusting unit at a uniform supply pressure through the liquid reservoir, and passes through the gravity adjusting unit. Since the liquid is supplied at a uniform supply pressure from each of the discharge grooves, a stripe-shaped coating with a more uniform coating thickness can be performed.

Therefore, according to the coating apparatus of the present invention, in the field where precise and uniform stripe coating is required, for example, for accommodating small electronic parts such as semiconductor chips, resistors and capacitors. A cover tape for a carrier tape and a color filter for a liquid crystal display device (LCD) as shown in FIG. 15 can be manufactured easily, with good quality and at low cost.
This is an extremely excellent invention which has many functions and effects such as providing a product which can be wound up uniformly in a roll.

[Brief description of the drawings]

FIG. 1 is a side view showing a coater head portion of a coating apparatus according to the present invention.

FIG. 2 is a schematic perspective view showing only a coater head portion and omitting other components.

FIG. 3 is an enlarged sectional view of a coater head of the coating apparatus of the present invention.

FIG. 4 is a view in the direction of arrow A in FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a schematic diagram of the entire coating apparatus.

FIG. 7 is a partially enlarged view of a lip portion of a coater head of the coating apparatus according to the present invention.

FIG. 8 is a partially enlarged view showing a shape of a discharge port of a lip portion of a coater head of the coating apparatus of the present invention.

FIG. 9 is a partially enlarged view showing another embodiment of the lip portion of the coater head of the coating apparatus of the present invention.

FIG. 10 is a partially enlarged view showing another shape of the discharge port of the lip portion of the coater head of the coating apparatus of the present invention.

FIG. 11 is a partially enlarged view showing another embodiment of the lip portion of the coater head of the coating apparatus of the present invention.

FIG. 12 is a partially enlarged view showing only a lip portion of a coating apparatus according to a second embodiment of the present invention.

FIG. 13 is a partially enlarged view showing another embodiment of the lip portion of the coater head of the coating apparatus of the present invention.

FIG. 14 is a partially enlarged view showing another embodiment of the lip portion of the coater head of the coating apparatus of the present invention.

FIG. 15 is a partial cross-sectional perspective view showing a state where a chip body is packed using a conventional tape carrier system.

FIG. 16 is a partially enlarged view of a die coater head showing a method of forming a coating material in a stripe shape on the surface of a base material using a conventional die coater.

[Explanation of symbols]

 2 Base material 6 Adhesive layer 7 Non-adhesive layer 10 Coater head portion 11 Coater head body 15 Lip portion 16 , 17 ... Back block 18 ... Front block 19 ... Lower head block 20 ... Upper head block 21, 22 ... Coating agent supply port 24, 27, 44, 47 ··· Liquid pool parts 30, 50 ··· Gravity adjusting parts 31, 32, 51, 52 ··· Gravity adjusting passages 33, 53, 63, 63 '··· Discharge grooves 34, 54, 64, 64 '... Discharge port 60, 70 ... Intermediate head block

Claims (10)

[Claims] 1. A coating apparatus for discharging a coating material onto a surface of a continuously supplied base material through a discharge port formed in a coater head to apply the coating material in a stripe shape on the surface of the base material. The coater head includes an upper head block and a lower head block, and is configured by tightly connecting the two head blocks. At least one of the contact surfaces of the upper head block and the lower head block includes a coating agent. An application device, characterized in that an application groove is provided which communicates with a supply port and is opened at a tip of a coater head to form an ejection port. 2. The discharge groove is provided on each of the contact surfaces of the upper head block and the lower head block so that each of the discharge grooves communicates with an application agent supply port for supplying a separate application agent. 2. A structure according to claim 1, wherein
3. The coating device according to claim 1. 3. A plurality of discharge grooves provided on the upper head block and a plurality of discharge grooves provided on an abutting surface of the lower head block are respectively provided in a row in the width direction of the base material and separated by a predetermined distance. The coating apparatus according to claim 2, wherein the coating apparatuses are provided so as to be shifted from each other in a width direction of the base material. 4. An intermediate head block is sandwiched between the upper head block and the lower head block, and the intermediate head block has a contact surface with the upper head block and a contact surface with the lower head block. And a third discharge groove communicating with the third coating material supply port and opening at the tip of the coater head to form a discharge port is provided on at least one contact surface. Item 1
4. The coating device according to any one of claims 1 to 3. 5. The coating apparatus according to claim 4, wherein a plurality of intermediate head blocks are sandwiched between the upper head block and the lower head block. 6. The discharge port formed by the discharge groove has a rectangular shape.
The coating device according to any one of the above. 7. The shape of the discharge port formed by the discharge groove is such that the dimension in the substrate supply direction near both ends in the width direction of the substrate is larger than the dimension in the substrate supply direction of the middle part of the discharge port. 7. The image forming apparatus according to claim 6, wherein the size is increased.
3. The coating device according to claim 1. 8. A discharge groove provided in the upper head block, a discharge groove provided in the lower head block, and a discharge groove provided in the intermediate head block are provided at positions shifted from each other in a width direction of the base material. The coating device according to any one of claims 4 to 7, wherein 9. The coater head includes at least one back block provided with a liquid pool in which the coating material supplied from the coating material supply port stays and supplies the coating material to the discharge groove at a uniform pressure. The coating device according to any one of claims 1 to 8, wherein the coating device is provided. 10. The at least one front block, wherein the coater head is provided with a gravitational adjuster for applying the coating material supplied from the coating material supply port to the discharge groove at a uniform pressure by the action of gravity. The coating device according to any one of claims 1 to 9, further comprising: