JP2007021415A - Coating tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating tool which has high static accuracy and high dynamic accuracy by achieving both of weight reduction and high damping property and by which stable coating work can be carried out even when a member to be coated increases in size in the coating tool in which a coating liquid is circulated in a groove-shaped slot and then is ejected from a top end of a coating head. <P>SOLUTION: The coating tool has a coating head 10 constituted of a plurality of head members 16, 18, the groove-shaped slot 14 opened at a top end of the coating head 10 is formed between fellow flanks facing each other in a plurality of head members 16, 18 and the coating liquid is circulated in the slot 14 and then is ejected from the top end of the coating head 10. In the coating tool, the slot 14 is equipped with a top end part made of a hard alloy and at least a part of the head members 16, 18 is formed of a carbon fiber-reinforced plastic and further a wear resistance treated layer is provided at a surface with which the coating liquid comes into contact. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a coating tool for coating a coating liquid on the surface of a member to be coated such as a sheet-shaped member or a panel-shaped member.

2. Description of the Related Art Conventionally, a coating tool having a slot through which a coating liquid is passed as a coating tool mounted on a coating apparatus that performs a coating operation to form a coating film layer by thinly and uniformly coating a coating liquid on the surface of a sheet-like member Is used. As such an application tool, there is an application head 1 as shown in FIG. 7, and the application head 1 is a sheet-like member (applied member) S that travels in a traveling direction indicated by an arrow A in the drawing. The sheet-like member S is formed in a long shape extending in the width direction, and is disposed under the sheet-like member S so that the front end portion thereof faces upward and can be slidably contacted with the sheet-like member S. (For example, refer to Patent Document 1.)
JP 62-241574 A (FIG. 1)

Further, as shown in FIG. 8, the tip of the coating head 1 faces downward, is positioned above the panel-like member P, brings the coating head 1 close to the panel-like member P, and is the direction indicated by the arrow B in the figure. What is moved to is also used.
These coating heads 1 define the slots 4 by arranging the side surfaces 2a, 3a of the pair of head members 2, 3 with a certain gap, and are directed in the longitudinal direction of the side surfaces 2a, 3a. The recessed grooves 5 and 6 formed in this way define the pocket 7. The slot 4 is opened at the front end surface of the coating head 1, and a supply port (not shown) for supplying the coating liquid is provided in communication with the center of the pocket 7. And in order to form the space | interval of the slot 4 with high precision, the finishing process is given to the side surfaces 2a and 3a by the polishing process. 7 and 8, the slot 4 and the pocket 7 are open to the side of the coating head 1, but the ends of the slot 4 and the pocket 7 are sealed. The coating liquid supplied from the supply port in the coating operation spreads in the longitudinal direction of the coating head 1 by filling the pocket 7, passes through the slot 4, and is discharged from the tip of the coating head 1. The discharged coating liquid is applied to the surface (lower surface) of the sheet-like member S that moves relative to the coating head 1 or the panel-like member P to form a coating layer.

In order to form a stable coating layer on the member to be coated, it is necessary to stably form the coating liquid in the coating operation. For this reason, the coating tool is applied while improving the static accuracy of the coating tool. In order to stably attach the apparatus to the apparatus, the setup change is facilitated by reducing the weight of the coating head 1 and the mounting accuracy during setup change has been improved.
Specifically, the coating head constituting the coating tool is made of a material having a low density such as Al or Ti, thereby reducing the weight of the coating head. The precision has been improved and the coating operation has been stabilized.

  However, in order to form a stable coating layer on the member to be coated in the coating operation, in addition to giving the coating head high static accuracy, dynamic by suppressing external influences such as vibration in the coating operation. The accuracy needs to be improved, especially as the coating head increases in size with the increase in the size of the member to be coated in recent years, and the static accuracy decreases due to the influence of temperature changes and deflection due to the increase in the weight of the coating head. The decrease in dynamic accuracy due to vibration during coating operation has greatly affected the quality of the coating layer, and there has been a need to improve static accuracy and dynamic accuracy more than ever.

  The present invention has been made in consideration of such circumstances, and has high static accuracy and dynamic accuracy by achieving both weight reduction and high vibration damping properties, and is stable even when the coated member is enlarged. An object of the present invention is to provide an application tool capable of performing an application operation.

In order to solve the above problems, the present invention proposes the following means.
The invention according to claim 1 has a coating head composed of a plurality of head members, and a groove-like slot that opens at the tip of the coating head is provided between the mutually facing side surfaces of the plurality of head members. A coating tool in which the coating liquid is circulated through the slot and discharged from the tip of the coating head, the slot having a tip made of cemented carbide, and the head member is at least partially Is formed of a fiber reinforced plastic reinforced with fibers.

According to the coating tool according to the present invention, since a part of the head member constituting the coating head is formed of fiber reinforced plastic (hereinafter referred to as FRP) reinforced with fibers, the mechanical strength is high and the weight is light. Therefore, static accuracy can be increased and deformation such as bending is unlikely to occur. Further, the coefficient of thermal expansion is small, and the dimensional change with respect to the temperature change is suppressed.
In addition, since the tip end portion of the slot made of cemented carbide extends in the longitudinal direction at least in the range in which the coating liquid circulates, the tip end portion extends in the longitudinal direction of the coating head, so that the cemented carbide is obtained. Due to the high rigidity and light weight of the FRP, the bending of the coating head is sufficiently suppressed, so that handling work such as setup change is facilitated, and when the coated member is in the form of a sheet, the tip portion that contacts the coated member Hardness is high and shape change is suppressed.

  In addition, since FRP has good vibration damping properties, vibration generated in the coating operation is suppressed in a short time, and a stable coating film can be formed.

  A second aspect of the present invention is the coating tool according to the first aspect, wherein the fibers are carbon fibers.

Since the coating tool according to the present invention is formed of carbon fiber reinforced plastic (hereinafter referred to as CFRP) in which a part of the head member is reinforced with carbon fibers, it is compared with FRP reinforced with fibers other than carbon fibers. Therefore, the mechanical strength and the creep property are good, and the deformation of the coating head over time is suppressed.
CFRP has a linear expansion coefficient as small as −1.0 to 1.0 μm / m · K, and the thermal expansion coefficient may be set to approximately zero μm / m · K by arranging carbon fibers orthogonally. Even if there is a temperature change or local temperature variation in the coating head, there is almost no dimensional deformation, so that high static accuracy can be maintained.
Further, since the vibration damping property is very good, even if vibration occurs due to scanning of the coating head or sudden braking during coating work, good dynamic accuracy can be maintained.
As a result, a stable coating layer can be formed immediately after the start of coating and over the coating end position.

  According to a third aspect of the present invention, there is provided the coating tool according to the first or second aspect, wherein the head member is provided with a wear-resistant treatment layer at least on a surface in contact with the coating liquid.

  Since the coating tool according to the present invention is provided with the anti-wear layer on the surface in contact with the coating liquid, it is possible to prevent the inclusions in the coating liquid from piercing the surface in contact with the coating liquid, and to improve the accuracy of the cleaning operation and the coating head. Easy to maintain, improving productivity and tool life.

  According to the coating tool according to the present invention, the static accuracy and dynamic accuracy of the coating tool are improved by suppressing the influence of the deflection and temperature change accompanying the increase in size and vibration during the coating operation. A stable coating operation corresponding to the increase in size of the member can be performed.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a view of a coating head 10 according to a first embodiment used for a coating tool as viewed from the longitudinal direction, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a cross-sectional view taken along a line CC in FIG. FIG. 4 is a perspective view showing the first embodiment.

  This coating head 10 defines a slot 14 by arranging opposing side surfaces (hereinafter referred to as slot surfaces) 17, 19 of a pair of head members 16, 18 with a certain gap. Is opened at the tip of the coating head 10. At the portion where the slot 14 of the head members 16 and 18 is opened, tip portions 17a and 19a made of cemented carbide are provided so as to protrude, and are applied by the tip surfaces 17e and 19e formed on the end surfaces of the tip portions 17a and 19a. The liquid is applied.

As shown in FIG. 3, the head members 16 and 18 are coupled by the coupling bolts 12 so that the mating surfaces 16 s and 18 s that are inner surfaces located on the proximal side from the groove 11 are in close contact with each other. A semicircular groove 11 formed in the slot surface 17 in the longitudinal direction forms a pocket 15.
The pocket 15 is provided with a supply port (not shown) for supplying a coating liquid, and the slot 14 and the pocket 15 are open to the side of the coating head 10 in FIG. The ends of the slot 14 and the pocket 15 are sealed.

The head members 16 and 18 include first structures 16a and 18a formed of stainless steel and second structures 16b and 18b formed of carbon fiber reinforced plastic. 16b and 18b are fixed to a recess formed on the back surface (the surface opposite to the surface on which the slot surfaces 17 and 19 are formed) of the first structures 16a and 18a by bonding or screws (not shown). Has been.
The CFRP in this embodiment is composed of an epoxy resin reinforced with carbon fibers of so-called UD materials arranged without cutting the long fibers of carbon fibers, and has a density of 1.53 to 1.73 g / cm ³ and linear expansion. The coefficient is −1.0 to 1.0 μm / m · K.

A method for using the coating tool including the coating head 10 will be described.
The coating tool provided with the coating head 10 is mounted on a coating apparatus and used for coating work.
In the coating operation, the coating liquid is supplied from the coating device, and the coating liquid fills the pocket 15 and spreads in the longitudinal direction of the coating head 10, passes through the slot 14, and is the tip of the coating head 10, that is, the open end of the slot 14. Is applied to the sheet-like member S (see FIG. 7) or the panel-like member P (see FIG. 8) which moves relative to the slot front end surfaces 17e and 19e of the coating head 10.

  In the coating head 10 of this embodiment, since the back surfaces of the head members 16 and 18 are the second structures 16b and 18b made of CFRP, they are lightweight and have high mechanical strength. Deformation such as bending is unlikely to occur, and since the coefficient of thermal expansion is small, a decrease in dimensional accuracy is suppressed even if a dimensional change or local temperature variation occurs due to a temperature change.

In addition, CFRP has good creep properties in addition to mechanical strength, so that deformation of the coating head over time is suppressed.
As described above, high static accuracy can be ensured, and handling work such as setup change is facilitated by weight reduction.
Moreover, since the front-end | tip parts 17a and 19a are formed with the cemented carbide, it can suppress that the front-end | tip parts 17e and 19e are damaged with the content of a coating liquid.
In addition, CFRP has good vibration damping properties, so that vibrations caused by scanning and sudden braking during application work can be suppressed in a short time, maintaining good dynamic accuracy, and performing appropriate application work. Can do.

FIG. 5 is a view showing a coating head 10 according to the second embodiment of the present invention. In the second embodiment, the same reference numerals are used for the same parts as in the first embodiment, and the description thereof is omitted.
In the second embodiment, the head members 16 and 18 are, for example, first structures 16a and 18a formed of stainless steel, third structures 16c and 18c, and a second structure formed of CFRP. Body 16b, 18b, as shown in FIG. 5, arranged so that the second structure 16b, 18b is sandwiched between the first structure 16a, 18a and the third structure 16c, 18c, It is fixed.
According to the coating head 10 of the second embodiment, the structure is simple, and sufficient weight reduction and mechanical strength (rigidity) can be provided.
Further, since the weight of the coating head 10 is reduced, the rigidity of the coating device on which the coating head 10 is mounted can be designed to be low, and a small motor can be used as a driving unit for driving the coating head 10. Can do. That is, even if the coating head 10 is increased in size, the increase in the size of the coating apparatus can be suppressed, and the cost can be reduced.

FIG. 6 is a view showing a coating head 10 according to a third embodiment of the present invention. In the third embodiment, the same reference numerals are used for the same parts as those in the first embodiment, and the description thereof is omitted.
In the third embodiment, the head member 16 includes a first structure 16a formed of stainless steel and a second structure 16b formed of CFRP. The first structure 16a is The slot surface 17 and the concave groove 11 are provided, and the slot surface 17 and the concave groove 11 are attached and fixed to a concave portion formed in the second structure 16b by a fixing means (not shown) such as adhesion or a screw. In addition, the head member 18 has a main portion other than the tip end portion 19a formed of CFRP.
The head member 16 includes, for example, a hard chrome plating (abrasion-resistant layer) 20 on the mating surface 16s located on the head member 18 side of the second structure 16b, and the head member 18 is a surface that contacts the coating liquid ( For example, a hard chrome plating 20 is provided on the surface 18f of the head member 18 on the side of the head member 16 excluding the surface constituted by the mating surface 18s and the tip 19a and the mating surface 18s.

  In this embodiment, since the concave groove 11 is formed in the first structure 16a, the processing is easy, and the hard chromium plating 20 is provided on the mating surfaces 16s and 18s and the surface 18f with which the coating liquid comes into contact. As a result, these surfaces can be mirror-finished, and the flow of the coating liquid can be made smooth, thereby improving the wear resistance.

  In the above embodiment, the case where the CFRP constituting the head members 16 and 18 uses an epoxy resin reinforced with carbon fibers of a UD material has been described. It may be constituted by a composite of cloth material, and the plastic constituting the FRP or CFRP is not limited to an epoxy resin, and a thermosetting resin such as an unsaturated polyester resin or a phenol resin may be used.

  Moreover, as a structure which comprises all or one part of the head members 16 and 18, you may use FRP comprised by fibers other than carbon fiber, About the form of the fiber in that case, and a thermosetting resin As in the case of CFRP, it can be freely selected within a range not departing from the gist of the present invention.

In the above embodiment, the case where the hard chrome plating 20 is provided on the surface 18f and the mating surfaces 16s and 18s in contact with the coating liquid has been described. However, the hard chrome plating layer 20 is provided only on the surface 18f in contact with the coating liquid. Also good.
Moreover, materials other than hard chrome plating can be used for the material of the abrasion-resistant treatment layer 20, and other means such as thermal spraying can be used as the treatment method.

In the above-described embodiment, the case where there are two head members has been described. However, an application head having two or more slots may be configured using three or more head members.
Further, the member to be coated is not limited to the sheet-like member S, and the present invention may be used for a coating tool for applying a coating liquid to a panel-like member such as an electronic substrate, and the sheet-like member in a fixed state. Alternatively, the application tool may move with respect to the panel-like member.

It is a side view of the coating head which comprises the coating tool in the 1st Embodiment of this invention. It is a left view of the application head shown in FIG. It is CC sectional drawing of the coating head shown in FIG. It is a perspective view of the coating head which comprises the coating tool in the 1st Embodiment of this invention. It is a perspective view of the coating head which comprises the coating tool in the 2nd Embodiment of this invention. It is a perspective view of the coating head which comprises the coating tool in the 3rd Embodiment of this invention. It is a perspective view of the coating head which comprises the conventional coating tool. It is a perspective view of the coating head which comprises the conventional coating tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coating head 11 Concave groove 14 Slot 15 Pocket 16, 18 Head member 18f The surface which a coating liquid contacts 17, 19 Slot surface 17a, 19a Tip part 20 Hard chromium plating (Abrasion-resistant process layer)

Claims (3)

A plurality of head members each having a coating head, a groove-like slot opening at a tip of the coating head is defined between the mutually facing side surfaces of the plurality of head members; An application tool that circulates in the slot and is discharged from the tip of the application head,
The slot comprises a tip made of cemented carbide;
An application tool, wherein the head member is formed of a fiber reinforced plastic at least partially reinforced with fibers. The application tool according to claim 1,
An application tool, wherein the fibers are carbon fibers. The application tool according to claim 1 or 2,
The coating tool according to claim 1, wherein the head member includes a wear-resistant layer on at least a surface in contact with the coating solution.

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