TW201420207A - Apparatus for spreading paste - Google Patents

Abstract

It is inserted in the conduit line (312a), in which the glass paste is circulated and conduit line (312a) from the nozzle (31a), discharging the paste reservoir (30), moving below the glass paste applied to element side substrate and glass paste to the element side substrate and paste reservoir (30) to the nozzle (31a). Paste reservoir (30) do with the stirring mechanism (33) agitating the glass paste experiencing and circulates the conduit line (312a) to the apparatus for paste-coating in which the stirring mechanism (33) is movably inserted in the conduit line (312a).

Description

Paste coating device

The invention relates to a paste coating apparatus.

For example, a manufacturing process of a light-emitting panel such as an organic EL panel that emits an organic EL (Electro-Luminescence) element and displays an image or the like includes bonding a sealing glass substrate (sealing substrate) to a light-emitting element including an organic EL element or the like. The process of the glass substrate (component side substrate). In the process, a paste (glass paste) containing a glass frit for sealing a sealing substrate is applied to the element side substrate by a paste application device such as a dispenser.

In the prior art of the technical field, for example, Patent Document 1 discloses that "a screw having a spiral shape in the axial direction on the surface of the rod body, a rotary drive mechanism for rotating the screw, and a screw insertion are provided. a screw insertion hole, a main body portion having a liquid material supply flow path that communicates with a liquid material supply port and a liquid material supply port disposed on a side surface of the screw insertion hole, and a screw insertion hole for screw insertion The sealing member and the nozzle that is connected to the screw insertion hole of the main body portion are configured to have a liquid-proof space from the liquid material supply port of the screw insertion hole, and the screw is not wetted by the sealing member. The positive rotation is performed, and the liquid material is discharged from the nozzle to supply it (see summary).

[Patent Document 1] WO2008/126414

When a paste-like liquid material such as a glass paste is discharged from a nozzle and applied to the element-side substrate, a method of pushing the pressure in the nozzle by air pressure may be used. In such a liquid material (glass paste), fine solid particles such as glass frits are mixed, and when the solid particles (glass frit or the like) are aggregated, the thin tube portion such as a nozzle may be clogged.

Therefore, for the glass paste, it is required that the solid particles (glass frit, etc.) contained therein can be in a state of diffusion.

For example, when the glass paste is guided to the nozzle, the glass paste is stirred in the pipe to maintain the solid particles in a diffused state.

For example, as shown in the patent document 1, a pipe (liquid material supply flow path) for guiding the paste to the nozzle (liquid material supply port) is provided with a rotary screw, and the paste can be carried out in the pipe. Stir.

However, in the configuration described in Patent Document 1, the structure of the support screw and the configuration in which the screw is rotated are required, and the structure of the apparatus for applying the liquid material is complicated.

Further, an object of the present invention is to provide a paste application device which has a simple structure and can agitate a paste before being discharged from a nozzle.

The present invention for solving the problem is provided in a paste for agitating a liquid material in a line for allowing a liquid material to flow from a retention portion for retaining a paste-like liquid material applied to a substrate to a nozzle for discharging a liquid material. Material coating device. In addition, the agitating mechanism is characterized in that it can be combined in such a manner as to be movable on the pipe.

According to the present invention, it is possible to provide a paste application device which is simple in construction and which can agitate the paste before being discharged from the nozzle.

1‧‧‧Milk coating device

1a‧‧‧Rack (plane on which the substrate is placed)

2‧‧‧Workbench

3‧‧‧Injection head

10‧‧‧Component side substrate (substrate)

30‧‧‧Paste retention department (stagnation department)

31a‧‧‧Nozzles

31c‧‧‧ Sealing members

33‧‧‧Stirring mechanism (static mixer)

312‧‧‧ Arms

312a‧‧‧pipe

312a1‧‧‧ inner wall

312c‧‧‧ open end

Gp‧‧‧ glass paste (liquid material)

Fig. 1 is a perspective view of a paste application device according to an embodiment of the present invention.

Fig. 2(a) is a side view of the injection head, and Fig. 2(b) is a cross-sectional view showing the configuration of the nozzle holder.

Fig. 3 is a view showing an example of the elements constituting the stirring mechanism.

Fig. 4 is a cross-sectional view showing the arm portion in a state in which the sealing member is removed, (b) is a sectional view of the arm portion in a state in which the stirring mechanism is inserted, and (c) is a closed end of the pipe closed by a sealing member. A cross-sectional view of the arm portion of the state.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Moreover, in the following description, the organic EL panel is used as the light. One example of the panel, however, the present invention is also applicable to other light-emitting panels other than the organic EL panel. Other light-emitting panels other than organic EL panels, such as plasma displays, liquid crystal displays, and the like. The present invention is not limited to an organic EL panel, and can be widely applied to a light-emitting panel in which a glass frit contained in a glass paste is fired to fix two glass substrates.

[Examples]

Fig. 1 is a perspective view of a paste application device of the present embodiment, and Fig. 2 is a cross-sectional view showing a configuration of a nozzle holder, and Fig. 2(a) is a side view of the injection head.

As shown in Fig. 1, the paste application device 1 of the present embodiment has a table 2 on which a substrate (element-side substrate 10) such as a glass substrate on which the light-emitting surface 10a is formed is placed, and is placed on a table. The element side substrate 10 on the second surface is coated with a glass paste (liquid material) in a specific shape (coating pattern).

The element-side substrate 10 is, for example, an element constituting an organic EL panel, and the light-emitting surface 10a is a surface on which a circuit including an organic EL element (not shown) is disposed. In the circuit including the organic EL elements, the light emission of the organic EL elements is controlled by a control unit (not shown).

The structure of the table 2 is disposed on the gantry 1a of the paste application device 1, and the moving devices 2a and 2b are movable on the plane of the gantry 1a in two directions of intersection.

That is, the gantry 1a of the paste application device 1 of the present embodiment is for placing the plane of the element side substrate 10.

In the gantry 1a, the two directions in which the table 2 is moved are set as the coordinate axes of the X-axis and the Y-axis, and the configuration of the table 2 is moved in the X-axis direction (X-axis direction) by the moving device 2a. The moving device 2b is moved in the direction of the Y-axis (Y-axis direction).

Further, the configuration of the mobile device 2a is preferably provided with a sensor (a position detecting sensor or the like) for detecting the distance moved by the table 2 in the X-axis direction, and the configuration of the mobile device 2b is provided to It is preferable to detect a sensor (a position detecting sensor or the like) that moves the table 2 in the Y-axis direction.

Further, the paste application device 1 includes an injection head 3 that applies a glass paste from the upper side to the element side substrate 10 placed on the table 2. The injection head 3 is attached to a bracket 4 that is placed above the gantry 1a, and is coated on the table 2a that moves in two directions (X-axis direction, Y-axis direction) on the lower gantry 1a. Paste.

In addition, the first embodiment is a paste application device 1 including one injection head 3. However, the paste application device 1 having two or more injection heads 3 may be used.

Further, in the present embodiment, the table 2 is moved on the gantry 1a by the moving devices 2a and 2b, and the holder 4 to which the injection head 3 is attached is fixed to the gantry 1a.

In such a configuration, the component side substrate 10 placed on the table 2 can be moved relative to the injection head 3 by the movement of the table 2 by the moving devices 2a and 2b.

That is, the mobile devices 2a, 2b have the component side substrate 10 and the bet The function of the head 3 to move relatively.

In addition to such a configuration, the injection head 3 and the holder 4 may be moved in the X-axis direction and the Y-axis direction. Alternatively, the table 2 may be moved in one of the X-axis direction and the Y-axis direction, and the injection head 3 (bracket 4) may be moved in the other of the X-axis direction and the Y-axis direction.

In either configuration, the injection head 3 and the table 2 (the element side substrate 10) can be relatively moved.

The paste application device 1 is controlled by the control device 5. The control device 5 controls the mobile devices 2a and 2b to appropriately move the table 2. Further, the control device 5 controls the injection head 3 to perform ON/OFF of coating of the glass paste.

Further, the control device 5 controls the mobile devices 2a and 2b so that the table 2 can be moved to an arbitrary position by taking the moving distance of the table 2 in the X-axis direction and the Y-axis direction by the sensor.

In the paste application device 1 having such a configuration, the glass paste is applied to the element side substrate 10 placed on the table 2 by the injection head 3.

The element-side substrate 10 on which the light-emitting surface 10a is formed in the previous process is transported to the paste application device 1 by the transport means 20.

Further, the shape of the element side substrate 10 (the shape of the light emitting surface 10a) is not limited to a rectangular shape.

For example, the element-side substrate 10 (light-emitting surface 10a) having a circular or elliptical shape may be used, or the element-side substrate 10 having an n-angle (n is a natural number of 3 or more) may be used.

Further, the transport means 20, for example, as shown in Fig. 1, is only The transport belt may be transported, or the transport robot may be transported, and the configuration of the transport means 20 is not limited.

As shown in FIG. 1, the component side substrate 10 conveyed by the conveyance means 20 to the paste application apparatus 1 is moderately placed and fixed to the table 2. The configuration in which the element side substrate 10 is fixed to the table 2 is not limited. For example, the configuration may be such that the element-side substrate 10 is attracted and fixed from the table 2 side.

When the component side substrate 10 is placed (fixed) on the table 2, the control device 5 controls the moving devices 2a and 2b to move the table 2, and moves the element side substrate 10 to a specific application start position. The coating start position is preferably set at a specific position where the glass paste is applied by the injection head 3, and is preferably set appropriately. Further, the control device 5 moves the table 2 while applying the glass paste from the injection head 3, and applies the glass paste to the element side substrate 10 so as to draw a specific coating pattern.

Further, the paste application device 1 preferably includes a position determining means for moving the element-side substrate 10 placed on the stage 2 to a specific reference position.

The composition of the location decision means is not limited. For example, the reference point (G1, G2) previously marked on the element side substrate 10 can be read by a video recognition camera or the like so that the read reference points G1 and G2 are positioned at a specific position, and can be moved by the control device 5. The composition of the workbench 2. In this manner, the reference points G1 and G2 of the mark are located at the position of the element side substrate 10 at a specific position, which is the reference position of the element side substrate 10.

Further, for example, two or more references are marked on the element side substrate 10 The points G1 and G2 are configured such that the table 2 can be rotated in parallel with the plane of the gantry 1a, and the control device 5 can rotate the table 2 so that all of the reference points G1 and G2 are positioned at specific positions. Thereby, one side of the rectangular light-emitting surface 10a can be parallel to the coordinate axis (X-axis, Y-axis) set on the gantry 1a.

Further, the control device 5 can appropriately move the table 2 in the X-axis direction and the Y-axis direction, and apply a glass paste around the light-emitting surface 10a.

Further, the injection head 3 is attached to the holder 4 so as to be movable up and down, and the injection head 3 may be provided to measure the distance between the element side substrate 10 and the nozzle 31a (see FIG. 2(b)). The configuration of a sensor (optical displacement meter using laser light, etc.).

With such a configuration, the control device 5 can measure the distance between the nozzle 31a and the element side substrate 10 when applying the glass paste. Further, the control device 5 maintains the nozzle 31a and the element side substrate 10 at a proper distance by the upper and lower movement of the injection head 3.

Fig. 2(a) is a side view of the injection head, and Fig. 2(b) is a cross-sectional view showing the configuration of the nozzle holder.

As shown in Fig. 2(a), the injection head 3 of the present embodiment includes a retention portion (paste retention portion 30) composed of a hollow cylinder for retaining the glass paste, and The nozzle holder 31 is attached to one end of the paste retention portion 30. Further, the paste accumulation portion 30 is provided with an air pressurizing portion 32 at the other end facing the one end of the nozzle holder 31.

In the paste accumulation portion 30, the glass paste applied to the element side substrate 10 (see FIG. 1) is retained, and the air holding portion 32 is applied to the paste retention portion 30. When the inside is pressurized, the glass paste is pushed out from the paste accumulation portion 30 to the nozzle holder 31, and is discharged from the nozzle 31a provided in the nozzle holder 31.

For example, the air pressurizing unit 32 may be configured to push compressed air (or nitrogen gas) compressed by an air compressor (compressor) (not shown) into the interior of the paste retaining unit 30.

The injection head 3 is attached to the holder 4 (see Fig. 1) such that the axial direction of the paste retention portion 30 is in the vertical direction and the nozzle holder 31 is positioned below. In addition, the compressed air sent from the air pressurizing unit 32 is pushed out from the paste accumulating portion 30, and the glass paste discharged from the nozzle 31a is applied to the lower gantry 1a (see FIG. 1). The configuration of the element side substrate 10 (see Fig. 1).

As shown in FIG. 2(b), the nozzle holder 31 is configured to include a body portion 311 connected to one end of the paste retention portion 30 and an axial direction perpendicular to the paste retention portion 30. The arm portion 312 of the body portion 311 in the direction.

Further, the injection head 3 and the arm portion 312 are attached to the holder 4 so as to be parallel to the plane on which the gantry 1a (see Fig. 1) is formed (see Fig. 1).

Further, inside the body portion 311, a pipe 311a through which the glass paste flows is formed, and inside the arm portion 312, a pipe 312a through which the glass paste flows is formed. Further, the conduit 311a of the trunk portion 311 and the conduit 312a of the arm portion 312 communicate via the corner portion 313a.

The pipe 312a of the arm portion 312 is a pipe extending in the axial direction of the arm portion 312 to penetrate the front end portion 312b of the arm portion 312 (with the body) The end portion of the side opposite to the side of the portion 311 is configured. That is, the open end 312c of the conduit 312a is formed at the front end portion 312b. Further, at the front end portion 312b of the pipe 312a, a sealing member 31c for closing the open end 312c of the pipe 312a is fitted.

The sealing member 31c is preferably a detachable structure, for example, a screw member that can be screwed to a female screw formed on the side of the end portion 312b of the pipe 312a (the open end 312c of the pipe 312a).

Further, a sealing member (not shown) is disposed between the sealing member 31c and the front end portion 312b of the arm portion 312, and the configuration between the sealing member 31c and the tip end portion 312b is preferably sealed.

Further, a nozzle 31a is attached to the arm portion 312. In the nozzle 31a, when the injection head 3 is attached to the holder 4 shown in Fig. 1, the injection head 3 is mounted in a direction in which the glass paste is discharged downward.

For example, when the injection head 3 is mounted so that the axial direction of the paste accumulation portion 30 is the vertical direction, the nozzle 31a is installed such that the axial direction thereof is parallel to the axial direction of the paste accumulation portion 30 and the opening is formed downward. Further, the nozzle 31a is in communication with the pipe 312a of the arm portion 312.

When the injection head 3 is configured as shown in (a) and (b) of FIG. 2, when the compressed air sent from the air pressurizing unit 32 pressurizes the inside of the paste retaining portion 30, the glass paste, It is pushed from the paste accumulation portion 30 to the nozzle holder 31, and flows through the conduit 311a of the trunk portion 311. Further, the glass paste flows through the tube 312a of the arm portion 312 via the corner portion 313a, and is discharged from the nozzle 31a.

Further, in the paste application device 1 of the present embodiment (refer to Fig. 1), A stirring mechanism 33 is incorporated in the pipe 312a of the arm portion 312 of the nozzle holder 31.

The stirring mechanism 33 preferably has, for example, a wing-like member that functions to swirl the glass paste flowing along the pipe 312a in the circumferential direction of the inner wall 312a1 of the pipe 312a.

Fig. 3 is a view showing an example of the elements constituting the stirring mechanism.

For example, as shown in FIG. 3, the stirring mechanism 33 is provided with a plurality of in-line shapes to the glass paste Gp, as viewed from the upstream of the flow of the glass paste Gp of the pipe 312a. The right assembly 33a of the rightward direction of the inner wall 312a1 and the static mixer of the left assembly 33b which imparts the leftward direction of the inner wall 312a1 of the pipe 312a to the glass paste Gp are preferred.

As shown in Fig. 3, the glass paste Gp of the pipe 312a in which the stirring mechanism 33 (static mixer) is disposed in the axial direction is swirled by the stirring mechanism 33 in the circumferential direction of the inner wall 312a1 of the pipe 312a. Stir in the same way. Therefore, the solid particles such as the glass frit contained in the glass paste Gp are maintained in a diffused state, and are prevented from becoming a block.

Further, the shapes of the right unit 33a and the left unit 33b shown in FIG. 3 are exemplified for explaining the function of the stirring mechanism 33, and the shape of the stirring mechanism 33 (static mixer) is not limited.

Fig. 4, (a) to (c) are diagrams showing a step of assembling a stirring mechanism to a pipe of the arm portion.

As shown in Fig. 4(a), the pipe 312a of the arm portion 312 penetrates the front end portion 312b, and the pipe portion 312a is opened at the front end portion 312b. End 312c. Therefore, when the sealing member 31c is removed, the front end portion 312b side of the pipe 312a is in an open state.

Further, by using the screw member as the sealing member 31c, the configuration of the arm portion 312 can be easily removed.

Further, for example, as shown in Fig. 4(b), the stirring mechanism 33 easily forms the open end 312c of the opening from the pipe 312a and enters the inside of the pipe 312a. That is, the operator who assembles the stirring mechanism 33 can easily insert the stirring mechanism 33 into the conduit 312a from the open end 312c of the front end portion 312b.

Thereafter, as shown in Fig. 4(c), when the sealing member 31c is assembled to the front end portion 312b of the arm portion 312, the open end 312c of the pipe 312a is closed, and the stirring mechanism 33 is sealed in the pipe 312a. It is assembled in the line 312a.

Further, the agitation mechanism 33 is assembled while being inserted from the open end 312c of the duct 312a, and is restrained by the inner wall 312a1 of the duct 312a and other mechanisms and structures. Thereby, the agitation mechanism 33 is assembled so as to be freely movable (movable) in the pipe 312a.

In other words, the configuration of the duct 312a can be a simple configuration of a mechanism and a structure that do not need to support the stirring mechanism 33.

Further, as shown in FIG. 2(b), a corner portion 313a is formed on the side of the body portion 311 of the duct 312a, and is bent toward the paste accumulation portion 30 side. Therefore, the agitation mechanism 33 in the pipe 312a of the arm portion 312 can only move to the position of the corner portion 313a without the pipe from the arm portion 312. 312a moves to other parts.

In this manner, the agitation mechanism 33 can be assembled to the conduit 312a of the arm portion 312 with extremely easy work.

In addition, the paste application device 1 (see Fig. 1) of the present embodiment is an air pressurizing unit 32 (see Fig. 2(a)) provided in the paste retaining portion 30 (see Fig. 2 (refer to Fig. 2). a)) The paste retention portion 30 is pressurized to push out the glass paste Gp (see Fig. 3), and is discharged from the nozzle 31a of the arm portion 312 (see Fig. 2(b)).

When the air pressurizing unit 32 pressurizes the paste accumulating portion 30, the pipe 312a of the arm portion 312 (see FIG. 2(b)) is pressurized from the corner portion 313a side, and the stirring mechanism 33 (refer to Fig. 2(b)) is pushed toward the sealing member 31c (see Fig. 2(b)). When the stirring mechanism 33 is pushed to the sealing member 31c to suppress the rotation, the rotation of the stirring mechanism 33 when the glass paste Gp flows through the pipe 312a is suppressed, and the stirring mechanism 33 can effectively stir the glass paste Gp.

As described above, the paste application device 1 (see FIG. 1) of the present embodiment is a pipe that flows through the glass paste Gp (see FIG. 3) applied to the element side substrate 10 (see FIG. 1). 312a (refer to Fig. 2(b)), a stirring mechanism 33 such as a static mixer is incorporated (see Fig. 2(b)). In addition, the glass paste Gp is allowed to flow to the nozzle 31a (see FIG. 2(b)), and can be discharged from the nozzle 31a and applied to the element side substrate 10. Therefore, the solid particles such as the glass frit contained in the glass paste Gp can maintain the diffusion state, and it is possible to suppress the solid particles of the glass frit from blocking the thin tube portion of the nozzle 31a or the like.

Further, by using the static mixer as the stirring mechanism 33, the glass paste Gp can be stirred in a very simple configuration without a power source other than the compressed air for driving the stirring mechanism 33.

Further, it is easy for the operator to assemble the stirring mechanism 33 to the pipe 312a of the arm portion 312 (see FIG. 2(b)), and it is easy to manage the operator of the paste application device 1 or the like. The stirring mechanism 33 is assembled.

Further, the stirring mechanism 33 of the present embodiment (see (b) of FIG. 2, static mixer, etc.) is an arm portion 312 which is assembled to the gantry 1a (see FIG. 1) of the parallel paste application device 1. The line 312a (refer to (b) of Fig. 2).

Further, when the paste application device 1 is provided such that the gantry 1a is substantially horizontal, the arm portion 312 extends in a substantially horizontal direction, and the glass paste Gp (see FIG. 3) flowing through the pipe 312a is substantially horizontal. Circulation.

Therefore, the glass paste Gp which is swung in the circumferential direction of the inner wall 312a1 (see FIG. 3) of the pipe 312a by the stirring mechanism 33 of the pipe 312a of the arm part 312 is stirred in the up-down direction. Thereby, the glass paste Gp which is easy to form a bulk glass frit due to precipitation or the like is appropriately stirred, and the glass frit is maintained in a good diffusion state.

Moreover, the invention is not limited to the embodiment and the modifications. For example, the embodiments are described in detail for the purpose of facilitating the understanding of the present invention, and are not necessarily required to be all described.

Further, a part of the configuration of the embodiment may be replaced with a configuration of another embodiment, and a configuration of another embodiment may be added to the configuration of the embodiment.

For example, the stirring mechanism 33 (refer to (b) of Fig. 2) is not limited to a static mixer. For example, the elongated flat plate may also be a member that is twisted in one direction. At this time, the glass paste Gp (refer to FIG. 3) which flows through the pipe 312a of the arm part 312 (refer FIG. 2 (b)), and flows in the one direction rotation. When viewed from the upstream side, the diffusion effect of the solid particles contained in the glass paste Gp is small compared to the case of swirling in the left and right directions. However, the effect of diffusing the solid particles can be obtained. Further, the stirring mechanism 33 can be constituted by a relatively inexpensive member as compared with the static mixer.

Further, the glass paste Gp (see FIG. 3) having the pipe 312a (see FIG. 2(b)) flowing through the arm portion 312 may be provided along the inner wall 312a1 (refer to FIG. 2 (refer to FIG. 2 (refer to FIG. 2) b)) The plurality of wing members that function in the circumferential direction are inserted into the stirring mechanism 33 of the line 312a (see Fig. 2(b)).

3‧‧‧Injection head

32‧‧‧Air pressurization department

30‧‧‧Paste retention department (stagnation department)

31‧‧‧ nozzle holder

311‧‧‧ Body Department

312‧‧‧ Arms

31a‧‧‧Nozzles

31c‧‧‧ Sealing members

312b‧‧‧ front end

311a‧‧‧pipe

313a‧‧ Corner

312a1‧‧‧ inner wall

312a‧‧‧pipe

33‧‧‧Stirring mechanism (static mixer)

312c‧‧‧ open end

Claims (5)

A paste coating device comprising: a retention portion for retaining a paste-like liquid material applied to a substrate; a nozzle for discharging the liquid material toward the substrate; and a conduit for supplying the liquid material The retention portion flows to the nozzle; and a stirring mechanism is coupled to the conduit for agitating the liquid material flowing through the conduit; the agitation mechanism is movably coupled to the conduit. The paste application device according to claim 1, wherein the agitation mechanism is in a state of being inserted into the pipe from an open end of the pipe, and the open end is closed by a detachable sealing member. The paste application device according to claim 1, wherein the pipe is configured such that the liquid material flows substantially parallel to a plane on which the substrate is placed, and the stirring mechanism has a stirring mechanism The liquid material is rotated along the circumferential direction of the inner wall of the pipe. A paste coating device as described in claim 1, wherein The agitation mechanism is a static mixer. The paste application device according to claim 3, wherein the agitation mechanism is a static mixer.