JP2002263545A - Adhesive application method and adhesive application apparatus - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To easily and surely separate a yarn extending portion from a nozzle. SOLUTION: After a syringe 11 applies an adhesive 7 to a work 1, a separation operation is performed by a separation processing unit 21 so that the syringe 11 separates the adhesive 7. Separation processing unit 2
1 is that when the syringe 11 applies the adhesive 7 to the work 1, the syringe 4 is once raised, and a thread extension 7 a is generated at the top of the adhesive 7 with the rise of the nozzle 12. Lower it by a small distance to head to the work,
Thereafter, the syringe 11 is raised and returned to the original position, so that the thread extension 7a adheres to the adhesive 7 and is separated from the nozzle 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying an adhesive and a coating apparatus for performing the method.
Particularly, the present invention relates to a material suitable for using an adhesive having a relatively high clay content.

[0002]

2. Description of the Related Art For example, there is a case where a plastic plate and a printed board are bonded with an adhesive. In such a case, when bonding, conventionally, as shown in FIG. 6, the syringe 51 containing the adhesive is lowered toward the application point toward the plastic plate 53, and the adhesive 54 is discharged from the nozzle 52 of the syringe 51. A predetermined amount is applied. Then, after a predetermined amount of the adhesive 54 is applied to the plastic plate 53, a printed board (not shown) is placed thereon, so that the plastic plate 53 and the printed board can be bonded to each other.

[0003]

By the way, in the prior art described above, the adhesive 5 is placed on the plastic plate 53.
When applying No. 4, it is required to shorten the tact time required for the application. However, when applied using an adhesive having a relatively high viscosity, there were the following problems.

[0004] That is, after the adhesive 52 is applied to the plastic plate 53 by the nozzle 52 and the nozzle 52 is simply raised, as shown in FIG.
The upper portion of the adhesive 54 on the nozzle 3 remains attached to the nozzle 52, and a thread extending portion 54a extending in a thread shape is generated as the nozzle 52 rises. This thread extending portion 54a
However, even if the syringe 51 was raised, it only extended further, and could not be instantaneously separated from the nozzle 52. When the nozzle 52 is moved to the upper position, which is the original return position, the thread extending portion 54a of the adhesive 54 is
However, in this case, as shown in FIG. 7B, the thread extending portion 54a may fall by its own weight and protrude from the plastic plate 53, and may be shifted from a predetermined position.

Accordingly, the thread extending portion 54a is attached to the adhesive 54.
Is caused, there is a problem that the adhesive 54 cannot be applied to a desired position in a predetermined amount within a predetermined time. This problem does not occur if the viscosity of the adhesive 54 is low, but the adhesive 5 having a relatively high viscosity can be used.
4 is used.

[0006] The present invention has been made in view of the above circumstances, and even if a yarn extension portion occurs due to application of an adhesive,
It is an object of the present invention to provide a method for applying an adhesive which can easily and reliably separate the thread extending portion from a nozzle and apply the adhesive accurately and in a short time. An object of the present invention is to provide a device for applying the obtained adhesive.

[0007]

In order to solve the above problems, according to the present invention, a syringe containing an adhesive is moved toward an object to be coated, and the adhesive is applied onto the object from a nozzle of the syringe. The method for applying an adhesive according to the present invention is characterized in that the method includes a step of separating the tip of the adhesive from the nozzle when the adhesive is applied to the object to be coated by the nozzle of the syringe. As described above, when the syringe has applied the adhesive from the nozzle, there is a separation step of separating the thread extension of the adhesive from the adhesive, so that the thread extension generated in the adhesive can be separated from the nozzle of the syringe. it can.

Further, in the present invention, in the separating step, the syringe is once retracted from the object to be coated, moved again by a predetermined amount toward the object to be coated, and then returned to the original position. I do. In this manner, the syringe is once retracted from the object to be coated, then moved forward again, and then returned to the original position, so that the thread extension of the adhesive can be reliably separated from the nozzle of the syringe. In addition, when the thread extension is cut off from the nozzle of the syringe, the thread extension is separated by attaching the adhesive to the adhesive, so that the thread extension does not fall down to a position distant from the adhesive. It does not protrude from the coating.

According to the present invention, there is provided a syringe for storing and discharging the adhesive, a moving body for moving the syringe forward and backward with respect to the object to be coated, and a control device for controlling the movement of the syringe via the moving body. In the adhesive coating apparatus in which the syringe is moved toward the object to be coated and the adhesive is applied to the object from the nozzle of the syringe, the controller applies the adhesive to the object to be coated by the syringe. In this case, there is provided a separation processing section for moving the syringe so as to separate the adhesive from the nozzle of the syringe. As described above, since the control device has the separation processing unit that moves the syringe so that the adhesive is separated from the nozzle of the syringe when the syringe applies the adhesive, the application method described above can be accurately performed. Can be.

Further, the disconnection processing means is characterized in that when the syringe has applied the adhesive, the syringe is continuously moved backward, forward and return to the original position. As described above, when the syringe is applied, the backward movement, the forward movement, and the return movement to the original position of the syringe are continuously performed, so that the thread extension can be reliably separated in a short time. In addition, the separation step can be performed accurately and quickly.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 is a plan view showing a main part of an automatic assembling apparatus to which an embodiment of a coating apparatus for carrying out the method of the present invention is applied, FIGS. 2 and 3 are side views and perspective views showing the coating apparatus, and FIG. FIG. 5 is an explanatory view showing a moving state at the time of applying the syringe, and FIG. 5 is an explanatory view showing a state of the applied adhesive. Coating apparatus 10 for carrying out the method of the present invention
Is installed at a coating station of the automatic assembling apparatus 2. As shown in FIG. 1 can be applied.

Before describing the coating apparatus 10, the automatic assembling apparatus 2 will be described with reference to FIG. 1. The automatic assembling apparatus 2 has a disk-shaped carrier 3 rotatable about a central axis. ing. The carrier 3 is not shown in detail, but is rotated to rotate the work set portion 4 on the outer peripheral side.
Is positioned at the supply station, the work 1 is supplied to the work setting section 4 by the work supply mechanism 5, and then the work set section 4 is rotated in the direction of the arrow to position the work set section 4 at the coating station.
The adhesive is applied by the application device 10 on the work 1 inside. The work supply mechanism 5 is installed at a supply station, and when the work set part 4 of the carrier 3 is positioned, supplies and sets the work 1 in the work set part 4. The coating device 10 is installed in a coating station, and performs a coating operation when the work set unit 4 of the carrier 3 is positioned, which will be described later.

When the transfer body 3 is further rotated from the coating station and the work 1 in the work setting section 4 is positioned at the second supply position, the second work (not shown) is moved by the second work supply mechanism 6. The work 1 and the second work are bonded to each other by the adhesive on the work 1 by being supplied onto the work 1. That is,
When the carrier 3 sequentially rotates at a predetermined angle around the central axis, the automatic assembling apparatus 2 receives the work 1, applies an adhesive to the work 1, and applies the work 1 to the work set unit 4 of the carrier 3. Adhesion with the second work is automatically performed. In this example, the work 1 as an object to be coated is formed of a plastic plate, the second work is formed of a printed board, and the plastic plate and the printed board are finally bonded.

The coating apparatus 10 is roughly composed of a syringe 11 for storing and discharging an adhesive, and a moving body 15 on which the syringe 11 is mounted.

As shown in FIGS. 2 and 3, the syringe 11 is for accommodating an adhesive, and has a nozzle 12 for discharging the adhesive at a lower end thereof. . The tip of an air hose 13 is connected to the upper part of the syringe 11 via a packing (not shown).
Is connected to the pressure / timer controller 14. Then, by the pressure / timer controller 14,
When air having a predetermined pressure is supplied to the syringe 11, the adhesive in the syringe 11 is discharged from the nozzle 12 by a predetermined amount, so that the adhesive is discharged onto the work 1 as shown in FIG. The adhesive 7 can be applied.
The discharge timing of the adhesive 7 at that time is also selected by the pressure / timer controller 14. The adhesive 7 accommodated in the syringe 11 is, for example, a silicone polymer or a modified silicone polymer, and has a relatively high viscosity.

As shown in FIGS. 2 and 3, the moving body 15 is slidably mounted on a guide 17 provided in a U-shaped guide block 16, and is provided with an air supply source (not shown). Is supplied, it moves vertically along the guide 17. That is,
The moving body 15 moves by supplying and discharging air.

The syringe 11 is attached to the movable body 15 via an L-shaped bracket 18. The bracket 18 has a bottom plate 18a provided with a hole 18b through which the nozzle 12 of the syringe 11 is inserted.
The cylinder 11 is attached by the holding member 19 in a state where the nozzle 12 is inserted into the cylinder b. The retainer 19 has a U-shape. As shown in FIG.
The syringe 11 is attached to the bracket 18 by being attached to the bracket 8.

When the moving body 15 descends in the guide block 16 by air, the bracket 18 and the syringe 11 descend together with the moving body 15. At this time, when the syringe 11 descends to the application point,
As shown in FIG. 5A, the adhesive 7 is discharged from the nozzle 12 onto the work 1 and applied, and when the application is completed, the moving body 15 moves up in the guide block 16 so that the syringe 11 is also moved. It is going to rise. The movement timing and the movement amount of the moving body 15 are controlled by a control device 20 described later.

In the coating apparatus 10, the syringe 11 descends toward the workpiece 1, which is the object to be coated.
If the syringe 11 is simply moved up after the adhesive 7 is applied to the work 1, a thread extension reaching the nozzle of the adhesive 7 applied on the work 1 is generated. Therefore, in the present embodiment, after the syringe 11 is lowered and the adhesive 7 is applied to the work 1, the cutting operation is performed by the separation processing unit 21 of the control device 20 so that the syringe 11 separates the adhesive 7. Has become.

That is, when the syringe 11 moves forward in the direction of arrow A shown in FIG. 4 to apply the adhesive 7 to the workpiece 1 as shown in FIG.
Is temporarily raised in the direction of arrow B, and a thread extension 7a is generated with the rise of the nozzle 12 above the adhesive 7, but at this time, the yarn is lowered a little distance in the direction of arrow C again toward the work. Thereafter, by raising the syringe 11 in the direction of arrow D and returning to the original position, the thread extending portion 7a adheres to the adhesive 7 and is separated from the nozzle 12. That is, the syringe 11 is used for the work 1
When the adhesive is applied, a thread extending portion 7a is generated. However, in order to separate the thread extending portion 7a, the separation processing section 21 controls the movement of the syringe 11 via the moving body 15, so that the syringe 11 It once rises to a predetermined position (arrow B), then immediately descends slightly (arrow C), and then rises to its original position, top dead center (arrow D).

For this reason, the control device 20 controls the syringe 11
When the adhesive 7 is applied to the work 1, the syringe 11
Moving body 15 so as to separate adhesive 7 from nozzle 12 of
And a disconnection processing unit 21 that controls the movement of the syringe 11 via the control unit. The length of arrows A to D indicating the movement of the syringe 11 in FIG. 4 schematically indicates the stroke amount during the movement of the syringe 11, and the stroke amount depends on the viscosity of the adhesive 7 to be handled. It has been selected based on:

Next, an embodiment of the method of the present invention will be described in relation to the operation of the coating apparatus 10. First, after the work 1 is supplied to the work setting section 4 of the transfer body 3 by the work supply mechanism 5 by the rotation of the transfer body 3 of the automatic assembling apparatus 2, the work set section 4 is further positioned at the coating station. In the coating station, the coating device 10 performs a coating operation.

In the coating apparatus 10, the moving body 15 is driven based on the coating processing section 22 of the control device 20 during the coating operation, so that the syringe 11 is first coated in the direction of arrow A shown in FIGS. The application step is performed by applying the adhesive 7 from the nozzle 12 to the surface of the work 1 in the work setting section 3 as shown in FIG.

When the adhesive 7 is applied to the work 1 in the application step, the separation processing section 21 of the control device 20 drives the moving body 15 to perform the separation step on the syringe 11. Let it do. That is, in the separation step,
The syringe 11 once rises in the direction of arrow B, then descends again at a slight distance as shown by arrow C, then moves in the direction of arrow D, and rises to its original position, top dead center. In this case, once the syringe 11 rises in the direction of arrow B, FIG.
As shown in (b), the adhesive 7 applied to the surface of the work 1
The thread extension 7a attached to the nozzle 12 is generated at the upper part of the nozzle, and thereafter, as shown in FIG. Agent 7 and then the syringe 11
Moves in the direction of arrow D, rises and returns to the original top dead center position, so that the thread extension 7 a attached to the adhesive 7 can be separated from the nozzle 12.

That is, in the embodiment of the method of the present invention,
When the syringe 11 is applied to the surface of the work 1 by the lowering of the syringe 11 to the application point, there is a separation step of moving the syringe 11 forward and backward to separate the thread extension 7a of the adhesive 7 from the adhesive 7. The thread extension 7 a generated in the adhesive 7 can be cut off from the nozzle 12 of the syringe 11.

Further, the syringe 11 is raised once and then slightly lowered again (arrows B and C), and then raised to the original position and returned (arrow D), thereby bonding the thread extending portion 7a with the adhesive. 7, the thread extension 7 a of the adhesive 7 can be reliably separated from the nozzle 12 of the syringe 11. Further, by attaching the thread extending portion 7a to the adhesive 7 and separating the same, the thread extending portion 7a does not fall down to a position apart from the adhesive 7, and therefore, unlike the prior art, the thread extending portion 7a is attached to the work 1 It can be prevented from protruding.

As a result, by repeatedly moving the syringe 11 forward and backward, the thread extending portion 7a can be reliably separated from the nozzle 12, and a predetermined amount of the adhesive 7 can be applied to the work 1 within a limited time. Even if the adhesive 7 having a relatively high viscosity is used, the tact time required for application can be reliably reduced without being limited to the adhesive.

In the embodiment of the application device 10, when the control device 20 applies the adhesive 7 to the work 1 as described above, the thread extending portion 7a of the adhesive 7 Since the separation processing unit 21 configured to move the syringe 11 forward and backward so as to separate it from the nozzle 12 is provided, the above-described coating method can be performed accurately. In addition, since the disconnection processing unit 21 of the control device 20 continuously performs the backward movement, the forward movement, and the backward movement of the syringe 11, the separation of the thread extension 7a can be performed reliably and in a short time. The separation step can be performed accurately and quickly.

In this embodiment, the syringe 1
The rising stroke in the direction of arrow B and the descending stroke in the direction of arrow C are set based on the viscosity of the adhesive 7. Agent 7 can be easily dealt with.

[0030]

As described above, according to the method of the present invention, when the syringe applies the adhesive from the nozzle to the object to be coated, there is provided a separating step of separating the thread extension of the adhesive from the adhesive. With this configuration, a predetermined amount of adhesive can be reliably applied to the object to be applied within a limited time by this separating step, and even if a relatively high-viscosity adhesive is used, the application can be performed regardless of the adhesive. There is an effect that the tact time required for the operation can be reliably reduced. In addition, when the adhesive is applied, the syringe is once retracted from the object to be applied and then moved forward again, and then returns to the original position, so that the adhesive thread extension is reliably cut off from the nozzle of the syringe. The effect can be.

According to the apparatus of the present invention, when the syringe applies the adhesive on the object to be coated, the apparatus has the separation processing section for moving the syringe so as to separate the adhesive from the nozzle of the syringe. Can be implemented accurately. Furthermore, when the syringe applies the adhesive, the backward movement, forward movement, and return movement to the original position of the syringe are continuously performed. Thus, there is an effect that the separation step can be performed accurately and quickly.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part of an automatic assembling apparatus to which an embodiment of a coating apparatus for carrying out a method of the present invention is applied.

FIG. 2 is a side view showing a coating apparatus for performing the method of the present invention.

FIG. 3 is a perspective view showing a coating apparatus.

FIG. 4 is an explanatory diagram showing a moving state at the time of applying a syringe.

FIG. 5 is an explanatory view showing a state until the applied adhesive is separated from a nozzle of a syringe.

FIG. 6 is an explanatory diagram showing a state of application of an adhesive by a conventional application device.

FIGS. 7A and 7B are explanatory diagrams showing a state in which a thread extending portion is generated between an applied adhesive and a nozzle, and an explanatory diagram showing a state in which the thread extending portion protrudes from a plastic plate;
It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coated object (work) 2 Automatic assembling apparatus 3 Carrier 4 Work set part 7 Adhesive 7a Adhesive thread extension part 10 Coating device 11 Syringe 12 Nozzle 14 Pressure / timer controller 15 Moving body 16 Guide block 17 Guide 18 Bracket 19 Holder 20 Control device 21 Separation processing unit

Claims (4)

[Claims] In a method for applying an adhesive, a syringe containing an adhesive is moved toward an object to be coated, and the adhesive is applied to the object from a nozzle of the syringe. A method for applying an adhesive, comprising a step of separating the tip of the adhesive from a nozzle when the adhesive is applied on an object. 2. The method according to claim 1, wherein in the separating step, the syringe is once retracted from the object to be coated, moved again by a predetermined amount toward the object to be coated, and then returned to the original position. The method for applying the adhesive described in the above. 3. A syringe for storing and discharging an adhesive, a moving body for moving the syringe forward and backward with respect to an object to be coated, and a control device for controlling the movement of the syringe via the moving body. In the adhesive coating apparatus, which moves toward the object and applies the adhesive onto the object from the nozzle of the syringe, the controller controls the syringe when the syringe applies the adhesive on the object. An adhesive applying device, characterized in that the adhesive applying device has a separating section for moving the adhesive so as to separate the adhesive from a nozzle of the syringe. 4. The disconnecting section, wherein when the syringe has applied the adhesive, the retreating movement, the forward movement and the return movement to the original position of the syringe are continuously performed. 3. An apparatus for applying the adhesive according to 3.