WO2007141991A1

WO2007141991A1 - Material application device and material application method

Info

Publication number: WO2007141991A1
Application number: PCT/JP2007/059719
Authority: WO
Inventors: Koji Hishiyama
Original assignee: Three Bond Co., Ltd.
Priority date: 2006-06-02
Filing date: 2007-05-11
Publication date: 2007-12-13
Also published as: JP2007319822A; CN101460256A

Abstract

A material application device (10) has a nozzle (32) and a tubular member (34). The nozzle (32) has in its forward end a discharge opening (48) for discharging a viscous material (M) and also has in its outer periphery an opening (49) contiguous to the discharge opening (48). The tubular member (34) is located on the outer peripheral side of the nozzle (32) and is movable in the axial direction relative to the nozzle (32). The nozzle (32) moves relative to a workpiece (W) with the opening (49) facing backward and discharges the viscous material (M) from the discharge opening (48) and the opening (49) to apply the material in a bead-like form, along a substantially closed-loop locus in a plan view. When the nozzle (32) returns to a start region of the application of the viscous material (M) and reaches an application end position, the discharge of the material is stopped and the tubular member (34) closes the opening (49).

Description

Specification

Material application apparatus and material application method

Technical field

[0001] The present invention relates to a material application apparatus and a material application method, and more specifically, can ensure a sufficient height of a bead formed by applying a material and has a substantially closed loop shape in a plan view. The present invention relates to a material coating apparatus and a material coating method capable of accurately forming a joint portion between a coating start region and an end region when a viscous material is applied to the material.

Background art

Conventionally, there has been known a material application apparatus that discharges a viscous material such as silicone resin from the tip of a nozzle and continuously applies the material to a surface to be coated of a workpiece. This type of material application device discharges material from the tip of the nozzle at the application start position, and moves the nozzle relative to the workpiece to return to the application start position, thereby making the material in a bead shape along a closed loop trajectory. Application can be performed.

[0003] The nozzle is generally provided with a discharge port at the tip, but this type of nozzle has a flat cross-sectional shape with a small height relative to the width of the applied material, that is, the bead. It has become normal. For this reason, it is difficult to ensure a sufficient amount of deformation in the height direction of the bead, and the sealing performance when used as a sealing material is not always sufficient.

[0004] Therefore, for example, as described in Patent Document 1, a nozzle structure for securing a sufficient height with respect to the width of the bead has been proposed.

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-182836

Disclosure of the invention

Problems to be solved by the invention

[0006] The nozzle described in Patent Document 1 includes a discharge port located at the tip and an opening located on the outer peripheral side and connected to the discharge port, and discharges material from the discharge port and the opening. As a result, a bead having a height corresponding to the height of the opening can be formed. However, in the case of a nozzle having such an opening, when the nozzle is moved from the application start position along the locus of the closed loop and returned to the application start position, the bead is joined. This results in inconvenience that the sealing performance tends to be partially different, with the tendency for a step to appear in the part.

[0007] [Object of the invention]

The present invention has been devised by paying attention to such inconveniences, and its purpose is to improve the height accuracy of the joints in the material application start region and the end region, and to improve the sealing performance in the entire area of the bead. It is an object of the present invention to provide a material coating apparatus and a material coating method that can be maintained well.

Means for solving the problem

[0008] In order to achieve the above object, the present invention provides a material application apparatus that discharges a viscous material from a nozzle tip and applies the viscous material to an application surface of a workpiece.

The nozzle includes a discharge port located at the tip of the nozzle, and an opening that is located on the outer peripheral side of the nozzle and discharges the viscous material together with the discharge port.

The opening is configured to be openable / closable via an opening / closing means.

[0009] In the present invention, the opening / closing means includes a tubular member extending in the same axial direction as the nozzle, and the opening can be opened and closed by moving the tubular member relative to the nozzle. The composition is taken.

[0010] Further, it is preferable that the opening has a slit shape connected to the discharge port, and the height of the opening is set larger than the diameter or width of the discharge port. Yes.

[0011] Further, the present invention includes a nozzle provided with a viscous material discharge port at the tip and an opening for discharging the viscous material together with the discharge port on the outer peripheral side, and opening and closing the opening. In a material application method in which a viscous material is applied in a bead shape along a substantially closed loop trajectory in plan view by relatively moving the nozzle and the workpiece using a material application apparatus including a means,

Moving the nozzle in a state in which the opening is facing backward with respect to the relative movement direction, and discharging the viscous material from the discharge port and the opening; When the nozzle reaches the application end position where the nozzle returns to the material application start position, the opening is closed through the opening / closing means.

[0012] In the method, when the application of the material is started, the opening area of the opening is controlled to gradually increase,

When the application of the material is finished, the opening area of the opening is controlled to be gradually reduced,

When the application of the material is completed, the opening is closed.

The invention's effect

[0013] According to the present invention, by adopting a configuration in which an opening is provided on the outer peripheral side of the nozzle tip and the material is discharged together with the discharge port, the material application height can be increased according to the height of the opening. It is possible to ensure this. In addition, since the opening can be opened and closed, the opening can be closed when the viscous material is applied along the locus of the closed loop and the application of the viscous material is finished. No step is produced at the joint between the application start position and the end position.

[0014] Further, since the means for opening and closing the opening is constituted by a tubular member, for example, the opening and closing of the opening can be easily performed by relatively moving the tubular member along the axial direction of the nozzle. It is possible to easily adjust the opening area by gradually changing the height at which the opening is exposed.

[0015] Furthermore, material application is started by an application method in which the opening area of the opening is gradually increased when the material application is started, while the opening area of the opening is gradually reduced when the material application is completed. It is possible to keep the height uniform by smoothing the seam of the bead between the position and end positions.

Brief Description of Drawings

FIG. 1 is a schematic front view showing an overall configuration of a material coating apparatus according to the present embodiment.

FIG. 2 is a right side view of FIG.

FIG. 3 is a schematic cross-sectional view of a coating head showing a state where an opening of a nozzle is opened.

FIG. 4 is a schematic cross-sectional view of a coating head showing a state in which an opening of a nozzle is closed. FIG. 5 is a schematic perspective view of main parts of a nozzle and a tubular member.

[Fig. 6] (A) is an explanatory view showing a state in which the tubular member cap also protrudes from the nozzle tip side, and (B) is (A)

) Bottom view, (C) is right side view of (A).

FIG. 7 is an explanatory view showing an initial position at which a coating operation is started.

FIG. 8 is an explanatory diagram showing immediately after the start of material application.

FIG. 9 is an explanatory view showing a state in which application has progressed further than the application state of FIG.

FIG. 10 is an explanatory view showing an intermediate state in which application is performed in a state where the tip positions of the nozzle and the tubular member are kept constant.

FIG. 11 is an explanatory view showing a state where the nozzle returns to the application start position.

FIG. 12 is an explanatory diagram showing a state in which the coating has progressed further than the state shown in FIG.

FIG. 13 is an explanatory view showing a state where the application is completely completed.

Explanation of symbols

[0017] 10 Material applicator

32 nozzles

34 Tubular member (opening / closing means)

48 Discharge port

49 opening

B bead

M viscous material

W Work

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic front view of a material coating apparatus according to the present embodiment, and FIG. 2 shows a right side view with a part omitted. In these drawings, the material application device 10 is arranged in the upper region of the work W supported on the upper surface of the table T. The material coating apparatus 10 includes a syringe 11 that contains the viscous material M, an upper bearing 12 and a lower bearing 13 that are provided below the syringe 11, and an application head 14 that is positioned below the lower bearing 13. Including a coating unit 15 and a back panel 16 that supports the coating unit 15. And a moving device 17 that displaces the coating unit and moves the coating unit relative to the workpiece W. In this embodiment, the table T is provided so as to be movable in the Y-axis direction (see FIG. 2), and the coating unit 15 moves in the X- and Z-axis directions (see FIG. 1) via the moving device 17. It is provided as possible.

[0020] The syringe 11 is supported via two upper and lower fixtures 18 located on the front side (left side in FIG. 2) of the back panel 16. A material supply pipe 20 is connected to the lower end of the syringe 11, and the material supply pipe 20 extends downward through the upper bearing 12 and the lower bearing 13 fixed to the back panel 16, and the lower end thereof. The coating head 14 is positioned in the partial area. Between the upper bearing 12 and the lower bearing 13, a pulley 21 is disposed around the material supply pipe 20, while a motor Ml is disposed on the lower side of the syringe 11. A driving pulley 23 is fixed to the output shaft 22 of the motor Ml, and a timing belt 25 is provided between the driving pulley 23 and the pulley 21, whereby the lower side of the material supply pipe 20 is The coating head 14 is rotatable so as to be rotatable in the circumferential direction.

As shown in FIGS. 3 and 4, the coating head 14 includes a tubular outer case 30 having an open top, an inner case 31 received in the outer case 30, and an inner case 31 of the inner case 31. A nozzle 32 supported at the lower center, and a tubular member 34 as an opening / closing means that is supported at the lower center of the outer case 30 and combined to be positioned on the outer peripheral side of the nozzle 32. Yes. Here, a coil spring 35 is arranged between the outer case 30 and the inner case 31, and the outer case 30 is urged downward with respect to the inner case 31 by the coil spring 35! RU

[0022] The outer case 30 includes a bottom portion 30A and a peripheral wall portion 30B that continues upward from the outer peripheral force of the bottom portion 30A. A passage hole 36 for vertically passing the nozzle 32 and the tubular member 34 is provided at the center of the bottom 30A, while the cross section of the upper peripheral surface of the peripheral wall 30B is substantially U-shaped. A provided guide groove 37 is formed. A roller 39 constituting a swing mechanism 38 (see FIG. 1), which will be described later, is provided in the guide groove 37, and the axial position of the roller 39 is displaced vertically, so that the nozzle 32 and the tubular shape are tubular. The members 34 can move relative to each other in a telescopic relationship. The inner case 31 includes a through hole 40 extending in the vertical direction at the center thereof, and a lower region of the material supply pipe 20 is inserted into the through hole 40. Here, a circumferential groove 20A is formed on the outer peripheral surface of the material supply pipe 20, and the distal end of the screw 42 inserted in the radial direction of the inner case 31 is positioned in the circumferential groove 20A. As a result, the material supply pipe 20 is fixed to the inner case 31. In addition, a step portion 43 having a reduced inner diameter is formed at the lower portion of the through hole 40, and a stepped flange portion 44 formed at the upper portion of the nozzle 32 is seated and engaged with the step portion 43. An O-ring 45 is interposed between the flange portion 44 and the material supply pipe 20.

Further, the inner case 31 is provided with bolts 46 penetrating vertically. The lower part of the bolt 46 extends downward and protrudes through the bottom 30A of the outer case 30, and the outer case 30 and the inner case 31 are moved vertically in FIG. These are provided so as to be capable of relative movement, while their relative rotation is restricted.

As shown in FIGS. 5 and 6, the nozzle 32 includes a discharge port 48 that opens in a plane substantially perpendicular to the axis of the nozzle 32, and the outer periphery of the tip portion, ie, the lower end portion of the nozzle 32. A slit-like opening 49 provided on the side and continuing to the discharge port 48 is provided. As shown in FIG. 6, the height H of the opening 49 is set to a dimension larger than the diameter or width D of the discharge port 48, so that the material M is applied to the upper surface of the workpiece W. A bead shape whose height is higher than the width of the bead can be obtained. Incidentally, although not particularly limited, the diameter D of the discharge port 48 in the present embodiment is approximately 0.9 mm, and the height H of the opening 49 is approximately 1.5 mm. Further, the slit width of the opening 49 is set to a dimension substantially corresponding to the diameter D.

As shown in FIGS. 3 and 4, the tubular member 34 is provided with a shape having a flange portion 52 at the upper end portion and a screw portion 53 at the intermediate outer peripheral surface. The flange portion 52 is fixed to the outer case 30 by tightening and fixing a nut 54 to the screw portion 53 in a state of being seated on the upper outer peripheral portion of the passage hole 36.

The swing mechanism 38 is supported via a support body 60 connected to the lower bearing 13. As shown in FIG. 2, the support 60 is positioned at two locations on the left and right sides of the lower bearing 13 in the figure. A pair of bearing plates 62 and a plate-like mounting table 63 fixed to the upper parts of the bearing plates 62 are configured. The swing mechanism 38 includes an actuator 65 supported by the mounting table 63 and a swing frame connected via a connecting member 67 attached to the tip of a piston rod 66 protruding downward from the lower portion of the actuator 65. Including 68. The swing frame 68 includes a pair of elongated swing plates 70 supported around a support shaft 69 extending between the lower ends of the pair of bearing plates 62, and one end portions of the swing plates 70 (see FIG. 1 between the middle right end portion) and a connecting shaft 71 connected to the lower end side of the connecting member 67 and a roller 39 rotatably supported at the free end as the other end of each swing plate 70. It is configured. The roller 39 is positioned in a guide groove 37 provided on the outer periphery of the outer case 30 and is provided so as to be in contact with the lower surface of the upper flange 37A that forms the guide groove 37. Accordingly, as the piston rod 66 advances and retreats and the free end of the swing plate 70 swings up and down, the outer case 30 moves up and down, and the tubular member 36 fixed to the outer case 30. As the nozzle moves up and down, the opening portion 49 force S of the nozzle 32 is controlled to open and close.

[0028] As shown in FIGS. 1 and 2, the moving mechanism 17 includes a Z-axis cylinder 75 that supports the back panel 16, and an X-axis cylinder 75 that supports the Z-axis cylinder 75 so as to be movable in the X-axis direction. It is composed of axis rail 76. The Z-axis cylinder 75 includes a piston rod 77 projecting downward, and the piston rod 77 and the back panel 16 are connected to each other via a connecting arm 78. The coating unit 15 supported on the panel 16 can be moved up and down as a whole. The X-axis rail 76 is supported between a pair of pillars (not shown) located on both ends of the rail so as to form a substantially gate-shaped frame shape. Accordingly, the nozzle 32 and the work W can move in the three orthogonal directions of X, Y, and the vertical axis together with the configuration in which the table T supporting the work W is provided so as to be movable in the Y-axis direction. . The shaft cylinder 75 may be, for example, a motor and screw type.

In FIG. 1, reference numeral 80 denotes a sensor for detecting the vertical position of the outer case 30, and the sensor 80 controls the initial operation of the tubular member 34 when controlling the operation of the material coating apparatus 10. The position is detected. [0030] Next, a method of applying the material M in the present embodiment will be described with reference to FIGS.

[0031] Here, the locus of applying the viscous material M in a closed loop shape to the application surface (upper surface) of the workpiece W supported by the table T is taught in advance, and the viscous material in the syringe 11 is assumed to be preliminarily taught. A constant discharge pressure is applied to M through a pressure device (not shown), and the pressure adjustment valve is controlled to open and close in response to ON / OFF signals for application start and stop.

By applying the application start signal, the application head 14 moves to the application start position on the upper surface side of the workpiece W (see FIG. 7). In FIG. 7, the tip (lower end) of the nozzle 32 is shown in contact with the workpiece W, but in reality, a certain gap is formed. At this time, the opening portion 49 is not fully opened, and the tubular member 34 is positioned so that the substantially lower half region is an opening area.

[0033] At the same time that the viscous material M is discharged from the discharge port 48 and the opening 49, the coating unit 15 moves along a predetermined movement locus via the moving device 17. At this time, the nozzle 32 moves in a state in which the opening 49 is rearward with respect to the moving direction. Further, the application unit 15 is gradually raised by driving the Z-axis cylinder 75 to raise the application head 14, and the upper surface of the application start region of the bead B formed of the viscous material M is maintained to be the inclined surface S. (See Figure 8).

[0034] When the nozzle 32 moves with the positional force shown in FIG. 8 also directed to the movement trajectory, the actuator 64 of the swing mechanism 38 described above is activated, and the axial position of the roller 39 is gradually raised to thereby form a tubular member. The position of 34 is raised with respect to the nozzle 32, so that the opening 49 is fully opened (see FIG. 9).

[0035] Thereafter, the nozzle 32 and the tubular member 34 are moved so as to form a closed loop-shaped bead B on the surface to be coated of the workpiece W while maintaining the same height position, and move toward the coating start position. (See Figure 10 and Figure 11). Next, as shown in FIG. 12, along the inclined surface S, the positions of the nozzle 32 and the tubular member 34 gradually rise, and at the same time, the tubular member 34 descends relative to the nozzle 32 and opens. 49 is gradually closed from the top, and as shown in FIG. 13, when passing through the region of the inclined surface S, the opening 49 is completely closed and the discharge of the viscous material M is stopped, and the nozzle is substantially simultaneously with this. 32 and the lower end of the tubular member 34 from bead B It will be separated.

Therefore, according to such an embodiment, when the viscous material M is applied to the application surface of the workpiece W and the material M is applied along the locus of the closed loop, the application start position and the application end are completed. It is possible to form the bead B without causing a step in the joint at the position, and it is possible to make the sealing performance uniform in all regions.

[0037] The best configuration, method and the like for carrying out the present invention are disclosed in the above description. The present invention is not limited to this.

That is, the present invention is mainly illustrated and described mainly with respect to specific embodiments, but the embodiments described above without departing from the technical spirit and scope of the present invention. On the other hand, various modifications can be made by those skilled in the art in terms of shape, material, quantity, and other detailed configurations.

Accordingly, the description limiting the shape and the like disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. Descriptions in the names of members excluding some or all of the limitations are included in the present invention.

For example, in the above-described embodiment, the configuration in which the tubular member 34 constituting the opening / closing means is movable in the vertical direction is adopted, but a configuration in which the tubular member 34 is movable in the circumferential direction may be adopted. In this case, it is sufficient to form a notch for opening and closing the opening 49 formed in the nozzle 32 in the vertical direction on the outer periphery of the tubular member.

It is also possible to use a configuration that moves the coating unit 15 in the Y-axis direction by providing a Y-axis moving mechanism in the force transfer device 17 that adopts a configuration that moves the table T in the Y-axis direction. Furthermore, the opening 49 is not limited to the illustrated configuration example. For example, in the illustrated example of the embodiment, the shape appears as an inverted U shape, but the apex portion of the acute isosceles triangle is the rounded curved surface portion, and the rounded curved surface portion is located on the upper end side, or Make beads with various cross-sectional shapes as other triangular or daruma-shaped openings.

Claims

The scope of the claims

[1] In a material application device that discharges viscous material from the nozzle tip and applies it to the surface to be coated of the workpiece

The material coating apparatus, wherein the opening is provided so as to be opened and closed through an opening / closing means.

[2] The opening / closing means includes a tubular member extending in the same axial direction as the nozzle, and the opening is provided to be openable / closable by moving the tubular member relative to the nozzle. The material application apparatus according to claim 1.

[3] The opening is formed in a slit shape connected to the discharge port, and the height of the opening is set larger than the diameter or width of the discharge port. The material applicator described.

[4] A material including a nozzle provided with a discharge port for viscous material at the tip and an opening for discharging the viscous material together with the discharge port on the outer peripheral side, and an opening / closing means for opening and closing the opening. In a material application method in which a viscous material is applied in a bead shape along a substantially closed loop-like locus in plan view by moving the nozzle and the workpiece relative to each other using an applicator, the opening portion is in the relative movement direction. On the other hand, the nozzle is moved in a state of facing backward, and the viscous material is discharged from the discharge port and the opening,

A material application method comprising: closing the opening through the opening / closing means when the nozzle reaches an application end position where the nozzle returns to the material application start position.

[5] When the application of the material is started, the opening area of the opening is controlled to gradually increase,

5. The material application method according to claim 4, wherein the opening is closed when application of the material is completed.