JPH0614822Y2 - Nozzle for sealing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sealing nozzle for applying a sealing agent to seal a joint gap of a metal plate member such as a car body of an automobile.

[Conventional technology]

A conventional sealing nozzle is, for example, SAIkai Sho 62-
There is a technology described in Japanese Patent Publication No. 95777, and according to this prior art, the structure is such that a sealing agent is extruded in a thin string shape or a flat string shape, and when applying the sealing agent, the tip of the nozzle is applied. It is designed to run under the condition that it is in contact with or extremely close to the work to be processed.

[Problems to be solved by the device]

However, with the development of robots, it is desired to use robots for sealing as well, but since the shape of the application gap portion on the workpiece is often complicated, complicated three-dimensional movement by a high-performance robot is required. Not only is there a disadvantage, but if there is an error in the work, there is a serious defect that results in a defective product.In addition, in the case of wide flat cord-shaped coating, the coating gap part bends unlike the case of thin cord-shaped coating. If so, the flat-blowing nozzle needs to be swung on the nozzle axis so as to match the bending, and the operation becomes more complicated.

For wide-width coating using a robot, the allowable range of pointing error and contact distance error is set by spraying from a position several tens of millimeters away from the coating gap area using the flat spray nozzle used for airless coating. It becomes wider and adapts to work by robots, but the application bead
As shown in FIG. 1, the cross-section is significantly uneven, and it is difficult to obtain a desired bead.

Therefore, an object of the present invention is to spray a high-viscosity sealant in a substantially conical shape different from that of flat spraying to form a flat flat cord-shaped coating bead cross section as shown in FIG. Another object is to provide such a nozzle having a simple structure, and yet another object is to have a wide allowable range of injection distance, injection pressure, viscosity, heating temperature, etc. It is to provide this kind of nozzle.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention has opened a plurality of injection ports with an average distribution in a substantially circular range, and the injection ports may be provided obliquely outward.
It may be provided in parallel with the nozzle axis, may have a small diameter hole, or may have a slit shape.

[Action]

With the above configuration, by moving the high-viscosity sealant from a distance of several tens of mm under a pressure of several tens of kg / cm3, the spray gun moves while spraying in a substantially conical shape. As a result, a flat cord-like bead having a width of 10 to several tens of mm and a thickness of 3 to 5 mm as shown in FIG. 2 can be formed on the work, and the injection gun can move vertically, horizontally or diagonally. , A bead having a substantially constant width is formed.

〔Example〕

Hereinafter, the nozzle of the present invention will be described in detail with reference to the illustrated embodiments.

The embodiment shown in FIG. 3 and FIG.
A flange 2 is formed on the outer periphery of the rear end, a relatively large-diameter cylindrical flow path 4 is provided in a rear open state while leaving the front end wall 3, and the front end wall 3 in front of the flow path 4 is Orifice type injection ports 5, 5 consisting of arcuate slits having a gap width of about 0.3 mm centered on the axis of the flow path 4 are arranged in a staggered manner outwardly and alternately. The sealant pumped from the rear of the flow path 4 has a plurality of injection ports 5, 5
From the front to the front in a substantially hollow conical shape, and a straight injection port 6 is provided in the center of the injection port group 5 to replenish the central part of the hollow conical jet flow. Good.

The injection ports 5 and 6 may be arranged in a shape as shown in FIGS. 5, 6, 7, and 8, or a small circular injection as shown in FIG. Multiple mouths 5 may be provided in multiple circular rows.

Although the injection port 5 in each of the above-described embodiments is formed obliquely outward, it may be formed in a straight forward state parallel to the axis of the flow path 4 and the conical jet flow in this case has a taper of about 16 °. I was able to.

Further, the injection ports 5 and 5 in the straight traveling direction may be arranged based on the shapes as shown in FIGS. 10, 11 and 12.

By forming the front end wall 3 in a dome shape as shown in FIG. 13, the angle of the conical jet flow can be increased in spite of forming the injection port 5 in the straight traveling direction.

The injection ports 5 and 6 can be easily formed by grinding, punching, electric discharge, or the like.

[Effect of device]

As described above, according to the present invention, by arranging a plurality of orifice type injection ports in a substantially circular area near the center of the front end wall of the nozzle main body with an average distribution, a remarkably simple structure Nevertheless, since the high-viscosity sealant can be ejected as a conical jet flow with a large discharge amount, it is possible to form an even flat cord-like application at high speed and in a wide range. A flat string bead as shown in Fig. 2 can be easily obtained regardless of changes in distance, injection pressure, viscosity, and heating temperature, and the angle of the conical jet can be obtained by forming the injection port obliquely outward. Can be enlarged to increase the width of the bead.

In addition, when the ejection port is formed in a slit shape, not only the required ejection amount can be easily obtained with a small number of ejection ports, but also it is advantageous in forming a conical jet flow.

[Brief description of drawings]

In the drawings, FIG. 1 is a sectional view of a coating bead formed by a conventional orifice type flat spray nozzle, FIG. 2 is a sectional view of a coating bead formed by a nozzle of the present invention, and FIGS. 3 and 4 are respectively. A longitudinal side view and a front view of a sealing nozzle of the present invention in one embodiment, FIGS. 5 to 12 are front views of only a main portion showing another embodiment respectively, and FIG. 13 is a further embodiment. It is a vertical side view which shows an example. 1 ... Mainly nozzle 3 ... Front end wall 4 ... Flow path 5 ... Injection port

Claims (3)

[Scope of utility model registration request] 1. A flow path leaving a front end wall (3) in a nozzle main body (1).
The front end wall (3) is provided with a plurality of orifice type injection ports (5) and (5) diagonally outward from the center of the front end wall (3) based on an average distribution. A sealing nozzle that is installed in the facing direction. 2. A flow path leaving a front end wall (3) in the nozzle main body (1).
The front end wall (3) is provided with a plurality of orifice type injection ports (5) (5) based on an average distribution in the front end wall (3) in a substantially circular area near the center thereof. A sealing nozzle provided in parallel with (4). 3. The sealing nozzle according to claim 1 or 2, wherein a slit-shaped jet port (5) is provided.