JPH0233903Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fan-shaped jet nozzle suitable for applying a high viscosity adhesive in the form of a strip.

As illustrated in FIGS. 1 and 2, a fan-shaped jet nozzle that has been commonly used in the past has a nozzle body 1 with a substantially hemispherical bowl-shaped surface 2a and a cylindrical flow continuous with the bowl-shaped surface 2a. A dome-shaped recessed hole 2 consisting of a channel 2b is provided in a rearward open state along the front-rear axis, and an X-shaped groove 3 is provided at the front end of the nozzle body 1, with its trough forming a bowl in the dome-shaped recessed hole 2. The bowl-shaped surface 2a and the groove surface of the V-shaped groove 3 intersect with each other to form two arcuate ridge lines. The two arcuate ridgelines form the lip-shaped jet nozzle 4 into a round shape when viewed from the front of the axis of the nozzle body 1, and this nozzle is used to apply high-viscosity adhesive. When ejected in a fan shape, the distribution is extremely unevenly distributed at both ends as shown in Figure 3 a and b, or the unevenness is concentrated in a strip at one or more places at both ends and the middle part as shown in Figure 4 a and b. If the nozzle is moved laterally to apply the adhesive in a strip, the coating film will be unevenly distributed on both edges or striped in the middle. Totally unsuitable for forming.

In this invention, the coating film pattern by static jetting is the fifth.
It has an oval shape as shown in Figure a, and its cross section is symmetrical as shown in Figure b.
7 and 7, the nozzle body 1 has a bowl-shaped surface 2a whose tip is substantially semispherical or deeper than the hemisphere, and a cylindrical flow formed upstream of the bowl-shaped surface 2a that is continuous with the bowl-shaped surface 2a. A dome-shaped recessed hole 2 consisting of a channel 2b is provided in a rearward open state with its bowl-shaped surface 2a facing forward, and a V-shaped groove 3 is provided at the front end of the nozzle body 1. The vicinity of the valley is the bowl-shaped surface 2a and the cylindrical channel 2b in the recessed hole 2.
Bowl-shaped surface 2 at the depth when it reaches boundary B with
In addition to providing the V-shaped groove 3 in a state of expanding forward to the extent that it is divided into two, partially conical cut portions 5, 5 are provided in the center of both groove surfaces while leaving portions near both ends of the V-shaped groove 3.
are provided separately, and these V-shaped grooves 3 and cut portions 5,
5 intersects the bowl-shaped surface 2a, so that 4
Two arcuate ridgelines 4a, 4a and two arcuate cutout ridgelines 4
An orifice-type lip-shaped spout 2 is provided, and the arcuate ridgelines 4a, 4a are planes that intersect near the center of the bowl-shaped surface 2a, as shown continuously by the imaginary chain line at the center notch. Due to the relationship formed by the grooved surface and the bowl-shaped surface 2a, the curvature is relatively large and approximately equal to the radius of curvature of the bowl-shaped surface 2a.
is formed by the intersection of the partially conical cut portion 5, which is different from a flat surface, and the bowl-shaped surface 2a, so it becomes an arc with a smaller radius of curvature than the arcuate ridge line 4a.

The jet nozzle 4 formed by the four arcuate ridgelines 4a, 4a and the two arcuate cutout ridgelines 4b, 4b has a rhombic frontal shape when viewed from the front of the axis of the nozzle body 1, and both obtuse angle portions are rounded. The round part of the lever has the shape of a swollen camellia leaf, so it restricts both ends of the fan-shaped ejected liquid, and at the same time averages it by tending to concentrate in the center, and prevents striped unevenness that tends to occur in the center. This is how it happens.

The embodiment of FIGS. 8 and 9 has a V-shaped groove 3
are formed with cut parts 5, 5 in which shallow round grooves are provided diagonally vertically on both groove surfaces, thereby forming arcuate notch ridgelines 4b, 4b with a radius of curvature smaller than that of the arcuate ridgeline 4a, Furthermore, in the embodiments shown in FIGS. 10 and 11, shallow round grooves 5, 5 are formed in the central part of each arcuate ridge line 4a, leaving the parts near both ends, parallel to the axis of the dome-shaped recessed hole 2. arcuate notched ridgelines 4b, 4 having a radius of curvature smaller than that of the arcuate ridgeline 4a.
Furthermore, in the embodiments shown in FIGS. 12 and 13, the tip of the nozzle body 1 is formed into a roughly shallow wide-angle V-groove so that the tip of the bowl-shaped surface 2a is appropriately removed. An arcuate notched ridgeline 4 with a radius of curvature smaller than that of the arcuate ridgeline 4a by providing the cut parts 5, 5
b, 4b, and in both cases, the frontal shape of the jet nozzle 4 is approximately camellia leaf-shaped as in FIG. 7.

The shape of the dome-shaped recessed hole 2 in the above embodiments, V
By adjusting the angle of the groove 3, the shape of the cut portion 5, etc., the front shape of the jet nozzle 4 can be changed as shown in FIG.
It can be formed into a rhombic shape with both obtuse corners rounded, and the same effect as in the camellia leaf-shaped spout 4 can be obtained.

In the above embodiments, the arcuate ridge lines 4a, 4a
It is desirable that the connecting portions between the arcuate notch ridgelines 4b and 4b be smoothed out to prevent the formation of corners, thereby preventing unevenness in the coating film thickness.
Although the bowl-shaped surface 2a can be made slightly shallower than a hemisphere, it is important to make the bowl-shaped surface 2a a hemisphere or deeper in order to expand the fan-shaped ejection angle. If it is formed so as to extend to the deep part of the groove, it is inappropriate because the jet nozzle 4 will not be shaped like a diamond or a camellia leaf with rounded corners on both sides. The arcuate ridge lines 4a, 4a formed,
The height h of the boundary where the cut portion 5 intersects with the dome-shaped recessed hole 2 and is in contact with the arcuate notch ridge lines 4b, 4b is equal to 1 of the height H of the bowl-shaped surface 2a, as shown in FIG. /
It is important to select 3 or higher.

As explained above, according to the present invention, the lip-shaped spout formed by providing a cut portion at the intersection of the dome-shaped recessed hole and the V-shaped groove and near the center of the V-shaped groove surface is The area near both ends is formed by four arcuate ridge lines with a relatively large radius of curvature formed by the intersection of the V-shaped groove and the bowl-shaped surface, and the area near the center is formed by a cut formed at the center of the groove surface of the V-shaped groove. It is formed by two arcuate notch ridges with a relatively small radius of curvature formed by the intersection of the part and the bowl-shaped surface, thereby changing the frontal shape of the jet nozzle into an approximately diamond-shaped or camellia-like shape with rounded obtuse corners. Because it was formed into a leaf shape,
This has the advantage that when a band-shaped coating film is formed by jetting high-viscosity adhesive in a fan shape and moving the nozzle laterally, it can be easily coated with a uniform film thickness as shown in Figure 5. However, the nozzle of the present invention is applicable not only to adhesives but also to high viscosity fluids and has similar effects.

[Brief explanation of drawings]

In the drawings, FIGS. 1 and 2 are a front view and a cross-sectional plan view of a conventional product, respectively, and FIGS. 3 and 4 are adhesive application patterns of a conventional product, respectively, and a is a In the pattern diagram of the stationary coating film, b is a cross-sectional view, FIG. FIG. 7 is a front view and a cross-sectional plan view showing one embodiment of the nozzle of the present invention, respectively;
8 and 9 are a front view and a cross-sectional plan view, respectively, of the nozzle of the present invention in another embodiment, and FIG. 10 and FIG. 11 are a front view and a cross-sectional plan view, respectively, showing still another embodiment. 13 and 13 are a front view and a cross-sectional plan view showing still another embodiment, respectively, FIG. 14 is a front view showing still another embodiment, and FIG. 15 is a sectional view for explaining the extent of the cut portion. It is. 1...Nozzle body, 2...Dome-shaped recessed hole, 2a
... Bowl-shaped surface, 2b ... Cylindrical channel, 3 ... V-shaped groove, 4 ... Spout nozzle, 4a ... Arcuate ridgeline, 4b ...
Arcuate notch ridgeline, 5... cut portion, B... boundary.

Claims (1)

[Claims for Utility Model Registration] 1. In the nozzle body 1, a bowl-shaped surface 2a that is approximately hemispherical or deeper than the hemisphere, and a cylindrical channel 2b formed upstream in a state that is continuous with the bowl-shaped surface 2a. A dome-shaped recessed hole 2 consisting of a bowl-shaped surface 2a is provided in a rearward open state on the front-rear direction axis, and a V-shaped groove 3 is provided at the front end of the nozzle body 1, with the valley portion thereof being in the forward direction. In addition to providing the dome-shaped recessed hole 2 at a depth that reaches the boundary B between the bowl-shaped surface 2a and the cylindrical channel 2b in a state of expanding forward, portions near both ends of this V-shaped groove 3 are left. Under this condition, cut portions 5, 5 are formed at the center of each groove surface, and these V-shaped grooves 3 and cut portions 5, 5 form the bowl-shaped surface 2.
By intersecting with a, four arcuate ridges 4
An orifice-type lip-shaped spout 2 is provided, which is composed of an orifice-shaped notch ridge line 4a, 4a and two arcuate notch ridgelines 4b, 4b, and the four arcuate ridgelines 4a, 4a form a bowl-shaped surface 2.
A and the V-shaped groove 3 intersect to form the vicinity of both ends of the jet nozzle 2 with a radius of curvature approximately equal to the curvature of the bowl-shaped surface 2a, and the two arcuate notch ridgelines 4b, 4b are bowl-shaped. The intersection of the surface 2a and the cut portion 5 forms the vicinity of the center of the jet nozzle 2 with a radius of curvature smaller than that of the arcuate ridge 4a, thereby changing the shape of the jet nozzle 4 to the axis of the nozzle body 1. A fan-shaped jet nozzle that has a rhombus shape with both obtuse angles rounded or a rhombus shape with both obtuse angles rounded and enlarged when viewed from the front. 2 Arc-shaped ridge lines 4a, 4 in lip-shaped spout 4
The fan-shaped jet nozzle according to claim 1, wherein the connecting portion between a and the arcuate notch ridgelines 4b and 4b is a smooth continuous ridgeline.