Fluid sprinkling – spraying – and diffusing – Including supplemental gas shaping or shielding jet – Plural sets of gas jet orifices
Reexamination Certificate
2000-02-02
2001-11-06
Scherbel, David A. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including supplemental gas shaping or shielding jet
Plural sets of gas jet orifices
C239S290000, C239S601000, C239S418000
Reexamination Certificate
active
06311899
ABSTRACT:
SPECIFICATION
A nozzle device and a gun unit in an apparatus for applying adhesive by spraying in a spiral form
1. Technological Field
The invention of the present application relates to an apparatus for applying adhesive by spraying in a spiral form.
2. Background of Technology
Regarding the apparatus for applying adhesive by spraying in a spiral form, Tokukaisho No. 63-283774 and Tokukaisho No. 63-283774, for example, have been known to the public. These disclose the apparatus for applying adhesive by spraying in a spiral form, whereby a spiral spray pattern of adhesive fiber is formed by the following process. By causing rotating pressurized air flow (pressurized air flow discharged from a plurality of pressurized air holes arranged concentrically with an adhesive hole) to act on filamentous molten adhesive discharged from an adhesive hole of a nozzle, the filamentous molten adhesive is rotated and stretched into a spiral form.
Besides, Tokukaihei No. 2-227154 and Tokukaihei No. 3-146160 disclose the technological thought of reforming the spiral spray pattern of adhesive fiber from the circular rotation to the elliptical rotation by causing the secondary spiral pressurized air flow to act on the spiral spray pattern of adhesive fiber (formed by causing rotatating pressurized air flow to act on adhesive fiber or filamentous molten adhesive).
The above Tokukaihei No. 2-227154 and Tokukaihei No. 3-146160 disclose the technological thought of reforming the spiral spray pattern of adhesive fiber from the circular rotation to the elliptical rotation, but such technological thought involves the necessity of causing the secondary spiral pressurized air flow to act on adhesive fiber rotating circularly, with the result that construction of the nozzle device becomes complicated.
Furthermore, in order to obtain the desired spiral spray pattern of elliptical rotation, it is required to adjust and control the secondary rotating pressurized air flow and a tip portion of a nozzle must be replaced so as to change the mechanism of supplying the secondary rotating pressurized air flow.
The present invention has for its object to make the spiral spray pattern of adhesive fiber changeable from the circular rotation to the elliptical rotation without complicating the construction of the nozzle device. Another object of the present invention is to make the major axis direction of elliptical rotation changeable so that the adhesive application width is made selectable.
DISCLOSURE OF THE INVENTION
The first invention of the present application is to provide a nozzle device in an apparatus for applying adhesive by spraying in a spiral form, characterized in that it comprises (a) a nozzle base
1
having an adhesive supply hole
11
at the center thereof and a plurality of pressurized air holes
12
arranged concentrically with the adhesive supply hole
11
, (b) a truncated cone
2
(in the shape of an inverted truncated cone) connected to the underside of the nozzle base
1
, having at the center thereof an adhesive hole
21
connected to the adhesive supply hole
11
of the nozzle base
1
and a circumferential surface positioned at the inner center side from the lower ends of plural pressurized air holes
12
, whereby rotating pressurized air flow from plural pressurized air holes
12
is flowed down as it is rotating along the circumferential surface of the truncated cone
2
, and (c) a nozzle projection
3
of deformed (partly cut away) conical body or deformed (partly cut away) cylindrical body connected to the underside of the truncated cone
2
, having at the center thereof an adhesive agent hole
31
connected to the adhesive supply hole
11
of the truncated cone
2
and a pair of (right and left) opposing downward slanting surfaces Q (the circumferential surface is partially cut away in V-shape in side view), with its upper side being a round shape whose area is almost equal to or smaller than that of the underside of the truncated cone
2
and its under side being a non-circular shape which has a minor axis in the direction where the lower ends of the downward slanting surfaces Q exist and a major axis in the direction where the lower ends of the downward slanting surfaces Q do not exist.
The second invention of the present application provides a nozzle device in an apparatus for applying adhesive by spraying in a spiral form, characterized in that an adhesive exposing surface P is formed at a part of the downward slanting surface Q in the nozzle projection (of the first invention) by exposing an adhesive hole at a tip portion of the downward slanting surface Q.
The third invention of the present application provides a gun unit in an apparatus for applying adhesive by spraying in a spiral form, which is characterized in that a spirally spraying pattern is selectable in the major axis direction of the oval by making the major axis direction of the underside of the nozzle projection changeable.
In applying adhesive agent by an apparatus for spraying adhesive in a spiral form, pressurized air flow discharged from a plurality of pressurized air flow holes flows down along a truncated cone. At this time, in the first invention pressurized air flow turns into rotating pressurized air flow due to eccentricity of the pressurized air hole and acts on a filamentous molten adhesive bead discharged from the adhesive agent hole of the nozzle, whereby spiral adhesive agent fiber is formed. In the first invention of the present application, spiral pressurized air flow is deflected in its rotating direction due to its touching the downward slanting surface Q of the nozzle projection when it flows down circularly along the truncated cone. Consequently, spiral spraying pattern of adhesive fiber turns elliptical in a section.
In the second invention of the present application, molten adhesive agent flowing down through an adhesive agent hole of the nozzle projection is preliminarily stretched by making the rotating pressurized air flow act partly on molten adhesive agent flowing down through an adhesive agent hole of the nozzle projection and as a result, a spiral spraying pattern of adhesive agent fiber is rotated at high speed in elliptical form in a section.
In the third invention of the present application, the direction of a major axis at the under side of the nozzle projection is changed to the desired direction by turning the nozzle unit (by which spiral spray pattern of adhesive agent fiber is made oval in a section in the first invention) in relation to the gun base of the gun unit and as a result, the major axis direction of the spiral spray pattern is changed to the desired direction and thus spiral spraying is done by a spiral spray pattern of oval cross section having the desired major axis direction.
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patent: 3754710 (1973-08-01), Chimura
patent: 3886565 (1975-05-01), Kojima
patent: 4570834 (1986-02-01), Ward
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patent: 4970985 (1990-11-01), Slauterback
patent: 4987854 (1991-01-01), Hall
patent: 5194115 (1993-03-01), Ramspeck et al.
patent: 5566866 (1996-10-01), Jacobsen et al.
patent: H3-146160 (1991-06-01), None
patent: H7-155653 (1995-06-01), None
patent: H8-500767 (1996-01-01), None
Hidaka Shoji
Mende Takayuki
Kabushiki Kaisha Santuuru
Kim Christopher S
Koda & Androlia
Scherbel David A.
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