JPH10314642A - Coating nozzle device of curtain spray coating applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the operation to vary and select a coating width by making it possible to freely select the position and number of the coating material holes communicating with a coating material supply port among the many coating material holes by the selection of the turning angle of a turning distributor. SOLUTION: A cylindrical distribution chamber 4 is formed between the coating material supply port 9 and the top end of the coating material hole group 2 consisting of the many coating material holes 2a and the cylindrical turning distributor 5 is loosely fitted to this cylindrical distribution chamber 4 and is made freely turnable. An inflow groove 7 for communication with the coating material supply port 9 and distributing grooves 8 of a divergent shape communicating with part or the whole of the coating material hole group 2 in continuation with this inflow groove 7 are formed in a developed state on the peripheral surface of the turning distributor 5. The position and number of the coating material holes 2a communicating with the coating material supply port 9 among the many coating material holes 2a are made freely selectable by the selection of the rotating angle of the turning distributor 5. As a result, the fine and arbitrary setting of the value of the coating width is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curtain spray coating apparatus (coating head in which a coating agent is discharged from a number of coating holes formed in a coating head, and pressurized air is discharged from an air groove formed in the vicinity of the coating hole. By applying pressurized air to the coating agent discharged from the groove, the coating agent discharged from the adjacent coating groove in the spray state interferes with each other in the spray state, so that the coating agent (for example, hot) The present invention relates to a coating nozzle device in a coating device of a type for applying a melt adhesive). More specifically,
Change of the coating width in the curtain spray coating device,
The present invention relates to a coating nozzle device that allows selection.

[0002]

2. Description of the Related Art In a coating nozzle apparatus of this kind, a mask plate (shim plate) is inserted between coating agent supply holes of a coating head and a coating agent supply groove of the mask plate (shim plate). A part of a large number of coating agent supply holes by a mask plate (shim plate)
There is known a structure in which the application width can be freely changed by making the remaining application agent supply holes effective by shutting off and making the position and number of the effective application agent supply holes changeable and selectable. In the coating width changing structure, in order to change or select the coating width, it is necessary to select a mask plate (shim plate) having a desired value of the effective width of the coating agent supply groove. )
Replacement work or application head replacement work is required.

[0003]

As described above, when changing or selecting the coating width, it is necessary to replace the coating head with a mask plate (shim plate) having a desired effective width of the coating agent supply groove and to replace the coating head. However, there is a disadvantage that the application operation needs to be stopped, and the operation efficiency is reduced. Further, it is necessary to prepare a large number of mask plates (shim plates) having different effective widths of the coating agent supply grooves. Therefore, an object of the present invention is to simplify the mechanism for changing and selecting an application width in a coating nozzle device, and to facilitate the operation of changing and selecting the application width.

[0004]

According to the present invention, there is provided a cylindrical distribution chamber in which a cylindrical rotary distributor is inserted between a coating material supply port and an upper end of a group of coating material holes having a large number of coating material holes. To form
A distribution groove of a divergent shape is formed on the peripheral surface of the rotating distributor in a deployed state communicating with a part or all of the coating agent hole group, and by selecting a rotation angle of the rotating distributor, a large number of coating agent holes are formed. By making the position and the number of the coating material holes communicating with the coating material supply port freely selectable, the coating width can be selected.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tubular distribution chamber is formed in a coating head, and the upper ends of a number of coating agent holes opened at the lower end of the coating head are opened at the lower end of the cylindrical distribution chamber. An application agent supply port is opened at the longitudinal center of the side surface of the cylindrical distribution chamber. An application agent supply outlet of an application agent supply control valve provided on a side surface of the application head communicates with the application agent supply port. A cylindrical rotating distributor is inserted into the cylindrical distribution chamber. An inflow groove for communicating with the application agent supply port on the peripheral surface of the cylindrical rotary distribution body, and a distribution that is continuous with the inflow groove and diverging in a deployed state to selectively communicate with a part or all of the application agent holes. By forming the groove, the position of the coating material hole communicating with the distribution groove, by selecting the rotation angle of the cylindrical rotating distributor,
The structure is such that the number changes.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. With reference to FIG. 2, the head block 10 of the coating nozzle device 1 includes an upper head housing 1.
1. The lower head housing 12, the nozzle head plate 13, the left half air plate 14, and the right half air plate 15 are integrated by mounting screws 16 and 17.

Referring to FIGS. 1 and 3, the upper end of coating agent hole group 2 composed of a number of coating agent holes 2a opened at the lower end of head block 10 is opened at the lower end of cylindrical distribution chamber 4. A large number of the coating material holes 2a of the coating material hole group 2 are arranged in a line in a direction perpendicular (or crossing) with the transport direction of the base material to be coated. In the embodiment, the diameter of the tip opening of the coating material hole 2a is 1.0 mm to 0.3 mm, and the pitch is 2.
0 mm and the number of the coating material holes 2a was 150. Pressurized air grooves 3 </ b> A and 3 </ b> B are formed in front of and behind many of the coating material holes 2. Pressurized heated air is supplied to the pressurized air grooves 3A and 3B through pressurized air supply holes 32 and 33 from a pressurized air supply hose 31 provided on the side surface of the head block 10.

Referring to FIG. 2, a coating material supply hose (for example, a hot melt supply hose) 21 provided on a side surface of the head block 10 passes through a coating material supply hole 22, a valve unit 6, and a coating material supply hole 23. An application agent (for example, hot melt) is supplied to the cylindrical distribution chamber 4. A cylindrical rotating distribution body 5 is loosely fitted into the cylindrical distribution chamber 4, and the rotating distribution body 5 is kept in close contact with the cylindrical distribution chamber 4 and the peripheral surface of the cylindrical distribution chamber 4. It is rotatable.

On the peripheral surface of the rotary distributor 5, an inflow groove 7 for communicating with the coating material supply port 9 in a developed state (see FIG. 6), and a part of the coating material hole group 2 continuous with the inflow groove 7. Alternatively, a divergent distribution groove 8 communicating with all of them is formed. In addition, the inflow groove 7 may be omitted so that a part of the upper end of the distribution groove 8 is always in communication with the application agent supply port 9.

The operation of the valve unit 6 starts and stops the application of the coating material to the base material by supplying and shutting off the coating material to the coating material supply port 9.

FIG. 7 shows a selection example of the coating width according to the present invention. FIG. 7 shows a case where the application width is minimized (the rotation angle of the rotary distributor 5 is the smallest). FIG. 9 shows a case where the application width is maximum (the rotation angle of the rotary distributor 5 is the largest). FIG. 8 shows a case where the application width is set to an intermediate value, and the value of the application width can be set to an appropriate value by arbitrarily setting the rotation angle of the rotation distributor 5 between the minimum and the maximum. It is. The value of the application width can be very easily changed by the rotation of the rotation distributor 5 (for example, an operation piece 61 protruding from the side surface of the head block 10 and the operation piece 61 is rotated by an appropriate tool). .

FIGS. 10 to 16 show a second embodiment of the present invention, in which a plurality of valve units 6 are provided, and a coating material is supplied to the cylindrical distribution chamber 4 from a plurality of coating material supply ports. That is, FIG.
2, a structure in which a plurality of valve units 6A and 6B are added to both sides of the valve unit 6 as compared with FIG. Referring to FIGS. 11 and 12, a plurality of coating agent supply grooves 7 </ b> A and 7 </ b> B are formed on the circumferential surface of cylindrical distribution chamber 4 on both sides of inflow groove 7 of rotation distribution body 4. The number of the coating material supply ports 9 corresponding to the number of the coating material supply grooves 7A are also equal to the number of the coating material supply ports 9.
A and 9B are provided.

The coating material supply groove for supplying the coating material is increased according to the increase in the coating width. 14 to 16 show examples of selecting a coating width according to the present invention. FIG.
When the application width is to be minimized (the rotation angle of the rotation distributing body 5 is to be minimum), supply is performed only through the central application agent supply port 9 and the inflow groove 7.
FIG. 16 shows the case where the coating width is maximum (the rotation angle of the rotary distributor 5 is maximum), in addition to the central coating agent supply port 9 and the inflow groove 7, the coating agent supply port 9 and the inflow groove 7. The coating material is supplied through all of the plurality of coating material supply ports 9A and 9B and the coating material supply grooves 7A and 7B on both sides. FIG. 15 corresponds to FIG. 8 of the first embodiment, and shows a case in which the application width is set to the middle, and the rotation angle of the rotation distributing body 5 is arbitrarily set between the minimum and the maximum so that the center can be set. In addition to the coating material supply port 9 and the inflow groove 7, the value of the coating width can be set to an appropriate value, and the coating material is supplied through a plurality of the coating material supply ports 9A and a part of the coating material supply groove 7A. I do. In the embodiment of FIG. 11, the valve unit 6
A, 6B and the valve chamber of the valve unit 6
By connecting the return hose to the paint tank to the side opposite to the connection surface of the coating material supply hose, deterioration due to stagnation of the coating material can be prevented. In addition, since the rotating distributor 5 has a surface where the distribution groove 8 and the inflow groove 7 do not exist function as a mask surface to prevent the supply of the coating agent, the valve units 6A and 6B are omitted, and the coating agent supply port 9 and the coating agent supply port 9 are removed. The object of the present invention can be achieved even if the supply to the agent supply groove 9A is made a single common valve unit.

[0014]

According to the present invention, the application width can be changed very easily by the rotation of the rotation distributing member without the need of replacing the coating head, replacing the shim plate having the coating groove, and the like. The value of the coating width can also be set arbitrarily finely, which has the effect of increasing work efficiency. Further, the value of the application width in the curtain spray device can be set accurately, reliably, and finely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a coating nozzle device showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a bottom view of the same.

FIG. 4 is a vertical cross-sectional view of a rotating distributor.

FIG. 5 is a front view of the same.

FIG. 6 is a development view.

FIG. 7 shows an example of selecting an application width according to the present invention, and shows a case where the application width is minimized (the rotational angle of the rotational distributor 5 is minimized).

FIG. 8 shows a case where the application width is set to an intermediate value.

FIG. 9 shows a case where the application width is maximized (the rotational angle of the rotational distributor 5 is maximized).

FIG. 10 is a perspective view of a coating nozzle device showing a second embodiment of the present invention.

FIG. 11 is a longitudinal sectional view of the same, and the longitudinal sectional position is a coating agent supply port 9;

FIG. 12 is also a longitudinal sectional view, and a longitudinal sectional position is defined as an application agent supply port 9A.

FIG. 13 is an exploded view of the rotating distributor.

FIG. 14 shows an example of selecting a coating width according to the second invention of the present application,
The case where the application width is minimized (the rotational angle of the rotational distributor 5 is minimized) is shown.

FIG. 15 shows a case where the application width is set to an intermediate value.

FIG. 16 shows a case where the application width is maximized (the rotational angle of the rotational distributor 5 is maximized),

[Description of Signs] 1 Coating nozzle device 2a Coating agent hole 2 Coating agent hole group 3A Pressurized air groove 3B Pressurized air groove 4 Cylindrical distribution chamber 5 Rotating distributor 6 Valve unit 7 Inflow groove 8 Distribution groove 9 Coating agent Supply 10 head block

Claims (3)

[Claims] 1. A curtain-sprayed base material by applying pressurized air to a coating material discharged from a large number of coating material holes to cause the coating materials discharged from a large number of coating material holes to interfere with each other in a spray state. In a curtain spray coating apparatus for applying a coating material to a coating material, a cylindrical distribution chamber in which a cylindrical rotary distributor is inserted is provided between a coating material supply port and an upper end of a coating material hole group including a large number of coating material holes. Forming and forming a divergent distribution groove on the peripheral surface of the rotating distributor so as to communicate with a part or all of the coating agent hole group. The coating nozzle device is characterized in that the coating width can be selected by freely selecting the position and the number of coating agent holes communicating with the coating agent supply port among the agent holes. 2. An inflow groove for communicating with an application agent supply port is formed on a peripheral surface of the rotating distributor at an axially central portion of the rotating distributor.
The inflow groove is continuous with the upper end of the distribution groove having a divergent shape when the rotary distributor is deployed, and the coating material supplied in the cylindrical distribution chamber is fed into the distribution groove via the inflow groove. 2. The coating nozzle device according to claim 1, 3. An inflow groove for communicating with an application agent supply port at a central portion in the axial direction of the rotatable distributor in an unfolded state on the peripheral surface of the rotatable distributor, and an unfolded state of the rotatable distributor continuous with the inflow groove. Forming a distribution groove having a divergent shape, and forming a plurality of coating material supply grooves on both sides of a coating material supply port facing the inflow groove of the rotary distribution body on the peripheral surface of the cylindrical distribution chamber. The center coating agent supply port is always opened to the inflow groove of the rotating distributor, and the plurality of coating agent supply grooves located on both sides of the coating agent supply port are selectively communicated with the distribution groove of the rotating distributor. The coating nozzle device according to claim 1, wherein the number of coating agent supply grooves for supplying the coating agent is increased in accordance with an increase in the coating width.