JP4512932B2 - Spray nozzle for painting outer wall materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for coating an outer wall material.
[0002]
[Prior art]
The fiber reinforced cement board that is widely used as an outer wall material is gray-white to gray-black in color, and it is poor in design, so it can be decorated with various colors to provide surface waterproofing. Is called.
[0003]
By the way, at present, there are two main types of coating methods that are suitable for the surface patterning of these outer wall materials, such as the blurring pattern and two or more colors. is occupying.
[0004]
[Problems to be solved by the invention]
However, the former inkjet method is a method in which paint is sprayed from a small nozzle for ink jet to the surface of the outer wall material in a small circle to ellipse shape, so there is an advantage that a fairly fine pattern can be drawn, but it is discharged from one nozzle Since the amount of paint cannot be changed, the blurring pattern is centered on blurring by combining two or more colors, and a shade pattern of one color cannot be represented.
[0005]
In addition, since the decorative coating is performed so as to fill a wide surface with small dots from a minute nozzle, there is a problem that the coating takes time and the processing speed is slow.
The latter spray nozzle method has the advantage that a variety of blur patterns that change steplessly can be realized by continuous control of the spraying time and the amount of paint supplied, and the coating time is also fast. If the tone is too monotonous, there is no change in the direction perpendicular to the transfer direction, and there are a large number of nozzles, the spraying time and the amount of paint supplied for each nozzle are controlled to show the shade pattern. There was a problem that a stripe pattern was formed on the wall plate surface due to the overlap of the spray patterns of the nozzles.
[0006]
In order to solve such a problem, it is conceivable to draw a circular to elliptical pattern with a spray so as to compensate for the advantages and disadvantages of the ink jet method and the spray method.
[0007]
However, when a circular to elliptical spray pattern is drawn by this spray, it is necessary to make the spray nozzle spray duration very short as the wall plate material transfer speed increases.
[0008]
However, the conventional spray nozzle open / close needle is connected to the solenoid via a link, and there is a slight delay time due to the mechanical play and inertia generated in the open / close mechanism. Thus, due to friction of the O-ring 13 that seals between the opening / closing needle 6 and the coating material supply passage 3, there is a limit in speeding up the operation of the opening / closing needle 6 of the spray nozzle, and quick response and short injection There is a problem that it becomes difficult to realize the duration, and as a result, the transfer speed of the wall plate material that is the object to be coated cannot be increased, and there is a limit in shortening the time required for the painting process.
[0009]
This invention eliminates the above-mentioned drawbacks, and when spraying a spray pattern in a circular to elliptical shape, the spray nozzle can be sufficiently opened and closed even in a short time to ensure the desired concentration and color tone are applied. It was made as an issue to make it possible.
[0010]
[Means for Solving the Problems]
That is, the invention of claim 1 relates to a spray nozzle for painting an outer wall material, in the spray nozzle for painting an outer wall material, wherein an open / close needle for controlling the spraying of paint on the spray nozzle for painting the surface of the outer wall material is driven by a solenoid. The plunger of the solenoid is directly attached to the opening / closing needle of the spray nozzle for painting, and the seal member in the gap between the opening / closing needle and the spray nozzle body is arranged such that the outer peripheral edge is on the spray nozzle main body and the inner peripheral edge is on the outer peripheral surface of the opening / closing needle. It is an attached surface seal material, and the seal surface can be deformed into a diaphragm shape in accordance with the movement of the open / close needle. The solenoid plunger reciprocates in response to an electric signal pulse, and the open / close needle moves the plunger. solenoid that was opened and closed as to control the paint ejection, thereby opening operation of the closing needle Having an open signal voltage holding pulse is larger than the normal open holding voltage to the beginning of the rising pulse of is for quickly opening speed of the opening and closing needle by the rising pulse.
[0011]
According to the spray nozzle for coating the outer wall material, since the seal around the opening / closing needle is performed by a diaphragm-like seal member, there is no friction like an O-ring and the operating resistance is reduced, so that quick response is guaranteed. The Further, since the open / close needle is directly connected to the plunger of the solenoid, there is no delay in operation due to mechanical play, and a quicker operation can be realized reliably .
[0012]
In addition , since the plunger and the open / close needle are driven with a stronger force, a quick response is realized, and once activated, the normal open holding voltage is used, thereby preventing unnecessary power consumption.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a cross-sectional view of a spray nozzle for painting an outer wall material according to an embodiment of the present invention.
[0014]
A spray nozzle 1 for coating an outer wall material according to an embodiment of the present invention includes a base body 1c and a cover plate 1b having a spray port 1a having a paint as a jet stream Z. The atomizing air passage 2 and the paint passage 3 are formed concentrically, and an atomizing air supply port 4 and a paint supply port 5 communicating with the respective passages 2 and 3 are provided.
[0015]
And the spraying opening 1a of the cover board 1b is located concentrically in the opening part of the atomization air path 2 and the coating material path 3 of the base body 1c, and is fixed with the volt | bolt etc.
An opening / closing needle 6 whose tip is sharpened conically with respect to the spray port 1a is disposed concentrically with respect to the paint passage 3, and the opening / closing needle 6 is inserted into or exposed to the spray port 1a. In this state, it can be moved in the direction indicated by the arrow in the axial direction.
[0016]
The open / close needle 6 has a rear end fixed directly to the plunger 8 of the solenoid 7, and the movement of the plunger 8 operated by the solenoid 7 is directly transmitted to the open / close needle 6.
[0017]
As a member 9 for sealing between the opening / closing needle 6 and the paint passage 3, as shown in an enlarged view in FIG. 2, an outer peripheral edge 9a is closely attached to the base body 1c of the spray nozzle, and an inner peripheral edge 9b is Similarly, a sheet-like sealing material 9 is densely attached to the outer peripheral surface of the opening / closing needle 6, and the sealing surface 9 c can move in a diaphragm shape in accordance with the movement of the opening / closing needle 6.
[0018]
Since the diaphragm-like sealing material 9 may come into contact with the solvent of the paint, it is made of a material having excellent chemical resistance and has a strength capable of withstanding the pressure of the paint, for example, a pressure of about 0.01 to 0.1 MPa. Yes.
[0019]
As a structure for this, for example, a rubberized cloth made of a rubber plate such as NBR or CR, or a woven or non-woven cloth made of tough chemical fibers, with the rubber layer integrally formed on both sides is used. Specifically, the sheet body has a three-layer structure in which the rubber layers are laminated and integrated on the front and back surfaces of a woven fabric and a nonwoven fabric made of a tough material.
[0020]
In FIG. 1, reference numeral 10 denotes a bracket for the solenoid 7, which is attached to a support member 11 fixed to the base body 1c of the spray nozzle with a bolt or the like via an adjusting screw 12.
[0021]
Next, the operation of the spray nozzle for painting the outer wall material will be described.
In the spray nozzle 1 for painting, the solenoid 7 is remotely operated by an electrical signal from outside the figure, and the plunger 8 reciprocates according to the electrical signal.
[0022]
At this time, since the plunger 8 is integrally connected to the opening / closing needle 6 and there is no play between them, the opening / closing needle 6 operates as the plunger moves, and there is no operation delay with respect to the command signal.
[0023]
Further, since the seal member 9 that seals between the open / close needle 6 and the paint passage 3 is a diaphragm-like seal member, there is little resistance to the vertical movement of the open / close needle 6 and this is combined with the good response. Help you move quickly.
[0024]
Therefore, the operability of the open / close needle is better than that of the conventional spray device in which the open / close needle is transmitted by the link and sealed by the O-ring 13 as shown in FIG. In addition, since there is no sliding friction between the opening / closing needle 6 and the seal member 9, the test material was continuously driven for 24 hours without wearing out the O-ring due to wear. Although there was no abnormality, the O-ring was observed with a microscope, and as a result, a fuzzy change was observed on the friction surface.
[0025]
Next, the solenoid 7 was driven with an open signal as a rising pulse larger than the normal open holding voltage.
Specifically, in the solenoid 7 in which the opening duration can be controlled in units of 0.1 milliseconds by employing the diaphragm-shaped sealing material 9, as shown in FIG. When the holding pulse P at the time T0 and the holding voltage V0 (24 VDC in the illustrated example) is the condition, the rising of the voltage V1 (DC 100 volt in the illustrated example) approximately three times the holding voltage V0 is at the head of the holding pulse P. The opening / closing operation was performed with the pulse P1 provided for a time T1 of about 10% of the holding voltage T0.
[0026]
Note that the width indicated as “Adjustment 1” in FIG. 4 is within a range in which the opening / closing duration can be adjusted, and the width of the rising pulse P1 is adjusted as “Adjustment width 2” according to this adjustment width.
[0027]
As a result, the initial movement of the opening / closing needle 6 becomes very rapid, and in combination with the use of the diaphragm-like seal member 9, a shade pattern by a spray pattern can be drawn on the surface of the outer wall material transferred at 45 m / min. I was able to.
[0028]
When sealing around the open / close needle with an O-ring without a rising pulse, the transfer speed of the outer wall material is limited to about 12 m / min. With the method of the present invention, the efficiency is improved nearly four times. It is done.
[0029]
【The invention's effect】
Since the present invention is configured as described above, according to the first aspect of the present invention, when the outer wall material surface is coated using the spray device, the spray responsiveness is improved, so that the short spray duration is achieved. Even if it is time, the following operation can be sufficiently performed, and as a result, the transfer speed of the outer wall material can be increased.
[0030]
According to the invention of claim 2, since the initial operating state of the open / close needle can be made extremely sensitive, it can be reliably injected even in a short injection time, and even if the transfer speed of the outer wall material is increased. A spray pattern can be reliably sprayed, and a beautiful pattern can be applied quickly.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a spray nozzle for painting an outer wall material of the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of a spray nozzle for painting an outer wall material according to the present invention.
FIG. 3 is a graph showing a driving method of a spray nozzle for painting an outer wall material according to the present invention.
FIG. 4 is an explanatory view of an opening / closing needle part of a spray nozzle of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spray nozzle 2 Air passage for atomization 3 Paint passage 4 Air supply port for atomization 5 Paint supply port 6 Opening / closing needle 7 Solenoid 8 Plunger 9 Diaphragm seal material

Claims (1)

In the spray nozzle for painting the outer wall material, which is driven by a solenoid, the opening and closing needle for controlling the spraying of the paint of the spray nozzle for painting the outer wall material surface, the plunger of the solenoid is directly attached to the opening and closing needle of the coating spray nozzle. The seal member in the gap between the opening / closing needle and the spray nozzle body is a planar sealing material having an outer peripheral edge attached to the spray nozzle body and an inner peripheral edge attached to the outer peripheral surface of the opening / closing needle. It can be deformed into a diaphragm shape as it moves, and the solenoid plunger reciprocates in response to the pulse of the electric signal, and the opening and closing needle opens and closes according to the movement of the plunger to control the spraying of paint, and the opening and closing needle opens The holding pulse, which is the solenoid release signal, is at the beginning of the normal release holding voltage. It has the rising pulse of the hearing voltage, painting spray nozzle of the outer wall material that quickly opening speed of the opening and closing needle by the rising pulse.

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