JP2015112571A - Spray gun for coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray gun for coating, that expands a spraying range when an atomization air stream starts jetting a coating material and thereby effectively jets the coating material and forms a spray form having a uniform, long, and flat shape.SOLUTION: A spray gun for coating has a body 10 for facilitating gripping by hand, and an air nipple 11 which is disposed at a lower end of a handle part and to be connected to a compressor facility. Further, in the spray gun for coating, an air amount adjustment member 12 is provided, and opening/closing of a front end nozzle 15 is controlled with a trigger 14 disposed at and penetrating a trunk part of the body, by using a grip 13 disposed at a trunk part of an upper end of the handle part, whereas force level of compression control and an opening/closing width are adjusted by a rear end adjustment member 16. Moreover, laterally aligned spray holes 25 are additionally arranged on a wing part 22 of a nozzle cap 20.

Description

  The present invention relates to a spray gun for painting.

  The structure of a conventional spray gun for painting mainly has a spray gun body for facilitating gripping. At the lower end of the handle part of the spray gun body, an air nipple is installed and connected to the compressor equipment. In addition, an adjustment member is installed beside that to adjust the amount of air entering. The trigger installed in the body part of the spray gun body is controlled by the grip installed in the body part at the upper end of the handle part to control the opening and closing of the nozzle at the front end. Further, the adjusting force at the rear end of the body portion of the spray gun body adjusts the compression control force and the opening / closing width. In addition, a separate flow rate adjusting member is installed at the rear end or one side of the spray gun body to adjust the degree of atomization during spraying by adjusting the air discharge amount of the front end nozzle cap. This configuration forms the basic functional structure of this type of spray gun for painting. By adjusting the force on the grip, the trigger is controlled to open and close the nozzle cap. Combining the flow paths of the internal airflow, the air provided by the compressor facility is ejected from the nozzle, and when the air is discharged, the paint in the paint can is guided and ejected together. The paint is uniformly atomized and sprayed onto the workpiece together with the air jetted to the sides of the protruding wings on both sides of the nozzle cap. At the same time, the atomizing effect during spraying can be adjusted and changed by adjusting the amount of side air blown from the nozzle cap via the adjusting member according to the needs of the workpiece and work environment. Improve work quality.

  When the air current of spray coating is ejected from the nozzle, the paint jet outlet of the nozzle is fitted into the air port in the center of the nozzle cap in order to form a siphon action and suck the lacquer together. The spray air stream that is diverted inside the spray gun for the jet blows out from the gap between the air port and the paint outlet. At the same time, it guides the spray of paint. At this time, the lacquer has a circular shape, and the atomized airflow of the protruding wings on both sides of the nozzle cap is ejected from the side, and the lacquer is crushed into a long flat shape. The spray range is adjusted by adjusting the air discharge amount of the atomized airflow. In this work method, the spray area is adjusted according to the size of the atomizing airflow, so if the lacquer is sprayed at once and becomes a long flat shape, depending on the experience of the operator and the quality of the adjustment, the lacquer partially Thinning or darkening can lead to uneven paint, affecting the quality of the overall spray painting operation.

JP 05-237420 A

Therefore, the present invention, when the spray lacquer in a conventional paint spray gun is crushed into a long flat shape, when adjusting the spray range by adjusting the air discharge amount of the atomized airflow, Depending on the experience of the operator and the quality of the adjustment, the lacquer erupts at a time and becomes a long flat shape, and the lacquer lacquer partially becomes thinner or darker, resulting in uneven paint and overall spray coating It is intended to solve problems that affect work quality.
In order to solve the above-mentioned problems, the present invention increases the spray range when the atomizing air flow starts to eject the paint, thereby effectively ejecting the paint and forming a uniform long flat shape spray form. An object is to provide a spray gun for painting.

  In the present invention, since the atomizing air flow channel is installed in the wings on both sides of the nozzle cap, the spray holes arranged in the lateral direction are added to the position of the base near the center hole of the wings, and atomized. The air current gives a wide and uniform spray effect to the paint sprayed from the center of the nozzle cap, and the quality can be maintained even when the spray area is increased.

  Furthermore, in order to solve the above-mentioned problems, the present invention increases the spray range by extending the spray holes laterally at the base of the wings protruding on both sides of the nozzle cap, and the paint can be ejected easily and uniformly. A long flat spray form can be formed.

  In order to achieve the above-mentioned object, the spray gun for painting of the present invention is provided with an elliptical wide-diameter portion outside the flow path of the atomizing airflow in the wings on both sides of the nozzle cap. By expanding the diameter of the elliptical hole, a spray hole arranged in a lateral direction is added to a position close to the base of the wing, and the spray hole is arranged in a horizontal direction, so that the atomized airflow is generated in the nozzle cap. When guided through the flow path of the atomizing airflow installed in the wings on both sides and sprayed from the spray hole, the paint sprayed from the center of the nozzle cap is given a wide and uniform spray effect. At the same time as expanding the coating, the quality of the coating can be improved.

  Thus, the coating spray gun of the present invention is particularly close to the base of the wing by installing the elliptical wide-diameter portion outside the flow path of the atomizing airflow in the wing on both sides of the nozzle cap. It has a function to expand the spray area by adding spray holes arranged sideways at the position and giving a wide and uniform spray effect to the lacquer, and maintaining the uniformity when spraying the paint , Ensure the quality of the overall painting work. Therefore, industrial utility value and practicality are extremely high.

It is a disassembled perspective view which shows the spray gun for coating by one Embodiment of this invention. It is principal part sectional drawing which shows the spray gun for coating by one Embodiment of this invention. It is principal part sectional drawing which shows the spray gun for coating by one Embodiment of this invention. It is principal part sectional drawing which shows the spray gun for coating by one Embodiment of this invention. It is a top view which shows the spray gun for coating by one Embodiment of this invention. It is a figure which shows the characteristic of the spray gun for coating by one Embodiment of this invention.

(One embodiment)
A coating spray gun according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a structure, FIG. 2 is a partial structure diagram, FIGS. 3 to 5 are diagrams showing a structural relationship, and FIG. 6 is a diagram showing a painting operation. The painting spray gun of this embodiment is basically similar to the structure of a conventional painting spray gun. The spray gun for painting of this embodiment has a main body 10 for making it easy to grasp by hand. An air nipple 11 is installed at the lower end of the handle portion of the main body 10 and connected to the compressor equipment. Further, an air amount adjusting member 12 is installed beside that to adjust the amount of air entering. The trigger 14 penetratingly installed in the body part of the main body 10 is controlled by the grip 13 installed in the body part at the upper end of the handle part to control the opening and closing of the nozzle 15 at the front end. Further, the adjusting member 16 at the rear end of the body portion of the main body 10 adjusts the compression control force and the opening / closing width. Further, a separate flow rate adjusting member 17 is installed on the rear end or one side of the body 10 body part, and the divided flow rates of the paint spray air flow and the atomized air flow formed by the main flow path and the sub flow path of the main body 10 are reduced. By adjusting the airflow 21 at the center of the nozzle cap 20 and the airflow sprayed by the spray holes 24 in the lateral direction of the protruding wings 22 on both sides, the coating spray amount and the degree of atomization are adjusted. Achieve. Thereby, the basic functional structure of the spray gun for painting of this embodiment is constituted.

  In order to increase the spray area evenly when the paint is sprayed, the spray gun for painting according to the present embodiment is designed in a direction in which the atomized air current is guided and ejected. An atomizing airflow passage 23 for guiding the atomizing airflow is installed in the protruding wing portions 22 on both sides of the nozzle cap 20. Further, a predetermined number of spray holes 24 are provided corresponding to the inner surface of the air hole 21 at the center of the nozzle cap 20 of the wing part 22 and penetrate through the atomized air flow channel 23 installed therein. The atomizing air flow channel 23 is provided with a wide-diameter portion 231 corresponding to the outside of the channel on the surface where the nozzle cap 20 and the main body 10 are connected and fixed. In particular, the wide-diameter portion 231 is installed so as to intersect with each other in a form in which a lateral elliptical hole of the wing portion 22 is widened. Therefore, at least two spray holes 25 are added at a slightly wider position near the base of the wing part 22. Furthermore, unlike the existing vertically arranged spray holes 24, the additionally installed spray holes 25 are arranged in a horizontal orientation, so that the horizontal spray range is expanded and the spray holes 25 of this embodiment are arranged. An improved structure of the nozzle cap 20 is configured.

  With the above-described structure design, at least two laterally arranged spray holes 25 are added at positions close to the base of the both-side wings 22 of the nozzle cap 20, so that the coating can flow along the center of the nozzle cap 20 along with the spray airflow. When the air flow is ejected from the air hole 21, guided, and ejected from the nozzle 15, the atomized air flow is also guided through the atomizing air flow channel 23 installed inside the wing 20 on both sides of the nozzle cap 20. By spraying from the spray holes 24 and 25, the effect of spraying the paint uniformly is achieved. In particular, when the paint is sprayed from the central position of the nozzle cap 20 through the suction guide of the paint spray airflow through the installation of the spray holes 25 arranged in the lateral direction which are added to the position close to the base of the side blades 22, By achieving a uniform spray effect that is wide in the spray air flow, the paint is sprayed easily and uniformly to form an oval paint spray form (as shown in FIG. 6). Furthermore, the concentration of the paint is not unbalanced. Therefore, the paint spray area is increased and the quality of the paint spray is improved.

  That is, the coating spray gun of the present embodiment installs the elliptical wide-diameter portion outside the flow path of the atomized airflow on both wings of the nozzle cap without changing the existing function of the coating spray gun. Therefore, when the spray holes arranged in the horizontal direction are added and the paint is guided and ejected along with the spray airflow, the atomized airflow ejected from the spray holes is wide and uniform spraying action. In order to achieve a purpose of expanding the spray area by uniformly spreading the paint and exhibiting a horizontally long spray form. Furthermore, since the spray uniformity is maintained, the quality during paint spraying is clearly improved. Therefore, it is clear that the efficiency of the spray gun for painting is increased, the quality of painting can be improved, and the practical value can be increased.

  As described above, the nozzle cap structure of the spray gun for painting according to the present embodiment has an elliptical wide diameter portion outside the flow path of the atomized airflow in the wings on both sides of the nozzle cap. The spray holes arranged side by side at a position close to the position of the lacquer material have a wide and uniform spray effect. Maintain and ensure the quality of the overall painting work. Therefore, industrial utility value and practicality are extremely high.

10 body,
11 Air nipple,
12 Air amount adjusting member,
13 grips,
14 Trigger,
15 nozzles,
151 Paint outlet,
16 adjustment member,
17 minutes flow adjustment member,
20 nozzle cap,
21 air holes,
22 Wings,
23 Air flow channel for atomization,
231 wide diameter part,
24, 25 Spray holes.

Claims (3)

Having a body,
Inside the main body, a flow path for guiding and diverting airflow is formed,
An air nipple connected to the compressor equipment is installed at the lower end of the handle portion of the main body,
An air amount adjusting member that adjusts the amount of air entering the air nipple is installed,
On the upper body part of the handle part of the main body, a grip is installed to control the trigger installed inside and through,
The trigger receives the control of the grip, and controls the opening and closing of the nozzle at the front end,
A paint spray outlet of the nozzle is fitted into a central air hole of a nozzle cap provided at the front end of the body body of the main body, and a wing portion having a pair of spray holes protruding on both sides of the nozzle cap. Provided,
At the rear end of the body part of the main body, an adjusting member for adjusting the force of compression control of the grip and the width of opening and closing is installed,
A partial flow rate adjusting member for adjusting the partial flow rate of the spray air flow and the atomized air flow output by the main body is installed at a predetermined position of the body portion of the main body,
A spray gun for painting in which a spray airflow is ejected from the nozzle cap central air hole, and an atomized airflow is ejected from the spray holes of the wings on both sides of the nozzle cap;
An atomized airflow channel for guiding the atomized airflow is formed in the protruding wings on both sides of the nozzle cap, and a wide diameter portion is formed outside the channel corresponding to the fixed surface of the nozzle and the main body. Is installed, at least two spray holes are added at a wide position near the base of the wing part, and the added spray holes are arranged in a sideways manner. A spray gun for painting, characterized in that a lateral spray range is expanded and the form of paint sprayed from the center of the nozzle cap can be made wide and uniform.   2. The spray gun for coating according to claim 1, wherein the wide-diameter portion outside the flow path of the atomized airflow installed in the wing portion on both sides of the nozzle cap is elliptical.   2. The coating according to claim 1, wherein a wide-diameter portion outside the flow path of the atomized airflow installed in the wing portion on both sides of the nozzle cap communicates with the added spray hole. Spray gun.

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