JP2005211699A - Nozzle chip of spray gun - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spray gun which is basically disposable together with a coating cup and is easily cleaned by solving the problem that a conventional spray gun is troublesome to be cleaned, residue due to insufficient cleaning causes a coating surface to be rough in use to make the use impossible in a worst situation to develop a nozzle chip structured so as to be used in a state that a coating material is not deposited to a spary gun body. <P>SOLUTION: In the spray gun basically taking over a conventional structure and functions, the nozzle chip has a passage for supplying a coating material, is formed to have an independent structure and is assembled to a spray gun body with a fitting tool to hold an air cap and a nozzle. As a result, the coating material is sealed in the nozzle chip without bringing the coating material into contact with the spray gun body and the nozzle chip is needless to be cleaned after use by being made disposable and the spray gun is kept always to the most optimal state by cleaning only a part thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a spray gun used for painting work.

There are various types of spray guns such as suction type, gravity type, etc., and the shape of the nozzle is various in order to improve the spray pattern of paint, but in any case, the nozzle is a part of the spray gun. Built in and integrated, it is used as a spray gun.

In this structure, the paint passage from the paint cup through the nozzle tip to the air cap is all assembled with fasteners, screws, etc., and it is an integrated structure. Cleaning is time-consuming, and after wiping the inside of the paint cup with a waste cloth, etc., the thinner is put in and repeatedly blown several times. Problems such as sticking to the painted surface during work and inability to work when it is severe. These problems are always problems at work sites, and many patents have been issued to solve these problems.

For example, in Japanese Patent Publication No. 7-289956, a bag-shaped object is set in a paint cup before use, and after use, the remaining paint is discarded together with the bag-shaped object to clean the cup. Making it easy.
In addition, the patent publication 2002-45737 application is intermittently sent by sucking air from a small hole separately provided with a sucked cleaning agent, and aims at cleaning the remaining paint passage more effectively. Also, in Japanese Patent Publication No. 7-275747, the material of the aluminum die-casting of the paint passage is a problem, and it is attacked during use. There are many applications that are interested in solving problems, etc., but even though these applications are easier to clean after use, they are more than effective if there is not enough time for cleaning. The consumption of cleaning agents and thinner is still attached.
Japanese Laid-Open Patent Publication No. 7-289956 No. 2002-45737 Hei 7-275747

To make cleaning after using the spray gun easy and to eliminate clogging of the nozzle, the nozzle tip is made independent from the main body, and a paint passage is directly provided in the nozzle tip, and the paint adheres to the spray gun main body. Remove the factor.

If the nozzle tip invented to solve these unsupported problems is used, the paint can be used without contacting the spray gun body at all. Gun body can be prepared.

In addition, by making the paint cup a resin that can be supplied at low cost, for example, when the remaining paint needs to be reused, it can be sealed and used as a storage container at a later date. In the case of paints such as the nature of Mighty Lac, the adhesion is poor, and as time passes, the paint can be removed neatly as if the casting is extracted from the mold as it hardens.

For this reason, if a certain number of paint cups are prepared, they can be reused during work with new ones, and even if they are not maintained for some reason, the nozzle tips and paint cups must be combined. If you replace it, you can always get the best spray gun out quickly without leaving any problems. In addition, the conventional spray gun requires a paint seal on the needle portion, but the structure of the spray gun body can be simplified and the production cost can be expected to be reduced.

In particular, in the small and airbrush type, since it requires only a small part, if the features of the nozzle tip of the present invention are integrated in combination with the paint cup and the air cap, the usability is further improved. Compared to the cost of making it disposable, it is freed from the troublesome care of thinner, waste, etc. for cleaning, and these series of effects must be repeated color change, painting and cleaning frequently It seems that the effect is especially great under the environment. These series of effects can be achieved by integrating the nozzle tip and the paint passage and forming them with a disposable resin.

A paint passage 2 that receives paint supply from a part of the A side of the nozzle tip 1 is attached, and a cup insertion port is provided at the tip, and it has the flexibility to bend freely to facilitate connection with the cup, and has an appropriate length. Is growing.
A fan-shaped groove 3 is cut on the A side of the nozzle tip 1 to supply air to the whole, and several small holes 5 are passed through to the opposite B side to feed it uniformly to the paint discharge port 4 from there. . The small hole 9 is an air supply hole for forming a spray pattern. The flow rate is adjusted by a throttle valve 10 provided in the main air E passage, and the small hole 9 is supplied to a circular groove 11 on the B surface. The spray pattern of the spray and paint is changed from the hole 13 of the air cap 6. By cutting the groove into a circular shape, even when the air cap 6 is rotated at the time of standing blowing or side blowing, the air supply is handled without causing any inconvenience. The insertion port C is sized so that the penetrating needle 12 can be inserted with an appropriate resistance. When inserted, the insertion port C has a role of a seal and smoothly follows the movement of the needle 12 so that the sealing function does not drop. A bellows 14 having moderate flexibility and expansion / contraction amount is provided. Since the paint passage 2 protrudes, the A-side groove 3 leaves a part of the unprocessed part, but leaves the unprocessed part larger than the notch 8 and prevents air from leaking there. Then, by providing the notch 8 in the main body 7, when the protruding portion is accommodated and screwed to the main body 7 by the fastener 15, the air cap 6, the nozzle tip 1, and the air passages of the main body 7, respectively. Can be screwed without inconvenience, and constitutes a spray gun incorporating a disposable nozzle tip.
Fig. 2 Nozzle tip 1 does not penetrate the needle, the short needle and the needle insertion port C are dimensioned so that they can be connected with an appropriate resistance. After connection, the control valve replaces the tip of the needle with paint. What to control.
FIG. 3 does not take the form of a control valve as a needle or a substitute for the needle in the control of the paint. Control.

FIG. 4 is an exploded perspective view of an embodiment of the present invention. The paint passage 2 that receives the supply of paint from the nozzle tip 1 can be flexibly bent so that the connection with the cup can be smoothly performed, and at the same time the strength as the passage is increased. Hold and have a slot at the tip and connect to the bottom of the cup. The cup is held by a holder attached to the spray gun body 7. The insertion port C is sized so that the needle 12 penetrates with an appropriate resistance. The insertion port C is inserted into the needle 12 and is attached with a bellows 14 that can ensure an appropriate flexibility and expansion / contraction amount so that the movement can be smoothly followed. It serves as a seal to prevent paint from leaking from the outlet C. Then, the dispensing of the paint is controlled by the tip of the needle 12.
The maximum diameter of each of the nozzle tip 1 and the air cap 6 is such that the inner diameter D of the metal fitting 15 is dimensionally free of play, and the nozzle tip 1 and the air cap 6 are screwed to the main body accurately at predetermined positions. Is done. The main air E is sprayed from the small hole 5 on the fan-shaped groove 3 of the nozzle tip 1 to the periphery of the paint discharge port 4, and is discharged by the air cap 2 and sprays the paint at the same time. By providing several small holes 5, air is evenly distributed around the paint outlet 4. The air supplied from the small holes 9 that change the pattern changes the pressure and flow rate by adjusting a gap between the tip of the throttle valve 10 and the A surface with a push screw or the like, and the spray is changed. The pattern is changed according to the pressure and flow rate. A fan and a circular groove are formed on both sides of A and B, and air is distributed according to the role by connecting with small holes. In actual work, there are three stages in which only air is sprayed, paint is sprayed, and both the air and paint are stopped. However, even in the structure incorporating the nozzle tip of the present invention, control by the conventional needle lever, etc. The pressure adjustment function or control of the main air can be followed, so spray work can be done without any problems.
After use, the nozzle tip 1 is removed in the reverse order of assembly, the nozzle tip 1 is replaced, and the paint cup is also replaced according to circumstances, so that the best spray gun can be prepared quickly and quickly without the need for cleaning or only by cleaning the cup.

FIG. 2 is an exploded cross-sectional view of an embodiment of the present invention, in which the insertion port C of the nozzle tip 1 and the needle 12 are connected, and the movement of the paint is controlled by the built-in paint control valve 16 by extension of the movement. The functional configuration is the same as that of the first embodiment.

FIG. 3 is an exploded sectional view of an embodiment of the present invention, in which a magnetic body 17 attached to one end of a built-in paint control valve 16 is controlled by the magnetic force of a ring-shaped magnet 18 provided at one end of a needle 12. When the magnet 18 is positioned to the left of the magnetic body 17, the paint is stopped. When the magnet 18 is in the opposite relationship, the paint is discharged. Other constituent functions are the same as those in the first and second embodiments.

Spray gun tip section exploded view (Example 1) Spray gun tip section exploded view (Example 2) Spray gun tip section exploded view (Example 3) Exploded perspective view of spray gun tip (Example 1)

Explanation of symbols

1 nozzle tip 2 paint passage 3 groove 4 paint discharge part 5 small hole 6 air cap 7 body 8 notch 9 small hole 10 throttle valve 11 groove 12 needle 13 pattern forming air hole 14 bellows 15 fastener 16 paint control valve 17 magnetic Body 18 magnet

Claims (3)

The nozzle tip is made of a solvent-resistant resin and has a structure that integrates the control valve that controls the discharge of the paint by providing a paint passage directly or in an assembled manner. A nozzle tip that eliminates the factors that cause paint to adhere to the spray gun body. When attached to the spray gun body, the control valve moves by extending the movement of the needle, paint comes out, and at the same time, air is supplied to enable spraying. A spray gun that is a tip and that incorporates it. Instead of the built-in paint control valve according to claim 1, a nozzle chip that has a structure in which the discharge of the paint is controlled by a needle penetrating one end of the nozzle chip so that the paint does not touch the spray gun body, and Built-in spray gun. A nozzle tip having the features and functions of claim 1 and claim 2, an air cap, and a paint cup integrated. And a spray gun using it.

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