JPH1015442A - Coating material feed flow path of automatic manifold shaped gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily coat an exposed flow path made of Al material with anticorrosive metal by fitting an anticorrosive metal-made bush with press or driving into a coating material flow path for feeding the coating material in circulation to an automatic gun main body made of Al alloy casting via a manifold. SOLUTION: Coasing material feed circulation flow paths 1a, 1b are bored on the automatic gun main body 1 of the automatic manifold shaped gun, and a center flow path 5a for coating material is bored on a casting material 5 cast in the main body 1, and a coating nozzle is screwed at the tip and also a needle valve 9 is set on the center part. At this time, the anticorrosive metal- made bushes 3, 4 are fitted to the coating material feed circulation flow paths 1a, 1b to be made to communicate with flow paths 2a, 2b of the manifold 2 and the tip 3b of the bush 3 is airtightly force-fitted into a communication hole with the center flow path 5a for coating material. Also a recessed groove 1c is formed at the rear part fitted with the bush 3 and the airtightness of the communication part of the flow paths 2a, 2b of the manifold 2 is kept through O-rings 6, 7 fitted to the recessed groove 1c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a paint supply flow path of a manifold type automatic gun which is mounted on an automatic painting machine such as a painting robot and performs spray painting or the like.

[0002]

2. Description of the Related Art A manifold type automatic gun is a type in which a connection port of a paint joint and an air joint is collectively attached to a manifold which is separate from the automatic gun. The installation of the paint joint and the installation of the air joint are not performed in one direction, so that the connecting hose can be assembled behind the automatic gun by special parts such as an L-shaped mounting joint. However, since the automatic gun is easily stained by paint adhesion due to scattering of spray particles, it must be removed from the automatic coating machine during work or at the end of the work and always washed. At the time of this cleaning, the joint connected to the automatic gun is removed and cleaned each time. In addition, since the hoses are gathered rearward by the L-shaped joint or the like, the automatic gun has a complicated shape and has a drawback that cleaning is not easy.

[0003] A resin manifold attached to an automatic gun has an automatic gun shape to solve the above-mentioned difficulties.
As simple as possible, the paint flow path, the remote control air flow path, and the blast air flow path to be supplied to the automatic gun are perforated in the manifold, and the connection ports are arranged and arranged collectively on one surface behind the manifold. By attaching a one-touch joint or the like, hoses can be easily attached. When cleaning the automatic gun, the automatic gun alone can be easily attached and detached with a single bolt while the manifold is mounted on the automatic coating machine.The external shape of the manifold itself is also a simple shape that is easy to clean. Things.

In the above-mentioned manifold type automatic gun, the main body of the automatic gun has conventionally been manufactured by die casting or die casting of an aluminum alloy material. And
An air channel and a paint channel are directly formed in the aluminum alloy material. However, in recent years, there has been a shift from coating materials such as organic solvent-based paints and adhesives to coating materials such as water-based paints due to the reduction of VOC emissions. You have to be able to do it. This water-based coating material has a problem of corroding the aluminum material. When the water-based coating material is used for a long period of time, it is desirable to avoid using a structure in which the aluminum material is exposed in the flow path of the coating material.

In order to prevent the aluminum material from being exposed to the paint flow path, a mounting portion for screwing the paint nozzle to the automatic gun body is cast by casting a corrosion-resistant metal casting material. A paint passage is formed in the member. However, since the cast material has a cylindrical shape, when the paint flow path is drawn out of the automatic gun body, a problem arises in that the aluminum material is exposed in the flow path coming out of the cast material.

When a connection port such as a paint hose or the like is directly provided on the automatic gun with a general automatic gun which is not a manifold type, a screw joint portion of the paint joint to the automatic gun body is extended to the cast material portion. In addition, the aluminum material is prevented from being exposed by being tapered to the cast material portion. However, in the manifold type automatic gun, the problem of exposure of the aluminum material occurs because the paint joint is gathered at the rear part of the manifold.

As another conventional example, the distal end of an automatic gun and an operation control unit such as an air piston are separated into two parts, and the distal end body is made of a corrosion-resistant metal, for example, stainless steel. Although this structure is reliable, it has disadvantages that the cost is unavoidable and that the mass is heavy.

[0008]

When the coating material is supplied to the automatic gun through the paint passage of the resin manifold of the manifold type automatic gun, the paint supply flow of the automatic gun cast from an aluminum alloy material. Since the path is a flow path where the aluminum material is exposed, there is a problem of corrosion due to water-based paint or the like, so that the flow path where the aluminum material is exposed is made of a corrosion-resistant metal, for example, a stainless steel material. It is an object of the present invention to obtain a structure for covering an exposed portion as simply as possible.

[0009]

According to the present invention, there is provided a resin manifold in which an automatic gun body is made of an aluminum alloy, an air hose of an air automatic spray gun, a connection port of a paint hose, and a flow passage provided separately. In a manifold-type automatic gun in which a paint supply flow path, a needle valve operation air flow path, and a spray air flow path are provided in the manifold by being integrated with the automatic spray gun, the aluminum alloy casting is automatically performed through the manifold. Press in or insert a corrosion-resistant metal bush into the paint flow path that circulates and supplies the gun body.
This is a paint supply flow path of a manifold type automatic gun fitted and fitted.

[0010] The automatic gun body of aluminum alloy casting, which forms a paint supply channel by fitting a bush made of a corrosion resistant metal, has a paint center channel for screwing and joining a paint nozzle. An automatic gun body cast with a cast material made of a material, the paint center flow path is formed in the cast material, and the corrosion-resistant metal bush is formed in the cast material by the paint center flow path. When airtightly joined and communicated, and when joined to a separately formed manifold, the paint flow path of the resin manifold and the paint flow path formed in the bush are airtight through a packing material. This is the paint supply channel of the manifold type automatic gun that is in communication.

In the manifold type automatic gun,
If the automatic gun body (1) does not pierce the circulation return path (1b) of the paint flow path, that is, if it is manufactured as a dead end supply type automatic gun body that does not require paint circulation supply, the corrosion-resistant metal bush is , Paint supply channel (1a)
This is a paint supply flow channel that is fitted only to the.

[0012]

The operation of the manifold type automatic gun will be described with reference to FIG. In FIG. 1, a casting material (5) in which a paint center flow path (5a) for screwing a paint nozzle is screwed into the automatic gun body (1) is cast and the automatic gun body (1).
Is molded. Then, the paint supply flow path (1a) and the return path (1b) of the circulation flow path from the junction of the manifold (2) to the automatic gun body (1) are connected to the aluminum alloy material and the casting material ( Corrosion-resistant metal bushes (3) and (4) are driven or pressed into the exposed portions of the aluminum alloy material in the paint central flow path (5a) and the return path (1b). (3) The tip (3b) of (4) is air-tightly press-fitted to the casting (5) to form a paint flow path together with the central through holes of the bushes (3) and (4).

The bush (3) has a tip (3b) whose diameter is substantially the same as the diameter of the hole formed in the cast material (5), and a flange (3a) formed at the base. After the tip (3b) at the time of driving or press-fitting is air-tightly press-fitted into the communication hole of the casting material to the paint center flow path (5a), the tip (3b) is further pushed.
In order to prevent b) from protruding toward the paint central flow path (5a), the flange (3a) is joined to a step formed in the supply flow path (1a) and regulated. The collar (3a) is an automatic gun body (1)
Press-fitted or driven into the joint between the and the manifold (2) until it is flush with the bottom surface of the groove (1c), and the O-ring (6) is fitted into the groove (1c) to form an automatic gun body. The joint between (1) and the manifold (2) is sealed. The bush (4) on the return path (1b) side is also connected to the supply flow path (1).
Since the configuration is exactly the same as that of the side a), the description and the reference numerals are omitted.

With the above structure, the coating material from the supply channel (2a) of the manifold (2) flows from the through hole of the bush (3) made of a corrosion-resistant metal, for example, a stainless steel material, to the paint central channel (5a). The circulation return path circulates from the bush (4) to the return path (2b) of the manifold (2). Therefore, even when a highly corrosive water-based or acid or alkaline coating material is used, the flow path of the coating material is coated with a resin having high chemical resistance or a corrosion-resistant metal, and a highly corrosive material such as aluminum is used. Since there is no exposed portion of the material and the flow path is completely sealed, the coating material does not leak from the gap between the joints. And since the structure is constituted by simple press-fitting or driving without using screws or the like, there are few factors of cost increase, and the bush (3) (4)
Is fitted to the paint supply flow path and the paint circulation return path, so that even if there is a casting cavity generated during casting of the automatic gun, the problem of leakage from the cavity can be solved at the same time.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of the manifold type automatic gun according to the present invention, in which a bush made of a corrosion-resistant metal is fitted to the paint supply passage.
It is an expanded sectional view of the A arrow. In FIG. 1, reference numeral 1 denotes an automatic gun body of a manifold automatic gun, 2 denotes a manifold, and a casting material 5 made of a corrosion-resistant metal is cast into the automatic gun body 1. Then, a blowing air flow path is provided to the automatic gun body 1.
1g, the pattern control flow channel 1h, and the paint supply circulation flow channels 1a and 1b are perforated. A paint center channel 5a is bored in the casting material 5, and a paint nozzle 11 to be described later is screwed. A needle valve 9 is set at the center of the paint center flow path 5a. Corrosion-resistant metal bushes 3 and 4 are fitted into the paint supply circulation channels 1a and 1b, and communicate with the supply channels 2a and 2b of the manifold 2 to form air-tight channels.
Although stainless steel is used as an example of the corrosion-resistant metal, a titanium material or a brass material having poor acid resistance may be used.

In the above construction, the bushes 3 and 4 made of the corrosion-resistant metal have the same structure, and the tip 3b of the bush 3 is formed in a cylindrical shape, and the paint center channel 5a formed in the casting 5 is formed.
It is press-fitted and air-tightly fitted to the communication hole. The bush base has a flange 3a formed therein, which is fitted into a recess formed in the automatic gun body 1, and is regulated by a recessed step at the time of driving or press-fitting so that the bush tip 3b is not pressed more than necessary. . The O-ring 6,
7 is formed to receive the O-ring 6,
The airtightness of the communication portion between the flow paths 2a and 2b of the manifold 2 is maintained by 7. Thereby, the supply flow path becomes an air-tight flow path without an exposed portion of the aluminum material.

The main purpose of the fitting of the bushes 3 and 4 is to eliminate the exposed portion of the aluminum material. In addition, a casting cavity or a casting cavity generated when the automatic gun body 1 is cast. When there is a poor adhesion part formed between the material and the material, the air flow paths 1g and 1h communicate with the paint flow paths 1a and 1b, so that air enters the paint flow path, and automatic gun failure such as shortness of breath occurs. In some cases, the bushes 3 and 4 have an effect of solving this problem.

Although the present invention has been described with reference to a manifold type automatic gun having a paint supply circulation channel, a case where the manifold type automatic gun supplies paint by a dead end system having no paint circulation channel, for example, paint, etc. In the case of an automatic gun for exclusive use of a paint which does not require circulation supply because there is almost no sedimentation of the coating material, that is, an automatic gun body which does not perforate the circulation return path 1b, the paint supply flow path is naturally 1a Only one bush fits.

FIG. 2 is a sectional view showing the overall structure of the manifold type automatic gun. In FIG. 2, reference numeral 11 denotes a paint nozzle screwed to the automatic gun body 1, and an air cap 12 surrounding the paint nozzle 11 and tapered and attached thereto is attached to the body by an air cap cover 13. The air cap 12 is formed with a central air hole 12b which is mainly used to atomize the paint by an air jet from a ring-shaped slit formed on the outer periphery of the tip of the paint nozzle 11. Then, a flat pattern is formed by spraying in a fan shape by the side air holes 12a from the corners of the air cap 12.
The side air hole 12a is provided between the paint nozzle 11 and the air cap 1.
The air flow paths of the center air hole 12b and the side air holes 12a are cut off at the tapered joints 2 so as to be independent flow paths. Therefore, the opening of the fan-shaped spray pattern forming a flat pattern is changed according to the strength of the air jet from the side air holes 12a. The needle valve 9 slides at the nozzle opening of the paint nozzle 11, and the reciprocating movement of the needle valve 9 constitutes the tip of an automatic gun that opens and closes the stoppage of paint ejection.

At the rear of the automatic gun body 1, an air piston 1 for opening and closing the needle valve 9 by remote control is provided.
4 is airtightly slidably fitted into a cylinder 1e formed in the main body 1. The air piston 14 has a center through-hole for operating the needle valve 9, and an air valve 14 a at the left end of the air piston is attached to an air valve seat 15 fitted to the main body 1 by an air piston spring. 1
6 is a pressing sheet. Therefore, the air piston 14 also serves as the operation of the needle valve 9 and the role of the air valve. A spring receiver 17 is screwed to the right end of the needle valve 9, pressed by a needle valve spring 18, and is pressed against the nozzle port of the paint nozzle 11 by a taper at the tip of the needle valve. At the right end of the automatic gun body 1, a paint ejection amount adjusting device 19 is set on a spring retainer 20 and screwed to the body 1. The paint adjusting knob 21 of the paint ejecting amount adjusting device 19 set on the spring retainer 20 is moved left and right by turning the knob, and the right end of the needle valve 9 comes into contact with the adjusting rod 21a, and the needle valve 9 is replaced. And the amount of paint sprayed is adjusted by the opening of a needle valve that slides on the nozzle opening of the paint nozzle 11.

The operation of the air piston 14 is performed by air introduced from the air passage 1f for operating the air piston formed in the manifold 2 and the blowing air passage 1g.
With the control from the central control panel, the air for operating the air piston
When the air is introduced from the flow path 1f, the air piston 14 operates, the air valve 14a is opened, and the air in the blowing air flow path 1g is sent to the tip of the automatic gun. After the air valve 14a is opened, the air piston 14 comes into contact with the needle valve spring receiver 17 fixed to the needle valve 9 disposed at intervals of several mm, the needle valve 9 is pulled, and the paint is ejected. . That is, the paint is ejected after the air is injected, and when the paint is closed, the air valve is closed after the ejection of the paint is stopped.

Manifold 2 joined to automatic gun body 1
The automatic gun body 1 is provided by a single hexagon socket head bolt 22.
Is to be fixed. Manifold 2 contains
A working air flow path 2f communicating with a working air introduction port 1f that operates the air piston 14, a blowing air flow path 2g communicating with a blowing air introduction port 1g, and a pattern adjustment communicating with a pattern adjustment flow path 1h of the automatic gun body 1. The flow path 2h is perforated, and the air supplied to the automatic gun main body 1 from the pattern adjustment flow path is adjusted by the pattern adjustment valve set 25, and fine adjustment of the pattern adjustment at hand of the automatic gun is performed. The paint supply flow paths 2a and 2b are perforated in parallel below the pattern adjustment flow path 2h. A through hole 2i provided in the manifold 2 is a holder hole for mounting on an automatic coating machine, and is fixed to a mounting rod or the like inserted by a fixing bolt 23. FIG. 1 shows a connection between the outlets of the flow paths of the manifold 2 and the inlet flow path of the automatic gun body 1.
As in the case of the O-rings 6 and 7, indicated by O, O-rings are fitted into the respective O-rings and sealed from outside air. Therefore, at the time of maintenance, the one hexagon socket head cap screw 2
The automatic gun can be easily removed simply by loosening 2. A joint connection screw is cut on the rear surface of the manifold 2.

[0023]

According to the manifold type automatic gun, the exposed portion of the aluminum material is eliminated by driving or press-fitting a bush made of a corrosion-resistant metal into the paint flow path to be circulated to the automatic gun body, thereby preventing corrosion resistance and corrosion resistance. An automatic gun having high chemical properties can be obtained, and a low-cost manifold-type automatic gun can be obtained by a simple processing method of fitting a bush.

Further, by fitting the corrosion-resistant metal bush to the aluminum alloy casting automatic gun body, even if there is a casting nest generated at the time of casting, there is a paint supply flow path structure in which the problem of the nest can be ignored. There is an effect.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2, in which a bush is fitted in a paint supply flow path of a manifold type automatic gun according to the present invention.

FIG. 2 is a cross-sectional view showing the overall configuration of a manifold type automatic gun embodying the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic gun main body 1a Paint supply flow path (automatic gun side) 1b Paint circulation return path (automatic gun side) 2 Manifold 2a Paint supply flow path (manifold) 2b Paint circulation return path (manifold) 3,4 Bush 3a Flange (bush) 3b Tip (Bush) 5 Casting material 5a Paint center flow path 6, 7 O-ring 9 Needle valve 11 Paint nozzle 12 Air cap 19 Paint ejection amount adjustment device 22 Hexagon socket head cap bolt 25 Pattern adjustment device

Claims (4)

[Claims] 1. A resin manifold having an air hose, a paint hose connection port, and a flow path formed separately from the automatic spray gun whose automatic gun body is cast of an aluminum alloy, is attached to the automatic spray gun. Unite,
In a manifold type automatic gun in which a paint supply flow path, a needle valve operation air flow path, and a blowing air flow path are perforated in the manifold, a circulation supply to an aluminum alloy casting automatic gun body (1) is performed through a manifold (2). Corrosion resistant metal bush (3) in the paint passages (1a) (1b)
(4) A paint supply flow path of a manifold type automatic gun into which a press-fitting or a press-fitting is performed. 2. An aluminum alloy cast automatic gun body (1) for forming a paint supply channel by fitting a corrosion-resistant metal bush into a paint center channel (5a) for screwing and joining a paint nozzle. ) Is an automatic gun main body (1) in which a corrosion-resistant metal casting material (5) is cast, wherein the paint center flow path (5a) is perforated in the casting material, and the corrosion-resistant metal bush is formed. (3)
2. A paint supply flow path for a manifold type automatic gun according to claim 1, wherein (4) is airtightly joined to and communicates with a paint center flow path (5a) formed in said casting material (5). 3. A resin manifold (1) in which an automatic gun body (1) having a paint supply channel formed by fitting a corrosion-resistant metal bush is joined to a manifold (2) formed separately. 2. The manifold type automatic gun according to claim 1, wherein the paint flow passages (2a) and (2b) and the paint flow passages (1a) and (1b) formed in the bush are air-tightly communicated via a packing material. Paint supply channel. 4. In a manifold type automatic gun, when the automatic gun body (1) is a dead end supply type automatic gun body that does not pierce the circulation return path (1b) of the paint flow path, the corrosion-resistant metal bush is , Paint supply channel (1a)
Paint supply channel fitted only to