WO2006132306A1

WO2006132306A1 - Applicator

Info

Publication number: WO2006132306A1
Application number: PCT/JP2006/311494
Authority: WO
Inventors: Takao Nomura; Shigeyoshi Inada; Takao Ueno; Takanobu Mori; Kengo Honma; Akira Kato; Yasushi Ogawa
Original assignee: Trinity Industrial Corporation; Toyota Jidosha Kabusiki Kaisha
Priority date: 2005-06-09
Filing date: 2006-06-08
Publication date: 2006-12-14
Also published as: JP2006341199A

Abstract

An applicator capable of securely pushing out paints and the other coating materials by a small drive force without slidably moving a bottom plate by using a coating material bag, eliminating the troublesome disassembly and cleaning of the applicator by removing the bottom plate, and neatly squashing the coating material bag without being bent or broken. The applicator comprises a coating material push-out chamber (4) pushing out the coating material while squashing the coating material bag by acting, from the outside, the hydraulic pressure of a working fluid on the coating material bag (8) for filling the coating material having a coating material access port (8a) formed at the tip thereof. The applicator also comprises a reinforcement material (20) holding the rear end of the coating material bag (8) so that the coating material bag (8) is not squashed in such a longitudinal direction that connects its tip to its rear end by the hydraulic pressure of the working fluid.

Description

Specification

Coating machine

Technical field

TECHNICAL FIELD [0001] The present invention relates to a coating machine provided with a coating material pressurizing mechanism that presses a pre-filled coating material against an atomizing mechanism, and more particularly to an electrostatic spraying device that electrostatically atomizes conductive paint such as aqueous paint. It is suitable for application to a coating machine.

Background art

[0002] Paints using organic solvents are the mainstream for painting automobile bodies, but from the viewpoint of environmental protection and pollution prevention, reducing volatile organic solvents generated in large quantities in the painting process! As a countermeasure, painting with water-based paint is attracting attention.

[0003] In order to use a water-based paint without waste, it is preferable to apply it with an electrostatic coating apparatus having a high coating efficiency. However, the water-based paint has a low electrical resistance and is electrostatically passed through a paint flowing through a paint supply system. Since the rotary atomizing head of the coating machine and the ground side are easily connected, insulation measures are applied to the entire paint supply system and applied to the rotary atomizing head—a high voltage of 60 to 90 kV must be prevented from leaking. I must.

[0004] For this reason, conventionally, a paint filling tank that is formed in a coating machine or is detachably attached to the coating machine is filled with paint, and the paint is pressed out from the tank cover and applied. The paint supply system is electrically cut off to prevent leakage even when a high voltage is applied to the coating machine.

Patent Document 1: Japanese Patent Laid-Open No. 2000-317354

[0005] In this type of electrostatic coating machine, a bottom plate that serves as a piston is usually slidably disposed along the inner peripheral surface of a paint tank that serves as a cylinder, and the bottom plate is used as a liquid for other vacuum cleaners. The paint is pressed out by pressure.

[0006] In this case, however, the bottom plate and the inner peripheral surface must be securely sealed! For this reason, the friction is increased by that amount and a large driving force is required, and the seal is rubbed and worn each time the bottom plate reciprocates. Goods May adversely affect quality.

[0007] In addition, the normal seal has a configuration in which a plurality of O-rings are arranged in parallel on the outer peripheral surface of the bottom plate serving as a piston, so that paint enters between the O-ring and the O-ring, When cleaning was completed after one day of work, the bottom plate had to be removed and disassembled for cleaning.

[0008] For this reason, the present applicant provides a paint (coating material) bag for filling the paint (coating material) in the paint filling tank, and causes the hydraulic fluid to flow outside the paint bag by the hydraulic pressure. A coating machine (coating machine) that crushes the paint bag and presses the paint was prototyped.

[0009] According to this, when the coating material bag is filled with the coating material in advance and the working fluid is allowed to flow into the coating material pressurizing chamber, for example, in a fixed amount, the coating material bag is crushed by the fluid pressure, and the coating material is fixed. Extruded and supplied to the atomization mechanism.

Therefore, since there is no influence of friction due to the O-ring, the pressure of the hydraulic fluid acts on the coating material as it is, and the coating material can be supplied to the atomizing mechanism with a relatively small driving force. In addition, since the bottom plate that serves as the piston is not used, there is no gap between the bottom plate and the coating material press-out chamber, and cleaning can be performed easily, resulting in poor coating due to poor cleaning or seal leakage from the bottom plate. Is gone.

[0010] When the coating material bag is crushed by supplying the working fluid while the pressure is applied, if the hydraulic pressure of the working fluid acts toward the tip side of the coating material node, the coating material A new problem arises that the bag is easily torn because it is squeezed, folded, or creased to the front end. Disclosure of the invention

Problems to be solved by the invention

[0011] Therefore, the present invention uses the coating material bag to reliably press out paint and other coating materials with a small driving force without sliding the bottom plate, and removes the bottom plate and disassembles and cleans it. The technical problem is to provide a coating material-filling type coating machine that eliminates the hassle of carrying out the process and at the same time allows the coating material bag to be crushed cleanly without being cramped or folded.

Means for solving the problem

[0012] In order to solve this problem, the present invention provides a pre-filled coating material for an atomizing mechanism. In the coating machine provided with the coating material pressure-out mechanism that presses out the coating material, the coating material pressure-out mechanism includes a coating material bag for filling the coating material in which a coating material inflow / outlet is formed on the leading end side. A coating material press-out chamber is provided for pressing the coating material in the coating material bag by compressing and crushing with hydraulic pressure, and the coating material bag is connected to the front end side and the rear end side by the hydraulic pressure of the working fluid. It is characterized in that a reinforcing material for holding the rear end side of the coating material bag is provided so as not to be crushed in the direction!

The invention's effect

[0013] In the coating machine according to the present invention, when the working fluid is quantitatively introduced into the coating material press-out chamber in a state where the coating material bag is previously filled with a coating material such as a coating material, the working fluid bag is caused by the fluid pressure. The coating material bag is crushed and crushed, and the coating material is squeezed out in a fixed amount and supplied to the atomizing mechanism.

[0014] Thus, by supplying the working fluid, the coating material bag is crushed and the coating material is squeezed out, so that the pressure of the working fluid acts on the coating material as it is, and friction of seals such as O-rings. The coating material can be supplied to the atomization mechanism with a relatively small driving force without being affected by the above.

In addition, since the bottom plate that serves as the piston is not used, there is no gap between the bottom plate and the coating material press-out chamber, and cleaning can be performed easily, resulting in poor coating due to poor cleaning or seal leakage from the bottom plate. It has a good effect.

[0015] Furthermore, the rear end side of the coating material bag is held by a reinforcing material such as a support so that the coating material no longer collapses in the longitudinal direction connecting the front end side and the rear end side! / Therefore, when the hydraulic pressure of the working fluid acts on the outside of the coating material bag, the coating material bag is neatly crushed in a direction perpendicular to its longitudinal direction without being cramped, broken or wrinkled. Is done.

Therefore, the paint in the coating material bag can be pressed out without waste, and the cleaning performance is excellent.

BEST MODE FOR CARRYING OUT THE INVENTION

In the present invention, by using the coating material bag, the coating material and other coating materials can be surely pressed out with a small driving force without sliding the bottom plate, and the bottom plate is removed and disassembled and washed. The purpose of making it possible to eliminate the troublesomeness of the coating material and to be able to be neatly crushed without crushing or folding the coating material bag was achieved with an extremely simple configuration.

Hereinafter, a coating machine according to the present invention will be specifically described with reference to the drawings.

FIG. 1 is a cross-sectional view showing an example of a coating machine according to the present invention, FIG. 2 is an explanatory view showing the operation of a paint press-out mechanism, FIG. 3 is an explanatory view showing another example of a reinforcing material and a paint bag, and FIG. Is a perspective view of the reinforcing material, and FIG. 5 is an explanatory diagram showing the shape of the reinforcing material and how the paint bag is crushed.

[0018] Electrostatic coating machine (applicator) 1 shown in Fig. 1 performs electrostatic coating of conductive paint (applying material) such as water-based paint, and rotationally atomizes the paint on the front end side of airframe 2. A rotary atomizing head (atomizing mechanism) 3 is disposed, and a paint (a coating material) supplied to the rotary atomizing head 3 by extruding a pre-filled paint at the rear end side with the hydraulic pressure of the working fluid. A cylindrical paint filling tank (applying material press-out chamber) 4 having a press-out mechanism P is detachably mounted.

The rotary atomizing head 3 is attached to a tubular rotary shaft 6 of an air motor 5 disposed in the airframe 2 and is driven to rotate at a high speed, and a high voltage supplied from a high voltage generator 7 is applied to the rotary atomizing head 3. The atomized paint particles are charged on the opposite side of the object to be coated.

[0020] The paint pressurizing mechanism P is a paint (coating material) bag in which a coating material inflow / outlet port 8a is formed at the front end side in the coating material filling tank 4 serving as a coating material pressure chamber having an inner surface formed on the inner circumferential surface of the cylinder. 8 is arranged, and the inside of the paint bag 8 is filled with paint, and the outside of the paint (coating material) bag 8 is formed in the working fluid chamber 9 and filled with working fluid.

Accordingly, when the hydraulic fluid is supplied to the hydraulic fluid chamber 9 while the paint bag 8 is filled with the paint, the paint bag 8 is crushed by the hydraulic pressure, and the paint is pressed out to the rotary atomizing head 3.

[0021] The paint filling tank 4 is formed with a joint 10A connected to the applicator T on the tip side. The joint 10A includes a paint inflow / outflow port 11 communicating with the paint bag 8, and an operation. A hydraulic fluid inflow / outflow port 12 communicating with the fluid chamber 9 is formed, and each of the ports 11 and 12 is provided with stop valves 11 and 1 2 that are closed except when the joint 10A is connected to the applicator T or the like. It has been.

The joint base 10B on the machine body 2 side is provided with a paint port 13 and a hydraulic fluid port 14 that are engaged with the ports 11 and 12 in a state where the paint filling tank 4 is mounted on the machine body 2. Joints 10A and 10B are engaged and applied to ports 11-14. When the material filling tank 4 is mounted on the airframe 2, stop valves 15 to 18 are provided for opening the respective ports.

[0022] Further, in the paint bag 8, the reinforcing material that holds the rear end side so that the paint bag 8 is not crushed in the longitudinal direction connecting the front end side and the rear end side by the hydraulic pressure of the working fluid! As shown in the figure, a column 20 is provided.

The support column 20 is formed in a flat plate shape as shown in FIG. 2, and is formed by attaching a cylindrical mouth portion 20a having a thickness that can be fitted to the paint inflow / outlet port 8a to one end side. Arranged along the longitudinal direction connecting the sides!

Further, a hydraulic fluid guide nozzle 21 extending into the hydraulic fluid chamber 9 is disposed from the hydraulic fluid inflow / outflow port 12, and the hydraulic fluid flow ports 21a are provided on both the front end side and the rear end side of the paint press-out chamber 8. 21b is formed.

Furthermore, the paint port 13 on the machine body 2 side is connected to a paint supply flow path 22 for guiding the paint discharged from the paint filling tank 4 to the rotary atomizing head 3, and the working fluid port 14 is supplied with working fluid. Supply Z Discharge hydraulic fluid distribution path 23 is connected.

[0023] In this way, since the paint filling tank 4 has the working fluid 9 on the outside with the paint bag 8 as a boundary, when the working fluid is introduced from the working fluid inflow / outflow port 12, the fluid pressure is reduced. The outer cover of the coating bag 8 acts and the coating bag 8 is crushed and the coating is pressed out.

[0024] If the paint bag 8 is formed in a tube shape having a size and volume substantially equal to the paint filling tank 4, the paint bag 8 is almost empty when the working fluid chamber 9 is filled with the working fluid. Thus, when the paint bag 8 is filled with paint, the working fluid in the working fluid chamber 9 is almost empty.

If the inner side of the paint filling tank 4 is formed on the inner peripheral surface of the cylinder, the crease will not crease even when pressed against the inner surface of the paint bag 8 force S tank 4.

[0025] Reference numeral 24 denotes a cleaning flow path for cleaning the inside of the coating machine 1 and the rotary atomizing head 3. The cleaning connector connection port 25 formed on the peripheral surface of the machine body 2 is connected to the stop valve of the paint port 14. When the paint filling tank 4 is not attached, it communicates with the paint supply flow path 22 via the stop valve 18.

The above is one configuration example of the present invention, and the operation thereof will be described next. Various operating air pipes, exhaust pipes, and power cables (all not shown) are connected to the body 2 of the electrostatic coating machine 1, and this electrostatic coating machine 1 is attached to a living arm such as a painting robot (not shown). Install.

The paint bag 8 is pre-filled with paint, the joint 10A of the paint filling tank 4 is engaged with the joint base 10B and attached to the body 2, and the rotary atomizing head 3 is driven to rotate at high speed by the air motor 5. Then, turn on the high-voltage generator 7 to apply a high voltage, and move the coating machine 1 to any coating position.

[0027] Here, when a constant amount of hydraulic fluid is supplied from the machine body 2 to the paint filling tank 4 via the hydraulic fluid passage 23, the hydraulic fluid is supplied into the hydraulic fluid chamber 9, and the paint pressure is applied by the hydraulic pressure. Since the bag 8 is crushed, the paint is quantitatively supplied through the paint supply channel 22 and electrostatically atomized by the rotary atomizing head 3.

In this case, even if the conductive paint is used, the paint is filled in the paint bag 8 and is not electrically connected to the outside through the conductive paint, so that a high voltage leaks. Therefore, it is not necessary to take insulation measures for the paint supply system (not shown) that fills the paint filling tank 4 with paint.

[0028] In addition, a support column 20 as a reinforcing material is inserted into the paint bag 8 so that the rear end side does not approach the front end side! / Therefore, even when the hydraulic pressure of the hydraulic fluid is applied to the paint bag 8, the paint bag 8 is not crushed in the longitudinal direction connecting the front end side and the rear end side, and is in close contact with the support column 20. It will be crushed.

As a result, the paint bag 8 can be crushed cleanly without being cramped, broken or wrinkled, and the paint can be pushed out without waste.

[0029] Therefore, instead of sliding the bottom plate of the paint tank and starting to press the paint as in the prior art, the paint bag 9 is crushed and pressed out by flowing the hydraulic fluid into the outside of the paint bag 9. Therefore, there is an effect that the pressure of the working fluid acts on the paint as it is, and the paint can be pressed out with a relatively small driving force.

In addition, since the paint is filled in the paint bag 9 and completely separated from the working fluid, it is not necessary to provide a seal that prevents them from mixing with each other. In addition, there are no gaps for paint to enter. If cleaning can be performed easily, there is an effect.

FIG. 3 shows another example of the reinforcing material and the paint bag.

The paint bag 31 has a gusset that heat-seals its edges in a state where the resin films are stacked so that the abdominal surface 31a and the back surface 31b are in close contact with each other due to external pressure and are flattened (see Fig. 3 (a)). The pipe member 32 is provided at the paint inflow / outlet.

In this state, when an external pressure is applied to the paint bag 31, the abdominal surface 31a and the back surface 31b come into close contact with each other. However, if the reinforcing material is thinner than the pipe member 32, a crease can be formed at that boundary as shown in FIG. There is.

Therefore, in this example, as shown in FIG. 4, the support 33 serving as the reinforcing material is attached to the pipe member 32 serving as the paint inlet / outlet of the paint bag 31 and the side force of the attachment source 33a is also directed toward the tip 33b. The pipe member 32 is formed in a substantially rounded conical shape that gradually tapers from the outer diameter of the pipe member 32, and the peripheral surface 34 of the column 33 guides the paint to the pipe member 32 along the longitudinal direction of the left and right side surfaces. The guide groove 35 is formed, and the front and rear peripheral surfaces 34 without the guide groove 35 are inserted in a direction in close contact with the abdominal surface 31a and the back surface 31b of the paint bag 31.

[0032] Thus, when the hydraulic fluid is supplied and the paint bag 34 is crushed and the paint is pushed out, the abdominal surface 31a and the back surface 31b of the paint bag 31 are brought into close contact with the peripheral surface 34 of the support 33, and the root 33a is connected to the pipe. Since it is equal to the outer diameter of the member 32, there is no crease at the pipe member 32 (see FIG. 5 (b)).

Even if the abdomen 31a and back 31b of the paint bag 31 are in close contact with the peripheral surface 34 of the column 33, the guide groove 35 is formed along the side, so that almost the entire amount that the paint flow does not stagnate is used. Can be cut off.

[0033] In the above description, the force described in the case where the struts 20 and 33 are arranged as the reinforcing material is not limited to this. The present invention can hold the rear end side so as not to approach the front end side. In this case, an arbitrary shape can be used. For example, an arch-shaped support may be used. Further, the reinforcing material is not limited to the case provided in the paint bags 8 and 31, but the paint pressure chamber. 8 is provided with a hook etc., and the rear end side of the paint bag 8 and 31 is hooked on this. good.

Industrial applicability

[0034] The present invention is suitable for use in an applicator of the type that crushes the coating material bag from the outside of the flexible coating material bag filled with the coating material in advance by the hydraulic pressure of the working fluid and presses the coating material. .

Brief Description of Drawings

FIG. 1 is a cross-sectional view showing an example of a coating machine according to the present invention.

FIG. 2 is an explanatory view showing an example of a reinforcing material.

FIG. 3 is an explanatory view showing another example of a reinforcing material and a paint bag.

FIG. 4 is a perspective view of a reinforcing material.

FIG. 5 is an explanatory diagram showing the shape of the reinforcing material and how the paint bag is crushed.

Explanation of symbols

[0036] 1 Electrostatic coating machine (coating machine)

2 Airframe

3 Rotary atomization head (Atomization mechanism)

P Paint (coating material) pressurization mechanism

4 Paint filling tank (Paint press-out chamber)

8, 31 Paint (coating material) bag

20, 33 support (support)

Claims

The scope of the claims

[1] In a coating machine equipped with a coating material press-off mechanism that presses a pre-filled coating material against an atomization mechanism,

The coating material pressing mechanism is configured to crush and crush a coating material bag for filling a coating material having a coating material inlet / outlet formed on the front end side by applying hydraulic pressure of the working fluid from the outside thereof. The coating material bag has a coating material pressurizing chamber that pressurizes the coating material inside, and the coating material bag is not crushed in the longitudinal direction connecting the leading end side and the trailing end side by the hydraulic pressure of the working fluid! An applicator characterized in that a reinforcing material for holding the rear end side of the applicator is provided.

[2] The support member is a support force that is attached to the coating material inflow / outflow port, and the support material is inserted in the coating material bag and arranged along the longitudinal direction connecting the front end side and the rear end side. The coating machine described.

[3] The coating material press-off chamber provided with the above-mentioned coating material bag is formed in a coating material filling tank that is detachably attached to the airframe having an atomizing mechanism. Coating machine.

[4] The conductive material such as a water-based paint is used as the coating material, and the atomization mechanism is an electrostatic atomization mechanism that atomizes the paint and charges it to the opposite electrode to the object to be coated. 3. The coating machine according to 3.

[5] The applicator according to claim 2, wherein the support column is formed so as to taper from a mounting source side to a front end side, which is mounted to the coating material inflow / outflow port.

6. The applicator according to claim 2, wherein a guide groove is formed on a side surface of the support column to guide the paint to the application material inflow / outlet along the longitudinal direction thereof.

7. The applicator according to claim 1, wherein the applicator bag is formed by sealing the edge of the applicator bag in a state where the resin film is stacked so that the applicator bag is flattened by an external pressure.