JPS642430B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrostatic spray painting device that applies electrostatic force to apply a coating material to a workpiece, and particularly relates to an electrostatic spray coating device that uses a completely self-contained power source. Concerning a built-in spray gun for electrostatic spray painting equipment.

[Conventional technology]

Air atomization type and airless type electrostatic spray painting equipment spray guns are widely used for spraying paint and depositing coating materials. A typical spray gun used in the past includes an insulated body member with a grounded handle or mount located at one end and an insulated body member located adjacent to the spraying location and extending from the other end of the body member. and high voltage electrodes having selective dimensions and shapes. Such electrodes are typically charged to potentials on the order of 30 to 85 kilovolts, and in some devices as high as 150 kilovolts, creating corona discharge conditions and the associated very strong electric fields. Under these conditions, the corona discharge current flowing from the high voltage electrode creates a region at the spray location that is rich in unipolar ions that attach to and charge the spray droplets of paint or other coating material. Also, in conductive coating materials, contact charging of the spray droplets occurs in the high electric field region around the spray location. The charged droplet moves towards the grounded workpiece under the combined influence of its own inertial force and the electrostatic field present within the spray area. . According to conventional practice, at least 1970 volts/cm (5.000 volts/inch), preferably 3940 volts/inch, between the spray gun and the workpiece.
The greatest paint savings are achieved by maintaining the charging voltage as high as possible to produce an average adhesion field strength of 10.000 volts/in. Also therewith, the spray velocity near the workpiece must be minimized without compromising the requirements for sufficient spray and paint flow.

The required charging voltage is usually achieved either by utilizing a standard electronic high voltage power source located externally or by incorporating an electro pneumodynamic high voltage generator within the spray gun body. Ru. Standard electronic high voltage power sources are relatively large, heavy, and expensive, and are essentially constructed to function with "constant voltage" type characteristics. Furthermore, because of the magnitude of the potentials involved, the high voltage cables connecting such power sources to the spray gun are heavy, bulky, and relatively inflexible, adding undesirable weight to the spray gun;
Spray guns are unnecessarily large in order to insulate the high voltages associated with them, and their structures are complex, making them difficult to use in the field in many cases.

Although electro-pneumatically powered spray guns have several advantageous features compared to such standard high-voltage power sources, they are typically powered by a built-in electro-pneumatic generator. For reliable operation, they not only require the use of specially conditioned air, but also require relatively low excitation potentials of several kilovolts. It also requires the use of an external power source connected to the application head.

Avoiding reliance on preconditioned air supplies and minimizing, if not eliminating, all external power sources and associated electrical connections to electrostatic spray equipment is recommended in this area. This has been the long-standing objective of However, conflicting requirements such as high operating potential with current-limiting or constant current characteristics, utilization of conventionally available compressed air sources, and avoidance of harmful discharge potentials, combined with light weight, small size, and long-term accident-free operation, Satisfying these conflicting requirements within the conditions described above has strongly hindered the realization of the above objectives, although various solutions have been suggested.

[Problem to be solved by the invention]

The basic object of the present invention is to provide a spray gun for an electrostatic spray painting apparatus that has a completely self-contained power source.

Another object of the invention is to provide a spray gun that is small enough to be placed within a spray head assembly and that has a power source powered by compressed air.

Another object of the present invention is to provide a spray gun with a self-contained cartridge-type power source for an electrostatic spray coating device that can be easily replaced in the field.

[Means to solve the problem]

Broadly speaking, the present invention consists of a device for converting the kinetic energy of a moving air stream into continuous rotational kinetic energy, and a suitable electrical system for imparting this continuous rotational kinetic energy to an electrode arrangement of a spraying device. and a device for converting it into energy. Accordingly, the invention generally relates to an air driven low voltage synchronous generator, a rectifier/voltage regulator that converts the output of the synchronous motor to a substantially constant DC voltage input for a high frequency oscillator, and a high frequency oscillator. further increases the magnitude of the converted output voltage and increases the magnitude of the output voltage from 30 to
and a multi-stage voltage multiplier converting to a potential level of 100 kilovolts. More narrowly speaking, the present invention provides a lightweight self-contained power source consisting of a high-speed impulse low-inertia air motor that directly drives a magnetic armature low-voltage synchronous generator; A solid state rectifier which converts the output to a substantially constant DC voltage input of a high frequency oscillator adapted to provide a stepped or converted substantially square wave or sinusoidal output with a peak of approximately 2.5 kilovolts.
Using a voltage regulator and standard 5 kilovolt components, the converted output voltage of the high frequency oscillator is scaled to the 30 to 100 kilovolt level required to effectuate electrostatically enhanced deposition of coating material. This includes providing a spray gun with a built-in solid state multi-stage voltage multiplier that increases the voltage up to .

More narrowly, the present invention utilizes a conventional factory-produced compressed air source as a primary power source to provide the output voltage normally required for paint spraying and other applications at reasonably low current levels. The present invention includes a selective combination of compact and lightweight components operable within the framework of mechanical and electrical operating parameters to provide a compact and lightweight electrostatic spray gun unit.

〔effect〕

According to the present invention, a spray gun for an electrostatic spray painting apparatus is provided that is lightweight, compact, and easy to operate without requiring connection to any external power source. In other words, it is possible to obtain a spray gun for an electrostatic spray painting apparatus having a self-contained power generator that directly converts the kinetic energy of a moving air stream into electric power. The present invention also provides a self-contained high-voltage power supply that can be driven by conventional compressed air sources and is constructed from readily available components, i.e., with a current of around 50 μA. A reliable, compact, high-voltage power source that can continuously generate output voltages from 30 to 100 kilovolts and is built into a lightweight, hand-held, spray gun for spray painting equipment. It is possible to obtain a spray gun for an electrostatic spray coating device having a high high voltage power source. Furthermore, the present invention provides a spray gun for an electrostatic spray painting apparatus that uses only a conventional compressed air source and does not require any external power source. Still further in accordance with the present invention, there is provided a sprayer for an electrostatic spray painting apparatus having a cartridge-type power source consisting of an integrally assembled assembly that can be easily assembled on the job site and is individually replaceable. You can get cancer.

More particularly, the embodiments of the invention disclosed herein are spray guns for electrostatic spray painting equipment having a completely self-contained power source that requires no external power connection, and which operates at approximately 50 microamperes at 300 mA. ~100
kilovolt output, power level of approximately 3 watts, total weight of approximately 0.68 to 1,36 Kg (1.5 to 3 lb), and flow rate of approximately 5 scfm or less.
A spray gun for electrostatic spray painting equipment that can utilize conventionally available compressed air sources of ²⁰ to 80 psig.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the construction of a spray gun 10 for paint spraying and other manually operated electrostatic spray painting apparatuses according to an embodiment of the present invention. As shown in FIG. 1, spray gun 10 includes a generally cylindrical and elongated body portion 12 formed of an insulating material;
The body portion 12 is formed of a conductive material and has an upper portion.
A piston-grip handle 1 surrounding the rear end of the
4. Preferably 1.4 to 5.6 Kg/ ^cm3 or more (20 to
An air hose 16 connectable to a separate compressed air source (not shown), which may be a conventional compressed air source capable of supplying air in the pressure range of 80 psig or more, is attached to the lower end of the handle 14 through a suitable attachment member 18. It is connected to the.

As clearly shown in FIG. 1, a spray gun 10 for an electrostatic spray coating apparatus constructed according to the present invention
As a device for dispensing coating material, it is a conventional air atomizer in that it is connected to the paint supply line 38 and air hose 16 and is grounded, but is not directly connected to an external power source. This is different from the spray gun that has been used in airless electrostatic spray painting equipment. As a result, the present invention eliminates the need for a large and heavy floor-supported power source unit, as previously required, and a heavy, relatively rigid insulated cable for transmitting an externally generated charging potential to the spray gun. without,
Furthermore, there is no need for a preconditioned air supply and for the insulated cables required to transmit the excitation potential to the electro-pneumodynamically energized spray gun.

An air conduit 20 is routed within the handle 14 and is connected to a flow control valve 22 which is actuated by the spray gun user pulling a trigger 24 . The output side of the flow control valve 22 is connected to a conduit 26, and the conduit 26 is
It is fluidly connected to the first air passage 30 and the auxiliary air passage 28 within the body portion 12 . The first air passage 30 serves (in air jet spray guns of the type previously described) to deliver a stream of compressed air to the air cap assembly 32, which air is divided by air passages 34, 36. After applying the paint supply line 38 and the mounting member 40 from a remote source,
and air cap assembly 32 via conduit 42.
"Fan" that sprays the paint material sent inside
Used as air.

The structure and shape of the air cap assembly 32 for discharging coating material, and the internal construction of the air and coating material conduits therein, are the same as those used in the prior art, such as those described in U.S. Pat.
No. 3,645,447, No. 3,693,877, and No. 3,843,052 show examples of suitable structures. The electrode arrangement on the air cap 32, as well as the conductive sheath 44 wrapped around the air hose 16 for grounding the conductive handle 14, or a suitable ground conductor associated with the air hose 16, may be conventional. Anything is fine.

An elongated removable power cartridge member 45 is disposed within the barrel portion 12 of the spray gun 10 and the upper portion of the handle 14 . Cartridge member 45 constitutes a self-contained power source, includes the operative portion of the power source described below, and is generally cylindrical, with its rear portion 46 having a substantially larger diameter than its front portion 48.

When the cartridge 45 is properly inserted into the complementary shaped receiving hole within the body portion 12, the auxiliary air passageway 28 is connected directly to the inlet nozzle 50 of the compact air mover assembly 52. , the rotor 56 is driven to rotate at high speed. The air mover assembly 52 acts as a device to convert the kinetic energy of the airflow into continuous rotational kinetic energy, and the airflow passing through the air mover 52 is discharged to the atmosphere through an exhaust passage 54 at the rear of the body section 12. . The rotor 56 of the air motor 52 is mounted on a common shaft 58 with the armature 60 of an adjacent synchronous generator 62;
It forms an efficiently integrated, low inertia assembly that is rapidly accelerated to high speeds and yet has a long life. The synchronous generator 62 works as a device that converts the kinetic energy of the air motor 52 into electrical energy, and
0 is disposed within a cylindrical epoxy-coated sleeve-type stator 64, preferably of high permeability steel, around which at least one pair of coils is disposed. Preferably, air motor 52 and synchronous generator 62 form an essentially monolithic subassembly that is small and lightweight. As mentioned above, the air motor 52 and the synchronous generator 6
2, the flow path 28
The available kinetic energy of the kinetic airflow within is converted directly into electrical energy in an alternating current voltage suitably having an effective value of about 8 to 16 volts at a frequency of about 250 Hz per second.

The AC voltage output of synchronous generator 62 is introduced through conductor 68 into a rectifier 70 and voltage regulator 72 where it is converted to a substantially constant DC voltage, preferably of magnitude between about 8 and 12 volts. . The output voltage regulated by voltage regulator 72 drives a high frequency oscillator 74 to generate a low voltage sine wave or square wave output, preferably at a frequency in the range of 10 to 50 KHz. The high frequency but low voltage output of oscillator 74 is stepped up by transformer 76, which is an integral part of the oscillator circuit, to provide a square wave or sine wave output of ±2500 volts in the frequency range mentioned above.

Air motor 52, synchronous generator 62, rectifier 7
0, voltage regulator 72, oscillator 74, and transformer 76 may conveniently constitute a substantially integral subassembly forming a single element that is easily convertible after installation.

The high frequency voltage output of transformer 76 is introduced into a long chain multiplier 80, preferably a series multiplier of about 20 stages or more, which boosts the input voltage to the desired rectified output voltage of 30 to 100 kilovolts. This output voltage is passed through conductor 84 and limiting resistor 82 to an electrode assembly within air cap 32. The main portion of limiting resistor 82 may be located between the low voltage end of cartridge 45 and ground handle 14.

As previously mentioned, spray guns of the type related herein that can be used for commercial electrostatic paint spraying or other painting operations meet a practical and established framework of mechanical and electrical parameters. , or must be included therein. In general, electrostatic spray guns that can be handled by hand are
less than 1.35 kg (3 lbs), provides an operating potential of 30 to 100 kilovolts at a current level of approximately 50 microamperes, and
It is desirable to be able to operate with a source of compressed air at a pressure of 1.4 to 5.6 kg/cm ³ (20 to 80 psig). Additionally, such spray guns must include a current limiting device to prevent harmful arcing when the high voltage electrode approaches a grounded object.

Below is a self-contained power source for a spray gun that a) weighs approximately 0.23 Kg (approximately 0.5 lb), b) weighs 0.135
1.4 to 5.6 Kg/cm ³ at flow rates below m ³ /min (5 scfm)
(20 to 80 psig); c) 50 microamps with a maximum current of approximately 200 microamps in short circuit;
d) Detailed description of a preferred embodiment of a self-contained power source for a spray gun, giving a minimum output of 50 kilovolts and d) being configured as an exchangeable cartridge for convenient field use of the spraying device; do. All of these requirements allow the cartridge to be easily integrated into the interior of the spray gun, requiring a hand-held spray device, while meeting currently accepted and recognized mechanical and electrical parameters.

Air motor 52, synchronous generator 62, rectifier 70
The and voltage regulator 72 subassembly is preferably configured to provide operating characteristics such as: a) 0.135 released at atmospheric pressure
m ³ /min (5 scfm) or less using compressed air
b) a relatively constant output voltage of 5 to 10 DC volts at a power level of 5 to 8 watts from an oil-free air source of 5.6 kg/cm ³ (20 to 80 psig); b) within approximately 0.2 seconds of trigger actuation; acceleration of the air motor rotor 56 and armature 60 to reach 60-80% of full speed, and c) low weight on the order of 85 g (3 oz) and structural durability that provides an associated long operating life.

As best shown in FIGS. 2 and 3, the preferred construction of air mover 52 is an impulse air turbine system that moves through nozzle 50 at approximately 300 m/s. Approximately 300,000 airflow per minute depending on the incoming airflow
It has a lightweight rotor 56 with a diameter of about 2.5 cm that generates the theoretical maximum speed of rotation.
6 is necessary to drive the synchronous generator 62 for operation at speeds of the order of 10,000 to 30,000 revolutions per minute and, on the other hand, to obtain the desired power output from the available kinetic energy of the moving air flow. Provides high torque.

Compressed air flowing at about 4 ^scfm at a pressure of 40 psig is capable of delivering a theoretical power output of about 200 watts. The desired output of the rectifier is approximately
At 10 watts or less, the pressure drop that occurs when driving the pneumatic motor 52 and the synchronous generator 62 connected thereto can be sufficiently compensated for. In addition, the preferred impulse turbine type air motor described above does not require sliding seals and may therefore be equipped with ball bearings, oil-impregnated bushings, or other suitable materials of the type used in long-life, high-speed, dental drills and the like. Bearings can be used.

In order to obtain the desired rapid acceleration of armature 60 of synchronous generator 62, the inertia of air motor rotor 56 and armature 60 must be kept as small as possible. To this end, armature 60 preferably includes a high energy permanent magnet 100 approximately five-eighths of an inch long and one-half inch in diameter. Current knowledge indicates that magnet diameters greater than 1/2 inch (1.3 cm) create unacceptable inertial forces. Alconi 8 is the preferred material for such magnetic armatures, although Alconi 5 may also be used. As previously mentioned, the armature 60 is arranged to be substantially integral with the rotor and is provided immediately adjacent to the outside of the housing of the air motor 52.

As best shown in FIGS. 3 and 4, the stator 64 of the synchronous generator 62 is comprised of a hollow epoxy coated cylinder of high permeability alloy steel to minimize hysteresis losses in the core. A commonly available tape wound core construction is preferred and also minimizes eddy current losses. The windings of stator 64 form two coils that provide an output voltage of approximately 12 volts alternating current and a rectifier 70 and a voltage regulator 7.
2 and the impedance requirements of the oscillator 74. The entire stator/winding assembly is encapsulated as shown at 102 in FIG. 4 and is a unitary structure. The synchronous generator 62 described above is of simple and robust construction and has an operating speed of about 15,000 revolutions per minute for a quarter of a second, delivering 5 to 10 watts of power at a voltage level of about 12 volts. It features a low starting torque that can be quickly reached.

The other components of the power supply concern the essential electrical system and consist essentially of conventional circuits and circuit elements, the values of which are within the parameters mentioned above or below. selected to operate. Figure 5 shows the synchronous generator 6
A suitable circuit arrangement of a rectifier 70 and a voltage regulator 72 is shown to convert an effective AC voltage output of 8 to 16 volts of 2 to a constant DC voltage of approximately 8 to 12 volts in magnitude. As shown in FIG.
is connected to a bridge rectifier 110 consisting of a solid state diode 112. Bridge output is Zener diode 114 and filter capacitor 1
16 to provide a substantially constant DC output between terminals 118 .

As mentioned above, the high frequency oscillator 74 is
at a voltage level similar to that of a 12 volt DC input.
Preferably, it is designed to provide a square wave type output in the frequency range of 10 to 50 kilohertz. The high frequency AC output of the oscillator is converted to a square wave of up to +2500 or -2500 volts and introduced into the first stage of multiplier 80.

FIG. 6 shows such an oscillator 74 and transformer 7.
A suitable circuit diagram of 6 is shown. As shown, output terminal 118 of voltage regulator 72 is connected to resistor 120 and diode 122. The oscillator circuit includes a pair of transistors 124, 126 connected to a primary winding 128 of transformer 76. 10～
A stepped-up voltage output of approximately ±2500 volts at a frequency of 50 kilohertz is provided by the transformer secondary winding 130.

Air motor 52, synchronous generator 62, rectifier 7
0, voltage regulator 72, and transformer 76 preferably constitute a single (when encapsulated) subassembly that is replaceable as a unit to form a first single cartridge assembly.

The preferred ±2500 volt square wave output as described above of transformer 76 is applied to the input terminals of long chain multiplier 80. FIG. 7 shows a suitable circuit diagram of a multi-stage series multiplier, preferably about 24 stages, providing a 60 kilovolt output. Since the dimensions and weight of such a unit are determined by the dimensions and weight of the electrical components that form the multiplier, namely the capacitor and rectifier, by using an input of ±2500 volts, the dimensions can be reduced. Standard 5 kilovolt parts, which are small and light in weight, can be used. As shown, such a chain is preferably comprised of a plurality of stages, each formed by series connected capacitors 132 bridged by diodes 134. Although series multipliers are preferred here, any type of series or parallel long chain multiplier can be used. The multiplier is
Preferably, the subassemblies (when encapsulated) are replaceable as a unit and form a second, single cartridge.

As will be immediately apparent, all of the electronic system components, namely the air motor 52, the rectifier 70, the regulator 72, the oscillator 74, and the transformer 76, make up the first assembly; The multiplier assembly is preferably encapsulated to form part of the cartridge in a hermetically arranged composite manner and to form a separable unitary structure that is easily field replaceable. .

An air regulator assembly 148 is preferably included in the auxiliary air passageway 28 within the handle 14 to limit the voltage output and prevent overdriving of the air mover 52. FIG. 8 schematically shows a simple air conditioner assembly. As shown, a sleeve 150 is positioned within the flow path 28 that defines an elongated central hole 152 that significantly restricts the amount of air flow. A displaceable valve member 154 is mounted in the center hole 152 in the form of a cap. Base 15 of valve member 154
6 is preferably provided with a suitable O-ring 158 to prevent air leakage, and the O-ring is arranged to slide into engagement with the wall of the wide portion of the channel 28. Upper portion 1 of valve member 154
60 has a reduced width in the lateral direction, and a chamber 162 is formed around it. Chamber 1
62 is also defined by a plug 164 having a central hole 166 that restricts airflow. Plug 164 is typically positioned to limit upward displacement of valve member 154 in tight engagement with the plug by spring 168. Valve member 154 also includes a plurality of obliquely disposed channels 17.
0 is provided to allow air to flow from the center hole 152 to the chamber 162 when the depending end of the channel is not closed by the end of the sleeve 150.

In operation of the air conditioning assembly 148, the valve member 154 typically extends through the center hole 166 of the plug 164.
is starting to close. But chamber 1
When air pressure within 62 displaces valve member 154 downwardly against the biasing force of spring 168, central hole 166 is opened and channel 170 is partially or completely closed. When the channel 170 is fully or partially closed, the spring 168 will conversely control the valve member to move upwardly. It is clear that if the above-mentioned components are dimensioned appropriately, the air input to the air motor can be adjusted by limiting the upstream effective pressure to a predetermined value, regardless of the downstream channel pressure. Dew.

It should be noted that the air regulator assembly may be provided to simultaneously regulate the air flow through the first air flow path 30 and the auxiliary air flow path 28, respectively. That is, by passing both channels through the same assembly,
A valve member may be provided in each flow path, and the size of the valve opening may be appropriately controlled.

In accordance with the above principles, in a preferred embodiment:
An output of 55 kilovolts at 3 watts DC can easily be obtained from a compressed air input regulated to 1.4 kg/cm ² (20 psig) at 4.2 scfm. The following operational and physical parameters were obtained.

Air motor/synchronous generator small assembly Air input 1.4Kg/cm ² (20psig): 0.1134
m ³ /min (4.2 scfm) Output 12.1 volts rms, 8.6 watts at 250 hertz Dimensions (D x L) 3.49 cm x 3.44 cm (1.375″ x
1.355″) Weight 0.068Kg (2.4oz) Rise time 90% of rated power in less than 0.1 seconds
Rectifier/Regulator/Oscillator/Transformer Input As mentioned above Output at 20kHz and 5.4 Watts
5.1KV (peak value) Dimensions 3.49cm x 2.54cm (1.375″ x
1.0″) Weight 0.064Kg (2.25oz) (encapsulated) Voltage Multiplier Input As mentioned above Output 55KV at 3 watts DC Dimensions (D x L) 2.22cm x 12.07cm (0.875″ x
4.75″) Weight 0.113Kg (4.0oz) (Encapsulated)

[Brief explanation of drawings]

Figure 1 is a schematic side view, partially in cross section, to show the arrangement of each component of the power source arranged inside the spray gun for electrostatic spray painting equipment, and Figure 2 is the configuration of a suitable air motor. FIG. 3 is a schematic cross-sectional view showing the structure of a suitable air motor and synchronous generator assembly; FIG. 4 is an enlarged vertical cross-sectional view showing the structure of a suitable synchronous generator; FIG. is a schematic circuit diagram of a rectifier and voltage regulator, Figure 6 is a circuit diagram of an oscillator and transformer, Figure 7 is a circuit diagram of a suitable long chain series voltage multiplier, and Figure 8 is a vertical cross section of an air pressure regulator. This is a schematic diagram. 32... Air cap assembly, 52... Air motor assembly, 62... Synchronous generator, 70... Rectifier, 72... Voltage regulator, 74... High frequency oscillator, 76... Transformer, 80... Long chain voltage multiplier.

Claims (1)

Claims: 1. An apparatus for discharging an atomized coating material with the aid of a moving air stream from a remote source, and for imparting an electrical charge to said atomized coating material disposed adjacent to a spray location of said coating material. a built-in power source for providing an operating voltage to the electrode device, the device converting the kinetic energy of the kinetic airflow from the remote source into a low voltage alternating current, the low voltage alternating current being substantially constant; an oscillator for providing a high frequency, high alternating current voltage output in response to the substantially constant magnitude of the direct current voltage, and a device for converting the high frequency, high output of the oscillator into a substantially direct current, high potential current A spray gun for an electrostatic spray painting device that does not require connection to an external power source, comprising: a built-in power source with a long-chain voltage multiplier for converting and applying to the electrode device. 2. In the spray gun according to claim 1, the kinetic energy conversion device includes a turbine device that can be driven by an air flow from a compressed air source and a synchronous generator driven by the turbine device. A spray gun equipped with. 3. The spray gun according to claim 1, wherein the device for converting the low AC voltage into a DC voltage having a substantially constant voltage includes a rectifier and a voltage regulator. 4. The spray gun according to claim 1, wherein the long chain voltage multiplier is a multistage series multiplier circuit. 5. The spray gun of claim 1, wherein the alternating current voltage converter and oscillator are encapsulated to form a first unitary cartridge assembly. 6. The spray gun of claim 1, wherein the long chain voltage multiplier is encapsulated to form a second unitary cartridge assembly. 7. The spray gun according to claim 1, wherein the long chain voltage multiplier has at least 20
A spray gun is a multi-stage series multiplier circuit that includes stages. 8. The spray gun according to claim 1, wherein the coating material discharge device, the electrode device, and the built-in power source are held in a common framework. 9. In the spray gun according to claim 1, the kinetic energy conversion device is driven by the kinetic airflow to convert the synchronous generator into about 1/2.
A spray gun equipped with a turbine device that accelerates from rest to an operating speed of approximately 15,000 rpm in 4 seconds. 10. The spray gun according to claim 2, wherein the turbine device includes an impact type air motor. 11. The spray gun according to claim 2, wherein the synchronous generator driven by the turbine device includes a solid magnet armature directly connected to the turbine device. 12. The spray gun according to claim 8, wherein the built-in power source comprises a plurality of assembleable cartridges. 13. The spray gun of claim 8, wherein the total weight of the built-in power source is about 1 pound. 14. an apparatus for discharging an atomized coating material with the aid of a kinetic air stream from a remote source; an electrode arrangement for imparting an electrical charge to said atomized coating material disposed adjacent to the spray location of said coating material; A built-in power supply that supplies an operating voltage to the electrode device, which converts the kinetic energy of the kinetic airflow into low-frequency, low-voltage alternating current, and a device that converts the low-frequency voltage alternating current into approximately constant low-voltage direct current. , an oscillator that provides a high frequency alternating current voltage in response to the low direct voltage; a step-up transformer connected to the oscillator that outputs a high voltage alternating current at the output frequency of the oscillator; A spray gun for an electrostatic spray painting device that does not require connection to an external power source, comprising: a built-in power source that includes a long-chain voltage multiplier that converts the voltage into direct current and supplies the voltage to the electrode device. 15. The spray gun of claim 14, wherein the kinetic energy conversion device comprises an impulse-type rotary turbine driveable by airflow from a compressed air source and an impulse-type rotary turbine capable of driving an air flow of about 12 V at a frequency of about 250 Hz. a synchronous generator driven by the turbine to output an output voltage. 16. The spray gun of claim 14, wherein the low frequency, low voltage alternating current converting device includes a rectifier and a voltage regulator providing a direct current output voltage of about 10V. 17. The spray gun of claim 14, wherein the oscillator provides an AC output at a frequency in the range of 10 to 50 KHz. 18. The spray gun of claim 14, wherein the transformer provides an AC output of about +2500V or about -2500V. 19. In the spray gun according to claim 14, the long chain voltage multiplier has a
A spray gun that is a multi-stage series multiplier circuit that provides an output voltage in the range of 100KV. 20. The spray gun of claim 14, wherein the kinetic energy converter, AC voltage converter, oscillator, transformer, and long chain voltage multiplier are encapsulated and removable to the spray gun. A spray gun forming a single cartridge element that can be inserted into the spray gun. 21. The spray gun of claim 14, wherein the kinetic energy conversion device comprises a first unitary assembly, the alternating current voltage conversion device;
the oscillator and transformer include a second unitary assembly;
The long chain voltage multiplier includes a third unitary assembly, and the first, second and third assemblies constitute an easily assembled and dismantled cartridge. 22. The spray gun according to claim 14, wherein the long chain voltage multiplier is a multi-stage series multiplier circuit including at least 20 stages. 23. The spray gun according to claim 14, wherein the coating material discharge device, the electrode device, and the built-in power source are held in a common framework. 24. The spray gun according to claim 15, wherein the synchronous generator driven by the turbine device includes a solid magnet armature directly connected to the turbine device. 25. The spray gun according to claim 23, wherein the built-in power source comprises a plurality of assembleable cartridges. 26. The spray gun of claim 23, wherein the total weight of the built-in power source is about 1 pound. 27. A device for discharging a sprayed coating material with the aid of a kinetic air stream from a remote source and an electrode device for imparting an electrical charge to the discharged coating material, an external power source for applying an operating voltage to the electrode device. A spray gun for an electrostatic spray painting device that does not require connection with a device, comprising: a device for converting the kinetic energy of a kinetic air flow from the remote source into continuous rotational kinetic energy; A spray gun for an electrostatic spray painting device, comprising a device for converting electrical energy into electrical energy suitable for use as a power source for the spray gun. 28. The spray gun of claim 27, wherein the kinetic energy conversion device comprises an impulse type air-driven turbine device. 29. In the spray gun according to claim 27, the electrical energy conversion device is an alternating current generating device that supplies a low frequency, low voltage alternating current output, and the alternating current generating device further comprises: a device for converting a voltage of a substantially constant magnitude into direct current; an oscillator for providing a high-frequency, high-voltage alternating current output in response to the direct current; and a device for further converting the output of the oscillator into high-voltage direct current to generate the electrode device. a long chain voltage multiplier for supplying a spray gun; 30. A spray gun according to claim 27, wherein the coating material discharge device, the electrode device and both energy conversion devices are held in a common framework. 31. The spray gun of claim 27, wherein the kinetic energy conversion device is driven by the kinetic airflow to operate the alternating current generator from a rest state to an operating speed of about 15,000 rpm in about 1/4 second. A spray gun equipped with a turbine device that accelerates. 32. The spray gun of claim 28, wherein the kinetic energy conversion device further comprises an alternator driven by the turbine device to provide an alternating current voltage output. 33. The spray gun according to claim 29, wherein the long chain voltage multiplier is a multi-stage series multiplier circuit including at least 20 stages. 34. The spray gun of claim 30, wherein each energy conversion device comprises a plurality of assembleable cartridges. 35. The spray gun of claim 30, wherein the total weight of the energy conversion device is about 1 pound. 36. The spray gun of claim 32, wherein the turbine arrangement and alternator jointly operate from rest to 10,000 rpm in less than 1/4 second.
A spray gun comprising a low moment of inertia mass that can be accelerated to operating speeds of. 37. A spray gun for an electrostatic spray painting device which includes an electrode device for applying an electric charge to a sprayed coating material and is connected to a source of pressurized fluid to discharge the coating material, the spray gun being connected to a source of pressurized fluid and discharging the coating material, wherein a built-in power source connects the electrode device to a single pole. a device for converting a portion of the energy of the pressurized fluid into an alternating current voltage; and converting the alternating voltage to a high enough direct current potential for electrostatic spraying to be applied to the electrode device. An electrostatic coating spray gun equipped with a long-chain voltage multiplier. 38. The spray gun of claim 37, wherein the long chain voltage multiplier is a multi-stage series multiplier circuit including at least 20 stages. 39. A spray gun for a manually operable electrostatic spray coating device connected to a source of pressurized fluid to discharge the coating material, the spray gun including an electrode device for imparting an electric charge to the atomized coating material, the built-in power source being connected to the electrode device. a first unitary assembly for supplying a unipolar potential to the electrode arrangement, the internal power supply converting a portion of the energy of the pressurized fluid into an alternating voltage; a second unitary assembly for converting to a high direct current potential sufficient for spraying, the first and second assemblies being removable.