DE2209231A1 - Device for electrostatic charging and application of powdery and granular material, in particular powdery paint and other covering material - Google Patents

Description

Tranemo Pärgfabrik AB, Limmaredsvägen 2, Tranemo, Sweden.

"Device for electrostatic charging and application of powdery and granular material, especially powdery Color and other covering material "

The present invention relates to one set forth in the introduction of Claim 1 specified device "

Previously, such devices included a high-voltage generator, which causes an electrostatic charging of a powder cloud via a high-voltage electrode, which is generated by a Compressed air flow is generated, which continuously powder from a storage container via hose lines through a Pistol transported out.

Such a device or procedure is satisfactory, apart from the fact that the electric equipment is very good is expensive. These costs are so high that some companies have previously had to refrain from making such an acquisition.

The object of the present invention is primarily the elimination the above disadvantages and the creation of a device which is cheap to purchase and operate without this Advantages entail a noticeable deterioration in the occupancy properties of the device.

This object is achieved according to the invention in that a device of the type mentioned essentially as in the characterizing Part of claim 1 specified is constituted.

Other features and advantages of the invention emerge from the following Description with reference to the accompanying drawings. Show on these:

Pig. 1 a device according to the invention in a long section

Pig. 2 a turbulence organ according to the invention in a side view,

Pig, 3 this «organ of tarbulence from the left in Pig. 2 seen

PiC. 4 a storage container according to the invention for connection to the device according to Pig. 1 in a schematic Side view and

Pig. 5 the same container from the right in Pig. 4- seen.

2 0 9 8 A 1/0 6 7 0 bad origin * «,.

In the drawings, t> denotes a pistol handle, the rear upper area of which is provided with a nipple 7 for connection to a feed line 26 for the compressed air powder mixture. A spring-loaded valve piston S is connected to the 11 ippel i3t in the handle and seals against a seat 11 in the rest position. Senamite rest position can be canceled by a push-button 3, which is pivotably mounted in the front upper handle area and is provided with a tappet 4 resting against the valve piston through a bore 12 on the valve piston. Following the valve seat 11, a connecting channel 13 protrudes upwards.

On your upper handle end is preferably a relative long tube 10 arranged with a length of, for example, 30 cm. This is preferably circular in cross section and consists of thin-walled PVC plastic. The thickness is, for example 1 a 2 ma, the inside diameter e.g. 3 a 4 cm.

This tube preferably protrudes backwards over the handle and is attached to this with an inner plate 3 or otherwise. The rear end of the pipe is closed by an end piece 9.

In the connecting channel 13 is one end of an angular tube 2 with in relation to the connection channel, for example slightly reduced inner diameter used. This V / inkelrohr is passed through the gun barrel and opens with its other end, preferably coaxially in this from the opening facing forward. The Y / inkelrohrmündungsbereiqh in The gun tube is sealingly surrounded by a ring packing or the like that also seals the inside of the gun tube. 14th

Between the muzzle of the barrel and the front end of the gun barrel a turbulence insert 1 is arranged in the gun tube, which can have the shape of a pressed-in cylinder body, whose end facing the cylinder tube taper conically can. According to the version shown, sf ο rm is the operational periphery with spiral grooves 15, e.g. four, provided, .velche can be parallel to each other and approximately semicircular Have cross-section. The hats close an "angle of z" B. 30 ° with the longitudinal axis of use. Use is preferred

2098A1 / 0670 _S ad original

wisely made from plastic.

The inventive device works as follows: The Uippel 7 is via hose lines or the like. connected to a compressed air source and a storage container for in particular powdery covering material. If the operator now presses the trigger against the pistol handle, the valve piston is moved from the seat against the spring and air pressure and the compressed-air-powder mixture flows through the connecting channel and the inner tube into the pistol tube to the turbulence insert. This is passed τοπ called mixture over the spiral grooves, which give the stream an intense torrential movement, which is most intense along the inside wall of the pistol barrel. This creates a relatively strong friction between the items to be covered, the air flow and the wall of the pistol cover channel. This friction creates sufficient electrostatic charging of the items to be covered, which, after leaving the opening of the gun window, adheres to the object to be covered without being charged by means of special electrical equipment. Of course, this does not prevent electrical charging devices from being fitted as additional equipment in special cases, if this is desired.

Described and shown embodiments are only as Non-limiting examples and to some extent as solutions in principle. Modifications and additions are always included the following claims are conceivable.

The grooves 15 do not need to be arranged in the periphery of the turbulence insert. At least in sections spiral, More centrally discharging channels at one or both ends of the insert are conceivable. A certain divergence from the Zentruoiacb.se and pistol barrel muzzle is always welcome. Furthermore, the iiuten or the like. 15 advantageous relatively flat and be wide in cross-section, as the earliest possible contact between the material to be covered and the gun barrel Stage is desired. The front end of the turbulence insert can also be conical or in diameter over a longer axial distance be reduced so that a further friction surface is created. IIa: i can go so far as to get a coaxial ι Cylinders of any length in front of the Turbulenzeinsatζ

2098A1 / 0670

arranges. So an annular channel is formed in front of it. "Anyone Length "means that the cylinder is shorter, same length

or longer than the gun barrel in relation to its muzzle can be. The front end of the gun barrel and / or barrel can also diverge or converge for the purpose of Creation of an optimal spread with respect to the object to be covered. The cylinder can advantageously be a thin-walled plastic tube be.

The possible cylinder and / or the gun barrel can be provided with surface patterns or profiles, e.g. corrugations, which completely or partially cause the torrential movement of the stream, so that an actual turbulence start can possibly be saved. With central air flow introduction however, some form of central insert into the gun barrel is desirable, such as a combination of said cylinder and a turbulence insert, which may open up a closed ring channel between itself and the gun barrel. Here kanrjdäer cylinders connected to the gun barrel, e.g. through narrow spiral ribs. On the other hand, a central Use can possibly be completely saved if the air flow is fed in peripherally. Said profiles or the like. can instead of or in addition to a leadership function (generating or supporting the torrent movement) also have another Have function, namely friction increase, what for example by mainly arranged transversely to the direction of flow corrugations or the like. can be achieved, which is preferably relative are small, so that the current intensity has a negative effect Vortices cannot arise.

Electrostatic charging of the gun barrel is also conceivable, which is transferred to the material to be covered in the air stream. Such charging can be done externally, i.e. by means of a friction device placed on the outside of the gun barrel, which by means of an organ running around the gun barrel or reciprocating the charge by friction with the Gun barrel outside causes.

Another way to lend the load entrained compressed air stream a Torrsionsbewegung is in the

2098A1 / 0670

rotatable arrangement called insert or cylinder. The rotation can either adjust the flow of compressed air itself or "special" Driving organs for rotating the insert or cylinder happen.

In Pig. 4 and 5 a gate container 21 is shown with complete feeding equipment. In the funnel-shaped upper part 22, covering material can be filled, which passes via a regulating device 23 on the funnel bottom to a fan _{or the like} 24 for the purpose of further conveyance to the Pig. Is divided Torrichtung 1 shown via a connection pipe 25 and a feed line 2q, hoses three plastic in a preferred embodiment in for example "This is an advantageous PriktiOiisaufladung the occupancy material already on the \ teg arrangement according to Pig. 1 causes.

The G-eole wheel and / or housing is made for the same purpose Made of plastic or plastic-coated material with good electrostatic Charging properties,

In the drawings, 27 further denotes a compressed air connection to the fan drive and 28, 29 electrical sor / ie 30 urd connections. IHt 31 is connected to a compressed air source Bares organ referred to, which protrudes into the gate container with a portion provided with peripheral holes for the purpose of preventing EHumpen- and Honlraumbilduxig in the occupancy Well.

The leveling device 23 is provided with holes 32 and a recess 33 for varying the amount of material passing through, which can be adjusted by means of an outer lever 34, which works with a scale (not shown) for priority locking from different angular positions :! the Yo-rricht-axig 23, the outer rope of which has a heglage 3o for sucking in:., from vazriieroareu. Air quantity si * for the air-Bs »Ie-αη ^ ώgut-LiLummung can have. In the gun barrel or the cylinder or the Turbulöüseinsatz may be used uxigsvorsatz heraasragend a replaceable StrsLi.

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Claims (1)

Claims f1J Device for electrostatic charging and application of powdery and granular material, in particular powdery paint and other Selagmaterial, with a preferably pistol-like guide and support element with a handle (§) and a connection for a feed line from a compressed air source and a storage container for the Occupancy material, with opening and closing elements for the feed line as well as with a 2-ear and shaking device arranged on the handle for electrostatic charging of the occupancy material, characterized in that said charging means are formed from organs that direct and intensify the compressed air flow mixed with the occupancy material in such a way that the document is electrostatically charged by friction. 2, device according to claim 1, dadurcn ^ ekennzeiciinet that called charging means consisting of one or more iu gun barrel (10) arranged turbulence organs are formed, which for an electrostatic charging of the occupancy with the same, the compressed air and the gun driver provided sii-d. 3 "Device according to claim 1 or 2, characterized in that that the Pistolenrour and / or the Turbulenzorga ^ from one an electrostatic charge promoting material, preferably PVG plastic are formed, uiü that length and / or Inner diameter and / or wall thickness of the pistol, _pipe for the Charging properties .uit are chosen. 4. Device according to one of claims 1 to 3 * characterized zeicnnet that the rear end of the gun tube is closed by an end piece (9) and that the transition from the opening-closing device to the effective Pistolenronrabschnitt by a connection arranged in the handle igskanal (13) is formed, into which one end of a 'förikelro-ires (2) is inserted, which opens out coaxially in the pistol ring with the opening directed forward, ai there preferably surrounded by a ring packing (14) _o BATH ORIGINAL 2098 A 1/0670 5o device according to one of claims 1-4, characterized in that that the turbulence organ (1) consists of a mainly cylindrical body ax coaxial placement in the gun barrel is formed in front of the feed channel mouth in this " 5. Apparatus according to claim 5, characterized in that the turbulence element is pressed into the gun tube and that the passage for the compressed air-occupancy-flow from liuten, channels or the like. (15), preferably sunk into the turbulence organ periphery, is formed with semicircular cross-section, with a spiral arrangement to the turbulence organ _o 7. Apparatus according to claim 6, characterized in that the r.uten, channels or the like. (15) in relation to the turbulence organ center axis and i-i seal of the gun barrel mouth diverge. 8. Device according to one of claims 5-7, characterized in that at least egg /. CMrbulence organeride to the central axis hii; is guaranteed. 9. Device according to eii.eu the Änsr? avenge 1-5, a?. (v.:vol. ^ ekerx zelcl ■■ ;. Ot, -lass the Turbulerisorgan £ 8.iis or partly; ei3e sv.e a coaxial cylinder, preferably as a thin-walled plastic tube with the end closed against the compressed air tube. 10c device according to one of claims 1-9 »characterized in that that the front end of the gun barrel and / or the turbulence insert diverges or converges forward to control the spread. 11. Vorricntung according to any of claims 1-10, characterized in that the pistol tube and / or the Turbulenzeinsat ζ with exposed against the current ELächenprofilierungen, '"vie ribs, is provided and consists of such that the Toirsionsbewegung of the current in all or partially effect and / or bring about an increase in friction, 12. Device according to one of claims 1-11, characterized in that β that the Turbuienzorgsue wholly or partially 2098 41/0670 spiral-shaped connecting the insert with the gun barrel Ribs or the like. are formed. 13o device according to one of claims 1-12, characterized in that that the air flow is intended for peripheral introduction, 14o device according to one of claims 1-13 »marked thereby draws that the turbulence organ is rotatably mounted and that the torsion of the flow is provided at least partially by rotation of the turbulence organea for the purpose of generating it. 15o device according to one of claims 1-14, characterized in that that the gun barrel is provided for electrostatic charging by preferably external friction, and that It this charge intended for transfer to the occupancy is. 16. Device according to one of claims 1-15, characterized in that that the feed line (26) has several channels, preferably formed from plastic hoses. 17. Device according to one of claims 1-16, characterized in that that the storage container (21) has a collecting funnel (22) has, on the bottom of which an externally adjustable device (23) for regulating the one below this located, preferably compressed air-driven blower or the like. (24) is connected to the occupancy mileage, the Outer part of the regulating device (23) with a regulator (36) for sucking in variable amounts of air for the air-occupancy mixture is provided. 18. Device according to one of claims 1-17, characterized in that The G-blower wheel and / or housing made of plastic or plastic-coated material. 19. Device according to one of claims 1-18, characterized in that that in the collecting funnel (22) provided with holes and a device connected to a compressed air source for Prevents the formation of lumps and cavities in the material supply protrudes. 209841/0670 Blank page