DE1752257A1 - Spray gun for powder spraying - Google Patents

Description

"Spray gun to yulvereprühen" Those mnmeldung relates to a spray gun for Pulversprüheng as they can for example be used for spraying of plastic powder on Vrerkstücke, after which the workpieces run through an oven and the powder is caused to melt and bleed.

The spray gun after the Clanname.login has to be able to spray the up display provided in hollow body powder of greater length.

The task here is that the slope of the gun barrel can be adjusted as desired according to the slope of the hollow body .

A further object according to the application it is.) Thereby directing the applied high voltage for the electrostatic field as safe and low capacitance relative to the environment to the front electrode of the gun heads.

Furthermore , the problem is that at the Utoß- "places of the assembled gun barrel parts agglomerations of powder in the gun barrel are avoided . The application solves the problem that the gun tube between .Bandstück and front cable consists of several assemblable parts and that the high-voltage supply consists of a weak conductive wire, which is arranged in the area of the inner bore , in such a way that when the parts are assembled, a conductive connection can be established from the high-voltage connection in the handpiece to the electrodes at the front end.

In a further development of the object of the multiplication, the wire can be made so weak that it is barely able to grip .

It is also advisable to work or work the wire into the inner surface. Lies can be done by either the wire is pressed into the surface, wherein can also find application vest, for example, that the wire by Utroadurchgang erw & RST and is pressed thereby, or the wire may be also be worked. This can be done by gluing the wire on or by using a weak tape instead of wire , which is also glued on , for example, by epoxy resin.

One can also proceed in such a way that a conductive Xuaststoftachicht is applied in the form of a narrow bath or a line . In this case, conductive, curable plastic lacquer can also be used, which is applied as a line in the interior of the assemblable parts.

Such a training is relatively low in capacity and at the same time also so reliable in terms of transmission; that the high voltage is supplied once lossless the electrodes and on the other hand, a corresponding touch protection is provided.

One possible alternative procedure that the parts are rela- tively long with eingreifendeitVerbindungamuften assembled such that the sleeve wire or a conductive order is provided in the inner bore of which is switched on or applied, which is basically the re-entrant bore can be electrically coupled to the wire of the adjacent part.

This has the great advantage that there is a relatively long creepage distance from the bottom of the long engaging connecting sleeve to the surface of the ristoleno'laufen.

This prevents, above all, that arise at this juncture lumps of powder.

You can go riding in such a way that the dimensioning of the creepage distance from the point of contact between the adjacent part and the socket is so long that particle clusters at the coupling point are avoided. This length will depend on which insulation material is used as a gun body and like that re-entrant bore is formed. You can also proceed in such a way that the flange of the Hooker opens up several grooves that obstruct the creepage distance longer. In a particular further embodiment, can the spray gun in particular also be designed in such a way that the gun barrel between the handpiece and the front fade consists of several parts that can be put together, in such a way that that in this an additional continuous isolating the plastic hose can be used and between this and the Inn @ akand a weak conductive wire a bsw. is incorporated, with the proviso that the Arrangement of the wire of the construction as described in the gate This means that the wire is just barely is grip or that it is in the inner surface incorporated and processed. The pistol can also be designed so that the wire can be loosely inserted through the hose is. Furthermore, the conductive connection can be on or be worked into the surface of the Sahauohes., sauce as a leading trace, for example from a leading art fabric or metal. Here, too, there is an order of conductive paint, the corresponding with adhesive., abrasion-resistant plastic fabric is provided. In further training the subject harn as Sohlauah also the feed hose running off the conveyor serve in such a way that this depending on the number of susemsen- setsbareu parts are traceable. A further forward bind * allotment Ub ng for acceleration air is then out of half of the pistol grip in a special T-bag the feeder, also attached. You can proceed so that the hose at the end of the front parts funnel-shaped around'- bsw. can be turned out: such that a screwed-on Absahlußkappe the hose and at the same time the wire of the BoahspannungssutUhrung connects to the electrodes. This had the great advantage that the hose is sufficiently fixed at the front end and sugleioh also the high voltage » sufihruag safely attached sohlosses will. Mm can do this over-the-top absole cap also train so that never largely with: a protective collar over the adjoining part of the barrel overwhelmingly. In the wall of the front part, impact kßrpes «iaateaken, so that these can be easily removed and 6eta »oct can be. The holes for the prafrper. are directly in Rl.c "ä # - the direction of the notification line of the gun sound. To do this, mooh security means such as p.8. Rest or attach the hay. There is also the possibility of insertable ones Impact body itself to be designed as form, with about conductive electron parts on one . Impact body from äunstatott anßebraaht are or else the fall bodies are made out of emergency and serve as electrodes. Um can go so well », that the Prallhörger one or »bre» thin wire elec- to trod trust. The subject of the registration is in several # pictures dunem sohematisoh depicted. It seig «a Figure 1 shows a spray gun in a schematic representation partially switched to ami, Figure 2 a front part undressed with a through- Sighted plastic tube. In Ligur 1 there is an iron spray gun in a schematic Representation shown, which is partially exposed. The ßpr '. =. Lipistole consists in this Ausührungsbeispihl on the wheel piece 1 the part 5 of the groove 6 and is Front part 11, chew can of course obuvso, -well too insert several Zwisohexutüoke, which the ebentrlls be connected with buttes. In the handpiece 1 you can see how the powder air is mixed in via a hose 2.

This hose goes in a bore through the handpiece 1 and the powder-air mixture reaches the part 5, which is built into the piece of tape 1 via a thread 4 . A guide part 29, which rests on a coupling ring 15 , also connects to the thread . The coupling ring 15 is conductive. #in the coupling ring 15, the high-voltage line 3 is guided, which, after screwing in the part 5 , comes into contact with the weak wire 14 tensioned in the inner moor. iLuf; this way , the high voltage is fed to the coupling ring 16 , which is housed in the bore of the divider 5. Furthermore, the voltage is transmitted via the coupling ring 16 to the wire 13 tensioned in the inner bore of the sleeve 6 , which wire transmits the high voltage to the coupling ring 17 on the opposite side. lieiterhin reaches the high voltage on the in the inner bore of the front part 11 tensioned wire 12. The high voltage then reaches the front end of the electrical to 18th

It can be seen that the connecting sleeve 6 contains two threaded pieces 798, which are continued in guide lugs 9, 1U , which lie against the coupling rings 16, 17 . Llau recognizes that swisohoa the coupling ring 7, for example, and the hreßfhge 28 has a relatively long creepage distance , which prevents the coupling ring 1? or a potential builds up on the coupling ring 16 , which could lead to powder accumulations.

km bhde front of the baffle is attached body 20 on supports 19 on the front piece. 11

There is definitely the possibility that the cap 19 or else the impact body 2U can be designed as an electrode .

The part 5 is shown cut off at 21 in FIG .

In Figure 2, a further embodiment of the taameldegenticle is shown. La only the front body 22 is shown in section, which is at 2? is shown cut off .

It can be seen that in the front body 22 a plastic tube 23 is passed through without any joint and a protuberance 24 is made on the front unde, which can be clamped with a cover cap 25 , for example.

The plastic tube 23 is passed through all the other parts that are still inserted between the front body 22 and the handpiece 1 . You can also use the supply hose for the powder-air mixture.

The wire 26 is then passed through all the screwed-together parts to the handpiece. The wire 26 lies between the plastic claw 23 and the body of the front body 22 in the inner messenger.

Lr is connected to the electrode 18 at the front end. The registration brings the great advantage that an oprühpi "jtole for powder spraying is shown, which has the advantage of being optionally adjustable in length guidance is provided to the Hochspannung- ßlektrode. is more advantageous that the gun is also usable as a short gun, in the just the front part is screwed to the handpiece.

You can of course also provide Gpreizteile, which are used to guide the yistolenrohre.-; serve in a larger hole The nip spray gun 1'e.Bt in a modular design can be adapted to the bores of the pipes in any way, with the possibility of using a flexible front part which can be pulled through pipe bends. In this ball, a corresponding guide piece, which can be attached to the tubular body, for example, is applied.

Claims (1)

P atentansprüche 1. Gprühpistole to lulversprühen, dadurchgeke NNZ eichnet that the gun barrel between tape piece and the front: the end assembled from a plurality of files is and that the iiocüapa, nnung @ Führuni; from a weak, 1e1- Tendent wire , which is arranged in the area of the inner bore , such that when the parts are assembled, a conductive connection from the high-voltage connection in the handpiece to the electrodes on the front : ade can be established . 2. Pistol according to claim 1, dadurahgekenn s eia h.-n et that the wire is so weak that it is just grippy. 3. Pistol according to claim 1 and 2, characterized g ekenn -z eiohnet that the wire is incorporated or worked into the inner surface. 4. Pistol according to claim 1 to 3, dadurchgekenn -ss eichnet that the parts can be assembled with the aid of relatively long engaging connecting sleeves, such # that in the interior of the bore of the sleeve wire is or is applied , which is basically the re-entrant bore with the Wire the. angrensenden feiles can be electrically coupled . 5. Gun according to claim 4, d a. durchgeken nseioh -n et that the iücieohetrecke from the point of contact between the adjoining part and sleeve is dimensioned so long that yarti £ el agglomerations are avoided at the coupling point . 6. spray gun in particular according to claim 1, c h ä adur labeled in such eichnet that the 2istolenrohr between Jandstück and front _., Walls of a plurality of rows zusaBUnensetzbaren is such that in this an additional throughput continuous insulating üchlauch plastic is used and between this and the inner wall a weak conductive wire or is incorporated, with the proviso that the .Arrangement of the wire of the construction according to claim 1 to 5 corresponds ? eistole according to claim 6, dadurchge Flag with hn e t in that the wire-less continuous with the Ichlauch be inserted, 8, i-istole after i # jaeprueh 6 and?, z e i dadurchgekenn seframe that on or in the surface of the Sehlauches a leading trace z.8. conductive plastic Uetall or conductive paint is incorporated 9. Fisole according @unsprueh 6 and 7, dadurc hgekenn - ze i Ohnet, da2 as ieilaueh which serves from the conveyor device from running off supply tube such that said nachziehbar depending xnzahl the zusammenxetzbaren parts is. 10. The pistol of claim 6 to 9, characterized ge mark - seiehnet that the iahlauch at the end of the front parts environmentally funnel-shaped and is ausstülpbar such that an above screwed kbschlußkappe the tube sets and zußliieh the wire of the high voltage supply with electrode connecting * 11. the pistol of claim 6-109 dadurchgekenn -z e i a HNET, DAB are rrallkörper inserted into the candung of the front part. 12. Pistol according to Äaspruoh 11, dadurohgekenn seichae -t that the insertable limbs themselves are designed as , high-voltage electrodes or carry them,