DE1960805A1 - Blasting device - Google Patents

Description

PATINTANWXLTI German ING. KARL BOIHMIRT · DiPL-ING. ALBIRT BOIHMIRT 28 BREMEN FELDSTRASSE 24 TEL. (0421) 491760, 442551

File number: Nam · d. Note:

My sign:

Hay registration

Abrasive Developments

A 1114

IKOM Bankkmtet Ir · «» lank, Itmh, acct. 100144t

28 Bremen, November 28, 1969

ABBASiIVI DEVELOPMENTS LIMITED, Solihull, Warwickshire (UK)

Blasting device

The invention relates to a blasting device for cleaning retail surfaces with a blasting device BlaskaiüEjer; one at one end of this chamber connected primary air supply line; Means of a blasting abrasive, iiii hereinafter referred to as sand, to introduce into the primary air upstream of the connection point of this conduit to the chamber; in the Chamber wall provided, lockable by the workpiece openings on the circumference of which means restricting the entry of secondary air along the work piece arranged are j facilities for the creation of a Suction pressure to the chamber, in order to get the primary air and sand into the closed state of the openings To suck in Karr.ner and to remove used sand and air from the chamber; and one in the chamber entering sand against the workpiece surface judging institution.

According to the invention, in a blasting device of this type, the primary air supply line is on one outside the Blaekar.mer near this chamber Place with a preparation for the introduction of

28/04/08

009827/1249

BATH ORIGINAL

¹ ^ to ^ ^m

additional air or "third air" provided, which Kit combined with the sand-primary air flow flowing through this pipe

The devices for supplying the additional air consist of a number of holes at the ends of the sand located outside, outside the chamber Jet nozzles are arranged directing the workpiece · The total cross-section of these holes is in comparison low to the cross section of the primary air supply line.

By the fact that additional air or third air is close the blower allows entry into the supply line, can the speed of the sand-Sriinärluft-Stroae * in the part of this line located upstream of the inlet of the additional third air, while that of primary air, sand and third air existing mixture due to the introduction of the third air in the last part of the supply line desired speed can be accelerated. The reduced velocity existing upstream of the entry of the third air into this line which does not affect the impact speed of the sand on the workpiece, leads to a reduction in wear within the feed line «,

The blow chamber can have different shapes · So can e.g. when cleaning strip-shaped material Chamber can be tubular, the workpiece openings being slots in the chamber wall opposite one another, so that the strip protrudes across the chamber can move. The device that directs the sand onto the da · ftexk-ßtück is then a "living survival." the width of the strip extending nozzle arrangement, to the "sto & e outside of the chamber the supply line is connected and from the other end of which the air and the sand are directed towards there" Work piece exit. The facilities '' too? Creation des ^ printouts to the board can be sent to the same

008827/1249 «

^ß AD ORiG / w _ÄL

Side of the strip like the nozzle arrangement or on the opposite side of the strip, the first arrangement catfish, with the one very evenly worked surface can be obtained, is preferred

Beam devices of the type described here are particularly suitable for cleaning wire, other thread-like material and stave material Wire, which is usually bundled in long lengths is wound up, is sucked off the bundle, passed through the Blaekanmer and then wound up again · In In some cases the cleaning of wire can be done essentially continuously when the wire ends be welded together from sequentially treated coils * Under these circumstances it is not always possible to thread the end of the wire to be cleaned into the tubular chamber, especially then, when a thin wire or several such wires are to be cleaned · According to a further characteristic the invention therefore divides a tubular blowing chamber into two essentially 17-shaped parts, which are connected in a hinge-like manner, the openings | and the entry of secondary air through them Means restricting openings form guides through which a thread-like workpiece is passed through

If wire is to be cleaned, the ropes of the chamber can be opened, the wire inserted and the parts of the Kaan closed around the wire, which then by which the chamber can be pulled.

With an arrangement of the devices directing the sand at the workpiece, a number of jet nozzles can be arranged in groups on a longitudinal axis of the chamber

009827/1249 -

be spaced surrounding helix Yorsu * 's ^ * iae However, the nozzles are arranged so that their capacity utilization _t apertures Svei or more helical lines are "whose coincident axes parallel to Kammerlängsaehae Terlaufen. These helical lines are offset from one another in the axial direction of the chamber by a distance which is small in relation to the total length of the chamber, each nozzle being directed to the axis of its helical line and each helical line having at least one complete turn

Although the air nozzles can also be arranged in this way can that their outlet openings lie on a single helix "was found dooh" that at For the treatment of wire, nozzles set up in this way sometimes have a part of the wire surface is not applied. This is because "the wire is twisted when it is unwound from the bundle, with a collar with a diameter of about 90 cm a wire length of about 3 »5 a by about 90 ° twisted. But if the outlet openings of the nozzles are slightly offset axially to the chamber on two or more Helical lines are arranged »the beam pattern is denser and larger in area and the possibility of that part of the wire surface remains untreated is considerably less.

Another problem encountered with blasting devices with a tubular chamber used for cleaning wire is "that" if a Wire tears »the outlet ends of the jet nozzles protruding into the chamber can be damaged To pass through the previously opened chamber, twist the wire with the outer ends of the nozzles.

The jet nozzles are therefore preferably on one or

009827/1249

several inwardly protruding »screw-line shaped projections arranged in this way» that the outlet openings of the nozzles are not out of this Ledge or protruding from these gates

In see is a continuous working method of the Gate direction is desirable when treating wire and it has been found that in some cases it is possible to use thicker wires without first opening the Chamber to thread through the hinduoh.

At the inlet end of the chamber there is therefore preferably a funnel converging from the outside in the direction of the wire guide arranged at this end and in the Chamber near its outlet end, a second in the direction of the wire guide arranged at this end of the chamber converging funnel provided.

A wire to be passed through the chamber becomes

so first into one end of the chamber through the first funnel introduced and come »when its free

End approaches the other end of the chamber »at that

Another funnel to the plant »of the wire end with the loading guide aligns "

If one imagines a tubular blowing chamber used for kinking wire »another problem may arise. When the wire is peeled from coils in the usual way and the wires of successive coils are not welded together »is between the wire ends There is a gap between two consecutive bundles. A satisfactory treatment procedure requires that both ends of one Wire length to be cleaned. During the Durohgang the wire ends through the chamber are always one of the wire guides arranged at the ends of the chamber

009827/1249 '

BAD ΟΡ, ν

in the transition from one covenant to the other during a short one. Period of time without a wire. If those Guide, if no wire goes through it, is left open, air can enter the chamber through it, thereby impairing the jet effect and the end of the wire passing through the chamber at this point in time is only insufficiently cleaned.

For this reason, automatic devices, either or both, are preferably provided Close guide openings in the chamber if a workpiece does not pass through them.

These locking devices are preferably designed and arranged in such a way that they can be removed from the workpiece, d. H. operated by the wire itself. Swiveling flaps can be used as closing devices.

The flap arranged at the workpiece inlet end of the chamber and the flap arranged at the outlet end of the chamber can reduce the loss of vacuum during opening and closing of the chamber Flap lowering tubular extension of the chamber be arranged.

The chamber is usually clad and on to reduce wear and tear the points at which jet nozzles are directed at the chamber wall can be compared to these nozzles Deflectors made of natural or soft synthetic rubber are provided to protect the chamber wall •a.

009827/1249

BATH ORIGINAL

Usually a number of primary air supply lines lead to the blow chamber, noble every supply line is connected to a jet nozzle, and ee is a further feature of the invention, specially designed means for introducing the primary air to be provided in these lines.

According to this feature of the invention exist in one Blowing device of the type mentioned at the beginning, the means for introducing the tape into the primary air from a first ring, which is at the bottom of a sand container arranged and with a number of communicating with the container interior facing downwards LeMüsen is provided and one below this. Nozzle ring arranged second ring, which with a Number of open-topped, aligned with the fetal nozzles Sleeves and a corresponding number of pipe sockets is provided, each of which with one Sleeve is in communication and with one of the blaekammer leading primary air lines is connected.

With this arrangement an even distribution of the sand over a number of nozzles is achieved and each pipe socket can be assigned directly to it Jet nozzle can be connected to its own primary air line, making the device essential is simplified. The sand container can for supplying the sand to the Keßdüsenring with a be provided conical bottom, wherein a perforated plate can be arranged above the bottom.

A method for sandblasting a workpiece surface with the following steps is already known: with the one using the workpiece top

ff 009827/1249

BAD CRlGiNAL

surface formed as a wall a suction pressure is locked; through this pressure eia Biaetröfflen caused by primary air into the chamber, where * with the admission of secondary air along the circumference the geeaoten t? Erkstiiokoberfliehe is restricted; that the sand of the i-Tiiüärluft VOi hereta enters ia the chamber is clogged; and the sand introduced into the chamber is directed against the workpiece surface and the spent sand from the Chamber sucked air is discharged from the chamber.

According to a further feature of the invention, a Method of the aforementioned type, improved in that, after the sand has been introduced into the fresh air, but before the occurrence of the primary air-sand mixture taken into the chamber, third air, and the primary air and the sand is added, the amount the supplied third air preferably less than that of the primary air is «*

The advantage of this procedure, as already described above, is that blasting media and primary air can flow relatively slowly until it approaches the chamber and that the third air is then allowed to enter, as a result of which the air and jet medium mixture is accelerated.

The invention becomes part of the description below described in detail with reference to the drawings. In the drawings is:

Fig. 1 is an elevation of the main part of an invention: js ge outside blowing device;

0098 27/1249

BATH

Fig. 2 is partly in general

l Blaekaaacs * dar Is Flg. 1 certificate

FIg * 5 a page * ims! the end; of the Blafifcaufp shown 1 & Fig. 2. «r» is one for sale in dashed sharks also in his open position is inclined;

Fig, 1- a QuereeEüitt gea $ 3 of the line 4-4 of the Sl 2

Fig. 5 shows a brewery amf dl * ä & n sand on the individual »» SüIStoingsleitungen ve tild äi * o> vdiiung d «r in Fig. 1

6 shows a view of the lines sur kin guide by sand in dia Priaärlufti and

Fig. 7 is a ßcheaetieche sectional view through a second outflow form special sub sloping the surface τοπ strip-like material used blk

The penalty device shown in Figs. 1 and 4 did following animal main wave: those in Fig. 2 as Whole »it 10 designated Blaafcaamtr; those in Fig. 1 means sun depositing referred to as goose old 11 of reusable sand »die in? ig« 1 as Gansas old 12 beseitshneten RLttal sur separation, ▼ on dust and those in this figure & Ls Cfcsnsaa with 13 be f. · lehn · te AbsaiigeTorriehtusg »

in the Flg », 3 _f 3 and 4 Gesdlg;! ^ Blaslcaaaer K) tubular hair dryer auigeMlüec and u & faSt svel ia ve«

T-> f8ralge f »ilt 14 nod V} * Bio K & aaar iah auf Plaea Hahnen IS, an dasasß mis VlsfrrVanfcrobr b« eiiah «> adea äudgIlagern 17 bew * 18 plates 19 bsw. £? O st: r ^ bafestdgfe are »Svisciien these -Platioii ist; the "caia part i5 ia of the ia genden taäühr ^ Ibaneu \ tel & 9 atari? attached.

009827/1249 · ■

BATH ORIGINAL

- ίο -

Each of the flats 19 ub & 20 is provided with a "bearing housing 21 in which pins 22 are rotatably mounted in bearings 25". The pins 22 are attached to the arsenic 3 & which are attached to the. Zwilch · ® the fell. Ends 2Ί- and 2? extended oak tvet drtft & a? · pens 2? _s that are marked with ougenformigim komehl% s & s1Melkm & 2Q (Fig « 5) ? dia ait Ata S & lfesitetttig »ii 29 ^ on hydraulic ^ ylindeira 30 we ^ fe ^ sAeB» iad «When actuating the cylinder 30 Hwfisa the era® 24 and dcir mi them Terhundene Samerteii 1 ^ - & u # u ^ r in Fig. 5 i & position shown in full drawn lines into the position shown in dashed lines "position 24".

The blower case has an inlet housing 31 and an outlet housing 32 on its end, the inlet housing 31 has an attachment 33 kit lne? Funnel-shaped lining 34 made of wear-resistant material, which is held in position by pins 35. The lining goes over into a guide 36 made of hard material for the wire drawn through the Blaalcammer. The opening 37 of the guide is normally closed by a flap 38 which moves into the closed position by its own weight and which is rotatably mounted at 39 Housing 311 the lining 54 wa.a the guide 36 are all divided into two sections «which in the closed state of the leaser in the tlar focal plane of the BLaasier-14 ixiii 1 ^ (Fig« V) lying on top of one another Di · «inen vi.ν AiiakleyUiBg yv imd of the guide 36 are & sVi »l mn attached to the» in @ a fell ü & m Gehiuses 31 and the Absehfiitta from m uiiii iy »hÄr.s« t * il ·

009827/1249

BATH

The outlet housing 52 has a lining 40 made of hard material which is held in place by pins 41. The liner is tapered and goes in a guide 42 made of hard material, for example a ceramic material fiber. The opening 45 of this guide is normally closed by a flap 44 which is rotatably mounted at 4.5 and which is located below pivoted downwards under the influence of their own weight. The housing 52 has a tubular ang set 46, which is provided with a further guide 47 at its outer end. The housing 32, the Liner 40, guides 42 and 46, and boss 46 are all divided into two sections, the When the chamber is closed, lay the chamber parts 15 and 15 against one another in the parting plane (Fig. 5). A portion of the liner 40, the guide ^ The stanchions 42 and 47 and the ana · ti * β 46 is therefore each fastened to the one skin of the housing 52 and the other skin to the other housing part.

By means of screws 48 are the chamber part 14, the Arms 2 *; and one part of the housings 31 and 32 on the one hand and the chamber part 15, the plates 19, 20 and the other greats of the housing 31 and 32 on the other hand connected to one another. On every screw 48 sits a! Chuck 48a, which the chamber part 14 on the arm 24 BSW. the chamber part 15 ad the plates 19 * 20 holds, and also a flutter 48b which holds the housings 51 and 52, respectively, in their positions. Ee is therefore possible to replace the housing, for example to be able to use the chamber for treating wire or rod material without the need for it is, the connection between the part 14 and the arms 24 on the one hand or between the part 15 and the

009827/1249

BATH ORIGINAL

Flatten 19, 20 on the other hand to solve. Suitable semicircular seals 49 are between the Eamer part 14 and the arms 24, between the part 15 and the plates 19 »20 and» wipe the Arms 24 and the housings 31 »32 -provided.

Ee can be seen that due to the subdivision the chamber 10 and the housing 31, 32 with their associated parts when the Arartt 24 * is pivoted by the hydraulic cylinder 30 in the position 24a, the chamber is opened and its part 14 together with the parts of the housing 31 «32 belonging to it is moved into the position 14a shown in FIG. 3. There can then be one or more to be treated Wires are passed through the chamber, whereupon the chamber is closed.

The blow chamber is seen with a number of jet nozzles, which are positioned around the longitudinal axis of the Kamner extending helices are arranged axially to the chamber in a compared to the length the chamber are arranged a small distance from one another. ..

In FIG. 2 it is shown that each jet nozzle 50 lies opposite the intermediate space present between two opposite blowing nozzles y \ , and that each nozzle 5f lies opposite the corresponding intermediate space between two nozzles 30. The nozzles are arranged so that their outlet openings are directed towards the longitudinal axis of the chamber, extending through a helical outer rib 52 of the chamber parts 14 and 15 therethrough.

009827/1249

'BAD ORIGINAL

From Fig. 4 can be seen && £ of the outer rib 52 corresponds to an inner helical lip 53, ia ae? the nozzles are arranged in such a way that their outlet end with the inner surface of this inner one Cursing clan. The purpose of this arrangement is explained below.

Like Flg. 4, the mutually similar air nozzles have an existing from 3tabl Kohr 5 ^J i, the internally with a converging passage 56 having clothing from? 55 of synthetic rubber λ

mi is provided · In an Auabohnmg 5? the lining 55 the upper end of a nozzle tube 58 is inserted, which consist of any suitable material, for example a ceramic material can · The nozzle tube is encompassed by a holder 59 inserted into the rib 53. These Bracket, which is provided with an external thread at 60, consists of two halves »one on the bracket screwed fliutter 61 attaches the nozzle pipe to the Bracket 59 firmly.

The tube 54 is provided with a number of holes 62 which allow the entry of third air into the semicircle flowing to the nozzle. The outer clothing 55 is provided with recesses 63 with which the holes 62 are aligned. The recesses 63 are separated from one another by hips 64. The end of a supply line in the form of a hose 65 is received by the pipe 54 and leads a Saad-Luft-Qcrilach to the nozzle. The overall cross-section of the holes 62 is preferably small in relation to the hose 65, as shown.

000827/1249

BATH

Since the jet nozzles 50 and 51 are similar to each other, the description of the nozzle 50 is sufficient. From flg. 4 is however, see that the free end 66 of the nozzle tube 58 matches the inner surface 65 of the lip 53 runs essentially flush or lies somewhat inward of this surface »so that the © bushing tubes do not overlap the inner rib surface protrudes and therefore against Damage caused by one with the hip 53 in contact incoming workpiece are protected.

The chamber part 15 is * with a large projection 63 provided, on the flange 69 of which the suction pipe 70 connected 1st

Vie will be described in more detail, the auetretende from the nozzle tubes 58 IiUft sand Gemiseh urges the "wipe ά9 & guides 36 and * 2 by the Blaskaou & er be moved workpiece and this air, the sand and the resulting on the workpiece at the bite process abrasion withdrawn through the suction line 70 and the deposit? 11 for the rechargeable “reversible Saud” u & e drives.

The separator 11 has a cyclone 75, with dt * the suction line 70 is connected at 76. The cyclone 75 separates the wiedanrerwendbare Strahimlttel bstr · the sand or about used-abrasive Haterlftl different nature from the over £ «r him out line 70 !!! lAift Sand GeMiech mb, 6 iflederverwendbsre sand falls sum floor at the _cyclone"} while dl · Air and the aoöh Dust contained in it via sin Bohr 77 1ώ iiinnii rarely reach ZjZlon 73, which is the skin of the dust separator. Bar of dust fillIt into a dust box 79, from which it can be removed from the clone

0 09827/12 49

ORIGIMAL BATHROOM

Air leaving 78 is guided via a pipe 80 to the bottom of a filter 81, in which any remaining fine dust is filtered out and enters the dust compartment 82 supplied 84th It can be seen that the blower 84 applies via the cyclones 75 and 78 and filter 81 to a suction pressure conduit 70 and thereby PRI ä marluft and sucks the sand in the chamber 10 '

The reusable sand which sinks to the bottom of the cyclone 75 is diverted by a baffle 86 and in an upper container 87, the sand can be poured into an upper container 87 in a middle Container 88 arrive when the pressure is the same in both containers. The pressure in the container is changed by means of a first valve 89. Between the upper container 87 and the middle one Container 88 is a second valve 90 with an inlet Hard rubber or similar material existing flap 91 arranged. This flap can pivot about its upper edge on the basis of a resulting force exerted by it, which is due to the difference in the containers 87 and 88 Press and the pressure exerted on the flap in the opening direction by the sand in the container 87 results. The middle container 88 is airtight at its upper end 92 from the upper container 87 sealed.

An open top, substantially cylindrical lower container 93, which has a conical at its bottom Has baffle 94 is below the middle

009827/1249

BATH ORIGINAL

Container 88 is provided. A »wipe the containers 88 and 93 provided third valve 95 has a similarly to the flap 91 freely rotatable arranged flap 96, the movement of which is dependent on the differential pressure between the containers 88 and 93 and the weight of the Ib Container 88 located sands is affected.

The first valve 89 operates in such a way that the middle container 88 is alternately under the pressure prevailing in the upper container 87, ie the atmospheric pressure. The first valve can correspond to the valve described in the German application P 14 77 958.9 or the valve described in an application filed on the same page. If the middle container 88 is under the pressure of the upper container 8? stands, the atmospheric pressure closes the third valve 95 "while the" wide valve 90 opens, so that sand can get from the upper container 87 into the middle container 88. Venn the middle container 88 under atmospheric pressure bsv. When the pressure of the lower container 95 is up, the wide valve 90 is kept closed by the atmospheric pressure on its flap 9Λ , while the third valve 95 opens so that sand and clay can get into the lower container 88 from the middle container *

Sand reaching the lower container 93 is fed through the guide plate 9 * (flg. 6) to the lower peripheral part of this container and there in inlet lines like the one shown in FIG. 4 described Hoses 65 sucked in.

009827/12 ^ 9

Aue the figures 5 tud 6 kazm enthosusec werfieii, that the bottom of the unfcoren container consists of, a slag 97, alt which the lower £ ant @ des! «Sitblecha 9 ¹ I- and dl © lower edge do: 'outer wall 9- duxcfi 8chweiBea is »Ia ring 97 ie δ a * a« aiil * m & 99, in which Hess & tfsö / j 100 # lags are very auto to, through which the sand in vorbestimsi & e? Meng © steps,

Below the ring: «: vf« δ a t; -altern Hing 101 güsahen, Abv ? Ine number '^ ön cylindricalLsülieii has openings 102, which with the bores 99 flee axially * Aa the upper surface of the fiinga 101 are axiai to the openings 102 sleeves 103 welded on, in which the nozzles 100 auatwfeonds sand falls · ice ussiseffon ends of the openings 10 "S ßissd lurch stoppers 1O ^ rsr ·" closed · the Μίιψ, 101 iiafe also an Aaaalil ψοά radial threaded hole a 105, which cut the openings * Drilling nipples are screwed into tile bores 105, to which one of the upper and lower parts of the Ochläucha 65 are clamped, the anddx * e Μβκ In the vei @ # described in Fig. 4 are connected to the breasts 50 and 5'1, Eu is «raiisMlieh» that, every Blise 50 and 51 runs uci Sand üö ^ r a gate assigned 65 * uguuiert vixd »

on the Kaaaer 10 i? atag € i? ttck, PM occurs «

in the end of everything? Sleeve 103 in and over diö Büetn 100 Bmiä out of the unt®r§ia. BdbfSl 95 harsius »BIe Hieohyng awa? Rl« äi »lwft; and Saad gt dana about di # SöiiHuche 65 «u d <sn fK> and f» 1, the Öfoar area beats the sales people excited about and is dated to the descriptive information about the suction line

9827/1249

BATH ORIGINAL

1360805

discharged

The mode of operation of the 4-way pocket-level forrlc & tung is as follows: Umyh the S & uggebläiie 84 τοη the Elektro · notor 85 driven tool $, vtxA, via the cyclone 75 * 78, the filter §1 »a4 the Sfeteleifcungen 77, 80 ₁ 83 elm. Saugdruek an ctt S & ugüeltiisg 7C eagel «.g $ · Through this Saugdruel ΪμΪt trird from d§? F KasHer. 10 sucked off, ¥ @ £ m the bridge in the "Kmieeif afefSLlIt ₃ wii ^ S:" aagBlSufig PrlsÄrliift in the HÜIsjm 135 entry ,. and nblang the hoses 65 d # a lltralil ^ lakes 50 itiad f> 1 mis'cremen. From the elntretenitm into the pods 105 primary Iu * t we ^. from desi BeMlter 93 ffle ^ r the Hesndüsen 100 exiting sand carried away ₉ old des · Jiriaärluf b veralscili »; and are fed via the Sobliuühe 85 AEE @ Straoldüaen 50 "51 · Baa Sftnd-Lart- vamisch occurs because in Μ, θ converging Burehl & ese 56 of the liners 55 of these nozzles a · If the Sealsen at the holes 63 vorhaistr $ st _f Wit &. Brif ^ lmft sucked in and degenerated old & w PvLuMvlnit and the sand · Bas Qealsok from explanatory air, sand and third air then flows along the IHIsenrohre 58 and hits the workpiece, which is moved through the Kaamer in a nooh in Baschreibendon manner air through the LScher 62 accelerates the frlMarluft ° »3andgeiiiiii £ h _t s & dall for a 'given

indiability of this mixture on a, di® GeesliifiMigli, il l # r Pifieärluffc and des i »Sehlatich §5« »f & nmd des Elnsutretens τοη

rlg «ä? can be as this 0h »· Hlniutr« - ψ @ η VzI I chi ft would be the case »

Di * in fig » Z geseigts Blsjkajadr 10 1st primarily for the treatment of won wire or stabaatiri»!

009827/1249

BAD ORIG! NAl

(both referred to as wire in the following)., the wire in this figure on the left Enters the hammer on the side and exits the chamber on the right-hand side. If the wire is rigid, it can initially, without opening the chamber, can be pushed through ilese, with the lining 34- due to its funnel-shaped design, the wire in introduces the opening 37 of the guide 36, which enters the chamber 10 after the flap 38 has been opened. Of the Wire is then waiter advanced through the chamber until its end passes through the liner 40, the other flap opens and the guide 47 passes. If the wire is thin and insufficiently rigid to pass through the chamber, the chamber will be thinned the cylinder 30 is opened and closed again after the wire has been inserted. It is also possible to have several to move thin wires through the chamber at the same time.

The one between the inlet and outlet housings 31 and 32 located length can then, since the jet nozzles 30 and 51 are directed to the longitudinal axis of the chamber, exposed to the impact of the sand. The fact that the nozzles 50 and 51 are arranged on two helical lines that are axially to the chamber by one are staggered a short distance from each other, a very even blow pattern is formed and the wire treated equally.

When the flaps 38 and 44 are open, the wire guided into the guides 36 and 4-3, whereby the entry of clay secondary air into the chamber is world-wide prevented. Venn wire now present in bundles is treated, then when the front end of the wire of a new collar is inserted into the chamber, the

00Θ827 / 1249

BATH ORIGINAL

Flap 38 can be opened while flap 44 remains closed. This preliminary Geechloeeen remaining the flap 44 contributes to the Maintain negative pressure in the chamber 10. The wire holds the flap 38 open, but the zu- ^ occurs from secondary air is from the between the Wire and the opening 37 of the guide determined. Then the front rotating end becomes the flap 44 to open. When the rear end of the wire enters the chamber, the flap 38 will automatically open close and during the treatment of this wire end the negative pressure is maintained in the chamber until this end leaves the chamber and is the flap 44 closes behind him. The presence of the tubular extension 46 helps to keep changes in the negative pressure low when that the rear end of the wire leaves the chamber and the flap 44 closes.

The negative pressure prevailing in the chamber tries to keep the flap 44 in its closed position, while the flap 38 is designed so that it remains closed against the atmospheric pressure on its outside, be it through it Dead weight, or if necessary, by attaching an additional weight, not shown.

If the wire should leave its Veg leading through the center of the chamber, it cannot damage the nozzle pipes 38, since these are arranged in a recess in the rib 53. It has been found that relatively thick wire means calibration the funnel-shaped linings 34 and 40 through the openings 37 and 43 of the guides 36 and 42

009827/1249

BATH ORIGINAL

can be carried out, moreover, the thicker wire is sufficiently rigid to hold the flaps 38 and 44 when passing through run through the chamber to open.

Sand, air and abrasion leave the chamber 10 via the suction line 70 and flow over the cyclone 75 t in which the reusable sand is separated. The reusable sand passes through that from the first valve 89 in Figure 4 described below Wise controlled container 87 »88 and 93 and is fed back to the jet nozzles 50 and 51 via the hose 65. No longer usable sand and abrasion are in the second cyclone 78 and the filter 81 excreted so that the air led into the open la can be essentially dust-free.

The first valve 89 cyclically applies either the lower container 93 to the middle container 88 prevailing pressure, in the present case atmospheric pressure, or the pressure prevailing in the upper container, whereby the second and the alternately open and close third valves 90 and 95 so that sand can pass from the upper and lower container without disturbing the low pressure prevailing in the system.

The blow camera 10 shown in FIGS. 2 and 4 is suitable very much like kinking wire, while those in Flg. 7 shown blown scenes sum legs of strip-shaped material is determined.

009827/1249

BATH ORIGINAL

The one in Pig. The chamber shown in FIG. 7 has a substantially cylindrical bitter part 150 with protruding, wing-like sections 151 and 152. The strip-shaped material 153 passes through guides 154 into the protruding sections 153 and 153 152 a. Has a nozzle arrangement designated as 155 a number of jet nozzles similar to the nozzles described in connection with bit FIG. Of the middle part 150 has an approach 156 to the a suction line 70 is connected »The mode of operation of the blow camera results from the preceding gets air and sand through the nozzles of the arrangement 155 directed against surface 157 of the bleaching strip. The jet nozzles are shown in FIG manner shown supplied third air. It should be noted that sand impinges on surface 157 and the suction pressure on one opposite it Surface is peeled off. The guides 154 allow secondary air to enter the chamber. Since the guides are spaced from the cylindrical part 150, the penetration of secondary air has no effect on the jet pattern * see above that a very even blowing process is achieved

If an even blowing pattern isn't that important, the protruding sections 151 and 152 can be removed * and suction can then be done from the side of the bleaching strip that passes through the Sand-exposed side is opposite. The in Fig. 7 is preferred, however «

0 0 98 27/1249

ORIGINAL BATHROOM,

Claims (1)

speech 1. Blasting device for cleaning .Verkstückoberflächen with a blasting or Blaekammer; one at one end of this chamber connected primary air «» supply line; Means of blasting media »im the following sand called "upstream of the connection point a of this line to the chamber in the primary air introduce; "Openings that can be closed by the workpiece" are provided in the chamber wall on the circumference of the Admission of secondary air is arranged along the workpiece restricting means; Facilities but Application of suction pressure to the chamber in order to keep the air open and open to the air in the closed state Chamber suck in and around'used sand and air out to be discharged from the Chamber; and one directs the sand entering the chamber against the workpiece surface Device »characterized» in that the primary air supply line is connected to an outside of the blazing chamber near this chamber is provided with a device for introducing additional air, which unites with the sand-primary air flow flowing through this pipe 2 «Device according to claim 1» characterized » that the blasting agent is aimed at the workpiece Equipment consisting of one or more jet nozzles (50 »51) exist, the one end of which is located in the chamber (15) and directed towards the tAferkstück and the other end connected to the supply line (65) to the devices 009827/1249 BAD GF ₁ SGiNAL -y- ZH (62) is provided for supplying additional air. 3. Apparatus according to claim 2, characterized in that the means for supplying additional air consist of a number of holes (63) arranged in the said other end of each nozzle (51 »52), the seed cross-section of which in relation to the cross-section of the supply line ( 65) is low. 4 ·. Device according to claim 2 or 3 »characterized in that that each of the jet nozzles (50, 51) has a section serving to supply the additional air (62,63,64-) and a section (55 * 56) which directs the abrasive and the blown air onto the workpiece has a smaller cross-section. 5. Device according to one of the preceding claims for cleaning strip-like material, characterized in that the blower tubes are tubular and the feeder feed openings extend into the chamber wall opposite slots (154), which are arranged so that the "erfeiiUüek« » strip (157) across the chamber. whose length © moves, and that the blasting media against the piece (157) directing means consisting of a device arranged in the chamber wall and extending across the width of the strip. kenden nozzle arrangement (155) consists of such a design that on herea outside of the chamber to ;; eführfcen i »ndu via the supply line -zug -e led air and jet« means of your other 'iäide against the workpiece ge « is directed, with the entry of additional L-ittel (62, 63) allowing air between the Ead «E the nozzle arrangement, 6. Apparatus according to claim 5 »aadui'ci ^ gekenazeieh · = · net that the device (156; 70) for applying a suction pressure to the chamber on the same side of the workpiece strip (157) as the _; Msenia arrangement (155) connected to ". · _:. . . 009827/1 249 BATH ORIGINAL 2Γ 7. Device according to claim 5 or 6, characterized in that the chamber is made up of a central channel part (150) from diametrically opposite sides radially protruding first and second outer sections (151, 152), with the * 7erkstüok0treifen during operation Widen (157) through the first of these sections (151), then through the middle part (150) these sections (152) is moved, and that the outer Sections (151,152) the ßlηtritt of secondary air In openings (154) restricting the chamber are provided « 8 · Device according to claim 5 »daduroh characterized, that the device (156, 70) for applying a suction » pressure on the Kaiamer on the side of the strip (157) is arranged, which is opposite the atrium side » on which the nozzle arrangement (155) is provided 9 «Device according to one of claims 1-4» characterized in that the Blaekaneer (10) are tubular formed and two la essential U-shaped parts (14 * 15) has hinge-shaped (at 22) with each other are connected; that the inlet and outlet openings for the workpiece at opposite ends of the chamber arranged and old guides (37,47) for the workpiece J are provided 10. The device according to claim 9 »daduroh characterized, that the hand against dt «./rkstttokebarflache rich» tend · establishment au · is weatntllohan «ohraubenlinl ·» » shaped around the Längaaonaar Kamaar aogtordnatan groups of jet nozzles (', 50,51). 11 device according to claim 9, that fjakejinsel suspects, that dl "directing the Saad against the VerkstUokobarfläoha" Set up aas a? Looked! of ^ jet nozzles (50.51) exists, the outlet openings of which are two or more .ichraubllnie »with coincident, parallel aar 009827/1 2 A 9 " -S- Axes running along the longitudinal axis of the chamber are »where the helical lines are axially offset from the chamber by a small distance compared to the total length of the chamber are arranged and each helix at least one has a full turn 12 · Device according to claim 11, characterized in that the outlet openings of the jet nozzles (50 or 51) arranged on a helical line wipe the « adjacent outlet openings from one or the other Nozzles (51 or 50) arranged in helical lines lie opposite existing spaces. 13 · Device according to one ά9Τ speech 9-12, characterized in that the jet nozzles (50,51) on one or more protruding inwardly from the chamber wall! The helical projections (53) are arranged in such a way that the dimension openings of the DUa do not protrude from this projection or these projections. H * device according to claim 13t dadirch marked, that a single screw-shaped projection (53) provided for the outlet openings of the SUsen (50,51) 1st 15 · Device according to one of claims 9-14 »characterized by an outlet on the front part of the chamber arranged from the outside in the direction of the body opening (37) arranged at this end of the chamber converging funnel-shaped guide (34) and an inside Chamber near its protruding expanse of funnel-shaped guide (40, 43) which converges in the direction of the ./erkatüekauslaSöffaung (4?) 16 "Device according to one of claims 9-15" identified by devices (38, 44) sum automat! Ach · η Close off the jamming inlet or outlet openings 009827/1249 BATH ORIGINAL Ζ * (38 or 47) »if there is no I / Erkatück going through it. 17 «Device according to claim 16, characterized in that that the locking devices (38,44) eo arranged are »that they can be actuated by the workpiece moving through the chamber. 18. The device according to claim 17 _r, characterized in that the Abechludvorrichtungen pivotable flaps (38, 44) ein. Device according to claim 18, characterized in that the flap (38) provided at the loading end of the chamber inside the chamber and the flap (44) provided at the outlet end of the chamber in a tubular shape reducing the loss of vacuum when opening and closing this flap Ansät ζ (46) is subordinate. 20. Apparatus according to claim 18 or 19 »characterized in that the flap (44) arranged on the discharge chamber is due to the vacuum prevailing in the chamber and the flap (38) arranged on the JSinlßßeade öei- chamber by its own weight or by a ZusatagewScat is kept closed « 21. Device according to one of the Anopröche 9 <=> «? G, thereby known that the Kansmer sura protect their interior » wall at opposite the BUsenausläsöea with a lining made of soft, resilient, resilient Material is provided. 22. Device according to one of claims 9-21, daduroh characterized in that the guides (34,40,36 (47) on both Chamber ends from two on the two chamber parts (14,15) attached, and calibrated with these opening and closing sections. 0 0982 7/1 249 _r . ,,. BATH ORIGINAL 23 Device according to Claim 22, characterized in that that the .Yerketückeguides (34t40,36,47) can be built in two two-part, on the two chamber parts (14 * 15) attached housings (31 # 52) are arranged. 24 «gate direction according to one of the preceding claims, characterized in that a plurality of primary air supply lines (65) are provided on the blow chamber (10) is, and that the means sum up the introduction of the dands into them Lines from a first ring (97) at the bottom of a sand container (93) and with a number of Ueßdilsen (100) communicating with the inside of the container is provided and one below this DUsenring (97) arranged second ring (101) exist, the one with a number of open-topped, aligned with the MeCdUsen Sleeves (103) and a corresponding number of pipe sockets (106) is provided, each of which with a Sleeve (103) is connected and with one of the for Blowing chamber leading primary air lines (65) is connected. 25 · Device according to claim 25, characterized in that that the container (93) has a conical bottom (94) which distributes the sand on the ring (97) provided with the UeßdUeen (100). 26. A method for sandblasting a workpiece surface, in which an eye pressure is applied to a chamber formed using the workpiece surface as a wall is applied, an inflow of primary air into the chamber is caused by this suction pressure, wherein the entry of secondary air is restricted along the perimeter of the entire workpiece surface; the sand the primary air is added before it enters the chamber and the sand introduced into the chamber against the ./erkstUokfläche and the spent money ^009827/1249 BADOH.QINAL from the loft sucked out of the chamber is carried away «characterized in that after the Introducing the sand into the primary air «but before the Entry of the primary air sand framework into the chamber, Third air and the primary air and the sand is added. 009827/1249 BAD ORiQiNAL