DE1677183A1 - Coating device - Google Patents

Description

A 10 648

c - atr

January 31, 1968

£ »J. QUIHR & CO, INC., 195 Canal Street

Shop . Rabbit * Ί7

Loading device

The invention relates to a coating device with one Coating head for sealing a film of a coating material on a moving base, one arranged below the base and aligned with the coating head Collecting tray for collecting excess coating material, and with a line and a pump for reclaiming this excess in the, coating head

109848/0329

A 10 648
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31 January 1968

In the production of coated leather goods ζ .Β, for shoes or in the production of other coated products, the aim is to achieve a uniform thickness of the layer applied to the base, which should be free of irregularities and imperfections. In other applications it is also desirable to have the surface of the pad with a certain pattern, ζ .B. to be coated from strips or sparks

The previously known separation devices lacked a sufficiently high level of reliability with high performance at the same time. The main cause of inadequate or inadequate coating lies in the way in which the coating compound is applied to the surface of the base. In conventionally designed casting Be * schichtungeeinrichtungen in which the is pulled away to be coated mat under a falling? Ilm or curtain downwards of the coating composition, the most troublesome disadvantages of the layer due to the! Datsache that the falling I ¹ To liquid Material has an uneven dioke and is not always coherent across its width. Such irregularities in the preparation of the falling mime

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A 10 648
January 31, 1968
c - sir

produce waste in the on the surface of the underlay applied layer «such. B. gaps, grooves or ribs "

Provided that the coating compound present in the storage container

in

is not free from turbulence, these air bubbles can arise, which get with the coating material on the surface to be coated of the base, if the Beschiohtungsmassen with a GieS coating device with a Weir discharged from a feed tank, one wall of which forms the weir or dam, leads to emergence from turbulence in the coating to the fact that the mass flows unevenly and pulsating over the weir and thus Inconsistencies in the layer falling as a gate slope evokes.

The object on which the invention is based therefore primarily consists in developing the coating head of a coating device of the type described at the outset in this way to shape that the occurrence of turbulence in the flow of the coating mass on its way between the inlet in the coating head to the delivery point where the liquid gate slope forms, remains largely suppressed * Bas * The thickness profile of the resulting goal slope should, viewed across its width, run as continuously and evenly as possible; therefore, in particular, care should be taken to ensure that the

109848/0329

A 1Q 648,

31, 1. 1968 ti

Containment mass on the edge of the weir as a lump forms *

This object is achieved according to the invention in that the coating head has a trough arranged transversely to the direction of movement of the substrate and a pipe connected to the line and arranged parallel to it with a continuous longitudinal slot for dispensing coating material to the trough, and that at the upper edge of a side wall dee trough an approximately reversed U σ riaigen cross section exhibiting overflow weir is provided whose inner limb is immersed in the contained in the trough coating composition of which the outer leg has a unt em trailing edge, and the web of which connects the two legs with each other *

In a further embodiment of the invention it is provided that the pipe is arranged in such a way that the slot faces away from the weir and downwards.

The pipe suitably has a circular cylindrical cross-section

\ and parallel to this /

up, but the trough has two on both sides of the pipe b \ located on the right Walls and a vaulted floor connecting these two with each other.

109848/0329
The laminarity of the flow is favored _{ that all

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A 10 648
31 * 1, 1968
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surfaces of the coating head in contact with the coating compound be polished to a high gloss »

It is also particularly advantageous, the pipe for a. the position of the slot so that it can be rotated,

According to a further idea of the invention, the web of the overflow weir is between the inner and the outer leg arched in cross-section and the opening edge of the outer leg beveled in such a way that on the outer surface a cutting edge is formed on this leg "

Bs is also useful, the lower edge of the outer leg

of the weir to be shaped like a serration,

According to the invention, the lower edge of the outer « ?. 'one leg of the weir made of equal-sized »concaves, side by side arranged circular arc formed

2Ss eats advantageously, at the tips of the spikes for the same length of time, to arrange vertical needles.

The invention is explained in more detail with reference to the drawing; Show in it?

109848/0329
BAD ORfOINAt

A 1P 648 31 _? 1st 1968

α r etr

yig. 1 is a side view of a Beschiohtungseinrtchtung ait a Besohiohtungskopf according to the invention;

? ig. 2 shows a cross section according to section line 2-2 in FIG Pig. 1;

Pig «3 shows a longitudinal section through the coating head;

Pig. Figure 4 is a cross-section on the 4 x 4 in . 3?

Pig. 5 shows a cross section along the section line 5-5 in * ig. 3y

Pig. 6 is a top plan view of the lower end of one to one Coating head belonging to Vehree;

Pig. 7 is a plan view of the lower end of a wide Weir; and

Pig. 8 a plan view of the lower end of a third Weir.

Like from Tig. 1 shows »shows the loading device

109848/0329

BATH ORIGINAL

A 10 648
31. I ₀ 196a
c - sir

two horizontal girders 1 and 2 as well as a frame 3 that encloses and overpresses these two between them "The horizontal girders 1 and 2 are fastened to one another and each carry a belt conveyor 4" while the frame 3 carries a λ coating head 5 which is located above the belt conveyor 4 and is arranged at a distance from them. As can be seen from FIG. 2, the belt conveyors 4 have two conveyor belts 6 and 7 which are arranged parallel to one another and extend over the entire length of the horizontal beams 1 and 2. The conveyor belts 6 and 7 are driven by a controllable gear 8. The object to be coated, for example a piece of leather, is placed on a base, in this case a frame screen 9, which in turn is carried by the two conveyor belts and somtS; it * 5 is moved below the coating head. As with a conventional Giefi coating device, the coating head 5 is arranged on the frame 3 in such a way that its distance from the conveyor belts can be divided »

A film or curtain of liquid coating compound falls out the coating head 5 between the two conveyor belts 6 and 7 into a vertically aligned collecting tray 11, which is attached to the horizontal beam 2. The catch basin

109848/0329

A 10 648
31. 1 «1968

C * · BtT

It extends at one end over the frame 3 in order to discharge the collected coating material into a collecting basin. The collecting basin 12 has an outlet 1? which is connected to the coating head 5 via a line H. In the line H there is a circulation pump 15 which is equipped with conventional control devices for changing the throughput to be supplied to the loading head 5 can be optionally set by changing the speed of the belt conveyor 4, the throughput of coating material and the height of the coating head 5

Like out of the jig. 3, 4 and 5, the viewing head 5 has a trough 16 which is open at the top and consists of side walls 17t 17 *. End walls 18 and a curved bottom 19 consists. The trough 16 is made of stainless steel and has smooth surfaces on the inside. It is carried on both sides by the frame 3 and thus extends to the direction of travel of the material to be coated. In the *

cd inside of the trough 16 is the Beschlohtungsmasse on the

e> Trough dispensing Eohr 20 is arranged, which is also made of stainless steel and has high-gloss surfaces inside and out. The tube 20 has open ends "which are mounted on the end walls 18 in itagerbüohsen 21 and 22 of the trough 16" between the Sndsa ulqb tube 20 and the bearing bushes 21 and

BATH ORIGINAL

A 10 648
January 31, 1968

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22 Q Taken 23 and 24 sum sealing are provided, at the end of the tube 20, a hand wheel 25 'is attached _f with which the drilling can be rotated 20 from the outside "The handwheel 25 has a the drilling umsehliessenden, sleeve-shaped part on" To secure of the handwheel 25 against rotation on the drill 20, a pin 26 is provided which penetrates the chain-shaped rope of the handwheel 25 and engages an axial groove 2 provided in the drill end a retaining plate 28 is screwed on, which ensures that the handwheel 25 does not exceed a certain axial distance from the end of the drill

The coating compound to be supplied to the coating head 5 is first introduced into the interior of the tube 20. For this purpose the hand wheel 25 is provided with a concentric bore 29 «by means of which the line H can be connected. The bearing bush 22 located at the opposite end of the pipe is also provided with a bore 30 coaxial with the tube 20. The line 14 is preferably connected to the drill end carrying the handwheel 25, while the other end of the tube 20 is closed by a plug 31. Of the Plug 31 is equipped with an axial groove 31 ', which is used for Emptying of the bore 20 is brought to overlap with a bore 20 "provided in its jacket."

109848/0329

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A 1Q 64a 31st U 1968

As in the Pig. 3 and S, let the drill 20 nil; a continuous longitudinal sole seat 32 is provided; this extends practically over the entire length of the trough 16. Thus, the BeschioHtungemaeee fc fed to the drill 20 is delivered through the slot 32 to the trough 16. Ba custody of the Shiite "continuously over the entire length of the lively 16! Extends occurs over the entire length of the Sroges 16 in substantially uniform flow © άατ ^> ι therethrough ·

As shown in Pig. 5, the side wall 17 * of the trough 16 is provided with a weir 33; this forms the effective upper edge of the trough 16, over which the coating compound flows as soon as its level reaches the upper edge of the weir slightly curved web 35, the surface of which represents the overflow wall or the dam of the striker head 5, and a downwardly directed leg 36 which is arranged outside of the iroeg 16 and is directed in a Yertlkal plane onto the collecting trough 11 located below «Bas Wehr 33 is made of stainless steel ; its surfaces, touched by Besehlohtungsmaese, are polished to a high gloss. Bie lower edge 37 of the leg 36 is at an angle 30 ° ron angeXar

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and «was such that the sons id« ax ϋ & τ laasse-bertthrten side of the wall.

The Bohr 20 is sum Binatell © ?! of the exposure head 5 la operating position ssu & äehst so vördreatj that the slot 32 inclines downwards »dsS siö & but the Bofenmg 20 * with the |

Axial groove 31 * of the plug 31 does not cover "Then, into the tube 20 by de β β the handwheel s 25 supporting Sn.de liquid Beachicatungsmasee initiated" Eliminating the air from these by the Schiits 32 "olme on bubbles & surückbleifcen is verdräng" Once the Eobr 20 and the frog 16 © it Beachichtungeoaeee are filled "is the Ho br Ια working position yerachwerurtf with the SaKUte 32 facing away from the weir T3 in Eich · tang of the Iroget S " In this way the coating seam during a Beechiohtung ^ turgaiiges leg By typing through the Schiit »32 in the question 1 $ aa of a war 33 averted. Place against the smooth, curved bottom 19 of the trough 16 promoted. As a result of the discontinuation of Schiit se s 32 in Besug on the weir 33 vaai due to the construction of the loading

- * GOhiohtungekopfes 5 1st the one fed to the trough 16 and via ο

^ the weir 33 flowing coating mass free of $ urbulens,

C ₀ through which air bubbles could arise and in the

ο schiohtungskopf 5 outbound flow fluctuations * "-> would · the curved top surface of the weir 33 but ensures also that a constant and uniform over the weir FlÜBsigkeitemenge uad on its outer surface entlang-

BAD OBIG (NAl.

A 10 $ 48 - «Ζ «

strQiat, and «was curved because of the steady and slowly sloh changing flow direction along this upper one Surface of the weir 33 «When the coating liquid flows down along the surface of the weir ^ and when detaching from the lower edge 37, a continuous film of constant thickness is formed, the calibration as a result of the sons formed by the chamfering of the lower edge 37 easily separates from this. This way becomes a irregular draining avoided, which leads to an uneven surface thickness. would lead

That in? Ig. 6 illustrated embodiment of a weir 32 w, eist an outer leg 36, the lower edge of which is formed siokeaokftirmig, with a number of equally spaced tips 38 at W, which are interconnected by Xanten 39, two of which each form an inverted T. The lower edge of the weir 33 shown in FIG. 7 also has a serrated shape, but instead of a straight, serpentine shape, it has a number of spaced apart. arranged tips 40, which are connected to one another by concave arches 41. In Pig. 8 shown embodiment of a weir 33, the lower edge is similar to the embodiment according to Pig _e 6 by straight lines

109840/032 ^
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Sections are limited, however, each tip has $ 38 p $ right downward needle-like extension 42

With the weirs according to FIGS. 6 to 8, various coating boulders can be formed on the path moving below the falling liquid front. These different Huster can, for example, by changing the amount of over the weir flowing BesohichtungsflÜssigkeit be ersielt * Excluding flow off to the outer surface of the weir only a very thin layer of ¹ Beschiehtungsmasse do so. if this gums up at the tips of the lower edge of the weir, from which or from their needle-shaped extensions it drips off and thus forms a dotted master on the coated material. An increase in the amount of coating mass flowing over the weir leads to a continuous discharge Flow of the coating mass from the tips of the weir and thus to the formation of a linear pattern. A further increase of the amount of the current flowing over the weir Beschiohtungsmasse leads za a complete coverage of the material to be coated with a simultaneous production of thick at a distance from each other extending parallel lines, which are due to the fact that the Beschichtungsxnasse particularly easily by the downwardly facing tips of the weir edge drains.

BATH ORIGINAL

Claims (1)

• f # 77183 10 648 Pat entansprüohc BoBhiohtungeinriohtung with a soling head for oieflen a film of a Beehnungungemaese on a moving base, a set underneath the base, aligned to the Beschiohtungskopf and a collecting tray to absorb excess Beschiohtungsmasee, as well as a line and a pump for conveying the excess head back into the Beschioht characterized that the coating head (5) has a srog (16) arranged transversely to the direction of movement of the base and a pipe (20) which is arranged parallel to this and is connected to the line (14) and has a continuous longitudinal slot (32) for dispensing coating material to the trough (16), and that on the upper edge of one side wall (17 *) of the Irog (16) an overflow weir (33) with an approximately inverted U-shaped cross-section is provided »its inner leg (34) into the in the frog (16) located coating maese is immersed, the outer leg (36) of which has a lower run-off edge (37) f, and its web (35) the two legs (34 _t connects with each other. 109848/0329 BATH ORIGINAL 10 64β ? 1, 1st 1968 he »tr 2 «BeeoMehtiuigseinrichtung naoh claim 1, characterized gekennieiciiiie t, that Bohr (20) so arranged let that the Sohlita (52) leave the weir (33) <~ turns and is directed downwards " 3 · Loading device according to claim 1 or 2, characterized in that the pipe (20) has a circular cylindrical cross-section, and that the yand parallel gudleaen / trough (16) two both sides due to RoaresfSage orders β, perpendicular te rare wall (17 »17 ^f ) and a geJkrusoatan bottom (19) that warrants these two · 4 · Coating device according to one of claims 1 to 3f characterized ₉ that all surfaces of the layering head (5) which are in contact with Beaohichtungamasse are polished on Eochglans surfaces 5 · Coating device according to one of Claims 1 to 4 » 'characterized in that the drill (20) sram setting the position of the Schlitzet »(32) is rotatably mounted» 6. Loading device according to one of the address 1 to 5, characterized in that the Bar (35) of the overflow weir (3Ϊ) between the inner (34) 109848/0328 BAD OFUGINAU VU 1968 / If c - etr and the outer leg (26) is arched in cross-section, and the lower leg (37) is the outer Leg (36) is chamfered in such a way that a son's silk is formed on the outer surface of the leg (36). 7 »supervision device according to one of claims 1 to 6, characterized in that the lower edge of the outer leg (36) of the Wehree (33) zaekenfönaig (71g · 6). 8 «loading device according to one of claims 1 to 6, characterized »that the inner edge of the outer leg (36) of the weir (33) equal-sized, concave, juxtaposed circular arcs (4-1) are formed 9 · Loading device according to claim 7, characterized in that characterized in that the tips of the prongs are extensions in the form of vertical needles of equal length (42) show « 109Ö4S / 0329
BATH ORIGINAL Leeward