DE1189354B - Method and device for coating with soldering metal and marking a strip of low-melting metal, in particular lead - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

C23c

German class: 48 b -1/04

Number: 1189 354

File number: L16855 VI b / 48 b

Filing date: October 14, 1953

Opening day: March 18, 1965

The invention relates to a method and an apparatus for coating with solder and for marking a narrow band of low-melting metal, especially lead. An area of application for metal strips treated in this way the production of double glass panes is at where such a metal band runs between two flat panes of glass around their circumference, the Holds panes at a distance from each other and soldered them with metallic coatings on the pane edges is, so that there is a hermetic seal for the interior space between the panes.

The application of a solder coating on a narrow band of low-melting metal presents difficulties in that the solder must be applied in a molten state and has a temperature at which the low-melting metal already becomes soft begins.

The marking of metal strips has also required considerable effort up to now. According to a well-known In the process, the metal is first provided with a coating, such as paint, and then dried. Then the marking is printed onto the cover and the print is dried again. Finally, another layer of resin varnish is applied and this is also dried.

In contrast, the invention consists in the use of the process for continuous coating an iron band with a solder, the pre-cleaned band by a flux bath, passed a solder bath and an oil bath and then subjected to a cleaning and drying treatment is, on the coating of narrow strips of low-melting metal, in particular Lead, markings are then imprinted into the coating.

If the low-melting metal strip is fed continuously through the individual treatment stages in a manner similar to that known for wide iron strips, it can be run through the high temperature treatment devices, especially the solder bath, at such a rate that the tape is not heated in a disturbing way and becomes too soft, but despite this speed it receives a perfect solder metal coating. Conversely, the solder metal coating and the low-melting tape have such a softness by their nature that, as a result of the temperature treatment, can also be increased that marking can be achieved by pressing in with extremely little force. Method and device for coating
with solder and marking a tape
made of low-melting metal, especially lead

Applicant:

Libbey-Owens-Ford Glass Company,

Toledo, Ohio (V. St. A.)

Representative:

Dipl.-Ing. H. Seiler, patent attorney,

Berlin 19, Oldenburgallee 10

Named as inventor:

Emmett Leo Walters, Toledo, Ohio (V. St. A.)

Claimed priority:

V. St. v. America June 5, 1953 (359 792) -

can be. Such an indentation mark can be embossed directly into the solder coating. It is permanent and does not require any follow-up treatment.

Since the normal working speed is when inserting the beginning of a narrow belt low-melting metal can not adhere to and then there is a risk that the tape in the solder bath melts or tears, it is advisable to use the narrow band of low-melting metal A starting piece made of higher melting metal is to be connected upstream.

According to the invention, a device is suitable for carrying out the method in which the longitudinal a processing line one behind the other a pre-cleaning device, a container with molten Solder, on the inlet side of which there is a flux bath and on the outlet side of which there is a Oil bath is located, a further cleaning device and a drying device are arranged with the feature that a marking device is arranged downstream in the processing line is made up of a pressure member engaging with the coated tape and one the tape with the pressure member aligning guideway. So that the tape does not have any inadmissible loads is subjected in the conveying direction, the pressure member can be made of one with the belt conveyor

503 519/352

speed rotating embossing roller and an associated pressure roller exist. From the following Describing there are other characteristics of the aligning device that allow Always feed tapes of different widths centrally under the embossing roller and an automatic one Allow adjustment of the alignment device to different bandwidths.

An embodiment of the invention is described below in conjunction with the drawings explained in more detail. It shows

F i g. 1 part of a double pane of glass in which the tape produced according to the invention is used, in section and in three-dimensional representation,

F i g. 2 shows a section through the with solder coated metal band on an enlarged scale,

F i g. 3 the start of the metal strip to be coated with solder in a spatial representation,

F i g. 4 shows a device suitable for carrying out the invention in side view,

F i g. 5 the exit end of the device with the marking device in an enlarged side view,

F i g. 6 shows the guide frame for the tape in a plan view along the line 19-19 of FIG. 5,

F i g. 7 shows a vertical section of FIG. 6 along line 20-20,

F i g. 8 shows a vertical section of FIG. 5 along line 21-21,

9 shows a vertical section of FIG. 8 along the line 22-22,

F i g. 10 a vertical section through the storage for the embossing roller,

11 shows a vertical section of FIG. 5 along the line 24-24;

F i g. 12 is a rear view of the FIG. 5 illustrated outlet end of the device,

13 is a three-dimensional representation of part of the tape after the solder has been applied and after marking,

14 shows a three-dimensional representation of the guide frame for the tape and

F i g. 15 is a vertical section of FIG. 8 along line 28-28.

With the help of the invention, a band 10 made of low-melting metal, in particular lead, is to be included a coating 17 (FIG. 2) made of solder and a marking (FIG. 13) can be provided. An important The intended use for such a tape is shown in FIG. 1 shown in the form of a double pane of glass 14. Here, the tape 10 finished according to the invention is used as a separating strip 11 between two panes of glass 12 and 13 used. Before they are assembled, the glass panes 12 and 13 are attached to their Edges with a metal coating 15, for example a copper alloy, provided with a layer 16 is covered with tin or other solder. After the glass panels 12 and 13 as well the separating strips 11 have been brought into the correct position to each other, are by local heating part of the coating 17 and the coating 16 are melted. The melted solder the coatings combine to form fillets 18 on each side of the separating strip 11, and there is a permanent, tight seam between the separating strips 11 and the glass panes 12 and 13. The coating 17 remaining on the separating strip improves the tightness of the Double pane of glass insofar as it closes small holes and tears that are present in the band 10 could be.

In Fig. 4, a preferred form of the device according to the invention for coating with solder and for marking the tape 10 is shown. Here, a certain length of the tape 10 is drawn off from a feed drum B on the input side and, after passing through the device ^, is wound onto a take-up drum C at the exit end.

In device A , the strip 10, after pre-cleaning by dry brushing, passes through a washing chamber D, a drying device E, a soldering bath F, on the surface of which a flux bath is arranged on the inlet side and a palm oil bath on the surface of which on the outlet side, a second washing chamber G , a further drying device H and a marking device 7. The various parts are mounted on a supporting frame / which is partly covered by cladding to prevent the particles removed from the belt from splashing and to protect the individual elements of the device.

With the aid of such a device, the strip 10 can be treated continuously at such a speed that it is only exposed to high temperatures, in particular in the solder bath F, for a short time that no harmful softening occurs. For example, one can use a tape made up of 97 parts lead and 3 parts antimony and create a solder coating 0.075 mm thick on this tape. Of course, you can use a solder with a relatively low melting point, for example an alloy of 23 % tin, 40% lead and 37 % bismuth, which is useful in a range of 188 to 193 ° C. However, the starting length of a tape 10 cannot be pulled through the solder bath at the required operating speed. Therefore, as shown in FIG. 3 shows a guide piece 19, z. B. made of sheet iron is used. Flexible links 20 made of any material, e.g. B. glass fabric, hold the guide piece 19 and the tape 10 using clips 21 and 22 together. Since the guide piece can withstand higher temperatures, it can be passed through the device at slow speed.

The feed drum B is detachably seated on a shaft 23 which is held by a bracket 25. For this purpose, the side plates 34 of the drum are held between clamping plates 27 which can be pressed together with the aid of a wing nut 30. A brake ensures that the drum cannot unwind too quickly. The belt 10 is drawn through the device A with the aid of drive rollers 41, 42 and 43, which preferably have a rough surface in the manner of a grinding wheel. These drive rollers are rotated with the aid of a common chain drive. Their bearings are adjustably attached to threaded rods 47 which extend between frame longitudinal beams 49 which are held at their ends by uprights 50. The uprights are attached to U-irons 51 at the bottom, which together with U-irons 52 form a base frame for the scaffolding.

held, which in turn sits on a bracket 243. Again, with the aid of clamping plates 246 and a wing nut 249, the drum C can be locked on the shaft.

In the area of the marking device / the tape is moved forward with the help of a Guide frame 148 (Fig. 5) controlled. This frame is attached to the scaffolding by means of a vertical plate 149 attached, on the one hand to the adjacent

Pair of washing brushes 65 io th stand 50 and on the other hand on a strut 150,

which sits on extensions 49 'of the struts 49. A second plate 149 is on the rear of the frame 7 attached (Fig. 8). Both plates are used together to hold the embossing rollers.

The frame 148 consists of vertical struts 151, which are secured with the aid of bolts 152 and nuts 155 are attached to an angle iron 153, which in turn is screwed to a flange 154 of the plate 149 (see. Figs. 5 and 8). The Struts 151

When the tape comes off drum B and over
the roller 41 is pulled, it runs through a
guide tapering conically towards the framework
53 which apply the tape directly to the surface of the
Roller 41 conducts. The drive roller 41 is assigned an idling counter roller 54. Foreign bodies from both surfaces of the
Tape removed. The washing chamber D is located
in a sheet metal housing 62 with a removable
Front wall 63. A first
has bristles made of metal wires, a second
Washing brush pair 66 bristles made of ordinary fibers. At the same time, water is at around 60 to 66 ° C
fed via a line 71 and sprayed over the upper side of the belt, so that oxidized surfaces 15
layers and dirt is removed from the tape. The water can through a pipe 76 that is in a
Drain pipe 77 opens, run off. In the subsequent drying device E , air is blown over the belt surfaces in order to carry away all moisture. Slots 156 with semicircular recesses. For this purpose, an air supply line 84 is cut 157 (FIG. 14) at its upper ends and an outlet connected to the discharge line 77 can accommodate a rod 158 there, which is provided with line 85. With the help of screws 159 it is clamped. the

The drive roller 42 is an idle counter rod 158 carries outside the struts 151 L-shaped roller 87 assigned. The belt 10 is on the 25 cantilever pairs, namely an inner pair 160 and a Roller 42 deflected downwards. To vibrations outer pair 161. The outer ends of the horizondes To prevent tape is located below talen leg 162 carry a ball bearing 163, with the roller 42 is a guide funnel 91, which the belt they are pivotable around the rod 158. Zwiin the inlet opening 102 'of the container 93 with the see the boom is a spacer ring Solder bath conducts. The structure of this container with 30 164. The arrangement is through in grooves 166 of the locking rings 165 gripping its heating devices, temperature control rod 158, devices, tape guide and deflection device- Each pair of arms 160 and 161 is through rods

lines and the like is held together for an understanding of the invention 167 and 168 (FIGS. 8 and 14). insignificant. It is important, however, that the rods grip through bearings 170 on the soldering metal bath in the area of the inlet opening 102 '35, the connection point between the horizontal leg a flux bath is through which the tape 10 162 and the vertical leg 169 each Ausvor before entering the solder bath. To this end, the outer ends have is guided, and that on the top of the rods a portion 171 with reduced Solder bath on the exit side a palm oil bath diameter and a threaded end 172. On the is located by the tapered portion of the tape after pulling 40 sit except for the bearings 170 with solder running through it. Excess oil becomes connecting links 173 and 174 as well as a spacer ring 175. This arrangement is secured with the help of nuts 176. The links 173 and 174 are equipped at their other ends with ball bearings 45 177 in which a rod 178 is in slots 180 'is guided at the lower ends of the struts 151. It can therefore move vertically.

This arrangement causes any movement exerted on one cantilever or pair of cantilevers to be moved. The further drive takes place with the aid of 50 movement inevitably to a counter-rotating movement of the roller 43. Subsequently, the belt enters the direction of the opposite pair. In this way, on the washing device G, which is located in a housing 131, upper ends of the vertical legs 169 can be one. Two pairs of brushes 132 and 133 process guide tracks for the belt 10 to be formed. To the coated tape under the action of hot for this purpose, each pair of arms 160 and 161 carries water. The water is supplied again via 55 U-shaped plates 181 and 182, which are screwed to the top of the line 71, while the used water legs 169 are screwed. It is preferably discharged via the drain line 77. After the legs 169 of the cantilever pair 161 are somewhat over the band of only loosely adhering solder particles than those of the cantilever pair 160, so that the palm oil is cleared from and, it is in the plate 182 above the plate 181 and between device H, which is the Drying device £ a limited passage is formed from them. That speaks, dried again. lateral limitation of this passage is through

This is followed by a further pair of drive rollers 142, 143, pins 183 shown, the pairs in longitudinal rows the marking device to be described in more detail later in each leg of the plates 181 and 182 / and another pair of drive rollers 232 are brought. The pins 183 protrude from the plate 182 233. Via a guide 234 and one the belt 6g axially downwards and from the plate 181 upwards; she Guide device displacing the drum C each engage in slots 184 on the opposite side the tape 10 finally to the winding plate and are by the weight of the Drum C. This is removable on a shaft 250 frame 148 from both sides against the belt 10

wiped with a scraper. aside from that
Coolers can be used to
rapidly solidify the solder coating
bring.

Above the solder bath F , the tape 10 is by means of
a roller 113 reversed, which is preferably a
Rubber cover with a groove so that the tape wears
does not slip and continues in a straight line.

7 8

pressed. With a slight change in width of loosening the nuts 216, the sleeves 214

Band 10 will either twist out the first pair of pins and thereby reduce the distance between the

pressed each other or pushes closer together- blocks 203 and 204 change or change it with the

men. This movement is transmitted directly to the state of the cantilever arms 160 and 161 belonging between the journal bearings 189 and 190, so that there is

the entire width of the guide passage

changes. In this way, the centerline of (Fig. 11) remains fixed on its shaft 187 while the

Tapes of different widths always in the sliding pressure roller 186 in the same way on their shaft

chen location. As one can see from FIG. 3 recognizes that 188 is wedged. The embossing roller 185 is made of several fronts The end of the guide piece 19 is tapered; in the 10 reren parts put together so that the embossing blocks

Insertion of the tape pushes this tapered piece 222 easily replaceable. To this

automatically the frame 148 to the required purpose, the embossing roller consists of an annular

Width of the guide passage apart. Disk 220 with radial, wedge-shaped incisions

In the one between the U-shaped plates 181 and 221 (Figs. 5 and 11). The blocks have a groove 223,

182 left free space is the band 10 15 with a groove 224 in the face of the disc

of an embossing roller 185 and a lower anvil 220 coincide. A plate 225 with a ring

pressure roller 186 detected, the on shafts 187 and 188 shaped projection 226 is on the shaft 187 and

sit. To the shafts pushed in an exactly parallel against the disk 220, so that the front

To keep a distance which engages in the grooves 223 and 224 of the thickness of the ledge 226. the

of and / or the height to be exercised during embossing - plate 225 and washer 220 are screwed

Depending on the pressure, the shafts are firmly connected to one another in pin 227. A clamp washer

bearings 189 and 190 , which are adjustable on the 228, hold the embossing roller firmly on the shaft and press

Plates 149 (Figs. 8 and 9) are attached. This is done against the plate 209. A nut 229 is used

splints with the help of plates 191 and 192, which locks the whole thing on the shaft 187. In a similar way

Plates 149 by screws and nuts 193 - 35 way can also the pressure roller 186 with a

are hold, the screws through slots 194 pressure plate 228 and a nut 229 on the

engage the plates 149. associated shaft 188 are attached.

Dip the lower edges of the plates 191 and the embossing blocks 222 are intended to carry symbols that

upper edges of the plates 192 are angled to indicate manufacturing dates. aside from that

ordered surfaces 195 and 196 with grooves 197. Wedge 30 can alternately reverse the information

shaped blocks 197 ' with mutually inclined surface direction, so that the embossing is easy both

Chen 198 are read between the angled surfaces 195 from one direction as well as from the other

and 196 are set, protrusions 199 can be inserted into the grooves. The embossing can also, for example

197 intervene. Each block 197 has a thread - the make of the manufacturer or the date of the

Have a hole for receiving a rod 200 with in 35 completion of the tape.

Counter-thread cut ends. Also the other pairs of rollers are against each other

If you screw this rod, the blocks 197 'become adjustable. As an example, the two drive

moved against each other or apart. As a result, rollers 232 and 233 are viewed, their shafts 232 '

the plates 191 and 192 respectively rest in and 233 'in bearings 146, which in turn with

shifted in the vertical direction. In their regulated 40 the help of nuts 147 on threaded rods 47

th position, the panels are height-adjustable by means of adjusting screws 201.

held, which in brackets 202 on the upper The device is with the help of an electric

and lower parts of the plate 149 are screwed in. motor 267 driven on a strut 268

So that the embossing roller 185 and the pressure roller are fastened between two uprights 50 (FIG. 4). 186 retain their desired spacing, 45 are two additional spacers anvorgesehen adjacent the rolls systems with different speed ^{about em} pulley countershaft 274th This includes a pair of blocks 203 driven. One system includes all and 204 that each accommodate a ball bearing 205. From circulating at the conveyor speed of the belt-F i g. 10 it can be seen that the outer ball bearing - the rollers, in particular the drive rollers; to ring with one engaging in a groove 206 in the block 50 belong to the other system, which is locked with larger Geden retaining ring 207. The inner ball speed rotating parts, in particular the bearing ring, rests on the hub 208 of an annular brush in the cleaning and washing devices. Plate 209 and is locked with a retaining ring 210. As an example, a part of the first-mentioned system may be used. The plate 207 is explained on the associated shaft 187. It is pushed with the help of a belt 281 and is driven there with a conical pin 211, which is held by a non-illustrated belt. The block 204 corresponds to the block 203. Human disk on the shaft 144 (Fig. 12) of the an-A threaded rod 212 (Fig. 15) holds the two drive roller 142 is placed. On the same shaft blocks at the set distance. For this purpose, there is a toothed wheel 290, with the aid of which the lower block 204 is simply pierced vertically and the upper run 265 α and the lower run 265 b are provided with a thread, so that the endless chain 265 that is threaded 60 is driven. This rod 212 is secured with the aid of a nut 213. The chain is looped around in the manner shown in FIG. The block 203, on the other hand, accommodates a sleeve area, an idle gear 291, a tooth 214 , which bears at the bottom with a flange 215 and wheel 230 is held on the embossing roller shaft 187, an empty lauoben with the help of a nut 216 . The rod 212 is received in an internal thread on the upper 65 gear 285 on the shaft 233 'of the drive roller end of the sleeve 214 . Furthermore, the 232, an idle gear 286 at a similar upper end of the sleeve carries a hexagon 217 and borrowed cantilever 284, a slot 218 behind the gear 298 corresponding to a castle nut. After toothing arranged on the same shaft as the same

rad, an idle gear 288, a gear 231 on the shaft 188 of the pressure roller 186, an idle gear 289, a gear 290 on the shaft 144 and an idle gear 293. When this chain 265 moves, the rollers 142, 143,185,186 , 232 and 233 rotated in the correct direction and at the correct speed.

With the aid of a chain 297 , the rotary movement is directed from a gear 298 seated on the shaft 232 ' to a gear 299 on the drive part 251 of the drum shaft 250 . From there, in turn, a chain 264 goes to a toothed wheel 263 which drives the shaft of the guide device 235.

Claims (6)

Patent claims: 1. Application of the method for continuously coating an iron strip with a Solder, the pre-cleaned bath by a flux bath, a solder bath and a Oil bath and then subjected to a cleaning and drying treatment on the Coating of narrow strips of low-melting metal, in particular lead, whereby Finally, markings are pressed into the coating. 2. The method according to claim 1, characterized in that the narrow band from low-melting metal is preceded by a starting piece made of higher-melting metal will. 3. Device for performing the method according to claim 1 or 2, in which a pre-cleaning device, a container with molten solder, on the inlet side of which there is a flux bath and on whose outlet side there is an oil bath, a further cleaning device and a drying device are arranged one behind the other along a processing path are characterized by a marking device (/) connected downstream in the processing line, which consists of two pressure members (185, 186) engaging with the coated band (10) and a guide track aligning the band with the pressure members. 4. Apparatus according to claim 3, characterized in that the pressure members consist of an embossing roller (185) rotating at the belt conveyor speed and a pressure roller (186) . 5. Apparatus according to claim 3 or 4, characterized in that the guide track consists of a lower and an upper plate (181,182), between which the belt (10) is passed, the plates mutually movable, engaging on the belt sides guide pin pairs (183) exhibit. 6. Device according to one of claims 3 to 5, characterized in that the plates (181, 182) are connected to two mutually coupled, mutually pressing and pivotable arms (160, 161) . Considered publications:
German Patent Nos. 302440, 516 208;
Austrian Patent No. 144 901;
British Patent Nos. 287,436, 369,368;
U.S. Patent Nos. 1907,890, 2,357,970;
"Metalloberfläche", 1953, edition B, p. 8/9;
"Iron Age", 168, (1951), No. 5, pp. 86-89. For this purpose 2 sheets of drawings 509 519/352 3.65 © Bundesdruckerei Berlin