DE2106544A1 - Electroplating device - Google Patents

Description

This. Current time 3318/71

Langhein & Co., Apparatebau, 4811 H e e ρ e η near Bielefeld,

Stieghorster Str. Ilo5

"Electroplating device"

The invention relates to an electroplating device with a material to be electroplated (goods, molded parts) receiving, pivoted back and forth in a support frame, pendulum drum equipped with shell-side passage openings for a medium.

Pendulum drums for electroplating devices are known in various designs and cross-sectional shapes; the known drums have the disadvantage of a cumbersome construction and costly manufacture. Continue to allow the known drums only have a relatively low power consumption, which means a longer treatment time of the galvanically

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requires noble parts and is therefore more expensive. Furthermore, the cathodes of the drums are attached to a complex, contact frame that extends inside the drum and is connected to an electrical line as a power supply, whereby a complex and unfavorable power supply is available.

The object of the invention is to create an improved electroplating device that is simple, stable and durable built-in pendulum drum that enables high power consumption.

Another object of the invention is seen in a simple and safe power supply for the pendulum drum.

Furthermore, the swinging movement of the pendulum drum should be simple, be controlled safely and trouble-free.

According to the invention is an electroplating device according to initially mentioned type characterized in that the pendulum drum in cross section several together to form a filling and emptying opening leaving free heart shape has connected wall parts and adjacent wall parts respectively at a common, at the same time a bearing point for a part of its cross-section enclosing therein and with a power supply connected contact web forming reinforcement profile welded and the wall parts and the reinforcement profiles are attached by welding to the end walls closing the drum.

In a preferred embodiment, the pendulum drum is made up of two cross-sections corresponding to a partial area of a circular ring and two wall parts, which are curved and straight in cross section, are formed with their edge regions on the connection side in recesses of the two adjacent wall

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Edging reinforcement profiles holding manure parts and welded in these areas on the inside and outside of the drum are. Each reinforcement profile has a bearing receptacle with a dem that extends over the entire length of the drum Contact web cross-section adapted cross-section and takes in this bearing receptacle (recess) each one of two, in Their abutment area interconnected cathode rods formed contact web detachably - each contact web lies free for contact with the parts to be galvanized with a part of its cross-section in the drum.

The wall parts and reinforcement profiles of the pendulum drum are preferably made from polypropylene.

On the outside of each drum front wall there is a metal core and a detachable contact part, preferably made of rubber, encasing this on all sides attached, with the cathode rods extending through the drum end wall and an electrical power supply line is connected in a contact-locking manner. That also in the area of his Fastening means insulated contact part stands with a threaded bolt of each cathode rod in the area of its metal core in contact and has a connector for the electrical line, which is also surrounded by the insulation layer.

At one end of the pendulum drum, a switching disk is fixed in motion around its bearing journal, which with several provided at a distance from one another and with one with initiators for controlling a drive device that rotates the drum equipped control device is equipped with contactless cooperating metallic exciter plates.

The exciter plates on the switching disk cause the rotation of the drum to stop when an initiator is covered Direction and drum reversal in the event of a fault in the initiator as a safeguard and also a limitation (termination) of the pivoting movement of the drum in its emptying position.

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This control device is attached to a device which is suspended from the drum with the support frame.

Further features of the invention emerge from the other subclaims.

The subject matter of the invention extends not only to the features of the individual claims, but also to their combination.

The electroplating device according to the invention shows more advantages A pendulum drum that is simple and cost-saving, easy to manufacture and has a long service life. This pendulum drum, which is formed from individual wall parts, preferably from polypropylene, enables higher power consumption than the previously known drums and thus results in an extremely gentle treatment of the items to be electroplated with a shorter treatment time.

Furthermore, this drum is equipped with conveniently arranged contact bars (cathode rods) that ensure a reliable power supply. equipped, which is simply stored in the pendulum drum and outside the pendulum drum by one on the same attached contact part are electrically connected.

This contact part, which is present on each drum side, connects all of the contact webs arranged in the drum and is over an electrical line connected to a power supply part. The contact bars can be exchanged in an inexpensive manner Bearing pendulum drum, so that the service life of the drum is increased.

The contact bars can be exchanged quickly and easily.

Due to its construction, the entire pendulum drum is stable and allows a large filling weight.

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The control of the pendulum drum in its two swivel movements and the emptying position is easy, safe and trouble-free and for every treatment station individually adjustable.

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In the drawings, an exemplary embodiment of the invention * is shown. Show it :

Fig. 1 is a perspective view of an electroplating device with a pendulum drum pivoted in a support frame and a Treatment bath tank in the raised position of the drum with support frame,

2 shows a cross section through the assembled from several wall parts to form a heart cross-sectional shape Pendulum drum with contact bars and one attached to the front of the drum Contact part,

3 shows a longitudinal section through the pendulum drum suspended with its support frame in the treatment bath container with gear motor for the pendulum drum, attached to the front of the pendulum drum Contact parts with connector and to a busbar on the support frame guided electrical line and one attached to a drum bearing journal and one attached to the container arranged control device interacting switching disk,

Fig. Ή a section "A" according to FIG. 3 of the conductive

Connection between the contact web mounted inside the pendulum drum and the one on the drum at the front mounted outer contact part,

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Pig. 5 shows a section "B" according to Pig. 3 of the contact part with connector and attached electric cable,

6 shows a detail "C" according to FIG. 3 of the connection two cathode rods forming a contact bar inside the pendulum drum,

7 is a schematic end view of a pendulum drum with metal plate on the front as exciter plates having switching disk and a control device provided on the treatment bath container with two initiators, in a swiveled drum position,

8 shows a schematic end view of the same switching disk according to FIG. 7 in the opposite pivoting position.

An electroplating device according to the invention for electroplating The finishing of goods (molded parts) has a shell-side that is mounted in a support frame Io so that it can be pivoted back and forth equipped with passage openings 11 for a medium pendulum drum 12, which by means of two opposite, one Pivot axis forming bearing pin 13 is rotatably and releasably held in the support frame Io.

The pendulum drum 12 shows in cross section several together to form a filling and emptying opening 14 Heart shape connected wall parts 15, 16; the wall parts 15 are formed in cross section by parts of a circular ring and the wall parts 16 each have an arcuate cross section and an adjoining straight line Sub-area.

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Adjacent wall parts 15 and 15 as well as 15 and 16 are each supported by a common, simultaneously one bearing point 17 for a contact web which encloses a portion of its cross section therein and is connected to a power supply 18 forming reinforcement profile 19 connected to one another. The individual wall parts 15, 16 of the drum 12 are through Welding on the reinforcement profiles and by welding on the end faces that close the drum 12 on the end face Front walls (front disks) 2o attached.

For welding connections between wall parts 15, 16 and reinforcement profiles 19 grasp the connection-side edge regions of the wall parts 15, 16 in recesses 21 of the preferred embodiment Way of extruded profiles formed reinforcement profiles 19.

Each, for example, a circular, square or oval Reinforcing profile 19 showing cross-section has a cross-sectional shape of the contact web running over the entire length of the profile adapted bearing recess 17 and on both sides this bearing recess 17 each have a recess 21 formed by a notch (step) for the wall parts 15, 16, which are welded to the reinforcement profiles 19 in the area of these recesses 21 on the inside and outside of the drum are.

It is preferred that each contact web 18 of two coaxially arranged, to form conductively connected cathode rods, which advantageously have a circular cross-section own.

Corresponding to this cathode-rod cross-sectional shape, each reinforcement profile 19 has a part-circular recess as a bearing receptacle 17 in which the two coaxially extending cathode rods 18 are mounted and from which a partial area protrudes for contact with the molded parts to be electroplated (exposed).

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The heart shape of the pendulum drum 12 is, for example, through four wall parts 15 »16 are formed, which are connected to one another by three reinforcement profiles 19. The two neighboring ones Partially circular wall parts 15 represent the bottom area of the drum 12 and each wall part 15 is closed with its arcuate area a wall part 16, the rectilinear partial area with the opposite wall part 16 delimits the opening 14 at the top.

The reinforcement profiles 19 engage with their two front ends in a partial area of the wall thickness of the front walls 2o Recesses 22 a.

The wall parts 15, 16 are on the inside of the drum by ribs 23 and in the area of the filling and emptying opening 14 stiffened by webs 24 on the outside.

The wall parts. 15,16, the reinforcement profiles 19, the End walls 2o and the stiffening ribs 23 and webs .24 of the pendulum drum 12 are made of plastic, preferably of Polypropylene, and the wall parts 15, 16 are brought into the respective cross-sectional shape by hot deformation (bending) been.

The wall parts 15, 16 each extend in a preferred manner over the entire length of the drum and are thus made in one piece over the entire length of the drum; however, they can be formed from several parts in the longitudinal direction of the drum.

Each of them running on the roped drum length and consisting of two coaxially arranged, in a common bearing seat 17 of the reinforcement profile 19 mounted cathode rods 18 formed Contact web is in the central longitudinal area or on any area of the contact web length with a bridge 25 from one non-conductive material held on the drum 12 releasably; this bridge 25, which is made of plastic, for example provides between the two coaxial cathode rods 18 a

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binding and covers one at each end Pin 18a of the adjacent contact web ends as well as is through a screw bolt through the reinforcement profile 19 26 and a screwed thereon, on the outside of the drum lying nut 27 or the like. detachable in the connection area of two Cathode rods 18 fixed in terms of position.

Each cathode rod 18 grips with its end facing away from the plastic bridge 25 through the drum end wall 20 through and is covered with an insulating layer 28 » isolated on the outside of the drum end wall 2o releasably attached and a connector 3o for an electrical Power supply line 31 having contact part 32 with a contact fit tied together.

The contact part 32 is formed by a metal core (metal plate) 29 with a metal connection piece 3o provided on it and an insulation layer 28, preferably made of rubber, surrounding this metal core 29 and the connection piece 3o on all sides except for contact points with the cathode rods 18 and the power cable 31 ( see Pig. ¹ J and 5).

The cathode rod 18 reaches through in each case under contact closure the contact part 32 with a threaded bolt 33 and is screwed onto this threaded bolt 33 on the outside and covered by an insulation cap 3 ^ nut 35 or the like. releasably connected to the contact part 32; the contact closure between cathode rod 18 and contact part 32 takes place within the bore of the metal core receiving the threaded bolt 33

2o
The contact part 32 provided on each drum end wall / on the outside extends partially annularly around the drum bearing axis 13 and is detachably fastened to the drum end wall 2o by means of several screws 36 with nuts 37 engaging through holes lined by the insulation layer 28.

The connecting piece 3o extends in an end region of the

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partially annular contact part 32 and has a bore 38 in which a contact pin 39 of the moisture-insulated Surrounds electric wire 31; the electrical line 31 is through a threaded contact pin on its 39 screwed on and covered by an insulation cap 4o nut 41 releasably connected to the connecting piece 3o. All cathode rods 18 are thus supplied with current from this connector 3o provided on each contact part 32.

The support frame Io can be detached from one another by means of tie rods 42 connected support plates 43 is formed and takes the drum journals 13 rotatable open. A drive device 44, preferably a geared motor, is mounted on this support frame Io for example with its drive pinion 45 via an intermediate gear 46 is connected to a fixed movement on the drum 12 in a drum front end gear 47 and the Pendulum drum 12 set in the reciprocating pivoting movement.

The support frame Io shows on its two support plates 43 each two bearing journals 48, with which the support frame Io with pendulum drum 12 as a transportable unit in receptacles (forks) 49 of a device, such as treatment bath container 5o, Füllbzw. Emptying container (station), drying oven, transport device 51 or the like. can be attached.

The support frame Io shows on its two support plates 43 each a busbar 52 to which the current line 31 leading to the contact part 32 is connected. The power supply for the Pendulum drum 12 is provided by a low voltage source with high amperage and low voltage (e.g. 75o A and 15 V). In this case, a front-side power supply line 63 connected to the receptacles 49 and the one enclosing therein Bearing pin 48 brought the current to the busbar 52, from which it was connected to the line 31 to the cathode rods 18 (via the insulated contact part 32) can get,

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Attached to a frame end face is provided separately the power supply for the drive motor 44 via a arranged on the frame Io contact means 53 'is provided, wherein this contact means 53 when inserting the barrel 12 into the bath container 5o with a 5o arranged on the container mating contact means 5 $ connects; three-phase current is used for the drive 44, which is fed to the mating contact device 54 through a feed line 64.

At the end of the drum opposite the geared motor 44, one with the same is rigid with respect to its bearing pin 13 connected switching disk 55 made of plastic attached to which several metallic exciter plates, preferably metal plates 56,57,58 are attached, which with a on the device 5o, 51 releasably arranged control device 59 for controlling the Drum 12 interact without contact in its two pivot positions and the filling or emptying position. On the switching disk 55, for example, five are arranged at a distance from one another and on three different diameters Metal plates 56, 57, 58 arranged, two of which are approximately opposite metal plates 56 on the smallest diameter are arranged and serve to limit the drum pivot end position. Two roughly opposite and opposite Metal plates 57 set back from the metal plates 56 in the direction of rotation of the drum represent safety contacts and lie on the largest diameter.

A metal plate 58 arranged on the mean diameter between the four contacts 56, 57 forms a contact to limit the pendulum drum 12 in its emptying position.

The control device 59 shows two initiators 60, 61 arranged at a distance from one another, the initiator 60 lying on the diameter of the metal plate 56 and the initiator 61 on the diameter of the contacts 57.
These initiators 60,61 form electrical stray fields, so that

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when they are covered by one of the contacts 56 »57, the motor 44 is switched off to rotate the drum and reversed or switched off in an emergency.

If the metal plate 56 coincides with the initiator 6o, the drum pivoting is ended and the motor 44 becomes the opposite Drum rotation switched. If the initiator 6o fails or one of these metal plates 56 overflows If the initiator 6o is defective, the metal plate 57 will coincide after a slight further rotation of the drum 12 with the initiator 6l as security and the drum rotation is "interrupted. |

To empty the drum 12, it is rotated until the exciter plate 58 lies between the two contacts 6o, 6l and stops the engine.

The pendulum drum 12 is divided into two or more chambers by one or more partition walls 62. The partitions 62 are releasable (removable) in the drum 12 in terms of position set and can be pushed continuously in the longitudinal direction of the drum into the desired position and by fastening means, such as Screws, clamping parts, brackets or the like. be fixed.

With the partition walls 62 removed, long workpieces can be electroplated in accordance with the drum length. The J Slidable partitions 62 allow the formation of K-ammern in any dimensions.

The partition walls 62 have the advantage that goods of the most varied types are treated separately in the drum 12

The electroplating device according to the invention is in an electroplating plant Can be used with several stations arranged one behind the other.

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Claims (1)

Claims / 1.) Electroplating device with one that is to be electroplated Well-receiving, mounted in a support frame so that it can pivot back and forth, with openings on the shell side for a medium equipped pendulum drum, characterized in that the pendulum drum in cross section has several wall parts connected to one another to form a heart shape that leaves a filling and emptying opening free and adjacent wall parts each at a common, at the same time a bearing point for one with one Part of its cross-section enclosing it and forming a contact web connected to a power supply Reinforcement profile welded on as well as the wall parts and the reinforcement profiles on the front side of the drum closing end walls are attached by welding. Electroplating device according to Claim 1, characterized in that that the pendulum drum (12) consists of two partially circular in cross section and two in cross section an arcuate wall part (15, 16) that is adjacent to it and a straight partial area are formed and the two partially circular ring-shaped wall parts (15) the bottom area of the drum (12) and the two other wall parts (16) form the side region, the straight wall part regions of the Wall parts (16) limit the filling and emptying opening (14). 3. Electroplating device according to claim 1 and 2, characterized in that that the reinforcement profiles (19) of extruded profiles with recesses (21,17) to the connection side Recording of the wall parts welded to them (15, 16) as well as for mounting the contact web (18) are formed. - 15 209836/0959 4. Electroplating device according to claims 1 to 3, characterized in that each reinforcement profile (19) a preferably part-circular bearing recess adapted to the contact web cross-section over its entire length (17) for the contact web (18), which preferably shows a circular cross-section, and two on both sides of this Recess (17) provided notches (steps) as recesses (21) for the wall parts (15, 16). 5. Electroplating device according to claims 1 to 4, characterized in that the preferably a circular Cross-section showing reinforcement profiles (19) with their two front ends in recesses (22) of the Border the drum end walls (2ο). 6. Electroplating device according to claims 1 to 5, characterized in that the wall parts (15 »16) of the drum (12) on the inside by ribs (23) and in the area of the filling and emptying opening (14) on the outside Web (24) are stiffened. Electroplating device according to claims 1 to 6, characterized in that the wall parts (15, 16), the Reinforcement profiles (19), the end walls (2o) and the Stiffening means (23,24) made of plastic, preferably polypropylene, formed and the wall parts (15,16) are deformed in their cross-sectional shape by hot bending. 8. Electroplating device according to claims 1 to 7, characterized characterized in that the four wall parts (15, 16) forming the drum cross-sectional shape over the entire Drum length are each formed in one piece. - 16 209836/0959 21065U Electroplating device according to claims 1 to 8, characterized in that each extends over the entire Drum length extending contact web (18) of two Coaxially arranged in a common bearing recess (17), in the central longitudinal drum area by a Bridge (25) is formed from non-conductive material, such as plastic, interconnected cathode rods. Io.Galvanisiervorrichtung according to claims 1 to 9, characterized characterized in that the two cathode rods each lying in a common reinforcement profile (19) (18) a frontal one covered by the bridge (25) Have pins (18a) and the bridge (25) by means of a threaded bolt reaching through the reinforcement profile (19) (26) and a nut (27) or the like screwed onto it outside the drum (12). fixed in terms of location, solvable is held in the Trornmel (12). 11. Electroplating device according to claims 1 to Io, thereby characterized in that each cathode rod (18) with its end facing away from the bridge (25) through the drum end wall (2o) in a sealed manner and detachable with one on the drum front wall (2o) on the outside attached, a connector (3o) for an electrical power supply line (31) having contact part (32) Is connected in a contact-locking manner, the contact part (32) except for contact points for the cathode rods (18) and the Power line (3D is encased on all sides by an insulation layer (28). 12. Electroplating device according to claims 1 to 11, characterized characterized in that the contact part (32) of a metal core (metal plate) (29) with provided thereon - 17 209836/0959 Metal connector (3o) and one of this core (29) and the connection piece (3o) is formed with an insulating layer (28) encasing all sides, preferably made of rubber, 13. Electroplating device according to claims 1 to 12, characterized characterized in that the cathode rods (18) with a threaded bolt (33) with contact closure in the area of the metal core (29) grasp the contact part (32) and screw it onto this threaded bolt (33), covered by an insulation cap (34) Mother (35) or the like. are releasably connected to the contact part (32). 14. Electroplating device according to claims 1 to 13, characterized in that the contact part (32) provided on the outside of each drum end wall (2o) is partially annular is arranged around the drum axis of rotation (13) and is lined by means of the insulation layer (28) Bores of screwed through screws (36) with nuts (37) on the drum front wall (2o) is detachably fixed. 15. Electroplating device according to claims 1 to 14, characterized in that the connecting piece (3o) of the Contact part (32) is provided in an end region of the partial circular ring and a contact pin in a bore (38) (39) the moisture-insulated electrical line (31) receives a contact fit, this contact pin (39) by a screwed on, covered by an insulation cap (4o) nut (4l) or the like. detachable with the connector (3o) is connected. - 18 - 209836/0959 16. Galvanizing device according to claims 1 to 15, characterized characterized in that the pendulum drum (12) with their two front bearing journals (13) forming the drum pivot axis are pivotably mounted in a support frame (Io) and with a drive gear (43) provided at one end via an intermediate gear (46) with a Drive pinion (45) of a drive device (44) mounted on the support frame (Io), preferably a geared motor, connected is. 17.Galvanisiervorrichtung according to claims 1 to 16, characterized in that the cathode bars (18) of the pendular drum (12) to a power line (31) _a a power supply rail (52) and the enclosing in the receptacles (49) bearing journal (48) a low-voltage source with high amperage and low voltage connected to the receptacles (49) by electrical lines (63) can be connected and the drive device (44) is separately connected via an electrical line (64) to a contact device (53) arranged on the frame (Io) which, in the inserted state of the drum (12) in a treatment container (5o), can be connected to a mating contact device (54) of the container (5o) with a three-phase current supply. 18, electroplating device according to claims 1 to 17 » characterized in that around a bearing journal (13) of the pendulum drum (12), preferably the one opposite the drum drive side, a switching disk (55) made of plastic with several exciter plates, preferably metal plates (56 57,58) and a device, such as a treatment bath container, which is suspended from a drum (12) with a support frame (Io) - 19 - 209836/0959 (5ο), pull and discharge device, transport device (51) or the like. arranged with the metal plates (56,57) (58) contactlessly cooperating control device (59) has two contact switches (initiators 6o, 6l), of which one (6o) when covered by a metal plate (56) of the switching disk (55) the pivoting movement of the Drum (12) limited and reversed in the respective pivoting direction and the other as a safety initiator for the same pivoting movement limitation in cooperation with a second, opposite to the first metal plate (56) Metal plate (57) arranged offset in the direction of rotation of the drum is provided and another on the switching disk | (55) arranged metal plate (58) in its position between the two initiators (6o, 6l) the drum emptying position certainly. 19. Electroplating device according to claims 1 to 18, characterized characterized that on the switching disc (55) five metal plates (56,57,58) as excitation contacts on three different diameters are arranged, of which the two limit the drum pivoting movement Metal plate (56) on the smallest diameter arranged approximately opposite one another, and the two with the Safety initiator (61) cooperating, set back in relation to the exciter contacts (56) in the direction of rotation of the drum Metal plates (57) are also arranged approximately opposite one another on the largest diameter and the emptying position of the drum (12) determining the metal plate (58) between the two inner and the two outer metal plates (56,57) is arranged on a mean diameter. 2o.Galvanizing device according to claims 1 to 19, characterized characterized in that in the pendulum drum (12) a - 2o 209836/0959 - 2ο - or several partition walls (62) continuously displaceable, in terms of position can be fixed and removed, the two or more, adjustable in size and against each other form separate chambers. 209836/0959