RU2643535C1 - Method of mixing the working media in electroplating chamber for parts processing - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to the field of electroplating and can be used to mix the treatment media of electroplating chambers as compressed air, and directly by the processing medium itself, in particular, when processing parts or printed circuit boards placed on pendants. Method comprises mixing the treating medium using a set of semi-cylindrical profiles with the mixing mechanism connected to the outlet of the pressure system in the form of perforated tubes with double-row perforation in their lower part, which are placed along the junction of semi-cylindrical profiles with each other, and controlling the flow rate of the treatment medium of chamber or compressed air using actuators, the set of semi-cylindrical profiles with a stirring mechanism is made in the form of a monoblock detachably mounted on the bottom of the chamber, the detachable installation on the bottom of the monoblock chamber is made with clips mounted on the horizontal part of the side of the chamber and / or corners rigidly connected to the lining or material of the walls of the chamber, and in the case of feeding to the stirring mechanism of the treatment media of the chamber, a suction device placed in the last intake element connected to the inlet of the pressure system is used.

EFFECT: reduction of material consumption, simplification of implementation and provision of the possibility of replacing a set of semi-cylindrical profiles and mixing mechanism, broadening of functional and manufacturing capability of the method.

5 cl, 5 dwg

Description

The invention relates to the field of electroplating and can be used to mix the processing environment of electroplating baths both with compressed air and directly with the processing medium itself, in particular, when processing parts or printed circuit boards placed on suspensions.

A known method of mixing the processing medium of galvanic baths with compressed air, comprising installing perforated tubes connected to the generator’s base to the compressed air generator through the riser and pipe fittings [1].

The disadvantage of this method is the difficulty or inability to create a homogeneous environment throughout the working volume of the galvanic bath.

Another disadvantage of this method is its relatively limited functionality, which does not allow mixing of the processing medium of the baths, in particular solutions of chemical and / or electrochemical degreasing, due to the increased foaming in them when using compressed air.

Also known are methods for hydraulically mixing the processing medium of electroplating baths [2], including, in particular, for SERFTLCO equipment (USA), the use of perforated tubes equipped with nozzles of ejectors connected through risers and pipe fittings to the outlet of the local pressure system, the input of which is connected to placed in the bath intake pipe [3].

The disadvantages of the known methods and / or devices that implement them are:

- uneven intensity of mixing of the processing medium of the bath, due, in particular, to the use of single nozzles of ejectors located at a distance from each other, forming strictly directed flows of the processing medium of the galvanic bath, which, by the way, can also lead to the fall of parts from the suspension to the bottom of the bath;

- relatively high costs for the implementation of the mixing process, in particular, water in the washing baths by immersion method in comparison with its mixing with compressed air, which, moreover, limits the functionality of these methods for implementing mixing devices;

- a relatively greater likelihood of residual contamination in the bath due to the placement at one point of the bath and the design of the intake element, made in the form of a pipe.

профиля, перемешивающий механизм, выполненный в виде размещенных вдоль мест сочленения полуцилиндрических профилей между собой и полуцилиндрических профилей соответствующих частей боковых стенок внутреннего корпуса и выполненных с двухрядной перфорацией в нижней части, перфорированных трубок с соплами, соединенных с помощью трубопроводов с выходом напорной системы, кольцевой заборный элемент с выходным патрубком, соединенным со входом напорной системы, приспособление для размещения деталей, исполнительные механизмы для регулирования расхода, дополнительный механизм перемешивания и забора электролита, причем внутренний и внешний корпусы ванны оснащены или выполнены с элементами их сочленения в виде уголковых профилей, расположенных в верхней части боковых стенок корпусов, внутренний корпус ванны оснащен элементами его транспортировки, а соединение трубопроводов, по крайней мере, между внутренним и внешним корпусами ванны осуществляется через соответствующие разъемные элементы [4].The closest to the proposed technical essence and the achieved result known solution, selected as a prototype, is a method of mixing the electrolyte in a galvanic bath containing an external and internal body, the bottom of the last of which includes a set of semi-cylindrical profiles, and each of its side walls is made in the form whole sheet

a profile, a mixing mechanism made in the form of semi-cylindrical profiles placed along the joints between each other and half-cylindrical profiles of the corresponding parts of the side walls of the inner case and made with double-row perforation in the lower part, perforated tubes with nozzles connected via pipelines to the outlet of the pressure system, an annular intake an element with an outlet pipe connected to the inlet of the pressure system, a device for placing parts, actuators for adjusting consumption, an additional mechanism of mixing and sampling of the electrolyte, the inner and outer shells of the bathtub equipped with or made with elements of their articulation in the form of corner profiles located in the upper part of the side walls of the shells, the inner shell of the bathtub is equipped with elements of its transportation, and the connection of pipelines, at least at least, between the inner and outer shells of the bath is carried out through the corresponding detachable elements [4].

The disadvantages of the known method selected as a prototype are:

- increased material consumption due to the need to manufacture two bathtubs;

- the complexity of manufacturing the bottom of the inner body of the bath;

- limited functional and technological capabilities that prevent or make it difficult to use in the construction of standard galvanic baths, as well as in the implementation of the process of mixing the processing medium with compressed air;

- the difficulty of replacing the mixing mechanism, etc.

The technical result consists in reducing material consumption, simplifying the implementation and providing the possibility of replacing a set of semi-cylindrical profiles and a mixing mechanism, as well as in expanding the functional and technological capabilities of the method.

The technical result is achieved by the fact that in the known method of mixing, including the use of the intake element and a set of semi-cylindrical profiles with a mixing mechanism connected to the outlet of the pressure system, made in the form of perforated tubes placed along the joints of the semi-cylindrical profiles between themselves and made with double-row perforation in their lower parts, a device for placing parts and actuators for regulating the flow, according to the invention, a set of half cylinders In this case, the profiles with a mixing mechanism are implemented as a monoblock detachably mounted on the bottom of the bathtub; in this case, depending on the type of processing medium and / or the purpose of the bath, either compressed air without using an intake element or the processing medium itself using an intake element is supplied, respectively.

A detachable installation at the bottom of the bathtub of the monoblock is made using fasteners-clips installed on the horizontal part of the side of the bathtub and / or corners, rigidly connected to the lining or material of the walls of the bathtub.

выбирают из соотношения:And the length of the monoblock is chosen to be greater than or equal to the length of the suspension used to place parts, and the size of the width of the monoblock

choose from the ratio:

,

,

- максимальная ширина обрабатываемых на подвеске деталей в плане;

- maximum width of parts processed on the suspension in plan;

- ширина ванны промывки погружным способом.

- the width of the wash bath by immersion.

профиля, расположенными над местами перфорации.At the same time, at least when the processing medium is fed into the mixing mechanism, the perforation of the adjacent adjacent tubes is staggered in the form of trapezoidal holes with the extension directed away from the center of the perforated tube, and the perforated tubes themselves are equipped with guides

profile located above the perforation.

As the intake element, intake nozzles or an annular intake element with an outlet pipe are used, which are installed in clip fasteners placed respectively on the horizontal part of the side of the bath and corners rigidly connected to the lining or material of the bath walls.

And as a pressure system, depending on the type of processing medium and / or purpose of the bath, use either an oil-free blower or an electric pump unit.

A comparative analysis of the proposed solutions with the prototype shows that the proposed method allows to provide:

- no need to manufacture two bathtubs;

- the absence of the need to manufacture the bottom of the inner tub body and the ability to use the shells of standard bathtubs;

- extended functional and technological capabilities that allow its use in the construction of standard galvanic baths, as well as in the implementation of the process of mixing the processing medium with compressed air;

- the possibility of using cases of standard bathtubs;

- ease of replacement of the mixing mechanism and the intake element.

Comparison of the claimed solution not only with the prototype, but also with other technical solutions in other technical fields showed that there is a known method for implementing a mixing device in a plating bath containing an external and internal body, the bottom of the last of which includes a set of semi-cylindrical profiles, a mixing mechanism made in in the form of perforated tubes with nozzles, a pressure system, an annular intake element and a device for accommodating parts, the perforated tubes being installed with possible Stu axial movement and connected via a seal on the annular element intaking [5].

The disadvantages of the known method selected as a prototype are:

- increased material consumption in the manufacture of double shell baths;

- the complexity of manufacturing the bottom of the inner body of the bath;

- limited functional and technological capabilities that prevent or make it difficult to use in the construction of standard galvanic baths, as well as in the implementation of the process of mixing the processing medium with compressed air;

- complexity, up to the impossibility of replacing the mixing mechanism, etc.

The invention is illustrated by drawings.

In FIG. 1 shows an embodiment of mixing in a bubble bath, in particular in a bath for washing parts by immersion, equipped with a device for mixing the processing medium manufactured by the present method, side view, section.

In FIG. 2 shows a section aa in FIG. one.

In FIG. 3 shows a section BB in FIG. one.

In FIG. 4 shows a variant of mixing in a bath with non-bubble stirring using a device for mixing the electrolyte / solution manufactured by the inventive method with the bath processing medium itself using an annular (in this case) intake element, side view, section.

In FIG. 5 shows a section bb in FIG. four.

The bubble bath (Fig. 1-3) contains a housing 1 with a lining (not shown in Fig. 1-3), made in the form of a detachable, using fasteners-clips 2 (in this case), mounted on the horizontal part of the side (on Fig. 1 is not indicated) of the bathtub body 1, and / or clips 3, 4 mounted on the corners (in this case) 5 and 6, respectively mounted on the bottom of the bathtub body 1 of the monoblock, which are rigidly connected to the lining or material of the walls of the bathtub body 1 including a set of semi-cylindrical profiles 7, and connected by a pipe with installed on a detachable sleeve (not shown in FIG. 1) with the output of a compressed air generator (not shown in FIG. 1), a mixing mechanism made in the form of perforated tubes 8 placed along the joints of the semi-cylindrical profiles 7 together and made with double-row perforation (on Fig. 3 is not indicated) in their lower part, a suspension for placement of parts and an actuator for regulating the flow of compressed (in this case) air (in Fig. 1 are not shown).

профиля, расположенными над местами перфорации. Длину моноблока выбирают большей или равной длине подвески, используемой для размещения деталей, а величину ширины моноблока

выбирают из соотношения:In this case, the perforated tubes 8 are equipped with guides 9

profile located above the perforation. The length of the monoblock is chosen greater than or equal to the length of the suspension used to place parts, and the width of the monoblock

choose from the ratio:

- максимальная ширина обрабатываемых на подвеске деталей в плане;

- maximum width of parts processed on the suspension in plan;

- ширина ванны промывки деталей погружением.

- the width of the bath rinsing parts by immersion.

профиля, расположенными над местами перфорации и размещенных вдоль мест сочленения полуцилиндрических профилей 7 между собой и выполненных с двухрядной перфорацией (на фиг. 4, 5 не показана, а на фиг. 3 не обозначена), реализованной в шахматном порядке в виде отверстий трапецеидальной формы, с расширением направленным в сторону от центра перфорированной трубки в их нижней части (на фиг. 3 не обозначена и показана условно), выполненный в виде разъемно, с помощью креплений-клипс 10 (в данном случае), закрепленных на горизонтальной части борта (на фиг. 1 не обозначен) корпуса 1 ванны, и/или креплений-клипс 11, установленных на жестко соединенных с футеровкой или материалом стенок корпуса 1 ванны уголках (в данном случае) 12, и расположенный ниже уровня электролита/раствора в ванне кольцевой (в данном случае) заборный элемент 13, оснащенный перфорацией (на фиг. 4 не обозначена) и соединенный трубопроводом 14 с установленной на нем разъемной муфтой (на фиг. 4 не обозначена), со входом напорной системы, подвеску для размещения деталей и исполнительные механизмы для регулирования расхода электролита/раствора (в данном случае) (на фиг. 1 не показаны).The bath while mixing the electrolyte / solution with the processing medium itself (Fig. 4-5) contains a housing 1 with a lining (not shown in Fig. 4, 5), made in the form of a detachable, using fasteners-clips 2 (in this case), fixed on the horizontal part of the bead (not indicated in FIG. 1) of the bathtub body 1, and clips 3, 4 mounted on the corners (in this case) 5 and 6, respectively, which are mounted closer to the lining or material of the walls of the bathtub body 1 the bottom (in this case) of the body 1 of the monoblock bath, including a set of half indricheskih profiles 7 and is connected with a conduit mounted thereon releasable coupling (FIG. 1 are not labeled) in a yield pressure system (Fig. 4, 5 are not shown), a stirring mechanism is configured in the form of perforated tubes 8, 9 equipped with the guide

profiles located above the perforation places and placed along the joints of the semi-cylindrical profiles 7 with each other and made with double-row perforation (not shown in Fig. 4, 5, and not shown in Fig. 3), staggered in the form of trapezoidal holes, with the extension directed away from the center of the perforated tube in their lower part (not shown in FIG. 3 and shown conditionally), made in the form of a detachable, using fasteners-clips 10 (in this case), mounted on the horizontal part of the side (on d.1 is not indicated) of the body 1 of the bath, and / or the clips 11 mounted on corners (in this case) 12, rigidly connected to the lining or material of the walls of the body 1 of the bath, 12, and located below the level of the electrolyte / solution in the annular bath (in in this case) the intake element 13, equipped with perforation (not shown in FIG. 4) and connected by a pipe 14 with a detachable sleeve installed on it (not shown in FIG. 4), with the inlet of the pressure system, a suspension for accommodating parts and actuators for regulation electrolyte consumption a / solution (in this case) (in FIG. 1 are not shown).

Installation of mixing devices according to the proposed method is as follows.

Initially, depending on the type and / or design features of the bathtub, in particular, by welding, for example, polypropylene or gluing, in particular polyvinyl chloride, one-piece connection of previously made, for example, of the above materials, corners 5, 6 and 12, respectively, is performed.

Further, depending on the location of the pipelines (not shown in Fig. 2, 4) connecting the perforated tubes 8 of the monoblock and the corresponding sections of the annular intake element 13, a detachable or one-piece installation is made at the corners 5, 6 and 12 of the clip fasteners 3, 4 and 11 respectively.

Moreover, the location of the clips 4 depending on the location of the corners 6 (in this case) can be parallel to the bottom of the bath body 1 (see Fig. 2), and at an angle to it (see Fig. 4, 5).

After that, the monoblock is directly installed in the clip fasteners 3, 4, depending on the type of bath (with bubbling or with the latter being mixed with the processing medium itself), the inlet piping of the monoblock either to the compressed air generator (Fig. 1, 2) or to the pressure head system for supplying electrolyte / solution (Fig. 4, 5).

In this case, in the latter case, after installation of the monoblock in the bathtub, the annular intake element 13 (in this case), the outlet pipe 14 of which is connected through a detachable sleeve (not shown in Fig. 4), to the inlet of the pressure system is installed in the fastening clips 11 used to supply the electrolyte / solution to the monoblock bath.

After filling the bath with either water or an appropriate electrolyte / solution that does not allow the use of compressed air, and, for example, loading the device with parts, respectively, produce:

- turning on the compressed air generator or connecting it to a centralized line, through, for example, an electromagnetic valve, while the intensity of mixing by sparging is controlled by the corresponding actuator to control the flow of compressed air, and the compressed air enters the perforated tubes 8, through the perforation of which it exits under pressure between the guides 9 (in this case) and the inner surfaces of the half-cylinders 7;

- inclusion of the pressure system (pump), thereby ensuring the suction of the electrolyte / bath solution through the perforation of the element 13 and through the pipe 14 (in this embodiment), the flow of electrolyte / bath solution to the inlet of the pressure system (pump), from the output of which (w) through an actuator for controlling the flow rate through the pipeline (not indicated in Fig. 4, 5) the electrolyte / solution enters the perforated tubes 8, through the perforation of which it exits under pressure between the guides 9 (in this case) and the internal surfaces half cylinders 7, which in both cases facilitates exclusion formation of "stagnant" areas and uniform over the entire area, an upwardly directed, stable flow of compressed air and electrolyte / solution bath, respectively.

In order to create even more uniform flows of mixing media and the removed electrolyte / bath solution, respectively:

- the monoblock can be equipped with a second supply pipe, located opposite to the first;

- the annular intake element can also be equipped with at least a second pipe connected to the pump inlet, located opposite to the first.

In case of difficulties in this implementation and one-sided supply and intake of the bath processing medium, a gradual increase in the perforation area (from 1 to 1.5 times) from the place of supply of the processing medium or from the place of the latter’s intake can be used.

In addition, in order to further expand the functional and technological capabilities of the proposed method in terms of intensifying processing and improving the quality of processing of parts and / or coatings applied to them, the pipeline connecting the outlet of the pressure system for supplying electrolyte / solution to the inlet of the mixing mechanism can also be connected and with a U-shaped collector installed in the upper part of the bath, each of the branches of which is connected to vertical tubes equipped with perforations, used to create and horizontal, directed toward the side surfaces of the parts of the electrolyte / solution flows, thereby providing a hydrodynamic component in the process of processing parts and / or coating on them, which is especially important, given the purpose of this original application, and a modification of the solution known in this part [6 ].

Moreover, in the case of using a mixing device implemented in the proposed method in an electrochemical treatment bath (chromium plating, nickel plating, galvanizing, etc.), the branches of the U-shaped collector with vertical perforated tubes connected to them are placed behind the annular intake element, in front of the conductive rod with vertical bars made in the form plates with electrodes that supply electric current from a power source to the electrolyte of a galvanic bath.

In this case, either a two-way supply of electrolyte / solution to the vertical perforated tubes or perforation in them can also be carried out with an increase in the area of holes from 1 to 1.5 times from the point of supply of the processing medium.

If it is necessary to replace a monoblock or an annular intake element, the processing medium is drained through a drain hole with a normally closed actuator or by means of a submersible pump installed or installed in the bathtub for the duration of the drain.

Then, the corresponding parts of the detachable couplings are disconnected and the pipes of the annular intake element and / or monoblock are disconnected from the clips together with the corresponding sections of the output and input pipelines.

Thus, the proposed method in comparison with the known, selected as a prototype, allows you to:

- significantly reduce the material consumption of the bath, equipped with a mixing mechanism, due to the elimination of the need to implement a double-shell design of the bath and the manufacture of a complex bottom of the inner body of the latter;

- simplify the implementation and provide the ability to replace a set of semi-cylindrical profiles and a mixing mechanism due to their manufacture as a plug-in monoblock installed in a standard bathtub;

- to expand the functional and technological capabilities of the method by providing the possibility of mixing the processing medium of the bath and compressed air.

The implementation of the proposed method is quite simple and does not meet fundamental difficulties.

So, an annular intake element, tubes of a mixing mechanism with the necessary perforation, like the monoblock itself, can be manufactured using either standard components from polypropylene or polyvinyl chloride with their subsequent mechanical modification, or the corresponding type of thermoplastic material and equipment (injection molding machine, 3-D printer) .

Information sources

1. UDC [621.357.7: 658.52.011.56.012.3] (035) Flexible automated galvanic lines: Reference. Under the total. Ed. V.L. Zubchenko. - M .: Engineering, 1989, p. 157, tab. 3 and p. 160, fig. 23.

2. UDC [621.357.7: 658.52.011.56.012.3] (035) Flexible automated galvanic lines: Reference. Under the total. Ed. V.L. Zubchenko. - M .: Engineering, 1989, p. 157, tab. 3.

3. Airless ejector mixing systems SERDUCTOR manufactured by SERFILCO. Promotional Materials, 1 pp.

4. RF patent No. 2042743. M.cl. C25D 17/02, 1992 - prototype.

5. Copyright certificate of the USSR No. 831877. M.cl. C25D 17/02, 1979

6. RF patent No. 2042745. M.K. C25D 17/02, 21/10, 1992

Claims (8)

1. The method of mixing the processing medium in a plating bath for processing parts, characterized in that the processing medium is mixed using a set of half-cylinder profiles with a mixing mechanism connected to the outlet of the pressure system in the form of perforated tubes with double-row perforation in their lower part, which are placed along the joints semi-cylindrical profiles between each other, and regulate the flow rate of the processing medium of the bath or compressed air using actuators, etc. this set of semi-cylindrical profiles with a mixing mechanism is performed in the form of a monoblock detachably mounted on the bottom of the bathtub, and the monoblock detachable installation on the bathtub bottom is made using fasteners-clips installed on the horizontal part of the side of the bath and / or corners rigidly connected to the lining or material of the bath and when the bath is fed into the mixing mechanism of the processing medium, the intake element located in the last connected to the inlet of the pressure system is used. 2. The method according to p. 1, characterized in that the length of the monoblock is chosen to be greater than or equal to the length of the suspension used to place parts, and the width of the monoblock (

) choose from the ratio:

- maximum width of parts processed on the suspension in plan;

- the width of the wash bath by immersion. 3. The method according to p. 1, characterized in that for feeding into the mixing mechanism of the processing medium, the perforation of adjacent adjacent tubes is performed in a checkerboard pattern in the form of trapezoidal holes with an extension directed away from the center of the perforated tube, and the perforated tubes themselves are equipped with guides

profile located above the perforation. 4. The method according to p. 1, characterized in that the intake element is used inlet pipes or an annular intake element with an outlet pipe, which is installed in the fasteners-clips placed respectively on the horizontal part of the side of the bathtub and corners rigidly connected to the lining or material the walls of the bath. 5. The method according to p. 1, characterized in that the pressure system, depending on the type of processing medium and / or purpose of the bath, is used as an oil-free blower or an electric pump unit.

Images