RU2426820C1 - Procedure for jet chemical treatment and cleanup of surface of flat items - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: procedure consists in loading items to bath and in supply of processing medium from local pressurised systems into horizontally set collectors with jet-forming elements facilitating generation of jet flows in form of uninterrupted and stepped zone of treatment with similar hydro-dynamic pressure of jets in flow. The elements perform reciprocal travels relative to treated surfaces. Also, for processes of treatment with time of exposure of parts T ≥ 0.5 min there are performed reciprocal motions of jet flows relative to treated surfaces, while for processes with time of exposure T < 0.5 min - vice versa.

EFFECT: raised efficiency and quality of operations of chemical treatment due to expanded spectre of reciprocal motions; possibility to change exposure and properties of jet flows relative to parts; reduced cycle of parts washing; reduced probability of nozzle orifices clogging.

5 cl, 2 dwg

Description

The invention relates to chemical processing by a jet method of surfaces placed on suspensions of parts of mechanical engineering and instrumentation and is applicable in galvanic production, the manufacture of printed circuit boards and other industries using this processing method.

A known method of chemical treatment of surfaces placed on suspensions of parts, including blasting with a chemical solution in the first bath, jet washing with water and washing by immersion in the second bath / 1 /.

The disadvantages of this method are the limited types and relatively low reliability of the blasting processes, due to the high probability of incomplete and / or uneven processing, as well as clogging of the nozzle holes of the elements of the formation of the jets with a chemical treatment solution, or its residues after the end of the chemical treatment process.

Another disadvantage of this method is the relatively large amount of chemical treatment solution carried out by the parts from the process bath.

In terms of technical nature, the closest known solution selected as a prototype is a method of chemical jet treatment and surface cleaning of parts, including loading the latter into a bath, supplying a processing medium (solutions of degreasing, etching, activation and / or washing water) from local pressure systems, collectors connected to the tanks of the respective processing media, to horizontally located at least on two sides of the bath, collectors with jet-forming elements providing jet stream and made with the possibility of reciprocating movement relative to the machined surfaces using the appropriate Executive bodies and mechanisms / 2 /.

One of the disadvantages of the known method, selected as a prototype, in addition to those already noted above, is that it does not take into account the duration and features of the chemical processing operations involved, including jet dynamic washing, which, in turn, does not allow for rational costs time and energy.

The technical result in the proposed method consists in increasing the efficiency and quality of chemical processing operations due to the expanded spectrum of reciprocating movements, in the possibility of changing the exposure and properties of jet streams relative to products (or parts), in reducing the washing cycle of products, in reducing the likelihood of clogging of nozzle openings .

возвратно-поступательном перемещении струйных потоков относительно обрабатываемых поверхностей, в зависимости от высоты зоны струйной обработки, выбирают из соотношения:

. В качестве исполнительных органов и механизмов используют бесконечные цепи, в том числе зубчатые ремни, перемещающиеся по установленным вертикальным блокам, выполненным в виде зубчатых колес, соединенных посредством валов, по крайней мере один из выходов которого соединен с соответствующим электроприводом, при этом цепи жестко соединены с направляющей, на которой установлены коллекторы со струеформирующими элементами, выполненными с возможностью поворота вокруг продольной оси коллектора.This is achieved by the fact that in the method selected as a prototype, which includes loading flat products into a bath, supplying a processing medium — solutions of degreasing, etching, activation and / or washing water, from tanks using local pressure systems to horizontally located collectors with jet-forming elements providing the formation of jet streams and having the possibility of reciprocating movement relative to the machined surfaces of the products using the appropriate executive body and mechanisms in accordance with the invention, the chemical treatment process with the time of exposure of products carried ≥0,5 min reciprocable relative jet streams of the processed surfaces, and processes for washing articles with a time exposure <0.5 m - vice versa; carry out reciprocating movement of the treated surfaces relative to the jet streams. Moreover, each of the jet streams is formed in the form of a continuous and stepwise treatment zone with the same hydrodynamic pressure of the jets in the stream, formed in the form of "packets" of parallel jets of submillimeter cross-section, spaced at least for the processes of jet-dynamic chemical processing that provides the smallest the amount of aeration of the jets of the processing medium. Moreover, the jet-dynamic processing of products during the reciprocating movement of the jet streams relative to these products starts from the top of the machined surfaces. At the same time, after at least jet-dynamic chemical processing of the products is completed, in the process of product unloading, they are cleaned of the residues of the corresponding solution by supplying washing water to their surface, including contaminated with the main washable component, compressed air or inert gas from statically placed collectors with jet forming elements located in the upper part of the bath, and the number of collectors with jet forming elements

reciprocating movement of the jet stream relative to the machined surfaces, depending on the height of the zone of the jet processing, choose from the ratio:

. Infinite chains are used as actuators and mechanisms, including toothed belts moving along mounted vertical blocks made in the form of gear wheels connected by shafts, at least one of the outputs of which is connected to the corresponding electric drive, while the chains are rigidly connected to a guide on which collectors are installed with jet-forming elements made to rotate around the longitudinal axis of the collector.

As flat products, printed circuit boards, plates or sheets placed on suspensions are usually treated.

Moreover, the distance 1, providing the smallest aeration of the jets of the processing medium, at least for the processes of jet-dynamic chemical processing, is determined from the condition:

, где

- выходной диаметр соплового отверстия струеформирующего элемента, мм.

where

- the outlet diameter of the nozzle hole of the jet forming element, mm

выбирают из соотношения:

And the cycle length of the reciprocating - translational movement of the collector

choose from the ratio:

- длительность выгрузки изделий из ванны струйно-динамической химической обработки, с,Where

- the duration of the unloading of products from the bath jet dynamic chemical treatment, s,

- максимальная длительность перемещения изделий из ванны струйно-динамической химической обработки к ванне струйно-динамической промывки, с,

- the maximum duration of the movement of products from the bath of the jet-dynamic chemical treatment to the bath of the jet-dynamic washing, s,

- длительность загрузки изделий в ванну струйно-динамической промывки, с,

- the duration of the loading of products in the bath jet dynamic washing, s,

- инерционность локальной напорной системы, подключенной к баку с водой для проведения операций струйно-динамической промывки изделий в ванне струйно-динамической промывки, с.

- the inertia of the local pressure system connected to the water tank for performing jet-dynamic washing of products in a jet-dynamic washing bath, p.

In addition, after the end of the jet-dynamic chemical treatment processes, the internal surfaces of the collectors and jet-forming elements are cleaned by supplying the water used in the subsequent jet-dynamic washing operation.

Comparative analysis with the prototype shows that the inventive method differs in an expanded spectrum of reciprocating movements, depending on the magnitude of the exposure of the products in the respective bathtubs, the form of the generated jet streams, the duration of the cycle of the reciprocating movement of the collectors and the number of the latter, the execution of the executive bodies and mechanisms of the reciprocal translational movement, etc.

Thus, the claimed method meets the criteria of the invention of "novelty."

Comparison of the claimed solution not only with the prototype, but also with other technical solutions in this field showed that there is a known method of chemical inkjet processing and surface cleaning of parts, including blasting with a chemical solution, blasting and rinsing with water by the submersible method, while blasting and blasting washing is carried out in one bath, and the chemical solution and water are fed through the common elements of the formation of jets, after which the surface of the parts is blown with compressed air by feeding it Res same elements, and the washing method are submerged in a flowing bath / 3 /.

However, this method is characterized by a large volume of wastewater, requires large energy costs associated with the need for blasting the entire surface of parts in a static position and does not allow for a rational regime of galvanochemical treatment of parts in general.

This allows us to conclude that the claimed technical solution meets the criterion of "significant differences".

Figure 1 presents the structural diagram of the installation that implements the proposed method for the basic operations of any process of galvanochemical processing - degreasing and etching.

Figure 2 presents a diagram of a device for reciprocating movement of jet streams relative to the treated surface.

An installation that implements the proposed method for the basic operations of any process of galvanochemical processing — degreasing and etching, contains the following technological sequence: baths 1 and 2 for jet-dynamic degreasing and etching, respectively, each of which is equipped with rod catchers with a suspension (in FIG. .1 not indicated) with parts of 3 types of plates, a drain channel 4 with three-way valves of manual 5 and automatic 6 (in this case) execution installed on it, respectively but, by the device of the reciprocating movement of the jet streams relative to the machined surfaces, made (in this case) in the form of endless chains (toothed belts) 7, 8, moving along established vertical blocks made in the form of gears 9, 10 connected by shafts ( 1 are not indicated), with corresponding electric drives 11, 12, while the circuits are rigidly connected to the guides (not shown in FIGS. 1, 2), on which collectors 13, 14 are installed with stream forming elements 15 made with the rotation, using, for example, a detachable sleeve (not shown in Fig.1,2), around the longitudinal axis of the corresponding manifold, a bath 16 for jet washing parts on the suspension with hot and cold water, equipped with a drain channel 4 and connected to the inlet of the check valves 17 , 18 for supplying hot and cold water, respectively, with water supply manifolds (not indicated in FIG. 1) with jet forming elements 15 rotatable using, for example, a detachable sleeve (not shown in FIGS. 1, 2) , around the longitudinal axis of the collet Ktorov, and manifolds for supplying compressed air (not indicated in figure 1) from the oil-free blower 19 through the filter element (not indicated in figure 1) to the jet forming elements 15, also made with the possibility of rotation, using, for example, a detachable sleeve ( 1.2 is not shown), around the longitudinal axis of the corresponding collector, a bath 20 for washing parts washed on a suspension with cold water, equipped with a drain channel 4 and collectors for supplying water (not indicated in FIG. 1) with stream forming elements 15 made with opportunity rotation, using, for example, a detachable sleeve (not shown in FIGS. 1, 2) around the longitudinal axis of the manifolds and manifolds for supplying compressed air (not shown in FIG. 1) from the oil-free blower 21 through the filter element (in FIG. .1 not indicated) in the jet-forming elements 15, also made with the possibility of rotation, using, for example, a detachable sleeve (not shown in Fig. 1.2), around the longitudinal axis of the corresponding manifold, while the bath 2 is also equipped with manifolds for supplying compressed air (not indicated in figure 1) from oil-free air blower 22 through the filter element (not indicated in FIG. 1) into the jet forming elements 15, also made with the possibility of rotation, for example, using a detachable sleeve (not shown in FIG. 1.2), around the longitudinal axis of the corresponding manifold, and the installation itself is equipped with at least two sections, collecting traps 23, 27, 32 and 38 of the corresponding processing medium.

The collection-trap 23 of the chemical treatment solution (degreasing, in this case) is equipped with a heating element located in the first section (not indicated in Fig. 1), a pump 24 for supplying a degreasing solution through a filter element, a control valve (not indicated in Fig. 1 ), a three-way solenoid (in this case) valve 25, supply pipelines, pipes and corrugated hoses (not shown in Fig. 1) to the manifolds 13, 14 with the jet forming elements 15 of the bath 1, and connected through the shutoff valve of the second section (on figure 1 is not We denote) installing the filter 26, whose output is connected to the first section 23 of the collection-catcher.

The outputs of the bathtub 1 mounted on the drain pipe 4 of the three-way valve 5 are connected to the first and second section of the collector-catcher 23.

The collection catcher 27 of the wash water (hot and cold, in this case) is equipped with:

- located in the first section of the heating element (figure 1 is not indicated);

- a pump 28 for supplying hot water, the outlet of which is connected through a filter element (not indicated in FIG. 1), a three-way solenoid (in this case) valve 29 and control valves (not indicated in FIG. 1), with a three-way solenoid valve 25 and collectors for supplying hot water (not indicated in FIG. 1) with stream forming elements 15 in the bath 1;

- located in the first section of the pump 30 for supplying hot water, through a non-return valve 17, into the collectors for water supply (not indicated in figure 1) with jet-forming elements 15 in the bath 16;

- connected, through a shutoff valve of the second section, equipped with a float level controller (not shown in FIG. 1), a pump 31, the output of which, through a control valve (not indicated in FIG. 1) and a check valve 18, is connected to the collectors for supplying water ( figure 1 are not indicated) with jet-forming elements 15 in the bath 16.

The collector-catcher 32 of the etching solution, in this case, is equipped with a pump 33 for supplying the etching solution located in the first section, through a filter element, a control valve (not indicated in Fig. 1), a three-way solenoid (in this case) valve 34, supply pipelines , pipes and corrugated hoses (not shown in FIG. 1) to the manifolds 13, 14 with the jet forming elements 15 of the bath 2, and connected, through a shut-off valve of the second section (not indicated in FIG. 1), to a filter unit 35, whose outlet is connected, through flowing or submersible (indicated by a dotted line) selective electrolyzer (electrochemical module) 36 with the first section of the collector-collector 32.

In this case, the second output of the automatic three-way valve 6 installed on the drain pipe 4 of the bath 2 is connected to the first section of the collector-trap 27, and the first output of the automatic three-way valve 6 is connected to the input of the manual (in this case) three-way valve 37, the first output of which is connected to the first section of the collector-trap 32, and its second output is connected to the second section of the collector-trap 32.

The collection catcher 38 of the washing water (cold, in this case) is equipped with:

- a pump 39 for supplying cold water, the output of which is connected through a filter element and a control valve (not indicated in FIG. 1), with the corresponding output of a three-way solenoid (in this case) valve 34;

- connected, through a shutoff valve of the second section, equipped with a float level controller (not shown in FIG. 1), a pump 40, the output of which, through a control valve (not indicated in FIG. 1), is connected to the collectors for water supply (not shown in FIG. 1 marked) with stream forming elements 15 in the bath 20.

In the initial state in the baths 1,2, 16, 20 there are no workpieces. The parameters (temperature, level, concentration of the main component, etc.) of the degreasing solution in the collector 23, the etching solution in the collector 32 and the wash water in the collectors 27 and 38 are normal, due to technological requirements.

Automatic three-way solenoid valves 6, 25, 29, 34 are normally open in the 1-2 direction.

Three-way manual cranes 5, 37 are normally open in the 1-2 direction.

Pumps 24, 28, 30, 33, 31, 33, 39 and 40, as well as oil-free blowers 19,21 and 22 are in the off state.

The actuators 11, 12 baths 1 and 2 are also in the off state. In this case, the jet-forming elements 15 in these baths are at their highest point in the cycle of the reciprocating movement.

Filter units 26 and 35 are also off.

After loading into the bath 1 subjected to jet degreasing parts 3 sequentially automatically or remotely produced (for example, using the appropriate signals from the control unit included in the installation):

- turning on the pump 24;

- inclusion of electric drives 11, 12 bath 1.

In this case, the degreasing solution begins to circulate along the circuit: the collection catcher 23 — pump 24 — open three-way solenoid valve 25 in the direction 1-2, supply pipelines, pipes and corrugated hoses (not indicated in FIG. 1) —collectors 13, 14 — stream forming elements 15 bath 1 - drain channel 4 - open in the direction of 1-2 three-way manual valve 5 execution - collection catcher 23.

, где

- выходной диаметр соплового отверстия струеформирующего элемента.And the jet forming elements 15 themselves begin to move reciprocally relative to the surfaces of the parts 3, thereby supplying oncoming flows formed in the form of “packets” of parallel jets of a submillimeter section with a continuous and stepped processing zone with the same hydrodynamic pressure of the jets in the stream located at a distance ( l), at least for chemical spray blasting processes that provide the least amount of aeration to the processing fluid jets

where

- the outlet diameter of the nozzle hole of the jet forming element.

The jets of the degreasing solution, during the treatment time (≥0.5 min, in this case) enter the surface of the workpieces 3, providing the corresponding effect of this operation.

выбирают из соотношения:The duration of the cycle of the reciprocating movement of the reservoir

choose from the ratio:

,

,

- длительность выгрузки изделий из ванны струйно-динамической химической обработки - 1, в данном случае;Where

- the duration of the unloading of products from the bath jet-dynamic chemical treatment - 1, in this case;

- максимальная длительность перемещения изделий из ванны струйно-динамической химической обработки к ванне струйной промывки - 16;

- the maximum duration of the movement of products from the bath of the jet-dynamic chemical treatment to the jet washing bath is 16;

- длительность загрузки изделий в ванну струйной промывки (ВСП) - 16;

- the duration of the loading of products in the bath jet washing (VSP) - 16;

- инерционность локальной напорной системы - насоса 30, в данном случае, сборника-улавливателя 27, используемого для проведения операций струйно-динамической промывки изделий горячей водой в ванне 16.

- the inertia of the local pressure system - the pump 30, in this case, the collector-trap 27 used for jet-dynamic washing of products with hot water in the bath 16.

This condition is necessary to prevent the negative impact of the chemical treatment solution (in particular, degreasing) on the surface of the parts 3 during their movement to the jet washing bath 20 and coordination of the time cycles of processing of parts in different bathtubs of the processing line.

After the end of the jet degreasing time, previously issued signals at the corresponding outputs of the control unit disappear, which leads to the following:

- the pump 24 of the collection catcher 23 is turned off;

- are switched off (at the moment when the jet-forming elements 15 reach their upper point of the cycle of the reciprocating movement), the actuators 11, 12 of the bath 1.

After that, automatically or remotely, using the appropriate signal from the control unit, the pump 28 of the collector-trap 27 is turned on, which ensures the supply of hot wash water through a normally open in the direction 1 -2 three-way solenoid valve 29 to the statically located in the upper part of the bath 1 collectors with jet forming elements 15.

After hot water jets reach the technologically required head (about 2-3 s.), Parts 3 are automatically or manually unloaded from bath 1, while at the same time cleaning their surface from the remnants of the degreasing solution.

After the unloading time for parts 3 from the bath 1, the previously issued signal at the corresponding output of the control unit disappears, which leads to the shutdown of the pump 28 of the collector-trap 27.

At the same time, 2 processes are implemented simultaneously:

- jet dynamic washing of parts 3;

- complete drainage of the degreasing solution diluted with water, through a three-way valve 5 normally open in the 1-2 direction, into the first (in this case) section of the collector-catcher 23.

And the flow of hot wash water during jet washing can be coordinated, using a control valve, with the amount of evaporation of the degreasing solution in the collector-catcher 23.

After the unloading time for parts 3 from the bath 1, the previously issued signal at the corresponding output of the control unit disappears, which leads to the shutdown of the pump 28 of the collector-trap 27.

Next, the parts 3 enter the bath 16 for conducting operations jet dynamic washing of the surfaces of the parts in the process of unloading from the bath 16.

After loading into the bath 16 the parts 3 subjected to jet washing, sequentially automatically or remotely (using the corresponding signals from the control unit), for the duration of the jet washing, the pump 30 of the 1st section of the collector-collector 27 is turned on for supplying hot water to the collectors.

In this case, the hot wash water begins to circulate along the circuit: collector-trap 27 - pump 30 - check valve 17 - static collectors with streamforming elements 15 - drain channel 4 - collector-trap 27.

After hot water jets reach the technologically required head (about 2-3 s), parts 3 are automatically or manually unloaded from bath 16, while their surface is cleaned of the last residues of degreasing solution.

After the end of the hot jet washing time, the previously issued signal at the corresponding output of the control unit disappears, which leads to the shutdown of the pump 30 of the collector-trap 27.

After that, automatically or remotely (during the unloading of parts 3 from the bath 16), using the appropriate signals from the control unit, the pump 31 is connected, connected to the second section of the collector-trap 27, which ensures the supply of already cold wash water through the check valve 18, collectors with jet-forming elements 15, statically located in the upper part of the bathtub 1, and the inclusion of an oil-free blower 19, thereby ensuring the flushing of washing water from the surface of the parts 3, which may be necessary for more effective implementation of the next operation according to the technological process - jet etching.

After loading into the bath 2 subjected to jet etching parts 3 sequentially automatically or remotely produced (for example, using the appropriate signals from the control unit included in the installation):

- turning on the pump 33;

- the inclusion of electric actuators 11,12 bath 2.

In this case, the etching solution begins to circulate along the circuit: the collection catcher 32 — pump 33 — open three-way solenoid valve 34 in the 1-2 direction, supply pipelines, pipes and corrugated hoses (not indicated in FIG. 1) —collectors 13, 14 — jet-forming elements 15 of the bath 2 - drain channel 4 - open in the direction of 1-2 three-way solenoid valve 6 - open in the direction of 1-2 three-way valve 37 of manual execution - collector 32.

, где

- выходной диаметр соплового отверстия струеформирующего элемента.And the jet forming elements 15 themselves begin to move reciprocally relative to the surfaces of the parts 3, thereby supplying oncoming flows formed in the form of “packets” of parallel jets of a submillimeter section with a continuous and stepped processing zone with the same hydrodynamic pressure of the jets in the stream located at a distance ( l), at least for chemical spray blasting processes that provide the least amount of aeration to the processing fluid jets

where

- the outlet diameter of the nozzle hole of the jet forming element.

The jets of the etching solution during the treatment time arrive on the surface of the workpieces 3, providing the corresponding effect of this operation.

выбирают из соотношения:The duration of the cycle of the reciprocating movement of the reservoir

choose from the ratio:

,

,

- длительность выгрузки изделий из ванны струйно-динамической химической обработки - 2, в данном случае;Where

- the duration of the unloading of products from the bath jet-dynamic chemical treatment - 2, in this case;

- максимальная длительность перемещения изделий из ванны струйно-динамической химической обработки к ванне струйной промывки - 20;

- the maximum duration of the movement of products from the bath of the jet-dynamic chemical treatment to the jet washing bath is 20;

- длительность загрузки изделий в ванну струйной промывки (ВСП) - 20;

- the duration of the loading of products in the bath jet washing (VSP) - 20;

- инерционность локальной напорной системы - насоса 40, в данном случае, сборника-улавливателя 38, используемого для проведения операций струйно-динамической промывки изделий горячей водой в ванне 20.

- the inertia of the local pressure system - pump 40, in this case, the collector-catcher 38, used for jet-dynamic washing of products with hot water in the bath 20.

This condition is necessary to prevent the negative impact of the chemical treatment solution (in particular, etching) on the surface of the parts 3 during their movement to the jet washing bath 20 and coordination of the time cycles of processing of parts in different bathtubs of the processing line.

After the end of the jet etching time, previously issued signals at the corresponding outputs of the control unit disappear, which leads to the following:

- the pump 33 of the collection catcher 32 is turned off;

- are switched off (at the moment when the jet-forming elements 15 reach their upper point of the cycle of the reciprocating movement), the actuators 11, 12 of the bath 2.

After that, automatically or remotely, using the appropriate signal from the control unit, the oil-free blower 22 is turned on for the period of unloading the parts from the bath 2, thereby blowing the etching solution off the surface of the parts 3, which may be necessary for more efficient implementation of the next operation according to the process - jet washing.

Further, the parts 3 enter the bath 20 for jet-dynamic washing of the surfaces of the parts with cold water during their unloading from the bath 20.

After loading 20 parts 3 subjected to jet washing, sequentially automatically or remotely (using the appropriate signals from the control unit) for the duration of the jet washing, the pump 40 of the 2nd section of the collector-catcher 38 is turned on for supplying cold water to the collectors with stream forming elements 15 and the inclusion of an oil-free blower 21, thereby ensuring the flushing of the wash water from the surface of the parts 3, which may be necessary for more efficient implementation of the next operation according to the process - p indoor, for example.

After unloading the parts 3 from the bath 20, they are sent to the next machining operation.

In this case, the replenishment of clean water from its generator (for example, an akvadistillyator) of the second sections of the collectors-traps 27 and 38 occurs automatically, through the float level controls (not indicated in figure 1).

Moreover, in the processing process or after its completion, automatically or remotely (using the appropriate signals from the control unit), sequentially and for a certain time (about 10-15 s) are produced (for bath 1):

- inclusion, for switching in the direction of 1-3, electromagnetic valves 25,29;

- pump 28 of the collection catcher 27.

In this case, hot water enters through the supply pipelines, pipes and corrugated hoses (not indicated in FIG. 1) to the collectors 13, 14 and the jet forming elements 15 of the bath 1 and then through the drain channel 4, through a three-way valve 5 open in the direction 1-2 manual execution - in the collection catcher 23.

Thereby, cleaning of the internal cavities of the supply pipelines, pipes and corrugated hoses, manifolds 13, 14 and stream-forming elements 15 of the bath 1 from the residues of the degreasing solution is achieved.

In addition, if in the process of jet degreasing an increase in the concentration of impurities occurs (for example, in the form of oil), the manual three-way valve 5 is opened in the 1-3 direction, to drain the degreasing solution into the second section of the collector-catcher 23, and the unit 26 is turned on to filter the degreasing solution.

Similarly to the above, this also cleans the internal cavities of the supply pipelines, pipes and corrugated hoses, manifolds 13, 14 and streamforming elements 15 of the bath 2 from the remnants of the etching solution.

For this, during processing or after its completion, automatically or remotely (using the appropriate signals from the control unit), sequentially and for a certain time (about 10-15 s) are performed (for bath 2):

- inclusion, for switching in the direction of 1-3, solenoid valves 34 and 6;

- pump 39 of the collection catcher 38.

In this case, cold water enters through the supply pipelines, pipes and corrugated hoses (not shown in FIG. 1) to the collectors 13, 14 and the jet forming elements 15 of the bath 2 and then through the drain channel 4, through the solenoid valve 6 open in the 1-3 direction , in the first section of the collection catcher 27.

In addition, if during the jet etching process there is an increase in the concentration of impurities (for example, in the form of impurity metal ions), the manual three-way valve 37 is opened in the 1-3 direction to drain the etching solution into the second section of the collector-collector 32, and turn on filter installation 35, whose output is connected through a flowing or submersible (indicated by a dotted line) selective electrolyzer (electrochemical module) 36 with the first section of the collector-collector 32.

Thus, the proposed method of chemical inkjet processing and surface cleaning of flat products, in particular printed circuit boards, plates or sheets placed on suspensions, in comparison with the known, selected as a prototype, allows you to:

- significantly expand the functionality of the ongoing chemical processing and washing operations, by ensuring the relationship between the processes of reciprocating movement of jet streams relative to the machined surfaces or vice versa and the type of processing and / or exposure time of the parts;

- to increase the efficiency and quality of chemical treatment operations, due to the implementation of jet streams in the form of a continuous and stepwise treatment zone with the same hydrodynamic pressure of the jets in the stream, formed in the form of "packets" of parallel jets of submillimeter cross-section, located at a distance, at least for jet processes chemical treatment, providing the smallest aeration value of the jets of the processing medium, the corresponding design of collectors with jet-forming elements and return devices atomic-translational movement of jet streams;

- reduce the likelihood of clogging of the nozzle holes, including due to the implementation of additional cleaning of the processing environment of chemical bathtubs.

A comparison of the proposed method with domestic and foreign analogues indicates the achievement of the new technical result presented in the invention.

The implementation of the proposed method does not meet fundamental difficulties.

So, for example, standard reversible gear motors can be used as electric drives, including those with a supply voltage of 12 (24) V, type IG-90GM with a torque of 115/132 kg · cm and a speed of 34/31 r / min, or type PT 4835.

As jet-forming panels, panels made of thermoplastic materials (in particular, polypropylene) manufactured according to the patent of the Russian Federation No. 2046685 can be used, with the corresponding structure and parameters of nozzle openings.

As a shut-off and control valves, when implementing the proposed method, the nomenclature of the corresponding products (automatic valves, three- and two-way ball valves, check valves, split couplings, pipelines, etc.) manufactured by Aquart and “can be used. Granite ”(Uvarovo, Tambov Region).

As pressure and filter systems, appropriate products (pumps with a magnetic coupling, a selective electrolyzer or a submersible electrochemical module, etc.) manufactured by Siebec (France), Serfilco (USA), and Tecnologie Galvaniche can be used. (Italy) and others.

Teflon electric heaters of the Mazurczak company (Germany) can be used as heating elements.

In addition, to verify the effectiveness of the proposed method, it was also experimentally tested on an auto-line galvanizing line (line code is MGL-423.10.1642.00.000) in the galvanic shop of Electromechanics JSC (Penza), in a collection bath equipped with distribution manifolds with polystyrene streamforming elements.

Chemical treatment (degreasing and etching, immersion and jetting) were subjected to details of the 11th complexity group (in the form of hemispheres) placed on suspensions with dimensions (length × height) 800 × 850 mm.

The total number of parts on the suspension is 12, the total area of the parts is about 0.9 m ² , the number of suspensions is 4.

The time of the submersible chemical treatment was 720 s (for the degreasing operation) and 300 s (for the etching operation).

And the time of jet chemical treatment, with the reciprocating movement of the suspension (using the auto-operator, in this case) relative to the jet-forming elements was about 40 s (both for the degreasing operation and the etching operation).

After completion of the respective washing operations, three parts from each suspension were placed in containers with distilled water for subsequent determination of the quality of processing.

The latter was checked by wiping the surfaces of the parts with filter paper.

The audit showed that the quality of jet-dynamic chemical treatment is at least not inferior to submersible chemical treatment, with a significant reduction in the time of the latter.

INFORMATION SOURCES

1. Dasoyan M.A., Palmskaya I.Ya. Equipment for electrochemical coating workshops. L .: Mechanical engineering, 1979, p.104-108, Fig.3.30.

2. RF patent No. 20133473, M. Cl. C25D 21/12, 1991 - prototype.

3. RF patent No. 2043427, M. Cl. C23F 1/00, C25D 21/08, 1991.

Claims (5)

1. The method of jet-dynamic chemical treatment and cleaning of surfaces of flat products, including loading them into a bath, supplying a processing medium in the form of solutions of degreasing, etching, activation and / or washing water from tanks using local pressure systems in horizontally located collectors with jet-forming elements providing the formation of jet streams and made with the possibility of reciprocating movement relative to the treated surfaces of the products using the appropriate additional organs and mechanisms, characterized in that during processing with an exposure time of products T≥0.5 min, the reciprocating movement of the jet streams relative to the surfaces being machined is performed, and for processes with an exposure time of products T <0.5 min, on the contrary, this, each of the jet streams form a continuous and stepwise treatment zone with the same hydrodynamic pressure of the jets in the stream, formed in the form of "packets" of parallel jets of submillimeter cross section located at and, at least in the case of jet-dynamic chemical treatment, which provides the smallest amount of aeration of the jets of the processing medium, moreover, the jet-dynamic processing of products with the reciprocating movement of the jet streams relative to these products starts from the upper point of the treated surfaces, and at least after jet-dynamic chemical processing of products in the process of unloading products carry out their cleaning from the remnants of the corresponding solution by feeding on top of them awn washing water or washing water contaminated with the main launder component, compressed air or inert gas at the top of the bath is static collector placed with jet forming elements, and the number of reservoirs with a jet forming elements

made with the possibility of reciprocating movement of the jet streams relative to the machined surfaces, depending on the height of the zone of blasting, choose from the ratio:

,
and as actuators and mechanisms use endless chains or toothed belts moving along vertical blocks made in the form of gears connected by shafts, at least one of the outputs of which is connected to the corresponding electric drive, while the chains are rigidly connected to the guide on which installed collectors with jet-forming elements made with the possibility of rotation around the longitudinal axis of the collector. 2. The method according to claim 1, characterized in that the printed products, plates or sheets placed on the suspensions are processed as flat products. 3. The method according to claim 1, characterized in that the distance l, providing the smallest aeration value of the jets of the processing medium, at least for processes of jet-dynamic chemical processing, is determined from the condition:

Where

- the outlet diameter of the nozzle hole of the jet forming element, mm 4. The method according to claim 1, characterized in that the duration of the cycle of the reciprocating movement of the collector

choose from the ratio:

Where

- the duration of the unloading of products from the bath jet dynamic chemical processing, s;

- the maximum duration of the movement of products from the bath of the jet-dynamic chemical treatment to the bath of the jet-dynamic washing, s;

- the duration of the loading of products in the bath jet dynamic washing, s;

- the inertia of the local pressure system connected to the tank with rinsing water for conducting operations of jet-dynamic washing of products in a bath of jet-dynamic washing, p. 5. The method according to claim 1, characterized in that after the end of the chemical treatment processes, the internal surfaces of the collectors and jet-forming elements are cleaned by supplying water used in the subsequent jet-dynamic washing operation.

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