SU925431A1 - Conveyer-type washing machine - Google Patents

Description

(54) CONVEYOR WASHING MACHINE

one

The invention relates to the technique of washing products and can be used in the electronic industry, in particular in the assembly and assembly production of electronic equipment CEA for washing from nodes and blocks residues of rosin and water-soluble fluxes from blocks CEA after soldering.

A known conveyor washer comprising cleaning sections with shower systems and a conveyor for mixing articles in these sections PJ.

The disadvantage of this machine is the low quality of the wash.

A conveyor washer is also known, comprising a conveyor mounted in the washing process modules and the deionized water washing module with sumps, inlet and outlet air dampers, collectors located on both sides of the conveyor, and the sumps of the washing modules are connected in series with each other. respectively, with each subsequent module washing or washing 2.

The disadvantage of this machine is the low quality of the wash, since the concentration of the cleaning solution in each module is not maintained.

The aim of the invention is to improve the quality of washing.

The goal is achieved by the fact that in a conveyor washer containing a conveyor mounted in the washing process modules and the Nromshka module with deionized water, with sumps, inlet and outlet air gates, collectors located on both sides of the conveyor, and sumps of the washing modules are connected in series with each other and respectively with each subsequent washing or washing module, according to the principle of each washing and washing module has a defoamer and consists of three x chambers, the first of which is connected to the sump of the previous washing module, and a third to the sump of the corresponding

20, the inlet and outlet air slides and manifolds are placed into the second chamber, the defoamer being designed as a vertical stepped tube mounted with a smaller base in the second chamber.

In addition, the washing module with deionized water has a water purification unit, equipped with ion exchange columns.

FIG. 1 schematically shows a conveyor washing machine; in fig. 2 -

thirty

washing module with deionized water; in fig. 3 - section A-A of FIG. one; in fig. 4 - section bb FIG. 3

The washing machine conveyor contains conveyor 1 (roller), washing modules 2 and 3, rinsing module 4, washing with deionized water 5, washing module 6 and 8 O modules, modules 7 and 8, respectively, loading and unloading. Modules 2, 3, and 5 have inlet 9 and outlet 10 air slides, I-14 collectors placed on both sides of the conveyor 1, settlers 15-17, and settlers 15 and 16 are connected in series with each other and with each successive module named 3 or 5. Each module 2, 3 and 5 has a defoamer 18 and consists of three chambers 19, 20 and 21, the first of which is connected to the sump 15 of the previous washing module, and a third to the sump 16 of the corresponding module 3, while the gates 9, 10 and the collectors 12 are located in the second chamber 20. The antifoam 18 is made in the form of a vertical step of the tube mounted with a smaller base in chamber 20.

Module 5 has a water purification unit, equipped with ion exchange columns 22 with ion exchange resins to obtain deeply demineralized water, and sensors 23 for monitoring water purity, interlocked with conveyor 1.

Conveyor 1 contains separate kinematic interconnected sections for each module and is driven at an adjustable speed.

Pyeo extinguishers 18 are immersed with the lower part into the washing liquid of the sump, and the upper part forms an air chamber for foam deposition and settling of fatty contaminants, the absence of which allows maintaining stable pressure in the manifolds II, 12, and optimum operating conditions of the pumps (Fig. 3).

The collectors 11 and 12 have the ability to reciprocate, consistent with the speed of the conveyor 1, in a direction perpendicular to the direction of movement of this conveyor, while the mixing amplitude of the collectors 11 is equal to the amount of mixing nozzles relative to each other in the same direction, which corresponds to the maximum possible The spraying torch is moistened with the medium on the plane to be washed.

The collectors 13 and 14 are separate pipes with nozzles with a large spray nozzle.

Gates 9 and 10 are adjustable and prevent the penetration and transfer of the cleaning medium from the module to the module during the washing sequence.

Module 6 is made in the form of a thermally insulated chamber with an integrated fan 24 and finned heaters MITs 25 enclosed in an air duct through which the fan drives air into nozzles 26 installed at a certain angle to the plane of the flush blocks.

The length of the conveyor 1 and its speed are designed to ensure maximum productivity of the washer when the fulfillment of the technological requirements for the cleanliness of the blocks is met.

Conveyor washing machine works as follows.

Blocks of electronic equipment, including household equipment, come from

mechanized soldering line or from the accumulator to module 7. The blocks moved by the conveyor 1 continuously enter the washing module 2 with a hard jet of water, where they are subjected to double-sided jet abrasive treatment with surfactant solutions. The blocks are pre-washed from rosin and water-soluble fluxes due to their saponification with hot (.65 ± 5 ° C) surfactant solution and mechanical action of hard

high density jets.

The reciprocating motion of the collectors 11 allows the jets to pass through all points on the block plane. The spent solution flows through the defoamer 18 into the sump 15, from where it is pumped through the filter back to the manifolds 11. The pressure in these manifolds is regulated. At the output of the second chamber of the module 2 washes with rigid jets and-on

the entrance to the second chamber of module 3 is affected by jets of compressed air from air gates 10, which prevent the penetration and transfer of the washing medium from module 2 to module 3. Removed from the blocks

adjustable gates of 9 m 10 residues of the washing medium are discharged into the sump 15 module 2.

The principle of flushing blocks in the next recirculation technological -.

Module 3 is the same as in Module 2. In the last washing medium there is hot (65 ± 5 ° C) water. The module is intended for final recycling of the blocks from water-soluble fluxes and washing solution. From module 2, the blocks along the conveyor 1 enter the rinsing module 4 with hot (65 ± 5 ° С) running water, the latter is connected to the water supply network through

cleaning filters and has a mixer (not shown in the figures) to adjust the temperature of the water. A wide jet spray jet nozzles collectors allows you to wash the entire surface of the blocks. Waste water enters the sump 16 module 3.

After rinsing, the blocks enter the module 5 by recycling finishing cleaning with deionized water, passing

previously through air slides.

The initial water is distilled with a specific resistance of 80-100 kOhmHcm.

It is pumped on two stages of jet washing. The first washing stage includes manifolds 14 with wide-spray nozzles to which distilled water is directly supplied. The second stage, in addition to a pair of collectors 14, additionally includes a cleaning unit consisting of 3 columns 22 with ion exchange resins and water purity sensors 23. Two columns provide a preliminary, and a third - the final purification of the source water. Thus, rinsing in the second stage is carried out with deionized water with a resistivity of 1.5-il5 MOhm - see. Sensors 23 are blocked with conveyor drive 1. Processing of inkjet units from both sides is sprayed with nozzles by them, pressure control is provided. Module 5 also has a defoamer 18, a sump 17 and air adjustable gates. This module is intended for final washing of the nodes and obtaining a certain degree of purity of the blocks being processed after complete removal of flux residues.

Passing through the air gates, the blocks along the conveyor 1 enter module 6, where at the first stage the final volumetric deflation of deionized water residues by high-pressure air jets takes place - the preparatory drying stage, and at the second - the final drying of blocks, drains, dried streams recirculating hot air (60-100 ° C). The nozzle 26 is set at a certain angle, adjustable speed conveyor 1.

The washed and dry blocks are conveyed by the conveyor 1 to the module 8, from where they are removed by the unloader or fed to the hopper.

The optimal speed of movement of this conveyor is chosen depending on the density of installation of the REA blocks, types of fluxes and cleaning media.

The washing machine is connected to the exhaust ventilation system, the module design provides visual observation of the process.

The proposed machine makes it possible to combine separate independent technological washing and drying cycles in a common line, which ensures the reliability of the machine as a whole, good working conditions, saves production space and

energy resources, reduces the number of staff, reduces the cost of manufacturing and installation of the washing machine. The presence of a washing module with deionized water in such a machine significantly improves the quality of washing the blocks. In addition, the machine modules can be used in various designs. The execution of each module from three chambers, the first of which is intended to collect the remnants of washing liquid brought in from the previous module, eliminates contamination of the washing liquid of the module, which helps to preserve the concentration of washing liquid in this module.

The presence of a defoaming agent ensures constant pressure in the streams flowing out of the reservoirs.

Claims (2)

1. A conveyor washer containing a conveyor mounted in the technological sequence of washing modules and a washing module with deionized water, with sumps, inlet and outlet air driers, collectors located on both sides of the conveyor, and the sumps of the washing modules are connected together and respectively with each subsequent washing or washing module, characterized in that, in order to improving the quality of washing, each washing and washing module has a defoamer and is made of three chambers, the first of which is connected to the settling basin of the previous washing module, and a third - to the sump of the corresponding module, while the inlet and outlet air gates and headers are placed in the second chamber, the defoamer is made in the form of a vertical stepped tube, mounted with a smaller base in the second chamber. 2. A machine in accordance with claim 1, wherein the washing module with deionized water has a water purification unit equipped with ion exchange columns. Sources of information taken into account in the examination: 1. USSR author's certificate number 537716, cl. B 08 B 3/02, 1975. 2.Prospekt firm «Electrovert manufacturing with. Ltd, Canada, Bulletin 80-02, July 1975.