JP2021169661A - High-pressure atomization spraying device dedicated to electroplating production - Google Patents

Abstract

To provide a high-pressure atomization spraying device capable of: reducing chromium-containing waste water; reducing the amount of electroplating ions input and the amount of rinse water input; and obtaining more thorough cleanness.SOLUTION: A high-pressure atomization spray is used in a plating line including a water washing tank 11, an electroplating tank 12, a soaking tank 13 and a cleaning tank 14, all of which are linearly arranged. Replenishment of water content and concentration of electroplating ions are performed by replenishing the electroplating tank with a liquid in the soaking tank, and replenishment of water content in the soaking tank is performed with a cleaning solution in the cleaning tank, thereby forming water circulation of a plating solution, reducing the amount of water used, and reducing the loss of the electroplating ions.SELECTED DRAWING: Figure 1

Description

The present invention relates to the field of electroplating processing technology, and specifically to a high-pressure spray spray device dedicated to electroplating production.

During electroplating, the coated metal or other insoluble material is used as the anode, the work to be plated is used as the cathode, and the cations of the coated metal are reduced on the surface of the work to be plated to form a coating layer. .. There are two main cleaning methods after electroplating, one is the conventional working method, that is, the manual pull tube cleaning method, in which the plate cleaning water is artificially controlled and tap water is wasted. Therefore, the chemical solution contains strongly acidic hexavalent chromium, it is necessary to use a large amount of alkaline chemicals for the neutralization reaction, and there is a problem of low work efficiency. Yes, in such a method, after washing the plate several times, the concentration of the chemical solution component contained in the fresh water of the immersion tank becomes high, and it is necessary to replace the water in the immersion tank after two days of production. Unlike the above method, it is not necessary to manually wash one plate, which improves efficiency, but waste of tap water is still a big problem.

Therefore, at present, there is a demand for a high-pressure spray spraying device that can reduce the amount of chromium-containing wastewater, and at the same time, reduce the amount of electroplating ions input and the amount of cleaning water input, and has a more thorough cleanliness.

The present invention provides a high-pressure spray spray device dedicated to electroplating production, which comprises the following devices.

The electroplating cleaning device is composed of a water cleaning tank, an electroplating tank, a dipping tank and a cleaning tank provided in a row in which the drain rack is used to remove water from the plated parts after cleaning. An injection port is provided on the tank, the tanks are independent of each other, an air exposure head is provided at the bottom of the water washing tank, the immersion tank, and the cavity of the washing tank, and the air exposure head stirs the liquid in the tank. It is possible, thereby driving the liquid to clean the surface of the plated parts to obtain a better cleaning effect, and the cleaning rack and drain rack are provided in order from bottom to top in the cavity of the cleaning tank, and the cleaning is performed. The rack is used to clean the plating solution on the plated parts.

The drive is used to move the electroplated parts onto the electroplated washer.
The two slide rails including two slide rails erected on the electroplating cleaning device are provided on both sides of the water cleaning tank, the electroplating tank, the immersion tank and the cleaning tank, respectively, and the plated parts are provided by the slide rail structure. It is transferred between different tanks, the gantry is connected to the slide rail via a slider, and a plating structure is provided on the gantry.

The water circulation device includes a first water pump, a second water pump, and a water supply pipe. The water supply pipe is divided into a first branch pipe and a second branch pipe, and one end of the first branch pipe is said. It is connected to the washing tank, the other end is connected to the immersion tank via the first water pump, one end of the second branch pipe is connected to the immersion tank, and the other end is connected to the immersion tank via the second water pump. Is connected to the electroplating tank.

During the use of the electroplating tank, the high temperature of the electroplating causes the water in the plating solution to evaporate.
It is necessary to constantly add water, and when water is added, the concentration of electroplating ions decreases, and the liquid in the immersion tank repeatedly immerses the plated parts from the electroplating tank, so the electroplating ions are contained in it. The amount gradually increases, and based on this situation, the present invention replenishes the electroplating tank with the liquid in the immersion tank, replenishes the water to maintain the concentration of electroplating ions, and the cleaning tank. The cleaning solution inside can be used to replenish the water in the immersion tank, thereby forming a water circulation of the plating solution, which not only saves the amount of water used, but also reduces the loss of electroplating ions.

The air supply device is composed of an air pump, an air supply pipe, a flow meter, a pressure limiting valve and a pressure gauge. It is supplied to the cleaning rack, drain rack and air exposure head via the pressure limiting valve and pressure gauge, and the air flow rate can be adjusted by the adjusting valve of the flow meter. If the pressure limiting valve is adjusted by observing the pressure gauge, the air pressure can be adjusted. Can be controlled.

The injection conditions can be controlled by adjusting the pressure and flow rate in the circulating water device and the air supply device. In the experimental example, nozzles with different injection parameters are measured with the same injection structure, and the effect of the injection parameters on the high-pressure injection cleaning performance is affected. Analyze and measure different injection structures under the same injection parameters to analyze the effect of the injection structure on the high pressure injection cleaning performance.

Further, a plurality of water mist nozzles are provided on the cleaning rack, a plurality of gas nozzles are provided on the drain rack, and the ring-shaped cleaning rack and the nozzles of the drain rack are directed to the center of the circle. The nozzles of the facing type cleaning rack and the drain rack are arranged to face each other.

When the plated parts are transported from the immersion tank to the cleaning tank, the gantry falls during the transfer process, and the plated parts enter the cleaning tank under the clamp of the clamp structure to work on the cleaning rack and the surface of the plated parts. After cleaning the entire plated parts, the water mist nozzle on the cleaning rack is closed, the gas nozzle on the drain rack is opened, and at the same time the gantry is raised, and the surface of the plated parts is driven by high-pressure airflow. Remove water from the plating.

Further, a one-stage spray hole and a two-stage spray hole communicating with the one-stage spray hole are provided in the spray head portion of the water mist nozzle, and a screw hole is provided in the inner wall of the two-stage spray hole.

The spraying mechanism of the two-stage spray hole is as follows.
A high-pressure water stream is ejected from the spray head of the water mist nozzle into the two-stage spray hole at high speed, and the first-stage spray is generated due to a sudden change in the hole diameter. At this time, the water medium becomes a turbulent state with a high Reynolds number. , It is no longer the ideal continuous phase state. When the water medium is injected into the air from the two-stage spray hole, the degree of turbulence of the fluid turbulence at the outlet of the two-stage spray hole is further strengthened, the second-stage spray occurs, and the conventional direct jet small hole A more uniform and finer mist than the spray nozzle is obtained, and the spray cone angle of the nozzle increases accordingly while maintaining the advantages of high speed spraying.
From the spraying mechanism of the two-stage spray nozzle, it can be seen that the increase in the disturbance intensity of the water medium in the small hole of the second stage of the nozzle is an important factor in which the spray performance is superior to that of the direct jet small hole spray nozzle. Therefore, it is possible to fill the inner wall of the two-stage nozzle with a screw hole, increase the roughness of the hole wall, increase the degree of severe fluid turbulence in the hole, and increase the circumferential tangential component of the outlet jet velocity.

Further, the distance between the cleaning rack and the drain rack can be adjusted, the interval can be adjusted according to the size of the plated parts, and the adjustment range is 5 to 25 cm.

Further, the water mist nozzle includes a main body, a needle valve is provided at the front end position of the main body, a spray hole is provided at the rear end position, and a liquid inlet and a gas inlet are arranged at the middle end position so as to face each other. After air from the air supply device enters the nozzle through the gas inlet, water pressure regulated by the circulating water device enters the nozzle from the liquid inlet, and water and gas are squeezed and collide in the mixing cavity of the water mist nozzle. It is ejected from the spray hole. Different barometric parameters affect the trajectory of water and air in the mixing cavity, resulting in different forces on the water and different spray effects.

Further, an elevating structure capable of adjusting the vertical height of the gantry is provided on the gantry, and a second motor is arranged in the elevating structure. The elevating structure of the gantry allows the plated parts to move vertically, allowing entry and exit in different tanks.

Further, a rotating structure capable of rotating the clamp structure in the horizontal direction is provided on the gantry, a first motor is provided in the clamp structure, and a third motor is provided in the rotating structure. The elevating structure of the gantry allows the plated parts to rotate horizontally, allowing the plated parts to be completely cleaned without blind spots.

A flow meter, a filter and a one-way valve are provided on the first branch pipe and the second branch pipe, respectively. After the water pressure of the circulating water device is supplied by the first water pump and the second water pump and the water is discharged from the water discharge tank, it is filtered with a filter to remove impurities in the water and prevent clogging of the spray hole. , And flowed to the next tank via a flow meter, the direction of water flow is controlled by a one-way valve to avoid contamination of the immersion and cleaning tanks with the plating solution in the electroplating tank due to backflow. , The water flow rate can be controlled by the control valve of the flow meter.

Effects of the Invention The beneficial effects of the present invention as compared with the conventional electroplating spray device are as follows.
(1) In the present invention, the liquid in the immersion tank is used to replenish the electroplating tank, the water is replenished to maintain the electroplating ion concentration, and the cleaning liquid in the cleaning tank is used to replenish the water in the immersion tank. This not only forms a water circulation of the plating solution and saves the amount of water used, but also reduces the loss of electroplating ions.
(2) The present invention is provided with two cleaning structures, a ring type and a facing type, and can flexibly select whether to meet the size requirement of the plated part or to save the amount of water, thereby improving the adaptability of the device. do.
(3) Since the water mist nozzle of the present invention is provided with a two-stage spray hole having a merging function, there are advantages that the cleaning mist has a high injection speed, a short spray distance, and droplets are rapidly destroyed. ..
(4) The overall structure of the present invention is compact, semi-automatic cleaning can be realized without manual work by an operator, and work efficiency is improved.

It is a schematic diagram of the mechanism of this invention. It is a structural schematic diagram of the air supply device of this invention. It is a structural schematic diagram of the washing rack of this invention. It is a structural schematic diagram of the water mist nozzle of this invention. It is a schematic of the whole structure of the two-stage spray hole of this invention. It is an enlarged view of the two-stage spray hole of this invention.

[Explanation of code]
1 Electric plating cleaning device 11 Water cleaning tank 12 Electric plating tank 13 Immersion tank 14 Cleaning tank 141 Cleaning rack 1411 Water mist nozzle 14111 Main body 14112 Needle valve 14113 Liquid inlet 14114 Gas inlet 14115 Spray hole 14116 1-stage spray hole 14117 2-stage spray hole 141171 Screw hole 142 Drain rack 142 1 Gas nozzle 143 Injection port 2 Drive device 21 Slide rail 211 Slider 22 Gantry 23 Clamp structure 231 First motor 24 Elevating structure 241 Second motor 25 Rotating structure 251 Third motor 3 Circulating water device 31 1st water pump 32 2nd water pump 33 Water supply pipe 331 1st branch pipe 332 2nd branch pipe 321 One-way valve 4 Air supply device 41 Air pump 42 Air supply pipe 43 Air exposure head 51 Flow meter 52 Pressure limit Valve 53 Pressure gauge 54 Filter

In order to explain the method and effect of the present invention in more detail, the technical solution of the present invention will be described clearly and completely below with reference to the drawings.

Example 1
In the first embodiment, the door handle and the deflector in the automobile exterior parts are targeted for cleaning, and when the materials of the door handle and the deflector are both PC / ABS alloy plastic and the materials are the same, the amount of water for cleaning the exterior parts is determined. The only influential factors are the size and surface area of the exterior parts, which are cleaned by manual pull tubes and existing spray cleaning equipment.
1. Clean the door handle and deflector after etching with a manual pull tube.
The amount of water used is shown in Table 1.

Table 1 Cleaning of exterior parts with a manual pull tube

2. The door handle and deflector after etching treatment are cleaned with an existing spray cleaning device, and the amount of water used is shown in Table 2.

Table 2 Cleaning of exterior parts with existing spray cleaning equipment

Comparing the data in Table 1 with the data in Table 2, the size of the deflector and the size of the door handle are different, so the cleaning time and amount of water for the deflector are longer than those of the door handle.
Cleaning of exterior parts with an existing spray device requires less water, shorter cleaning time, and improved work efficiency than the manual pull tube method.

Example 2
In the second embodiment, the same cleaning object as in the first embodiment, that is, the door handle and the deflector is cleaned by the high-pressure spray spraying apparatus designed by the present invention for electroplating production, and the structure of the apparatus used is as follows.

As shown in FIG. 1, the high-pressure spray spray device dedicated to electroplating production includes an electroplating cleaning device 1, a driving device 2 for moving an electroplating component onto the electroplating cleaning device 1.
A circulating water device 3 and an air supply device 4 are provided.

The electroplating cleaning device 1 includes a water cleaning tank 11 and an electroplating tank 1 provided in a row.
2. It is composed of an immersion tank 13 and a cleaning tank 14, and an injection port 1 is placed on the cleaning tank 14.
43 is provided, and the tanks are independent of each other, and the water washing tank 11 and the immersion tank 13 are provided.
An air exposure head 43 is provided at the bottom of the cavity of the cleaning tank 14, and the liquid in the tank can be agitated by the air exposure head 43, and the surface of the plated parts is cleaned by the liquid to realize a better cleaning effect. A cleaning rack 141 and a drain rack 142 are provided in the inner cavity of the cleaning tank 14 in order from bottom to top, the cleaning rack 141 cleans the plating solution on the plated parts, and the drain rack 142 cleans the plating liquid. Remove moisture from parts.

The drive device 2 includes two slide rails 21 erected on the electroplating cleaning device 1, and the two slide rails 21 are the water cleaning tank 11, the electroplating tank 12, the immersion tank 13, and the cleaning tank 14, respectively. The slide rail 21 structure provided on both sides of the gantry 22 realizes the transfer of plated parts between different tanks, the gantry 22 is connected to the slide rail 21 via the slider 211, and the clamp structure 23 is placed on the gantry 22.
Is provided.

The circulating water device 3 is composed of a first water pump 31, a second water pump 32, and a water supply pipe 33, and the water supply pipe 33 is divided into a first branch pipe 331 and a second branch pipe 332. One end of the first branch pipe 331 is connected to the cleaning tank 14, the other end is connected to the immersion tank 13 via the first water pump 31, and one end of the second branch pipe 332 is the immersion tank. It is connected to 13 and the other end is connected to the electroplating tank 12 via a second water pump 32.

During the use of the electroplating tank 12, the water content in the plating solution evaporates due to the high temperature of the electroplating, and it is necessary to constantly add water. The plated parts from the electroplating tank 12 are repeatedly immersed, and the content of the electroplating ions gradually increases. Based on such a situation, the present invention electroplates using the liquid of the immersion tank 13. The tank 12 is replenished, the water is replenished to maintain the concentration of electroplating ions, and the cleaning liquid in the cleaning tank 14 is used to replenish the water in the immersion tank 13, forming a water circulation of the plating liquid and irrigation water. Not only can the amount be saved, but the loss of electroplating ions is also reduced.

As shown in FIG. 2, the air supply device includes an air pump 41, an air supply pipe 42, and a flow meter 51.
, The pressure limiting valve 52 and the pressure gauge 53, after the air is compressed by the air pump 41, flows through the flow meter 51 through the air supply pipe 42 as a gas path, and the pressure limiting valve 52 and the pressure gauge 53 are used. The air flow rate is adjusted by the adjusting valve of the flow meter 51, and the air pressure can be controlled by the pressure limiting valve 52 by observing the pressure gauge 53. ..

As shown in FIG. 3, 20 normal water mist nozzles are provided on the cleaning rack 141, 20 gas nozzles 1421 are provided on the drain rack 142, and the ring-shaped cleaning rack 141 and the drain rack 142 are provided. The nozzles of the facing type cleaning rack 141 and the drain rack 142 are arranged so as to face each other toward the center of the circle.

When the plated parts are transported from the immersion tank 13 to the cleaning tank 14, the gantry 2 is being transported.
2 drops and the plated parts enter the cleaning tank while being clamped by the clamp structure 23, the cleaning rack 141 is operated, the electroplating liquid on the surface of the plated parts is cleaned, the entire plated parts are cleaned, and then the cleaning is performed. The normal water mist nozzle on the rack 141 is closed, the gas nozzle 1421 on the drain rack 142 is opened, and at the same time, the gantry 22 is raised, and the moisture on the surface of the plated component is removed by the high pressure air flow.

An elevating structure 24 whose height in the vertical direction of the gantry 22 can be adjusted is provided on the gantry 22, and a second motor 241 is arranged in the elevating structure 24. The elevating structure 24 of the gantry 22 moves the plated parts vertically to achieve infiltration and leaching in different tanks.

A rotating structure 25 capable of rotating the clamp structure 23 in the horizontal direction is provided on the gantry 22, a first motor 231 is arranged in the clamp structure 23, and a third motor 251 is arranged in the rotating structure 25. NS. The elevating structure 24 of the gantry 22 allows the plated parts to be rotated in the horizontal direction, and the plated parts without blind spots can be completely cleaned.

A flow meter 51 and a filter 54 are placed on the first branch pipe 331 and the second branch pipe 332, respectively.
And a one-way valve 321 is provided. After the water pressure of the circulating water device 3 is supplied by the first water pump 31 and the second water pump 32 and the water is discharged from the water discharge tank, a filter is used to remove impurities in the water and prevent clogging of the spray hole. Filtered by 54 and flowed through the flow meter 51 to the next tank so that the water flow direction avoids contamination of the immersion tank 13 and the cleaning tank 14 with the plating solution in the electroplating tank 12 due to backflow. Therefore, it can be controlled by the one-way valve 321 and the water flow rate can be controlled by the control valve of the flow meter 51.

As shown in FIG. 3, facing type cleaning racks 141 and drain racks 142 are provided in the lumen of the cleaning tank 14 in order from bottom to top. Since the door handle and the deflector are different in size, the distance between the drain racks 142 of the cleaning rack 141 is adjusted to select the optimum spacing on the assumption that the same part is completely cleaned.

Table 3 Effect of facing type members on the amount of water used by exterior parts at different intervals

As you can see from the data in Table 3.
1. Regarding the cleaning of the door handle, if the optimum distance between the cleaning rack 141 and the drain rack 142 is 5 cm and the distance is larger than 5 cm, the volume of the door handle is small, so more water is required and the optimum distance is obtained. Is 5 cm.
2. Regarding the cleaning of the deflector, if the optimum distance between the cleaning rack 141 and the drain rack 142 is 10 cm and the distance is smaller than 10 cm, the distance is too small, water consumption is wasted, and the distance is smaller than 10 cm. There is a problem that it requires more water for cleaning, so the optimum spacing is 10 cm.
Comparing the data in 3, Table 3, Table 2, and Table 1, it can be seen that the high-pressure spray spray device designed by the present invention can effectively reduce the amount of water for cleaning exterior parts and save costs.

Example 3
Example 3 is the same as Example 2 except for the following parts.
As shown in FIG. 3, a ring-shaped cleaning rack 141 and a drain rack 142 are provided in the lumen of the cleaning tank 14 in this order from bottom to top.
In Example 3, by adjusting the distance between the ring-shaped cleaning rack 141 and the drain rack 142,
Assuming that the same part is completely cleaned, select the optimum interval that minimizes the amount of water used to clean the exterior parts.

Table 4 Effect of ring-shaped members on the amount of water used by exterior parts at different intervals

Comparing the data in Table 4 and Table 3, we can see the following.
1. Regarding the cleaning of the door handle, the ring-shaped member can be effectively cleaned, the cleaning angle is wider, and the amount of water used is smaller. Therefore, the ring-shaped member is selected for cleaning.
2. Regarding the cleaning of the deflector, the facing type member can be effectively cleaned, the cleaning angle is more suitable for the shape of the exterior part, and the amount of water used is smaller. Therefore, the facing type member is selected and cleaned.

Example 4
Example 4 is the same as Example 3 except for the following parts.
As shown in FIG. 3, 20 water mist nozzles 1411 on the cleaning rack 141.
Is provided, 20 gas nozzles 1421 are provided on the drain rack 142, and the nozzles of the ring-shaped cleaning rack 141 and the drain rack 142 are directed toward the center of the circle, respectively.

As shown in FIG. 4, the water mist nozzle 1411 includes a main body 14111, a needle valve 14112 is provided at the front end position of the main body 14111, and a spray hole 1 is provided at the rear end position.
4115 is provided, and the liquid inlet 14113 and the gas inlet 14114 are arranged to face each other at the middle end position. The air supplied from the air supply device 4 enters the nozzle from the gas inlet 14114 and enters the nozzle.
Water whose pressure has been adjusted by the circulating water device 3 enters the nozzle from the liquid inlet 14113, and after the water and gas are squeezed and collide with each other in the mixing cavity of the water mist nozzle 1411, they are ejected from the spray hole 14115.

In the fourth embodiment, the door handle is targeted for cleaning, and the ring-shaped cleaning rack 141 and the drain rack 1 are used.
The 42 structure is adopted, the water mist nozzle 1411 designed by the present invention is added, and the influence of the water mist nozzle 1411 structure on the amount of washing water is compared.

Table 5 Effect of water mist nozzle 1411 structure on the amount of cleaning water

Comparing the data in Table 5 and Table 4, the water mist nozzle 141 designed in the present invention is compared.
It can be seen that the amount of water used can be effectively reduced and the cost can be reduced according to 1.

Example 5
Example 5 is the same as Example 4 except for the following parts.
Twenty-six water mist nozzles 1411 are provided on the cleaning rack 141, 26 gas nozzles 1421 are provided on the drain rack 142, and the ring-shaped cleaning rack 1
The nozzles of 41 and drain rack 142 are directed toward the center of the circle, respectively. The facing type cleaning rack 141 and the nozzles of the drain rack 142 are arranged so as to face each other.

In the fifth embodiment, the door handle is targeted for cleaning, and a ring-shaped cleaning rack 141 and a drain rack 142 provided with a water mist nozzle 1411 are adopted, and the water mist nozzle 1 is adopted.
Increase the number of 411 and examine the effect of that quantity on the amount of washing water.

Table 6 Effect of the number of water mist nozzles 1411 on the amount of cleaning water

As can be seen from the data in Table 6, as the number of water mist nozzles 1411 increases,
Although the amount of water used increases, the cleaning time is significantly shortened accordingly, and the optimum quantity of the water mist nozzle 1411 structure for the door handle is 23.

Example 6
In the sixth embodiment, it is premised that the same injection structure (ring-shaped cleaning rack 141 and drain rack 142) is adopted, nozzles with different injection parameters (water mist nozzle pressure value) are tested, and the same plated parts are cleaned. High pressure injection cleaning performance with different spray effects (spray hole 141)
The effect on the average droplet diameter at 15 to 10 cm, spray cone angle, and water volume) was analyzed.
Specific results are shown in Table 7.

Table 7 Effect of different water mist nozzle pressure values on high-pressure jet cleaning performance

As can be seen from the data in Table 7, when the path pressure gradually increases, the average droplet diameter at 10 cm from the spray hole 14115 gradually decreases on the premise that the same plated parts are washed, and the spray cone angle and the spray cone angle and The amount of water used will gradually decrease.

Example 7
In Example 7, it is premised that nozzles having the same injection parameters (water mist nozzle pressure value) are used, different injection structures (ring type and opposed type) are tested, and the same plated parts are washed under the same path pressure. High pressure jet cleaning performance with different spray effects (spray holes 14115 to 10c
The effects on the average droplet diameter at m points, the spray cone angle, and the amount of water used) were analyzed, and the specific results are shown in Table 8.

表８中のデータから分かるように、メッキ部品の形状と大きさで洗浄ラック１４１とドレ
ンラック１４２を選択する必要がない場合、環型の洗浄ラック１４１がドレンラック１４
２よりも水を節約でき、生産コストも低減できる。 Table 8 Impact of different injection structures on high pressure injection cleaning performance

As can be seen from the data in Table 8, if it is not necessary to select the cleaning rack 141 and the drain rack 142 for the shape and size of the plated parts, the annular cleaning rack 141 is the drain rack 14
Water can be saved and production cost can be reduced as compared with 2.

Example 8
Example 8 is the same as Example 4 except for the following parts.
A two-stage spray hole 14117 is provided in the spray head portion of the water mist nozzle 1411, and a screw hole 141171 is provided in the inner wall of the two-stage spray hole 14117.
In Example 8, it is mainly examined whether the spraying performance of the water mist nozzle 1411 can be improved by changing the type of the nozzle. Specific experiments assuming that do not change the overall length _{L 1} of water mist nozzles 1411, the diameter _D 1 of the first stage spray hole 14116, two-stage to change the diameter _{D 2} and Nagado _{L 2} of the spray-holes, the nozzle Examine the effect on the type of spray effect.
Specifically, it is divided into three experimental groups.

First group: The variable is the diameter D2 of the _two- stage spray hole, the rest are invariant.
Second group: the variable is the diameter _{D 1} of the first stage spray hole 14116, the remainder being unchanged.
Third group: The variable is the length L2 of the _two- stage spray hole, the rest is invariant.
The spray pressures of this example are pressures of 2 MPa, 6 MPa, and 10 MPa, respectively, and on this premise,
The Sauter average droplet diameter (SMD) of the spray of the final nozzle is detected.

表９中のデータから分かるように、
１、Ｄ_２：Ｄ_１：Ｌ_２：Ｌの比率が一定の場合、噴霧圧の増加に伴い、液滴径が指数関数
的に減少するが、噴霧圧がある値に達すると、液滴径をさらに減少することができなくな
る。
２、同じ噴霧圧の下で、平均液滴径（ＳＭＤ）が１段噴霧穴１４１１６の直径の増加に伴
い増加する。
３、２段噴霧穴１４１１７の噴霧メカニズムが１段噴霧穴１４１１６と同様であるが、２
段噴霧穴１４１１７の２段目小穴の存在によりノズルの噴霧効果が高められる。
従って、２段噴霧ノズルの液滴径の変化傾向が１段噴霧穴１４１１６のそれと基本的に同
じであるが、液滴噴霧の効率がより高い。つまり、同じノズル穴径と噴霧圧では、２段噴
霧穴１４１１７構造の影響がより大きく、噴霧液滴径をさらに小さくすることができる。 Table 9 Effect of spray hole parameters on average drop diameter

As you can see from the data in Table 9.
When the ratio of 1, D ₂ : D ₁ : L ₂ : L is constant, the droplet diameter decreases exponentially as the spray pressure increases, but when the spray pressure reaches a certain value, the droplet diameter decreases. Can no longer be reduced further.
2. Under the same spray pressure, the average droplet diameter (SMD) increases as the diameter of the one-stage spray hole 14116 increases.
3. The spraying mechanism of the two-stage spray hole 14117 is the same as that of the one-stage spray hole 14116, but 2
The spraying effect of the nozzle is enhanced by the presence of the second small hole of the step spray hole 14117.
Therefore, the tendency of change in the droplet diameter of the two-stage spray nozzle is basically the same as that of the one-stage spray hole 14116, but the efficiency of droplet spraying is higher. That is, with the same nozzle hole diameter and spray pressure, the influence of the two-stage spray hole 14117 structure is greater, and the spray droplet diameter can be further reduced.

During electroplating, the coated metal or other insoluble material is used as the anode, the work to be plated is used as the cathode, and the cations of the coated metal are reduced on the surface of the work to be plated to form a coating layer. .. There are two main cleaning methods after electroplating, one is the conventional working method, that is, the manual pull tube cleaning method, in which the plate cleaning water is artificially controlled and tap water is wasted. Therefore, the chemical solution contains strongly acidic hexavalent chromium, it is necessary to use a large amount of alkaline chemicals for the neutralization reaction, and there is a problem of low work efficiency. Yes, in such a method, after washing the plate several times, the concentration of the chemical solution component contained in the fresh water of the immersion tank becomes high, and it is necessary to replace the water in the immersion tank after two days of production. Unlike the above method, it is not necessary to manually wash the plates one by one , which improves efficiency, but waste of tap water is still a big problem.

Claims (6)

Water washing tank (11), electroplating tank (12), immersion tank (1) provided in one row
3) and a washing tank (14), the water washing tank (11) and the immersion tank (1)
An aeration head (43) is provided at the bottom of the lumen of the 3) and the cleaning tank (14), respectively.
An electroplating cleaning device (1) in which a cleaning rack (141) and a drain rack (142) are provided in order from the bottom to the top in the lumen of the cleaning tank (14).
The two slide rails (21) erected on the electroplating cleaning device (1) are included, and the two slide rails (21) are the water cleaning tank (11), the electroplating tank (12), and the immersion tank (12), respectively. The electroplated component provided on both sides of the gantry (13) and the cleaning tank (14), connected to the gantry (22) via a slider (211), and provided with a clamp structure (23) on the gantry (22). A drive device (2) for moving onto the electroplating cleaning device (1), and
It is composed of a first water pump (31), a second water pump (32) and a water supply pipe (33).
The water supply pipe (33) is divided into a first branch pipe (331) and a second branch pipe (332).
One end of the first branch pipe (331) is connected to the cleaning tank (14), the other end is connected to the immersion tank (13) via the first water pump (31), and the second Branch pipe (33
A circulating water device (3) in which one end of 2) is connected to the immersion tank (13) and the other end is connected to the electroplating tank (12) via a second water pump (32).
The air pump (41) is included, and after the air is compressed by the air pump (41), the air flows through the flow meter (51) through the air supply pipe (42) as a gas path, and the pressure limiting valve (52).
And the air supply device (4) supplied to the cleaning rack (141), the drain rack (142) and the aeration head (43) via the pressure gauge (53).
A high-pressure spray spray device dedicated to electroplating production, which is characterized by being equipped with. A plurality of water mist nozzles (1411) are provided on the cleaning rack (141), and a plurality of water mist nozzles (1411) are provided.
The spray spray device according to claim 1, wherein a plurality of gas nozzles (1421) are provided on the drain rack (142). The spray head portion of the water mist nozzle (1411) has a one-stage spray hole (141).
16) and a two-stage spray hole (14117) communicating with the one-stage spray hole (14116) are provided, and a screw hole (141161) is provided on the inner wall of the two-stage spray hole (14117). The spray spray device according to claim 2. The cleaning rack (141) and the drain rack (142) are both ring-shaped and opposed, and the nozzles of the ring-shaped cleaning rack (141) and drain rack (142) face the center of the circle, respectively, and face each other. The spray spray device according to claim 2, wherein the nozzles of the mold cleaning rack (141) and the drain rack (142) are arranged so as to face each other. The spray spray device according to claim 2, wherein the distance between the cleaning rack (141) and the drain rack (142) is adjustable, and the adjustment range is 5 to 25 cm. An elevating structure (24) capable of adjusting the vertical height of the gantry (22) is provided on the gantry (22), and a second motor (241) is arranged in the elevating structure (24). The spray spray device according to claim 1.

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