CN110769605A - Method for prolonging service life of PCB (printed circuit board) glue removal slag groove - Google Patents
Method for prolonging service life of PCB (printed circuit board) glue removal slag groove Download PDFInfo
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- CN110769605A CN110769605A CN201911043646.7A CN201911043646A CN110769605A CN 110769605 A CN110769605 A CN 110769605A CN 201911043646 A CN201911043646 A CN 201911043646A CN 110769605 A CN110769605 A CN 110769605A
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- tank
- potassium permanganate
- pcb
- service life
- groove
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003292 glue Substances 0.000 title claims abstract description 12
- 239000002893 slag Substances 0.000 title claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 109
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 41
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 25
- 238000004065 wastewater treatment Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000001172 regenerating effect Effects 0.000 abstract description 4
- 230000001502 supplementing effect Effects 0.000 abstract 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 8
- 229910052748 manganese Inorganic materials 0.000 description 8
- 239000011572 manganese Substances 0.000 description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000003556 assay Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
The invention belongs to the technical field of circuit board production, and discloses a method for prolonging the service life of a PCB (printed circuit board) glue residue removing groove, which comprises the following steps: s1: discharging the solution of the degumming tank, storing the solution, and cleaning the potassium permanganate tank after evacuation; s2: adding sulfuric acid and hydrogen peroxide into a potassium permanganate tank to ensure that the volume of the sulfuric acid in the potassium permanganate tank accounts for 0.5-5% and the volume of the hydrogen peroxide accounts for 1-6%; s3: emptying the potassium permanganate tank, and then washing the potassium permanganate tank clean by water; s4: pumping the stored degumming tank solution back to the potassium permanganate tank; and (8) after the step of S4, heating, circulating, inflating and regenerating the potassium permanganate tank, then supplementing the liquid level, supplementing potassium permanganate when the temperature is raised to the working temperature, and checking the degumming rate. The invention passes through 10 ten thousand meters per production2The method for cleaning the potassium permanganate tank can change the tank frequency from the original 10 ten thousand meters per production230 ten thousand meters are produced instead of one time2Once. Saves the consumption of potassium permanganate and reduces the difficulty of wastewater treatment.
Description
Technical Field
The invention belongs to the technical field of circuit board production, and particularly relates to a method for prolonging the service life of a PCB (printed circuit board) glue residue removing groove.
Background
At present, on a vertical gantry type PCB (printed Circuit Board) glue residue removing line, the frequency of changing a potassium permanganate glue removing groove is generally 10 ten thousand meters per production2Once replaced, the reason for replacing the groove is mainly as follows: when the production quantity reaches 10 ten thousand meters2During the process, the drilling dirt dissolved in the tank and the manganese dioxide produced by the self reaction are insoluble substances, cannot be regenerated, can block an inflation pipe and adhere to an anode bar of a regenerator, so that the tank liquor turns over unevenly, the degumming is uneven, the regeneration capacity is reduced, the 7-valent manganese is lower and lower, and the 6-valent manganese is lower and lowerManganese is increasingly high. Because potassium permanganate is the control medicine, the more fast the frequency of trading the groove, the bigger is the cost, increases the waste water treatment degree of difficulty simultaneously.
Therefore, it is necessary to provide a new method for prolonging the service life of the PCB desmear tank to solve the above technical problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for prolonging the service life of a PCB (printed circuit board) glue residue removing groove, which can reduce the production cost and the wastewater treatment difficulty.
The invention solves the technical problem by adopting the technical scheme that a method for prolonging the service life of a PCB (printed Circuit Board) glue residue removing groove comprises the following steps:
s1: discharging the solution of the degumming tank, storing the solution, and cleaning the potassium permanganate tank after evacuation;
s2: adding sulfuric acid and hydrogen peroxide into a potassium permanganate tank to ensure that the volume of the sulfuric acid in the potassium permanganate tank accounts for 0.5-5% and the volume of the hydrogen peroxide accounts for 1-6%;
s3: emptying the potassium permanganate tank, and then washing the potassium permanganate tank clean by water;
s4: and pumping the stored solution of the degumming tank back to the potassium permanganate tank.
Preferably, the potassium permanganate tank is heated and then cooled before step S1, and the regenerator is turned off when the temperature drops to 35 ℃ to 45 ℃.
Preferably, after step S2 and before step S3, the potassium permanganate tank is pumped up and cycled for 1H-4H.
Preferably, in step S3, the potassium permanganate tank is washed clean with water, then filled with water, pumped up, circulated for 20min to 50min, and then drained.
Preferably, after the step of S4, the potassium permanganate tank is heated, circulated, inflated and regenerated, then the liquid level is supplemented, when the temperature is raised to the working temperature, potassium permanganate is supplemented, and the degumming rate is checked.
Preferably, in step S1, before discharging the desmear bath solution, the two rinsing baths after preneutralization are emptied and cleaned, and then the desmear bath solution is stored in the two rinsing baths after preneutralization through an external filter; in step S4, the degumming tank solution stored in the two water washing tanks after the pre-neutralization is pumped back into the potassium permanganate tank.
Preferably, in step S2, the volume ratio of sulfuric acid in the potassium permanganate tank is 1% to 3%, and the volume ratio of hydrogen peroxide is 2% to 4%.
Preferably, the regenerator is shut down when the temperature drops to 40 ℃.
Preferably, after the potassium permanganate tank is washed clean by water and is filled with water, the potassium permanganate tank is inflated and circulated for 30 min.
Preferably, after step S2 and before step S3, the potassium permanganate tank is pumped up and recycled for 2H.
Preferably, in step S2, after the sulfuric acid and the hydrogen peroxide solution are added, the liquid level in the potassium permanganate tank does not overflow the anode of the regenerator.
Compared with the prior art, the invention has the advantages that 10 ten thousand meters are produced every time2The method for cleaning the potassium permanganate tank can change the tank frequency from the original 10 ten thousand meters per production230 ten thousand meters are produced instead of one time2Once. Saves the consumption of potassium permanganate and reduces the difficulty of wastewater treatment.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1, the present embodiment includes the steps of:
the method comprises the following steps: the two rinsing tanks after the preneutralization are emptied and washed. The two rinsing baths discharged in the pre-neutralization and the later are respectively a first rinsing bath before neutralization and a second rinsing bath before neutralization. Is convenient for storing the degumming tank solution and recovering in later period.
Step two: the potassium permanganate tank was heated and then cooled, and when the temperature dropped to 40 ℃, the regenerator was shut down. Pumping the solution in the degumming tank into two rinsing tanks through an external filter, and cleaning the potassium permanganate tank after evacuation. The liquid medicine in the potassium permanganate tank can be cleaned fully.
Step three: adding sulfuric acid and hydrogen peroxide into a potassium permanganate tank to enable the volume ratio of the sulfuric acid in the potassium permanganate tank to be 2% and the volume ratio of the hydrogen peroxide to be 3%, and inflating and circulating the potassium permanganate tank for 2H after the addition is finished. It should be noted that: the hydrogen peroxide is slowly added when being added, so that the over-high foam is avoided; secondly, after the sulfuric acid and the hydrogen peroxide are added, the liquid level in the potassium permanganate tank can not overflow the anode of the regenerator. The potassium permanganate groove is cleaned, so that the service life of the potassium permanganate groove is prolonged conveniently.
Step four: draining liquid in the potassium permanganate tank, then washing the potassium permanganate tank with water, and finally filling the potassium permanganate tank with water. Inflating the potassium permanganate tank, circulating for 30min and then draining water in the tank; the degumming tank solution stored in the two rinsing tanks is pumped back to the potassium permanganate tank. The potassium permanganate tank is fully cleaned, and the use of the degumming tank solution is avoided being influenced.
Step five: heating, circulating, inflating, regenerating and replenishing the potassium permanganate tank, replenishing potassium permanganate through assay analysis when the temperature is raised to the working temperature, and then detecting the degumming rate. And after the glue removing rate is qualified, putting the potassium permanganate tank into use. The actual production verification has no influence on the quality.
By 10 ten thousand meters per production2The method for cleaning the potassium permanganate tank can change the tank frequency from the original 10 ten thousand meters per production230 ten thousand meters are produced instead of one time2Once. Saves the consumption of potassium permanganate and reduces the difficulty of wastewater treatment. And 10 ten thousand meters per production210 ten thousand meters in cleaning potassium permanganate groove2Means that when the production amount reaches 10 ten thousand m2In the process, the drilling dirt dissolved in the tank and the manganese dioxide produced by self reaction are insoluble substances, cannot be regenerated, can block an air inflation pipe and adhere to an anode bar of a regenerator, so that the tank liquor cannot turn overUniform, nonuniform degumming, reduced regeneration capability, lower and lower manganese value of 7 and higher manganese value of 6.
Example two
Referring to fig. 1, the present embodiment includes the steps of:
the method comprises the following steps: the two rinsing tanks after the preneutralization are emptied and washed. The two rinsing baths discharged in the pre-neutralization and the later are respectively a first rinsing bath before neutralization and a second rinsing bath before neutralization. Is convenient for storing the degumming tank solution and recovering in later period.
Step two: the potassium permanganate tank was heated and then cooled, and when the temperature dropped to 45 ℃, the regenerator was shut down. Pumping the solution in the degumming tank into two rinsing tanks through an external filter, and cleaning the potassium permanganate tank after evacuation. The liquid medicine in the potassium permanganate tank can be cleaned fully.
Step three: adding sulfuric acid and hydrogen peroxide into the potassium permanganate tank to enable the volume ratio of the sulfuric acid in the potassium permanganate tank to be 0.5% and the volume ratio of the hydrogen peroxide to be 1%, and inflating and circulating the potassium permanganate tank for 4H after the addition is finished. It should be noted that: the hydrogen peroxide is slowly added when being added, so that the over-high foam is avoided; secondly, after the sulfuric acid and the hydrogen peroxide are added, the liquid level in the potassium permanganate tank can not overflow the anode of the regenerator. The potassium permanganate groove is cleaned, so that the service life of the potassium permanganate groove is prolonged conveniently.
Step four: draining liquid in the potassium permanganate tank, then washing the potassium permanganate tank with water, and finally filling the potassium permanganate tank with water. Inflating the potassium permanganate tank, circulating for 20min, and draining water in the tank; the degumming tank solution stored in the two rinsing tanks is pumped back to the potassium permanganate tank. The potassium permanganate tank is fully cleaned, and the use of the degumming tank solution is avoided being influenced.
Step five: heating, circulating, inflating, regenerating and replenishing the potassium permanganate tank, replenishing potassium permanganate through assay analysis when the temperature is raised to the working temperature, and then detecting the degumming rate. And after the glue removing rate is qualified, putting the potassium permanganate tank into use. The actual production verification has no influence on the quality.
Production of 10 km2The first cleaning is carried out, and the production is 8 ten thousand meters2Is carried out secondSecondary cleaning, 8 ten thousand m of product2A third wash is performed.
By cleaning the potassium permanganate tank, the tank replacement frequency can be changed from 10 ten thousand meters per production originally2One-time production is changed into 26 ten thousand meters per production2Once. Saves the consumption of potassium permanganate and reduces the difficulty of wastewater treatment. To produce 10 ten thousand meters210 ten thousand meters in cleaning potassium permanganate groove2Means that when the production amount reaches 10 ten thousand m2During the process, the drilling dirt dissolved in the tank and the manganese dioxide produced by self reaction are insoluble substances, cannot be regenerated, can block an inflation pipe and adhere to an anode bar of a regenerator, so that the tank liquor is not uniformly overturned, the degumming is not uniform, the regeneration capacity is reduced, the 7-valent manganese is lower and higher, and the 6-valent manganese is higher and higher.
EXAMPLE III
Referring to fig. 1, the present embodiment includes the steps of:
the method comprises the following steps: the two rinsing tanks after the preneutralization are emptied and washed. The two rinsing baths discharged in the pre-neutralization and the later are respectively a first rinsing bath before neutralization and a second rinsing bath before neutralization. Is convenient for storing the degumming tank solution and recovering in later period.
Step two: the potassium permanganate tank was heated and then cooled, and when the temperature dropped to 35 ℃, the regenerator was turned off. Pumping the solution in the degumming tank into two rinsing tanks through an external filter, and cleaning the potassium permanganate tank after evacuation. The liquid medicine in the potassium permanganate tank can be cleaned fully.
Step three: adding sulfuric acid and hydrogen peroxide into the potassium permanganate tank to enable the volume ratio of the sulfuric acid in the potassium permanganate tank to be 5% and the volume ratio of the hydrogen peroxide to be 6%, and inflating and circulating the potassium permanganate tank for 1H after the addition is finished. It should be noted that: the hydrogen peroxide is slowly added when being added, so that the over-high foam is avoided; secondly, after the sulfuric acid and the hydrogen peroxide are added, the liquid level in the potassium permanganate tank can not overflow the anode of the regenerator. The potassium permanganate groove is cleaned, so that the service life of the potassium permanganate groove is prolonged conveniently.
Step four: draining liquid in the potassium permanganate tank, then washing the potassium permanganate tank with water, and finally filling the potassium permanganate tank with water. Inflating the potassium permanganate tank, circulating for 50min, and draining water in the tank; the degumming tank solution stored in the two rinsing tanks is pumped back to the potassium permanganate tank. The potassium permanganate tank is fully cleaned, and the use of the degumming tank solution is avoided being influenced.
Step five: heating, circulating, inflating, regenerating and replenishing the potassium permanganate tank, replenishing potassium permanganate through assay analysis when the temperature is raised to the working temperature, and then detecting the degumming rate. And after the glue removing rate is qualified, putting the potassium permanganate tank into use. The actual production verification has no influence on the quality.
By 10 ten thousand meters per production2The method for cleaning the potassium permanganate tank can change the tank frequency from the original 10 ten thousand meters per production230 ten thousand meters are produced instead of one time2Once. Saves the consumption of potassium permanganate and reduces the difficulty of wastewater treatment. And 10 ten thousand meters per production210 ten thousand meters in cleaning potassium permanganate groove2Means that when the production amount reaches 10 ten thousand m2During the process, the drilling dirt dissolved in the tank and the manganese dioxide produced by self reaction are insoluble substances, cannot be regenerated, can block an inflation pipe and adhere to an anode bar of a regenerator, so that the tank liquor is not uniformly overturned, the degumming is not uniform, the regeneration capacity is reduced, the 7-valent manganese is lower and higher, and the 6-valent manganese is higher and higher.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for prolonging the service life of a PCB (printed Circuit Board) glue residue removing groove is characterized by comprising the following steps:
s1: discharging the solution of the degumming tank, storing the solution, and cleaning the potassium permanganate tank after evacuation;
s2: adding sulfuric acid and hydrogen peroxide into a potassium permanganate tank to ensure that the volume of the sulfuric acid in the potassium permanganate tank accounts for 0.5-5% and the volume of the hydrogen peroxide accounts for 1-6%;
s3: emptying the potassium permanganate tank, and then washing the potassium permanganate tank clean by water;
s4: and pumping the stored solution of the degumming tank back to the potassium permanganate tank.
2. The method for prolonging the service life of the PCB desmearing tank as claimed in claim 1, wherein the potassium permanganate tank is heated and then cooled before step S1, and the regenerator is turned off when the temperature is reduced to 35-45 ℃.
3. The method for prolonging the service life of the PCB desmearing groove as set forth in claim 1, wherein the potassium permanganate groove is inflated and circulated for 1H-4H after the step S2 and before the step S3.
4. The method for prolonging the service life of the PCB scum removing groove as claimed in claim 1, wherein in step S3, the potassium permanganate groove is flushed with water, then filled with water, pumped and circulated for 20min to 50min, and then the water is drained.
5. The method for prolonging the service life of the PCB degumming slag tank according to claim 1, wherein after the step of S4, the potassium permanganate tank is heated, circulated, inflated, regenerated, and then liquid level is supplemented, when the temperature is raised to the working temperature, potassium permanganate is supplemented, and the degumming rate is checked.
6. The method for prolonging the service life of the PCB desmearing tank as claimed in claim 1, wherein in step S1, before the desmearing tank liquid is discharged, the two rinsing tanks at the front and the back of the pre-neutralization are emptied and cleaned, and then the desmearing tank liquid is stored in the two rinsing tanks at the front and the back of the pre-neutralization through an external filter; in step S4, the degumming tank solution stored in the two water washing tanks after the pre-neutralization is pumped back into the potassium permanganate tank.
7. The method for prolonging the service life of the PCB desmearing groove as recited in claim 1, wherein in the step S2, the volume ratio of the sulfuric acid in the potassium permanganate groove is 1-3%, and the volume ratio of the hydrogen peroxide is 2-4%.
8. The method for extending the service life of a PCB desmear tank of claim 2, wherein the regenerator is shut down when the temperature drops to 40 ℃.
9. The method for prolonging the service life of the PCB desmearing groove as recited in claim 4, wherein the potassium permanganate groove is aerated and circulated for 30min after being washed clean by water and filled with water.
10. The method of claim 3, wherein the potassium permanganate tank is pumped and circulated for 2H after step S2 and before step S3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043646.7A CN110769605A (en) | 2019-10-29 | 2019-10-29 | Method for prolonging service life of PCB (printed circuit board) glue removal slag groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043646.7A CN110769605A (en) | 2019-10-29 | 2019-10-29 | Method for prolonging service life of PCB (printed circuit board) glue removal slag groove |
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| CN110769605A true CN110769605A (en) | 2020-02-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713099A (en) * | 2021-12-30 | 2022-07-08 | 江苏迪飞达电子有限公司 | Potassium permanganate adding cylinder and potassium permanganate adding method |
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| CN114713099A (en) * | 2021-12-30 | 2022-07-08 | 江苏迪飞达电子有限公司 | Potassium permanganate adding cylinder and potassium permanganate adding method |
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Application publication date: 20200207 |