CN112170352B - Online cleaning device and cleaning process for system-in-package product - Google Patents
Online cleaning device and cleaning process for system-in-package product Download PDFInfo
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- CN112170352B CN112170352B CN202011139223.8A CN202011139223A CN112170352B CN 112170352 B CN112170352 B CN 112170352B CN 202011139223 A CN202011139223 A CN 202011139223A CN 112170352 B CN112170352 B CN 112170352B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/041—Cleaning travelling work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
- B08B3/123—Cleaning travelling work, e.g. webs, articles on a conveyor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses an online cleaning device and a cleaning process for a system packaging product, wherein the cleaning device comprises a frame, a conveyor belt, a pre-cleaning process section, a chemical isolation process section and a rinsing process section, wherein the conveyor belt is used for driving the product to sequentially pass through the pre-cleaning process section, the chemical isolation process section and the rinsing process section at a certain speed to finish cleaning operation; a cleaning liquid tank is arranged below the pre-cleaning process section, the cleaning process section and the chemical isolation process section and is used for containing cleaning liquid; the pre-cleaning process section and the cleaning process section are respectively provided with an immersion tank for immersing the pre-cleaning chamber and the products in the cleaning chamber; the cleaning process is based on the cleaning device. The invention adopts the structural design of the immersion tank, and carries out immersion treatment on the product while spraying and cleaning, and the immersion effect softens the flux residue, so that the cleaning effect is better.
Description
Technical Field
The invention relates to the technical field of advanced packaging and cleaning of semiconductors, in particular to an online cleaning device and cleaning process for system packaging products.
Background
The functional reliability of the electronic circuit determines the overall reliability of the end product. Along with the influence of miniaturization high-density integration of components and parts on the market, lead-free solder technology, market competitiveness, automatic assembly and the like, the importance of cleaning electronic components is greatly increased, and the cleaning of products also brings technological challenges. Since the product is used in a severe environment, residues at the bottom of the component can attract moisture, causing damages such as leakage current and electrochemical migration, and therefore the bottom terminal of the component must be kept clean.
The leadless process requires higher resin or rosin content for the flux, which makes the flux build up in small spaces more serious. The removal of flux residue from the bottom end is very challenging, as the component size decreases, the Z-axis gap height also decreases. When the Z-axis gap is less than 50 μm, the capillary and wetting action of the flux during reflow causes the bottom of the component to contain a significant amount of flux residue. During cleaning, the cleaning liquid and mechanical action must be wetted and dissolved to establish a flow path for the end residue to be effectively cleaned.
Traditionally, in-line cleaners have used a series of nozzles mounted at the top and bottom of each process section and a mobile conveyor as the only means to provide cleaning and rinsing to the circuit board. However, as circuit boards become smaller, more integrated, and less distant between components, these conventional methods of optimizing the cleaning process have reached a limit.
Disclosure of Invention
Aiming at more than one problem in the prior art, the invention provides an online cleaning device for a system packaging product, which comprises the following specific scheme:
the device comprises a frame, a conveyor belt, a pre-cleaning process section, a chemical isolation process section and a rinsing process section, wherein the conveyor belt is used for driving a product to sequentially pass through the pre-cleaning process section, the chemical isolation process section and the rinsing process section at a certain speed to finish cleaning operation; a cleaning liquid tank is arranged below the pre-cleaning process section, the cleaning process section and the chemical isolation process section and is used for containing cleaning liquid;
the pre-cleaning process section comprises a pre-cleaning chamber and a pre-cleaning spray rod group arranged in the pre-cleaning chamber, wherein the pre-cleaning spray rod group is used for providing cleaning liquid by the cleaning liquid tank to perform pre-cleaning operation on products passing through the pre-cleaning chamber; the cleaning process section comprises a cleaning chamber and a cleaning spray rod group arranged in the cleaning chamber, wherein the cleaning spray rod group is also used for providing cleaning liquid by the cleaning liquid tank so as to carry out cleaning operation on products passing through the cleaning chamber; the bottom of the pre-cleaning chamber and the cleaning chamber are respectively provided with an immersion liquid tank, and cleaning liquid is connected in the immersion liquid tanks and used for immersing products in the pre-cleaning chamber and the cleaning chamber.
Preferably, an ultrasonic vibration plate is further arranged at the bottom in the immersion tank.
Preferably, the rinsing process section comprises a pre-rinsing section, a rinsing section and a post-rinsing section, and a rinsing water tank is arranged below the rinsing process section and used for containing rinsing water;
the pre-rinsing section and the rinsing section respectively comprise a rinsing cavity and a rinsing spray rod group, products are sprayed and rinsed through the rinsing spray rod group, and the bottoms of the rinsing cavities of the pre-rinsing section and the rinsing section are respectively provided with an immersion tank for carrying out immersion operation on the products of the pre-rinsing section and the rinsing section by using rinsing water.
Preferably, the post-rinse section comprises a secondary rinse section and an end rinse section.
Preferably, a rinsing water tank is arranged below the rinsing process section and is used for containing rinsing water; the rinsing water tank comprises a water draining tank, a pre-rinsing tank, a rinsing tank and a secondary rinsing tank which are sequentially and adjacently arranged and sequentially heightened, wherein the secondary rinsing tank is provided with a water inlet, the water draining tank is provided with a water outlet, rinsing water enters the secondary rinsing tank from the water inlet, then flows into the rinsing tank, the pre-rinsing tank and the water draining tank in sequence in an overflow mode, and then is discharged from the water outlet;
the tail end rinsing section is supplied with water through an external water supply device, the secondary rinsing section is supplied with water through a secondary rinsing tank, and spray water of the secondary rinsing section and the tail end rinsing section flows back to the secondary rinsing tank; the rinsing section is supplied with water from a rinsing tank, and spray water of the rinsing section flows back to the rinsing tank; the pre-rinse section is supplied with water from a pre-rinse tank, and shower water from the pre-rinse section flows back to the pre-rinse tank.
Preferably, the chemical isolation process section comprises a chemical isolation chamber and a wind cutting device, and is used for carrying out wind cutting operation on the product from the cleaning process section, and the cleaning liquid of the chemical isolation process section flows back to the cleaning liquid tank.
Preferably, the on-line cleaning device for the packaged products of the system further comprises an air-cutting process section and a drying process section, wherein the air-cutting process section and the drying process section are arranged behind the rinsing process section, the air-cutting process section is used for carrying out drying operation on the rinsed products, and the drying process section is used for carrying out drying operation on the products;
and the wind cutting process sections comprise two groups of wind cutting devices.
The system packaging product online cleaning device also comprises a condensation recovery device, which is used for condensing and recovering steam generated by the pre-cleaning process section, the cleaning process section and the chemical isolation process section;
the condensing and recycling device comprises an exhaust pipeline main body, two cooling pipe assemblies and a plurality of partition boards; the air draft pipeline main body comprises a left ventilation pipeline and a right ventilation pipeline, one cooling pipe assembly is respectively arranged in each ventilation pipeline, each cooling pipe assembly comprises a plurality of cooling pipes, and each cooling pipe assembly is externally connected with a water supply device through a cold water inlet to feed water and is discharged through a cold water outlet;
specifically, be equipped with on the exhaust line main part with cold water inlet, cold water outlet corresponding water inlet box and play water box are used for cold water inlet, cold water outlet and external equipment's connection respectively, and left air pipe front port is put through with system package product online cleaning device pre-cleaning cavity front end, and the rear port connects the air exit, and the air pipe rear port on right side is put through with chemical isolation cavity rear end, and the front port connects the air exit.
Preferably, the cooling pipe is in a serpentine design and is provided with a plurality of heat exchange plates; the partition plate is arranged at the corner of the cooling pipe in the ventilation pipe and is used for forcing the steam entering the ventilation pipe to flow in a serpentine shape along the cooling pipe.
Preferably, the system packaging product online cleaning device further comprises a door assembly and a control panel.
The bottom of the cleaning liquid tank is provided with a heating device for heating the cleaning liquid to a required process temperature, and a thermocouple for monitoring the temperature of the cleaning liquid; the cleaning liquid tank is also provided with a cooling pipeline, and the cleaning liquid in the cleaning liquid tank is cooled and regulated in a mode of externally connecting cooling water.
The online cleaning device for the system packaging product provided by the invention has the following beneficial effects:
1. the pre-cleaning process section and the cleaning process section adopt the structural design of a dipping tank, the products are soaked while being sprayed and cleaned, the dipping effect softens flux residues, cleaning liquid, namely chemical solvent, is gathered on the surface of the plate to reduce the surface tension of the plate, and the chemical solvent is facilitated to quickly permeate to the bottom of the assembly when sprayed and hit, so that the cleaning effect is good, and the device can operate at a higher speed than the traditional device to obtain higher throughput;
2. in the preferred scheme, an ultrasonic vibration plate is also arranged in the immersion liquid box, ultrasonic vibration is transmitted and converted into mechanical vibration, so that the product is easier to clean, and the ultrasonic vibration plate has good effects in removing scaling powder residues and ion pollution under the main body of the component;
3. on the premise of unchanged structure and conveying height of the traditional conveying device, the immersion liquid tank is fused into the product, the product passes through the immersion liquid tank and continuously passes through the traditional spraying section and the chemical isolation section, and the uninterrupted cleaning process allows higher production level and greatly improves the cleaning productivity;
4. in the preferred scheme, the rinsing process section is also provided with a dipping tank, so that the product can be soaked while being sprayed and rinsed, the rinsing efficiency is improved, and meanwhile, the rinsing water can be saved;
5. in the preferred scheme, the design of the condensation recovery device can reduce the steam directly discharged out of the equipment, especially the chemical substances in the cleaning liquid, and the steam is largely condensed and recovered, so that the method is environment-friendly, reduces the difficulty of waste gas treatment, and saves cleaning materials.
The invention also provides an online cleaning process for the system package product, which comprises the following steps:
the method comprises the following steps:
s1: spraying pre-rinsing the product in a cleaning solution soaking environment, wetting and softening the outer soldering flux, and keeping the temperature of the cleaning solution stable in the process;
s2: spraying and rinsing the product in a cleaning liquid soaking environment; the temperature of the cleaning liquid is kept stable in the process;
s3: carrying out air cutting treatment on the cleaned product to realize chemical isolation;
s4: pre-rinsing the product; specifically, the product is subjected to DI water spraying pre-rinsing in a DI water soaking environment;
s5: rinsing the product; specifically, the product is subjected to DI water spray rinsing in a DI water immersion environment;
s5: rinsing the rear end of the product; specifically, the back-end rinsing includes a two-stage DI water spray rinsing operation;
s6: air-drying the product;
s7: and drying the product.
The online cleaning process for the system packaging product provided by the invention has the following beneficial effects:
1. cleaning the product in a soaking environment; the flux residue is softened by the soaking effect, and the surface tension of the flux residue can be reduced by collecting the cleaning liquid, namely the chemical solvent, on the surface of the plate, so that the chemical solvent can be facilitated to quickly permeate to the bottom of the component during spraying striking, and the product is easier to clean;
2. the product is soaked while spraying and rinsing, so that the rinsing efficiency is improved and the rinsing water can be saved.
Drawings
FIG. 1 is a schematic perspective view of an on-line cleaning device for system-in-package products in accordance with an embodiment of the present invention;
FIG. 2 is a view of FIG. 1 with the door assembly removed;
FIG. 3 is a schematic perspective view of another angle of FIG. 2;
FIG. 4 is a schematic perspective view of an on-line cleaning apparatus for system-in-package products according to an embodiment of the present invention, with a door assembly, a pre-cleaning chamber, a chemical isolation chamber, a rinsing chamber, a wind-cutting process section chamber, and a drying process section chamber removed;
FIG. 5 is a schematic diagram of the installation and pipeline connection relationship of an on-line cleaning device for system-in-package products in an embodiment of the invention;
FIG. 6 is a schematic perspective view of a condensation recovery apparatus according to an embodiment;
FIG. 7 is a schematic perspective view of a cooling tube assembly and a separator plate according to an embodiment;
FIG. 8 is a flow chart of an on-line cleaning process for system in package products in accordance with an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples. In the description of the present embodiment, the terms "front", "rear", "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Referring to fig. 1 to 5, the embodiment provides an online cleaning device for a system package product, which comprises a frame 1, a conveyor belt 2, a pre-cleaning process section 3, a cleaning process section 4, a chemical isolation process section 5, a rinsing process section, a wind cutting process section 6 and a drying process section 7, wherein the conveyor belt 2 is used for driving the product 1000 to sequentially pass through the pre-cleaning process section 3, the cleaning process section 4, the chemical isolation process section 5, the rinsing process section, the wind cutting process section 6 and the drying process section 7 at a certain speed to complete cleaning operation. A cleaning liquid tank 12 is arranged below the pre-cleaning process section 3, the cleaning process section 4 and the chemical isolation process section 5 and is used for containing cleaning liquid.
The pre-cleaning process section 3 comprises a pre-cleaning chamber 31 and a pre-cleaning spray bar set 32 arranged in the pre-cleaning chamber 31, wherein the pre-cleaning spray bar set 32 is provided with cleaning liquid by the cleaning liquid tank 12 to perform pre-cleaning operation on the product 1000 passing through the pre-cleaning chamber 31, and specifically, the cleaning liquid is pumped from the cleaning liquid tank 12 to the pre-cleaning spray bar set 32 by a pump 14; the cleaning process section 4 comprises a cleaning chamber 41 and a cleaning spray rod group 42 arranged in the cleaning chamber 41, wherein the cleaning spray rod group 42 is also circularly provided with cleaning liquid from the cleaning liquid tank 12 so as to perform cleaning operation on the product 1000 passing through the cleaning chamber 41, and specifically, the cleaning liquid is pumped from the cleaning liquid tank 12 to the cleaning spray rod group 42 by a pump 17; an immersion liquid tank 33 is further arranged in the pre-cleaning chamber 31 and the cleaning chamber 41 respectively, and cleaning liquid is connected in the immersion liquid tank 33 for immersing the products 1000 in the pre-cleaning chamber 31 and the cleaning chamber 41; the bottom in the immersion tank 33 is also provided with an ultrasonic vibration plate 331 for realizing mechanical oscillation and radiating in the cleaning liquid in the form of ultrasonic mechanical waves; the cleaning liquid of the immersion liquid tank 33 in the pre-cleaning process section 3 and the cleaning process section 4 flows back to the cleaning liquid tank 12 in an overflow mode.
The rinsing process section is used for rinsing the product which is cleaned and comes out of the chemical isolation section and comprises a pre-rinsing section 8, a rinsing section 9, a secondary rinsing section 10 and a tail end rinsing section 11; a rinsing water tank 13 is arranged below the rinsing process section and is used for containing rinsing water; the rinsing water tank 13 comprises a water draining tank 131, a pre-rinsing tank 132, a rinsing tank 133 and a secondary rinsing tank 134 which are sequentially and adjacently arranged and sequentially heightened, the secondary rinsing tank 134 is provided with a water inlet, the water draining tank 131 is provided with a water outlet, rinsing water enters the secondary rinsing tank 134 from the water inlet, then flows into the rinsing tank 133, the pre-rinsing tank 132 and the water draining tank 131 in sequence in an overflow mode, and is then discharged from the water outlet; the pre-rinsing section 8, the rinsing section 9, the secondary rinsing section 10 and the tail end rinsing section 11 respectively comprise a rinsing chamber and a rinsing spray rod group, and the product 1000 is sprayed and rinsed through the rinsing spray rod group; the rinsing spray bar group in the tail rinsing section 11 is externally connected with water supply equipment for supplying water, the secondary rinsing section 10 is supplied with water by a secondary rinsing tank 134, and spray water of the secondary rinsing section 10 and the tail rinsing section 11 flows back to the secondary rinsing tank 134; the rinsing section 9 is supplied with water from the rinsing tank 133, and shower water of the rinsing section 9 flows back to the rinsing tank 133; the pre-rinse section 8 is supplied with water from the pre-rinse tank 132, and shower water of the pre-rinse section 8 flows back to the pre-rinse tank 132.
The bottoms of the rinsing chambers of the pre-rinsing section 8 and the rinsing section 9 are respectively provided with a dipping tank 33 for carrying out dipping operation on the products of the pre-rinsing section 8 and the rinsing section 9 by rinsing water.
The chemical isolation process section 5 comprises a chemical isolation chamber and a wind cutting device, and is used for carrying out wind cutting operation on the product 1000 from the cleaning process section 4, so that the product 1000 is prevented from carrying a large amount of cleaning liquid to the subsequent chamber, and the cleaning liquid of the chemical isolation process section 5 flows back to the cleaning liquid tank 12.
The air-cutting process section 6 is used for performing blow-drying operation on the rinsed product 1000, and the air-cutting process section 6 comprises a front air-cutting device and a rear air-cutting device.
The drying process section 7 is used for drying the product 1000.
Referring to fig. 3, 6 and 7, the on-line cleaning device for the packaged product of the system further comprises a condensation recovery device for condensing and recovering 14 the steam generated by the pre-cleaning process section 3, the cleaning process section 4 and the chemical isolation process section 5. The condensation recovery device comprises an exhaust pipeline main body, two cooling pipe assemblies 142 and a plurality of partition plates 143; the main body of the air draft pipe comprises a left ventilation pipe and a right ventilation pipe (1411 and 1412), one cooling pipe assembly 142 is respectively arranged in the two ventilation pipes (1411 and 1412), the cooling pipe assembly 142 comprises a plurality of cooling pipes 1421, each cooling pipe assembly 142 is externally connected with a water supply device through a cold water inlet 1422 and is discharged through a cold water outlet 1423, and particularly, a water inlet box 1413 and a water outlet box 1414 which are corresponding to the cold water inlet 1422 and the cold water outlet 1423 are arranged on the main body of the air draft pipe and are respectively used for connecting the cold water inlet 1422 and the cold water outlet 1423 with external equipment, and more particularly, one water inlet box 1413 is simultaneously connected with the two cold water inlets 1422, and one water outlet box 1414 is simultaneously connected with the two cold water outlets 1423; the two ventilation pipes (1411, 1412) are not communicated with each other, when the online cleaning device is applied, the front port of the ventilation pipe 1411 on the left side is communicated with the front end of a pre-cleaning chamber of the online cleaning device for the system packaging product, the rear port of the ventilation pipe 1412 on the right side is connected with the rear end of the chemical isolation chamber, and the front port of the ventilation pipe 1412 is connected with the air outlet of the PCBA cleaning device.
The cooling pipe 1421 is in a serpentine design and is provided with a plurality of heat exchange plates; the partition 143 is disposed in the ventilation duct (1411, 1412) at the corner of the cooling duct 1421, and is used for forcing the steam entering the ventilation duct (1411, 1412) to flow in a serpentine shape along the cooling duct 1421, so as to improve the heat exchange efficiency between the steam and the cooling duct 1421, and further improve the condensation effect.
The system package product on-line cleaning device also comprises a door assembly 15 and a control panel 16.
The bottom of the cleaning liquid tank 12 is provided with a heating device 121 for heating the cleaning liquid to a required process temperature, and a thermocouple for monitoring the temperature of the cleaning liquid; the cleaning liquid tank 12 is also provided with a cooling pipeline, and the cleaning liquid in the cleaning liquid tank 12 is cooled and regulated in a mode of externally connecting cooling water.
The working principle and the flow of the invention are as follows:
in preparation for cleaning, cleaning process parameters are set from the control panel 16, wherein the cleaning liquid is heated to a process temperature by the heating device 121 arranged in the cleaning liquid tank 12, when the thermocouple detects that the liquid temperature reaches a set value, the heating device 121 stops working, and when all conditions are met, the cleaning operation can be performed normally. Firstly, placing a product 1000 on a conveyor belt 2, running the conveyor belt 2 at a set speed to bring the product into cleaning operation of each process section, and sequentially entering a pre-cleaning process section 3 and a cleaning process section 4 in the first step, wherein the product 1000 is completely submerged in cleaning liquid in an immersion liquid tank 33, so that the cleaning liquid can reach any position of the product 1000, can invade the bottom of each low-clearance component, and completely eliminates a cleaning blind area; secondly, the ultrasonic electric signal generated by the ultrasonic generator is converted into mechanical oscillation with the same frequency through the piezoelectric effect of the transducer, and is radiated in a chemical solvent in the form of ultrasonic mechanical waves, and the ultrasonic electric signal is matched with the pre-cleaning spray rod group 32 and the cleaning spray rod group 42 to clean the product; and then carrying out chemical isolation through the 5-stage chemical isolation process. When entering the rinsing section, the rinsing section is composed of a bottom immersion liquid tank 33, an ultrasonic vibration plate 331 and a spray boom, the PCBA plate is completely submerged in rinsing water of the immersion liquid tank, so that the rinsing water can reach any position on the product 1000, the rinsing water cannot completely invade the bottom of each low-clearance component due to large surface tension of the water, but cleaning liquid is easily dissolved in the water as a water-based solvent, and a small amount of residual cleaning liquid at the bottom of the component can be smoothly separated out and dissolved in the water due to mechanical oscillation sent by the immersion liquid tank 33, and finally the cleaning liquid residues and rosin soldering flux residues are quickly washed away under the striking force of the spray combination. Then the air-drying and drying operation is carried out through the air-cutting process section 6 and the drying process section 7 in sequence, and finally the air-drying and drying operation is carried out from the tail end of the equipment.
The online cleaning device for the system packaging product provided by the embodiment has the following advantages:
1. the pre-cleaning process section and the cleaning process section adopt the structural design of an immersion tank, the products are soaked while being sprayed and cleaned, the soaking effect enables the scaling powder residues to be softened, the cleaning liquid, namely the chemical solvent, to be gathered on the surface of the plate, so that the surface tension of the plate can be reduced, the chemical solvent is facilitated to quickly permeate to the bottom of the assembly when the spraying is hit, the products are easier to clean under the mechanical oscillation effect of ultrasonic waves, and the effects on removing the scaling powder residues and ion pollution under the main body of the component are good, so that the device can operate at a higher speed, and higher throughput is obtained;
2. on the premise that the structure and the conveying height of the traditional conveying device are unchanged, the immersion liquid tank is fused into the product, the product passes through the immersion liquid tank and continuously passes through the traditional spraying section, the chemical isolation section, the air cutting section and the drying section, and the uninterrupted cleaning process allows higher production level and greatly improves the cleaning productivity;
3. the rinsing process section is also provided with a dipping tank, so that the product can be soaked while being sprayed and rinsed, the rinsing efficiency is improved, and meanwhile, the rinsing water can be saved.
4. The design of the condensation recovery device can reduce the steam directly discharged out of the equipment, especially the chemical substances in the cleaning liquid, and the chemical substances are largely condensed and recovered, so that the device is environment-friendly, reduces the waste gas treatment difficulty and also saves the cleaning materials.
Referring to fig. 8, the embodiment also provides an online cleaning process for a system-in-package product, based on the application of the online cleaning device for the system-in-package product, including the following steps:
s1: spraying and pre-cleaning the product in a cleaning liquid soaking environment, wetting and softening an outer layer scaling powder, and simultaneously adopting ultrasonic vibration to provide an auxiliary loosening function for residues at the bottom of the component; the temperature of the cleaning liquid is kept stable in the process;
s2: spraying and cleaning the product in a cleaning liquid soaking environment, and simultaneously adopting ultrasonic vibration to provide an auxiliary loosening function for residues at the bottom of the component; the temperature of the cleaning liquid is kept stable in the process;
s3: carrying out air cutting treatment on the cleaned product to realize chemical isolation;
s4: pre-rinsing the product; specifically, the product is subjected to DI water spraying pre-rinsing in a DI water soaking environment, and simultaneously, ultrasonic vibration is adopted to carry out pre-rinsing in a matching manner;
s5: rinsing the product; specifically, the product is subjected to DI water spray rinsing in a DI water immersion environment, and ultrasonic vibration is adopted to match rinsing;
s5: rinsing the rear end of the product; specifically, the back-end rinsing includes a two-stage DI water spray rinsing operation;
s6: air-drying the product;
s7: and drying the product.
The online cleaning process for the system packaging product provided by the invention has the following advantages:
1. cleaning the product in a soaking environment; the dipping effect softens the flux residue, the cleaning liquid, namely the chemical solvent, gathers on the surface of the board to reduce the surface tension of the board, and the chemical solvent is facilitated to quickly permeate to the bottom of the component when the spraying is hit, so that the PCBA board is easier to clean under the mechanical oscillation effect of ultrasonic waves;
2. the product is soaked while spraying and rinsing, so that the rinsing efficiency is improved and the rinsing water can be saved.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (4)
1. An on-line cleaning device for a system packaging product is characterized in that: the device comprises a frame, a conveyor belt, a pre-cleaning process section, a chemical isolation process section and a rinsing process section, wherein the conveyor belt is used for driving a product to sequentially pass through the pre-cleaning process section, the chemical isolation process section and the rinsing process section at a certain speed to finish cleaning operation; a cleaning liquid tank is arranged below the pre-cleaning process section, the cleaning process section and the chemical isolation process section and is used for containing cleaning liquid;
the pre-cleaning process section comprises a pre-cleaning chamber and a pre-cleaning spray rod group arranged in the pre-cleaning chamber, wherein the pre-cleaning spray rod group is used for providing cleaning liquid by the cleaning liquid tank to perform pre-cleaning operation on products passing through the pre-cleaning chamber; the cleaning process section comprises a cleaning chamber and a cleaning spray rod group arranged in the cleaning chamber, wherein the cleaning spray rod group is also used for providing cleaning liquid by the cleaning liquid tank so as to carry out cleaning operation on products passing through the cleaning chamber; the bottom of the pre-cleaning chamber and the bottom of the cleaning chamber are respectively provided with an immersion liquid tank, and cleaning liquid is connected in the immersion liquid tanks and used for immersing products in the pre-cleaning chamber and the cleaning chamber so as to ensure that the products are sprayed and pre-cleaned and sprayed and cleaned in a cleaning liquid immersing environment;
an ultrasonic vibration plate is arranged at the bottom in the immersion liquid box;
the rinsing process section comprises a pre-rinsing section, a rinsing section and a post-rinsing section, and a rinsing water tank is arranged below the rinsing process section and used for containing rinsing water;
the pre-rinsing section and the rinsing section respectively comprise a rinsing chamber and a rinsing spray rod group, products are sprayed and rinsed through the rinsing spray rod group, and the bottoms of the rinsing chambers of the pre-rinsing section and the rinsing section are respectively provided with a dipping tank for carrying out dipping operation on the products of the pre-rinsing section and the rinsing section by rinsing water; the rinsing water adopts DI water, and the product is subjected to spray pre-rinsing and spray rinsing in a DI water soaking environment;
the post-rinsing section comprises a secondary rinsing section and a tail rinsing section;
a rinsing water tank is arranged below the rinsing process section and is used for containing rinsing water; the rinsing water tank comprises a water draining tank, a pre-rinsing tank, a rinsing tank and a secondary rinsing tank which are sequentially and adjacently arranged and sequentially heightened, wherein the secondary rinsing tank is provided with a water inlet, the water draining tank is provided with a water outlet, rinsing water enters the secondary rinsing tank from the water inlet, then flows into the rinsing tank, the pre-rinsing tank and the water draining tank in sequence in an overflow mode, and then is discharged from the water outlet;
the tail end rinsing section is supplied with water through an external water supply device, the secondary rinsing section is supplied with water through a secondary rinsing tank, and spray water of the secondary rinsing section and the tail end rinsing section flows back to the secondary rinsing tank; the rinsing section is supplied with water from a rinsing tank, and spray water of the rinsing section flows back to the rinsing tank; the pre-rinsing section is supplied with water from a pre-rinsing tank, and spray water of the pre-rinsing section flows back to the pre-rinsing tank;
the system packaging product online cleaning device also comprises a condensation recovery device, which is used for condensing and recovering steam generated by the pre-cleaning process section, the cleaning process section and the chemical isolation process section;
the condensing and recycling device comprises an exhaust pipeline main body, two cooling pipe assemblies and a plurality of partition boards; the air draft pipeline main body comprises a left ventilation pipeline and a right ventilation pipeline, one cooling pipe assembly is respectively arranged in each ventilation pipeline, each cooling pipe assembly comprises a plurality of cooling pipes, and each cooling pipe assembly is externally connected with a water supply device through a cold water inlet to feed water and is discharged through a cold water outlet;
the air draft pipeline main body is provided with a water inlet box and a water outlet box which correspond to the cold water inlet and the cold water outlet and are respectively used for connecting the cold water inlet and the cold water outlet with external equipment, the front end opening of the left air draft pipeline is communicated with the front end of a pre-cleaning chamber of the online cleaning device for the system packaging product, the rear end opening of the left air draft pipeline is connected with an air outlet, the rear end opening of the right air draft pipeline is communicated with the rear end opening of the chemical isolation chamber, and the front end opening of the right air draft pipeline is connected with the air outlet;
the cooling pipe is in a serpentine design and is provided with a plurality of heat exchange plates; the partition plate is arranged at the corner of the cooling pipe in the ventilation pipe and is used for forcing the steam entering the ventilation pipe to flow in a serpentine shape along the cooling pipe;
the bottom of the cleaning liquid tank is provided with a heating device for heating the cleaning liquid to a required process temperature, and a thermocouple for monitoring the temperature of the cleaning liquid; the cleaning liquid tank is also provided with a cooling pipeline, and the cleaning liquid in the cleaning liquid tank is cooled and regulated in a mode of externally connecting cooling water.
2. The on-line cleaning device for system-in-package products of claim 1, wherein: the chemical isolation process section comprises a chemical isolation chamber and air cutting equipment, and is used for performing air cutting operation on the product from the cleaning process section, and the cleaning liquid of the chemical isolation process section flows back to the cleaning liquid tank.
3. The on-line cleaning device for system-in-package products of claim 2, wherein: the online cleaning device for the packaged products of the system further comprises an air-cutting process section and a drying process section, wherein the air-cutting process section and the drying process section are arranged behind the rinsing process section, the air-cutting process section is used for carrying out drying operation on the rinsed products, and the drying process section is used for carrying out drying operation on the products;
the wind cutting process section is provided with two groups of wind cutting devices.
4. An online cleaning process for a system-in-package product, based on the application of the online cleaning device for the system-in-package product of claim 3, comprising
S1: spraying and pre-cleaning the product in a cleaning liquid soaking environment, wetting and softening the outer soldering flux, and keeping the temperature of the cleaning liquid stable in the process;
s2: spraying and cleaning the product in a cleaning liquid soaking environment; the temperature of the cleaning liquid is kept stable in the process;
s3: carrying out air cutting treatment on the cleaned product to realize chemical isolation;
s4: pre-rinsing the product; specifically, the product is subjected to DI water spraying pre-rinsing in a DI water soaking environment;
s5: rinsing the product; specifically, the product is subjected to DI water spray rinsing in a DI water immersion environment;
s5: rinsing the rear end of the product; specifically, the back-end rinsing includes a two-stage DI water spray rinsing operation;
s6: air-drying the product;
s7: and drying the product.
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| CN202011139223.8A CN112170352B (en) | 2020-10-22 | 2020-10-22 | Online cleaning device and cleaning process for system-in-package product |
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| CN202011139223.8A CN112170352B (en) | 2020-10-22 | 2020-10-22 | Online cleaning device and cleaning process for system-in-package product |
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| CN112170352B true CN112170352B (en) | 2023-08-11 |
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| CN112170352A (en) | 2021-01-05 |
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