TWI537085B - Flux cleaning method - Google Patents

Description

Flux cleaning method

A cleaning method, in particular, a cleaning method for removing a flux by using a high-pressure high-temperature water jet stream, and the cleaning liquid can also be recycled and reused.

Flux is usually a mixture of rosin as a main component and is an auxiliary material to ensure the smooth progress of the welding process. Welding is the main process in electronic assembly. Flux is the auxiliary material used in soldering. The main function of flux is to remove the oxide and the oxide on the surface of the soldered base material, so that the metal surface can reach the necessary cleanliness and prevent the surface from soldering. The oxidation again reduces the surface tension of the solder, improves the soldering performance, and the performance of the flux directly affects the quality of the electronic product.

However, flux or oil stains can hinder the transmission of electronic component signals, so cleaning operations are often required to dissolve and remove flux or grease. Fluxes generally have two types of water-soluble fluxes and oil-soluble fluxes. Water-soluble fluxes are mostly washed directly with clean water, while oil-soluble fluxes are washed with a solvent to remove them. In addition, there is a cleaning operation by ultrasonic cleaning to remove flux or grease. Although it can effectively remove flux or grease, ultrasonic waves can damage electronic components and cause accelerated aging of electronic components.

However, the conventional technique uses the flushing method to remove the flux, because the water flow is difficult to concentrate on the surface of the electronic component, and the flushing water flow is insufficient, so it is difficult to remove the adhesive flux from the electronic component. Removal, in order to achieve the purpose of removing the flux, it is necessary to repeatedly rinse, thus causing the use of water or solvent to double, and the manufacturing cost is also increased. In addition, the rinsed clean water can not be recycled and reused because it has been mixed with flux or oil stains, and must be sent to the wastewater treatment plant, which not only increases the manufacturing cost, but also wastes water resources. If it is not properly disposed or leaked, it will It will affect the natural environment.

The main object of the present invention is to provide a flux cleaning device comprising a clear a washing device for spraying a cleaning liquid on an electronic component to remove a material to be removed on the electronic component; a liquid collecting tank disposed in the liquid collecting tank for receiving the mixture to be mixed a cleaning liquid for removing the object; a separating device connected to the lower side of the liquid collecting tank by a first pipe to receive the cleaning liquid discharged from the liquid collecting tank and mixed with the object to be removed, the object to be removed Naturally separated from the cleaning liquid, wherein the cleaning material is suspended above the cleaning liquid; a circulating liquid supply device receives the cleaning liquid from the separation device, and returns the cleaning liquid to the cleaning device for reuse.

The invention is characterized in that the cleaning device generates a high-pressure and high-temperature water jet flow, and the high-pressure high-temperature water jet flow is directly sprayed on both sides of the electronic component, so that the cleaning device can clean the high-pressure hot water cutter flow during cleaning. Effectively concentrated on the surface of the electronic component, and the high-pressure flushing hot water flow is strong and powerful, so that the adhesive flux can be effectively removed from both sides of the electronic component without damaging the surface of the electronic component. In turn, improve the quality and yield of electronic products.

Another feature of the present invention is that the liquid collecting tank sends the cleaning liquid collected by the cleaning liquid together with the cleaning liquid to the separating device for separation processing, and the circulating liquid supply device further separates the cleaning. The liquid is supplied to the cleaning device for cleaning treatment, so that the cleaning liquid can be recycled and reused, thereby greatly reducing the amount of water or solvent, thereby greatly reducing the manufacturing cost and avoiding affecting the natural environment.

Another object of the present invention is to provide a flux cleaning method comprising: rinsing a material to be removed on the electronic component with a water jet flow; immersing the electronic component in a liquid; and removing the electronic component by ultrasonic cleaning The object to be removed. In the above method, the electronic component is maintained in the transport state, in addition to avoiding secondary contamination of the electronic component by the object to be cleaned, and continuously cleaning a plurality of electronic components, thereby improving cleaning efficiency.

In addition, the to-be-cleaned material and the rinsed water jet stream are mixed and flowed into a separating device through a collecting tank, and the separating device separates the to-be-cleaned material from the flushed water jet stream, and after separating The rinsed water jet flows through a circulating liquid supply device and acts as a water jet for flushing the object to be removed on the electronic component.

100‧‧‧ Flux cleaning device

1‧‧‧cleaning device

11, 13‧‧‧ waterjet device

111‧‧‧ spout

T11‧‧‧ first pipeline

2‧‧‧ sump

3‧‧‧Separation device

31‧‧‧Separation tank

33‧‧‧Overflow trough

4‧‧‧Circulating liquid supply device

6‧‧‧ heating device

7‧‧‧ Temperature sensing device

T21‧‧‧Second line

T31, T33‧‧‧ third pipeline

D‧‧‧ gap

S10, S20, S30‧‧‧ steps

The first figure is a schematic side view of the flux cleaning device of the present invention.

The second figure is a front view of the flux cleaning device of the present invention.

The third figure is a schematic flow chart of the flux cleaning method of the present invention.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

Referring to the first figure, a side view of the flux cleaning apparatus of the present invention, see the second drawing, a front view of the flux cleaning apparatus of the present invention. As shown in the first and second figures, the flux cleaning apparatus 100 of the present invention comprises a cleaning device 1, a liquid collection tank 2, a separation device 3, and a circulating liquid supply device 4.

The cleaning device 1 is configured to spray a cleaning liquid on an electronic component (not shown) to remove a to-be-removed object on the electronic component, wherein the cleaning device 1 is composed of two waterjet devices 11, 13. The two water jet devices 11 and 13 each have a plurality of nozzles 111, which are correspondingly arranged and separated by a gap d for the electronic component to pass through, and the two sides of the electronic component are respectively The cleaning liquids are ejected from the nozzles 111 of the two water jet devices 11, 13 corresponding to the nozzles 111 of the two water jet devices 11, 13.

Preferably, the cleaning solution is water or other suitable liquid, and the object to be removed is flux, oil, grease or other foreign matter.

Thereby, when the cleaning liquid is ejected from the nozzles 111 of the two water jet devices 11, 13, a plurality of powerful high-pressure water jet flows are formed, and the high-pressure water jet flows directly to the electronic component. On both sides, the object to be removed on the electronic component is effectively removed. Preferably, the nozzles 111 are of a slit type or a slit type to form a plurality of powerful high-pressure water jet flows when the cleaning liquid is ejected from the nozzles 111 of the two water jet devices 11 and 13.

The cleaning device 1 is disposed in the sump 2 to receive the cleaning liquid mixed with the object to be removed. The separating device 3 is connected to the lower portion of the sump 2 by a first pipe T11 to receive the cleaning liquid discharged from the sump 2 and mixed with the object to be removed, and the object to be removed and The cleaning liquid is separated, wherein the cleaning liquid has a specific gravity smaller than that to be removed, so that the object to be removed is suspended above the cleaning liquid.

The separating device 3 comprises a plurality of separating grooves 31. For example, referring to the embodiment, the separating device 3 includes three separating grooves 31, and the bottoms of the separating grooves 31 are connected to each other. In this way, the cleaned cleaning liquid can be circulated between the separation tanks 31; if the positions of the separation tanks 31 are properly disposed, the cleaned cleaning liquid can be flowed to a predetermined direction. For example, flow to the circulating liquid supply device 4.

Preferably, the present invention further includes an overflow tank 33 disposed outside the at least one or more separation tanks 31 for receiving the overflow from the separation tank 31. Clearance.

The circulating liquid supply device 4 receives the cleaning liquid from the separation device 3, and supplies the cleaning liquid to the cleaning device 1 for reuse. A second pipeline T21 is connected between the circulating liquid supply device 4 and the separation device 3, so that the circulating liquid supply device 4 can take the clean cleaning liquid obtained by the separation device 2, and the cleaning liquid is obtained. The circulating liquid supply device 4 is connected to the two water jet devices 11 and 13 by two third pipes T31 and T33, and the circulating liquid supply device 4 supplies the clean cleaning liquid to the two third pipes T31 and 33. This cleaning device 1 is reused. Preferably, the circulating liquid supply device 4 is a pump or a shaftless pump.

In a preferred embodiment of the present invention, a heating device 6 and a temperature sensing device 7 are further disposed in the separating device 3, and the heating device 6 determines whether to heat the cleaning liquid according to the temperature sensing state of the temperature sensing device 7. A predetermined temperature range, such as when the temperature sensed by the temperature sensing device 7 is lower than the predetermined temperature range, the heating device 6 heats the cleaning liquid to the predetermined temperature range.

The invention is characterized in that the cleaning device 1 generates a high-pressure and high-temperature water jet flow, and the high-pressure high-temperature water jet flow is directly sprayed on both sides of the electronic component, so the cleaning device is in the high-pressure hot water knife during cleaning. The flow energy is effectively concentrated on the surface of the electronic component, and the high-pressure flushing hot water flow is strong and powerful, so that the adhesive flux can be effectively removed from both side surfaces of the electronic component without damaging the electronic component. Surface, which in turn improves the quality and yield of electronic products.

Another feature of the present invention is that the sump 2 separates the object to be cleaned from the cleaning liquid and the cleaning liquid to the separating device 3 for separation treatment, and the circulating liquid supply device 4 is separated again. The cleaning liquid is supplied to the cleaning device 1 for cleaning treatment, so that the cleaning liquid can be recycled and reused, thereby greatly reducing the amount of water or solvent, thereby greatly reducing the manufacturing cost and avoiding affecting the natural environment.

Referring to the third figure, a schematic flow chart of the flux cleaning method of the present invention. Like the third Step S10 of the figure, firstly, flushing a to-be-cleaned object on an electronic component with a water jet flow, specifically, spraying a plurality of high-pressure water jet streams directly onto both sides of the electronic component, thereby effectively rushing In addition to the object to be removed on the surface of the electronic component, when the object to be removed on the electronic component is flushed with a water jet, the electronic component remains in a transport state.

Preferably, the water jet flow is generated by the flux cleaning device 100 described above.

Then, as shown in step S20 of the third figure, the electronic component is immersed in a liquid, wherein when the electronic component is immersed in the liquid, the electronic component is kept in a transmitting state, thereby reducing the remaining on the electronic component. The adhesion of the object to be removed to the electronic component while avoiding secondary contamination of the electronic component by the object to be cleaned.

In a preferred embodiment of the invention, the liquid is placed in a chamber or a plurality of separately disposed chambers, and the liquid level of the liquid in the chamber is above the electronic component.

Finally, as shown in step S30 of the third figure, the object to be removed remaining on the electronic component is removed by ultrasonic cleaning, and the adhesion of the object to be removed to the electronic component is weakened in the previous stage, so The sonic cleaning can completely remove the object to be removed from the surface of the electronic component. When the electronic component is ultrasonically cleaned, the electronic component is kept in a transmitting state to continuously clean a plurality of electronic components, thereby preventing the electronic component from being secondaryly contaminated by the object to be cleaned, thereby improving cleaning efficiency and product yield.

In a preferred embodiment of the present invention, as described in paragraph [0026], the ultrasonic cleaning is performed in one of the chambers, and preferably, the chamber for ultrasonic cleaning is being made. After soaking the chamber (ie, step 20).

In addition, the to-be-cleaned material and the rinsed water jet stream are mixed and flowed into a separating device through a collecting tank, and the separating device separates the to-be-cleaned material from the flushed water jet stream, and after separating The rinsed water jet flows through the circulating liquid supply device and acts as a water jet for flushing the object to be removed on the electronic component, as shown in the first and second figures.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

100‧‧‧ Flux cleaning device

1‧‧‧cleaning device

11‧‧‧Waterjet device

111‧‧‧ spout

T11‧‧‧ first pipeline

2‧‧‧ sump

3‧‧‧Separation device

31‧‧‧Separation tank

4‧‧‧Circulating liquid supply device

6‧‧‧ heating device

7‧‧‧ Temperature sensing device

T21‧‧‧Second line

T31‧‧‧ third pipeline

Claims (4)

A flux cleaning method comprising: rinsing a material to be removed on the electronic component with a water jet; immersing the electronic component in a liquid, wherein the electronic component is kept in a transmission when the electronic component is immersed in the liquid a state; and cleaning the object to be removed on the electronic component by ultrasonic cleaning. The flux cleaning method according to claim 1, wherein the electronic component is kept in a transport state when the object to be removed on the electronic component is flushed with a water jet. A flux cleaning method according to claim 1, wherein when the electronic component is ultrasonically cleaned, the electronic component is maintained in a transport state. According to the flux cleaning method of claim 1, wherein the object to be cleaned and the rinsed water jet are mixed and passed through a liquid collection after flushing the object to be removed on the electronic component with a water jet stream. The tank flows into a separating device, the separating device separates the water to be purged from the flushed water jet, and the separated washed water jet flows through a circulating liquid feeding device to rinse the electronic component. The water knife flow of the object to be removed.