JPH09285768A - Work cleaning method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To blow off the contaminant in the gap between works by a jet and to surely clean the work by dipping the work in a liq. solvent, injecting the solvent on the work surface from the shower means moving away from each other in the solvent, sending the solvent into the gap between the works and cleaning the works. SOLUTION: A basket 11 holding many works A in two rows is dipped in a liq. HC (X)of a front HC ultrasonic tank 6. When the basket 11 is lowered and dipped, a shower device 13 is previously retreated to an offset position on one side not interfering with the ascent and descent of the basket 13. An ultrasonic vibrator 9 is driven to inject the same solvent as HC on the work A surface under specified pressure, the shower device 13 is moved in the direction of arrow, the solvent is forcedly sent in between the works A, hence a gap is formed between the works A by the jet from a shower nozzle, the contaminant such as oil in the gap is blown off, and the entire work A including the gap is surely cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work for cleaning a work such as a lead frame or a thin steel plate as an electronic / electrical component using a hydrocarbon (HC), PFC, HCFC or HFC next-generation solvent. A cleaning method and an apparatus therefor.

[0002]

2. Description of the Related Art Generally, a work (product) such as a lead frame or a thin steel plate in the above-mentioned example is formed by press working and has oil and burrs at the time of pressing, so that the works are closely attached to each other. Even if an attempt is made to collectively wash a plurality of such works by a conventional cleaning apparatus, there is a problem that the works cannot be washed because the works are in close contact with each other.

[0003]

According to the first aspect of the present invention, a work is immersed in a solvent liquid, and the solvent is jetted from the shower means which moves away in the solvent liquid to the surface of the work so that the space between the works is increased. By forcibly inserting a solvent into and cleaning, a gap is formed between the works by the jet flow described above,
An object of the present invention is to provide a work cleaning method capable of reliably cleaning the space between the works by blowing away dirt during this period.

According to the second aspect of the present invention, the shower means is provided by jetting the solvent onto the surface of the work in the solvent liquid and forcibly sending the solvent between the works while moving away. It is an object of the present invention to provide a work cleaning device that can form a gap between works by a jet flow from the work, blow away dirt between the works, and reliably perform a cleaning process between the works.

According to a third aspect of the present invention, a work stored in a mesh-shaped rotating body is dipped in a solvent liquid,
It is an object of the present invention to provide a work cleaning method capable of reliably cleaning the space between works by supplying and flowing a solvent between the works according to the work behavior caused by the rotation of the rotating body.

According to a fourth aspect of the present invention, by providing a rotating means for rotating a mesh-shaped rotating body in which the work is housed in the solvent liquid, the work is rotated when the rotating body is rotated by the rotating means. It is an object of the present invention to provide a work cleaning device capable of reliably cleaning the space between the works by supplying the solvent to the spaces between the works and inflowing the solvent.

According to the invention of claim 5 of the present invention, in addition to the object of the invention of claim 1 or 3, the ultrasonic vibration is applied to the work being cleaned so that the work from the shower means is removed. An object of the present invention is to provide a work cleaning method capable of achieving a better work cleaning by the synergistic effect of the work behavior caused by the jet flow or the rotation of the rotating body and the ultrasonic vibration.

[0008]

According to a first aspect of the present invention, a work is immersed in a solvent liquid, and the solvent is jetted from the shower means moving away in the solvent liquid to the surface of the work so that the space between the works is increased. The method is characterized in that it is a work cleaning method in which a solvent is sent to and cleaned.

According to a second aspect of the present invention, there is provided a tank for storing a solvent, and a shower means for ejecting the solvent onto the surface of the work in the solvent liquid and feeding the solvent between the works while moving away from the work. It is a work cleaning device.

The invention according to claim 3 of the present invention is a method for cleaning a work, which comprises immersing in a work solvent liquid stored in a mesh-shaped rotating body and injecting a solvent between the works by the rotation of the rotating body to wash the workpiece. Is characterized in that.

According to a fourth aspect of the present invention, the work is provided with a mesh-shaped rotating body for storing the work, a tank for storing a solvent, and a rotating means for rotating the rotating body in the solvent liquid. It is a cleaning device.

According to a fifth aspect of the present invention, in addition to the configuration of the first or third aspect of the invention, there is provided a work cleaning method for applying ultrasonic vibration to a work being cleaned. Characterize.

[0013]

According to the invention described in claim 1 of the present invention, the work is immersed in the solvent liquid, and the solvent is jetted onto the work surface from the shower means which moves away from the work in the solvent liquid. Since this is the method of forcibly sending the solvent between the works and cleaning, a gap can be formed between the works by the jet flow from the shower means, and the dirt in this gap can be blown away, ensuring a secure space between the works. It has the effect that it can be washed.

According to the invention of claim 2 of the present invention,
The above-mentioned shower means ejects the solvent onto the surface of the workpiece in the solvent liquid and sends the solvent between the workpieces, and moves away from the workpieces. Therefore, the jet flow from the shower means forms a gap between the workpieces. However, since the dirt in the gap is blown away, there is an effect that the cleaning process can be reliably performed between the works.

According to the invention of claim 3 of the present invention,
Inflow of solvent into the mesh-shaped rotating body, that is, the rotating body,
Since the work stored in the rotating body that can flow out is immersed in the solvent liquid, the gap between the works is formed by the behavior of the work due to the rotation of the rotating body, and the solvent is supplied and flows into this gap. There is an effect that cleaning between the works can be surely performed.

According to the invention of claim 4 of the present invention,
Since the above-mentioned rotating means rotates the mesh-shaped rotating body in which the work is housed in the solvent liquid, the work behaves by this rotation, and a gap is formed between the works, and the solvent is contained in this gap. There is an effect that the space between the works can be reliably supplied and flowed to perform a cleaning process.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the invention described in claim 1 or 3, since ultrasonic vibration is applied to the work being cleaned, the behavior of the work due to the jet flow from the shower means or the rotation of the rotating body, Due to the synergistic effect of the combined use with ultrasonic vibration, a better work cleaning effect can be secured.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawings show the work cleaning method and its equipment,
Prior to the description of the work cleaning method, the work cleaning device will be described first.

This work cleaning device comprises a first tank 1 shown in FIG. 1 and a second tank 2 shown in FIG. The above-mentioned first tank 1 is provided with a tank main body 4 in which a work inlet / outlet 3 is formed with its upper opening wide, and in this tank main body 4, a pool tank 5, an anterior HC ultrasonic tank 6, and a posterior HC ultrasonic tank. 7
And an overflow wall 8 is provided between the front and rear HC ultrasonic baths 6 and 7.

Further, at the inner bottom of each of the above-mentioned HC ultrasonic baths 6 and 7, there is provided an ultrasonic vibration means for applying ultrasonic vibration to a work A (specifically, a work such as a lead frame or a thin steel plate). Sound wave oscillators 9 and 9 are attached. Furthermore, HC (x) as a solvent liquid stored in the above-mentioned HC ultrasonic tanks 6 and 7 as a solvent liquid is stored at a predetermined temperature, for example, 45 to 50 ° C.
Heaters 10 and 10 (heating means) with protective tubes
Is arranged.

The above-described work A is mounted in, for example, two rows in a bottomed rectangular basket 11 having an open top as shown in FIGS. At the same time, it is immersed in a solvent solution and pulled up. A shower device 13 as a shower means that horizontally reciprocates in the direction of the arrow in FIG. 1 in the solvent liquid is provided at the above-mentioned spaced position of the work A. The solvent is jetted and the solvent is forcibly sent between the works A and A for cleaning.

This shower device 13 has an inverted T-shaped base pipe 15 having an inlet port 14 at its upper end, and this base pipe 1.
5 and an inverted Y-shaped branch pipe 16, 16 connected in communication with the branch pipe 5, and branch centers 16a, 16 of these branch pipes 16, 16.
a is aligned with the center of the work A in two rows.

[0023] Set the bifurcated branch tube 16 above the shower nozzle, the inner diameter thereof is set to approximately 7.56mm ^φ. The distance between the shower nozzle and the surface of the work A is set to, for example, about 30 to 70 mm, and a jet flow having a pressure of about 3 kg / cm ² is discharged from the shower hole of the shower nozzle so as to be in close contact with each other. The same solvent is forcibly fed between the works A and A.

Here, one shower device 13 (front position H
The shower device on the side corresponding to the C ultrasonic bath 6 is moved and operated by a fluid cylinder 17 (actuator) as a moving unit provided on the front side of the tank body 4, and the other shower device 13 (the rear HC super unit). The shower device on the side corresponding to the sonic tank 7 is moved and operated by the fluid cylinder 18 provided on the rear side of the tank body 4. An air cylinder or a hydraulic cylinder can be used as the fluid cylinder 18 described above.

The liquid feed path for feeding the solvent liquid after the filtering from the above-mentioned front HC ultrasonic device 6 to the inlet port 14 of the shower device 13 is constructed as follows.
That is, an opening / closing valve 20, a liquid feeding pump 21 (liquid feeding means), a line 19 communicating with the bottom of the preceding HC ultrasonic bath 6
Filter 22, on-off valve 23 and flexible line 2
The inlet port 14 is connected via No. 4.

Similarly, the liquid feeding path for feeding the solvent liquid after the inlet port 4 filtering of the shower device 13 from the above-mentioned rear HC ultrasonic bath 7 under pressure is constructed as follows.
That is, the opening / closing valve 26, the liquid feed pump 27 (liquid feed means), the line 25 connected to the bottom of the rear HC ultrasonic bath 7,
Filter 28, on-off valve 29 and flexible line 3
The inlet port 14 is connected via 0.

By the way, the second tank 2 shown in FIG. 2 is provided with a tank main body 32 in which a work inlet / outlet port 31 is formed by widely opening the upper part thereof. The separation tank 35 is partitioned and formed, and an overflow channel 37 is formed between the front of the partition wall 36 of the water separation tank 35 and the portion near the liquid surface of the PFC ultrasonic tank 33.

Further, while PFC (y) is stored in the above-mentioned PFC ultrasonic tank 33 as an example of a solvent, this tank 33 is used.
The same ultrasonic transducer 9 and heater 1 as described above are provided on the inner bottom of the
0, 10 (heating means) are provided, and the heater 10 is used to
It is configured to heat C (y) to a predetermined temperature, for example, 45 to 56 ° C.

Further, the PF in the tank body 32 described above.
A cooling jacket 38 is provided on the four circumferences of the PFC in an intermediate portion between the liquid surface of the ultrasonic tank 33 and the work inlet / outlet port 31.
A PFC vapor layer 39 is formed between the liquid surface of the ultrasonic tank 33 and this cooling jacket 38. In FIG. 2, 40 and 41 are cooling coils, 42 is an outlet port for draining water, and 43 is an outlet port for draining air.

The work A, which has been subjected to the cleaning treatment in the front HC ultrasonic tank 6 and the rear HC ultrasonic tank 6 shown in FIG. 1, is carried into the PFC ultrasonic tank 33 together with the bucket 11, soaked and pulled out. A shower device 1 for ejecting the same solvent (PFC) in the solvent liquid of the PFC ultrasonic bath 33.
The structure of 3 is the same as that of FIGS. 1 and 3, but this shower device 13 shown in FIG. 2 has a fluid cylinder 44 as a moving means.
It is moved by an (actuator).

Further, the liquid sending path for sending the solvent liquid under pressure from the above-mentioned PFC ultrasonic bath 33 to the inlet port 14 of the shower device 13 is constructed as follows. That is, PFC
The inlet port 14 is connected to a line 45 communicating with the bottom of the ultrasonic bath 33 via an opening / closing valve 46, a liquid feeding pump 47 (liquid feeding means), a filter 48, an opening / closing valve 49 and a flexible line 50.

A method for cleaning and rinsing the above-mentioned work A by using the work cleaning device thus constructed will be described below. First, the basket 11 on which a large number of works A are collectively mounted in two rows is immersed in the HC (x) liquid in the front HC ultrasonic bath 6 of FIG. This basket 1
When the immersion of 1 is lowered, the shower device 13 is placed in the basket 11
It is retracted in advance to the one side offset position where it does not interfere with the vertical movement of. That is, since the above-described shower device 13 is configured to be moved by the fluid cylinder 17, it is possible to secure both a shower nozzle moving range and avoid interference with the ascending / descending basket 11.

Next, while driving the ultrasonic vibrator 9 to apply ultrasonic vibration to the work A, the same solvent as HC is jetted onto the surface of the work A from the shower nozzle of the shower device 13 at a predetermined pressure. If the solvent is forcibly sent between the works A and A while moving the shower device 13 in the direction of the arrow, a gap is formed between the works A and A by the jet flow from the shower nozzle. Thus, the entire work A including the space between the works can be surely cleaned by blowing away the dirt.

After the cleaning treatment in the preceding HC ultrasonic bath 6, the work A is pulled up together with the basket 11 and immersed in the HC (x) liquid in the succeeding posterior HC ultrasonic bath 7 in the same manner. Wash. After the cleaning treatment in the rear HC ultrasonic bath 7 described above, the work A is pulled up together with the basket 11 and the P of the next stage is removed.
The FC ultrasonic bath 33 (see FIG. 2) is immersed in the PFC (y) liquid.

Next, while driving the ultrasonic vibrator 9 shown in FIG. 2 to apply ultrasonic vibration to the work A, the shower device 1 described above is used.
The shower nozzle 13 shown in FIG. 2 is used to spray the same solvent as PFC onto the surface of the work A from the shower nozzle 3 at a predetermined pressure.
When the solvent is forcibly sent between the works A and A while moving in the direction of the arrow, a gap is formed between the works A and A by the jet flow from the shower nozzle, and the deposits in this gap (this embodiment In the case of (2), HC) by the cleaning in the previous step is blown off, and the entire work A including the space between the works can be surely rinsed.

After the rinse treatment in the PFC ultrasonic bath 33, the work A and the basket 11 are combined with the PFC vapor layer 39.
Up to steam dry, then work A in basket 1
After being pulled up together with 1 to the upper portion of the cooling jacket 38 and dried, the treated work A is pulled up from the work inlet / outlet 31 together with the basket 11 and carried out to the next step.

As described above, the work A is immersed in the solvent (see HC and PFC) liquid, and the work A is immersed in the solvent liquid.
Since the method is to eject the solvent from the shower device 13 that moves away from the surface of the work A onto the surface of the work A and forcibly send the solvent between the works to perform cleaning and rinsing treatment, the jet flow from the shower device 13 causes the work to flow. A. A gap can be formed between A and the dirt in the gap or HC in the pretreatment process can be blown off, and there is an effect that cleaning and rinsing treatment can be reliably performed between the works.

In addition, since ultrasonic vibration is applied to the work A being washed and rinsed, the shower device 13
Due to the synergistic effect of the combined use of the jet flow from the above and the above-mentioned ultrasonic vibration, it is possible to secure a better work cleaning effect and a better work rinsing effect.

FIGS. 4, 5 and 6 show another embodiment of the work cleaning method and the apparatus therefor. In this embodiment, the basket 11, the liquid feeding path, and the shower device 1 of the previous embodiment are used.
3. Instead of the fluid cylinders 7, 18, 44, a rotating basket 51 having a work inlet / outlet as a mesh-shaped rotating body shown in FIG. 6, and a rotating means for rotating and rocking the rotating basket 51 in the liquid. Motor 52 as
Is used. Instead of the motor 52, other rotating means such as a rotary actuator may be used. Further, the same parts as those of the other previous embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 6, a hexagonal tubular rotating basket 51 having both mesh-shaped left and right side walls is provided, and the central shafts 53, 53 of the rotating basket 51 are pivotally supported, while a ring gear (internal gear) is provided on one side wall. ) 54 is attached. Then, the gear 55 fitted to the rotating shaft of the motor 52 is meshed with the ring gear 54, and the rotating basket 51 is rotated and swung by the drive of the motor 52 via the gear 55 and the ring gear 54. ing.

Although the rotating basket 51 having a hexagonal tubular shape is used in this embodiment, if a solvent can flow in and out of the basket, a square tubular shape other than the hexagonal tubular shape, a polygonal tubular shape, Non-cylindrical or cylindrical baskets can also be used.

A method for cleaning and rinsing the above-mentioned work by using the work cleaning apparatus configured as shown in FIGS. 4 to 6 will be described below. First, the rotating basket 51 containing a large number of works (not shown) is immersed in the HC (x) liquid in the front HC ultrasonic bath 6 in FIG.

Next, while driving the ultrasonic vibrator 9 to apply ultrasonic vibration to the work, the motor 52 is driven to rotate the rotating basket 51, and the work accommodated in the basket is made to move to move the work. A gap is formed in the gap, and a solvent is supplied and flows into the gap to remove oil and other dirt in the gap, and the entire work including the space between the works is surely cleaned.
Here, it is more effective to swing the rotating basket 51 while rotating.

After the cleaning treatment in the preceding HC ultrasonic bath 6, the work is pulled up together with the rotating basket 51 and immersed in the HC (x) liquid in the succeeding posterior HC ultrasonic bath 7 in the same manner. Wash. After the field cleaning treatment in the rear HC ultrasonic bath 7 described above, the work is pulled up together with the rotating basket 51 and immersed in the PFC (y) of the PFC ultrasonic bath 33 (see FIG. 5) in the next stage.

Next, the ultrasonic vibrator 9 shown in FIG. 5 is driven to rotate the rotating basket 51 while applying ultrasonic vibration to the work so that the work accommodated in the rotating basket 51 behaves and a gap is formed in the work. Then, supply the solvent to this gap, flow in,
Deposits in this gap (in this case, H
C) is removed, and the entire work including the work is surely rinsed.

After the rinsing process in the PFC ultrasonic bath 33, the work is pulled up to the PFC vapor layer 39 together with the rotating basket 51 to be steam-dried, and then the work is taken together with the rotating basket 51 to the upper portion of the cooling jacket 38. After being pulled up and dried, the treated work is pulled up from the work inlet / outlet 31 together with the rotating basket 51 and carried out to the next step.

As described above, according to the shallow information method of the above embodiment, the work stored in the rotating basket 51 is treated with the solvent (H
(See C and PFC) This rotating basket 5
Since the gap between the works is formed by the behavior of the works due to the rotation of 1, and the solvent is supplied and flows into the gap, there is an effect that the cleaning and rinsing processing can be reliably performed between the works.

Further, according to the cleaning apparatus of the above-mentioned embodiment, the motor 52 as the above-mentioned rotating means rotates the rotating basket 51 in which the work is stored in the solvent liquid, so that the rotation causes the work to behave. As a result, a gap is formed between the works, and the solvent is supplied and flowed into the gap, so that there is an effect that the space between the works can be surely cleaned.

In addition, when ultrasonic vibration is applied to the work during the above-mentioned cleaning and rinsing processing, the rotating basket 5
Due to the synergistic effect of the behavior of the work by the rotation of 1 and the above-mentioned ultrasonic vibration, it is possible to secure a better work cleaning effect and a work rinsing effect.

In the correspondence between the structure of the present invention and the above-mentioned embodiment, the work of the present invention corresponds to the work A such as the lead frame and the thin steel plate of the embodiment. Similarly, the solvent is HC (hydro). Carbon) and perfluorocarbon (PFC), and the shower means is the shower device 1
Corresponding to 3, the mesh-shaped rotating body is the rotating basket 5
1, the rotating means corresponds to the motor 52, and the tank storing the solvent is the first tank 1 or the second tank 2.
However, the present invention is not limited to the configuration of the above-described embodiment.

For example, in the above embodiment, HC (hydrocarbon solvent) and PFC (fluorine solvent) are given as examples of the solvent. However, these are other solvents such as HCFC, HFC and next generation solvent (AK- 225), and the work as the article to be cleaned is not limited to the lead frame and the thin steel plate described above, and the work having a complicated shape can be used in addition to the work in which the products are easily adhered to each other. Can also be applied to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a first tank used in a work cleaning method of the invention.

FIG. 2 is a sectional view of a second tank used in the work cleaning method of the present invention.

FIG. 3 is an explanatory diagram of a shower device.

FIG. 4 is a sectional view of a first tank used in another embodiment of the work cleaning method of the present invention.

FIG. 5 is a sectional view of a second tank used in another embodiment of the work cleaning method of the present invention.

FIG. 6 is an explanatory view showing a rotating basket-related structure.

[Explanation of symbols]

 1 ... 1st tank 2 ... 2nd tank 13 ... Shower device 51 ... Rotating basket 52 ... Motor A ... Work x ... HC y ... PFC

Claims (5)

[Claims] 1. A work cleaning method in which a work is immersed in a solvent liquid, and the solvent is jetted from the shower means which moves away in the solvent liquid onto the surface of the work to feed the solvent between the works for cleaning. 2. A work cleaning apparatus comprising: a tank storing a solvent; and a shower means for ejecting the solvent onto the surface of the work in the solvent liquid and moving the space apart while feeding the solvent between the works. 3. A method for cleaning a work by immersing it in a work solvent liquid contained in a mesh-shaped rotating body, and injecting a solvent between the works by the rotation of the rotating body to wash the work. 4. A mesh-shaped rotating body for accommodating a work,
A work cleaning device comprising: a tank storing a solvent; and a rotating means for rotating the rotating body in the solvent liquid. 5. The work cleaning method according to claim 1, wherein ultrasonic vibration is applied to the work being cleaned.