JPH07290008A - Washer - Google Patents

Abstract

PURPOSE:To provide a washer by which the washing capability of ultrasonic washing with pure water is improved and rapid drying is attained. CONSTITUTION:A washing block 1 has a washing tank 11 for pure water contg. a surfactant, and rinse tanks 11, 12, 13 14 for storing pure water overflowing from the poststage to the prestage so that the temp. of pure water in the last stage 14 may be higher than that in the prestage. Baskets B in respective tanks except the last stage 14 are supported so as to be freely movable up and down, and ultrasonic oscillators 37 are installed in these respective tanks. A drying block 2 has a hot air drying vessels 21, 23 with an opening/closing cover and vacuum drying vessels 22, 24 with an opening/closing cover. First, ultrasonic washing is performed in pure water contg. surfactant. Next, while a rinse is given in the rinse tanks 11, 12, 13, further ultrasonic washing is repeated. Then, rapid drying is performed by a combination of hot air drying and vacuum drying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a post CFC cleaning machine for cleaning objects such as metal, non-ferrous metal, machined parts or plastic molded parts, which is a combination of pure water and ultrasonic cleaning. Regarding

[0002]

2. Description of the Related Art As a solvent for Bostoflon, a volatile solvent such as alcohol or hydrocarbon has been used, but there is a risk of explosion.

Therefore, there is a case in which a highly safe cleaning machine which uses pure air and ultrasonic cleaning in combination and uses hot air drying in the drying step is used.

[0004]

However, even when the pure water and the ultrasonic cleaning are combined, the cleaning effect is not so high as compared with the solvent, and a high cleaning power is obtained while preventing the pure water from being contaminated. It wasn't enough to show it. Further, when pure water is used, it is necessary to dry it quickly, but hot-air drying takes too much time, and drying stains may occur.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to improve the cleaning power of ultrasonic cleaning with pure water and to achieve rapid drying. There is a possible washing machine.

[0006]

A washing machine according to claim 1, which achieves the above object, comprises a washing block for successively immersing a basket containing an item to be washed, and a drying block for successively drying the item to be washed after washing. In the cleaning device, the cleaning block and the drying block are housed in a common clean box, and the cleaning block is a cleaning tank of pure water containing a surfactant, and pure water overflowing from the latter stage to the former stage, It has a rinse tank of two or more stages stored so that the temperature of pure water in the final stage is higher than the high temperature of pure water in the previous stage, and the baskets in each tank other than the last stage of the cleaning block are supported so as to be vertically movable. An ultrasonic oscillator is attached to each of these tanks, and the drying block has a hot air drying tank with an opening / closing lid and a vacuum drying tank with an opening / closing lid. The in and out is made by a transport means for conveying to the next tank.

The pure water in the cleaning tank of the cleaning block preferably contains a surfactant in an amount of 0.2% by weight or less based on the pure water. It is preferable that the temperature of the pure water in the rinse tank at the last stage of the cleaning block is set to 70 ° C. or higher, and the basket withdrawing speed is set to 12 mm / sec or lower. More preferably, the temperature of pure water in the rinse tank at the last stage of the cleaning block is set to 75 ° C or higher, and the basket lifting speed is set to 12 mm / sec or lower.

[0008] In the transport means, a hang arm for suspending the basket is provided so as to project in the clean box by one more than the number of tanks, and means for vertically moving the hang arm and the hang arm are arranged in the tank. It is preferable that a means for making it slidable by the pitch is provided outside the clean box. It is preferable that the hang arms are separately provided so as to be vertically movable.

[0009]

[Operation] Ultrasonic cleaning is performed in the cleaning tank with pure water containing surfactant, and then ultrasonic cleaning is repeated while rinsing in the rinsing tank. The high purity of the tank is secured, and since the final stage pure water is at a high temperature, the rinsing power is also strong and the pure water cleaning power is improved. Then, a combination of hot air drying and vacuum drying is used to perform high-speed drying with the boiling point of water lowered. Further, the washing block and the drying block are housed in a common clean box so that dust from the outside does not easily enter.

When the amount of the surfactant in the cleaning tank is 0.2% by weight or less, the amount of the surfactant brought into the rinsing tank in the subsequent stage becomes small. The temperature of pure water in the last rinse tank is 70 ° C.
If the above is set, the rinsing force becomes high, and if the raising speed of the basket at the final stage is set to 12 mm / sec or less, the drainage of the surface of the washed product becomes good. Further, when the temperature of the pure water in the rinse tank in the final stage is set to 75 ° C. or higher and the pulling-up speed of the basket in the final stage is set to 10 mm / sec or less, the above-described action is further improved.

Only the necessary hang arms are in the clean box as the conveying means, and the dirt of the vertically movable means and the slidable means of the hang arm is shielded from the clean box. Is transported to. If the hang arm is raised and lowered for each tank, vertical movement during ultrasonic cleaning, controlled lifting at the final stage, and separate loading and unloading matching the opening and closing timing of the lid for the hot air drying tank and the vacuum drying tank are performed individually. You can

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the flow chart of FIG. 1, 1 is a cleaning block,
2 is a drying block and 3 is a clean box.

The cleaning block 1 includes a cleaning tank 11, a first rinse tank 12, a second rinse tank 13, and a third rinse tank 14.
Are arranged in series, and an inlet side conveyor 15 for the cleaning tank 11 and a first conveyor means 16 for suspending and carrying the basket B containing the object to be conveyed with respect to the respective tanks 11, 12, 13, 14 are arranged. Is.

The drying block 2 includes a first set of a first hot air drying tank 21 and a first vacuum drying tank 22, and a second hot air drying tank 23.
And the second set of the second vacuum drying tank 24 are arranged in series, and the outlet side conveyor 25 for the second vacuum drying tank 24 and the tanks 21 and 21 are arranged.
The second transport means 26 for suspending and transporting the basket B containing the transported objects is disposed with respect to 2, 23, and 24.

In the cleaning tank 11, the pure water in the reserve tank 31 is pumped by a pump 31a, a filter 31b and a line 31c.
Sent through. The pure water overflowing from the weir 31d of the cleaning tank 11 returns to the tank 31 through the line 31e and circulates. 0.2% by weight or less of a surfactant is mixed in the pure water in the cleaning tank 11 to enhance the cleaning power of the pure water. Therefore, the pure water returning to the tank 31 contains bubbles, the tank 31 is provided with a bubble removing screen 31f, and the pure water is replenished through the line 31g. If the amount of the surfactant exceeds 0.2%, the cleaning power does not increase in spite of the large amount of the surfactant being brought into the next rinse tank, and therefore the amount of the surfactant required for cleaning is 0%. 0.15 ± 0.03% by weight is preferable.

Pure water having a predetermined flow rate is fed into the third rinse tank 14 at the final stage through the filter 32a and the flow meter 32b, and the pure water overflowing from the inclined plate 33 flows into the second rinse tank 13. Pure water in the second rinse tank 13 is circulated by a pump 34a and a filter 34b, and a predetermined amount of pure water is supplied through the filter 34c and a flow meter 34d. Then, the pure water overflowing from the second rinse tank 13 through the inclined plate 35 flows into the first rinse tank 12. The pure water in the reserve tank 36 is sent to the first rinse tank 12 through the pump 36a, the filter 36b, and the line 36c. The pure water overflowing from the weir 36d of the first rinse tank 12 returns to the tank 31 through the line 36e and circulates.

As shown in the drawing, an ultrasonic oscillator 4 is attached to the cleaning tank 11, the first rinse tank 12, and the second rinse tank 13, and the dirt of the cleaning object is strongly soiled by the fine air bubble cavitation generated by the ultrasonic vibration. Peel off. That is,
Rather than simply rinsing with a solvent, highly precise cleaning and rinsing are performed on micron-scale pores and intricately complicated areas. In order that the action of this ultrasonic cleaning extends to the entire cleaning items in the basket, the conveying means 16 to be described later.
Thus, the baskets in the tanks 11, 12, 13 are moved up and down.

Further, as shown in the drawing, in the tank 31 of the cleaning tank 11, the tank 36 of the first rinse tank 12, and the second
The heater 3 is provided in the rinse tank 13 and the third rinse tank 14.
7 is provided to heat the pure water in each tank. That is,
The temperature of the pure water increases in the order of the cleaning tank 11 → the first rinse tank 12 → the second rinse tank 13 → the third rinse tank 14, and as the cleaning degree increases, the rinsing power also improves. Particularly, in order to ensure the rinsing force in the final third rinse tank 14, it is preferable to use pure water heated to 70 ° C. or higher. More preferably, pure water at 75 ° C or higher is used.

This third rinse tank 14 is the final stage, and it is better to reduce the adhesion of pure water as much as possible after rinsing. Therefore, the speed at which the basket in the third rinse tank 14 is pulled up by the transfer means 16 described later is 12 mm.
If it exceeds / sec, too many water droplets adhere to the surface of the washed product. More preferably, it is pulled up at a speed of 10 mm / sec or less. Further, if impurities are mixed in the pure water in the third rinse tank 14, cleaning failure will occur.
Is attached.

Clean hot air is blown from the nozzle 40a of the first hot air drying tank 21 through the hot air generator 40b and the filter 40c to dry the water droplets adhering to the surface of the washing object in the basket. Hot air blown out is suction port 40d
And is circulated through the hot air generator 40b. In order to accelerate the drying of the water droplets, rocking means for the basket in the first drying tank 21 is provided. Specifically, the swinging means converts the expansion / contraction operation of the actuator connected to the pneumatic line 41 into a swinging operation via a lever, and swings the pedestal on which the basket is placed. In addition, the lid 40e opens and closes in a double door structure to put the basket in and out.

The first vacuum drying tank 22 is a pressure resistant container having a lid 41a that opens and closes by a sliding operation, and has a heater 4 inside.
1b is provided. Inside the first vacuum drying tank 22,
Vacuum is drawn through the line 41b, the vapor condensing clap 41c, and the vacuum pump 41d. The first hot air drying tank 21 and the first vacuum drying tank 22 described above form a first set.

The second hot air drying tank 23 is the first hot air drying tank 21.
Similarly, clean hot air that has passed through the hot air generator 42b and the filter 42c is blown from the nozzle 42a, and the hot air is collected and circulated by the hot air generator 40b through the suction port 42d. Similarly to the first vacuum drying device 22, the second vacuum drying device 24 is also a pressure resistant container having a lid 43a that opens and closes by a sliding operation, a heater 43b is provided inside, a line 43b, a vapor condensing clap 43c, The inside is evacuated through the vacuum pump 43d.
The second hot air drying tank 23 and the second vacuum drying tank 24 form a second set following the first set.

The temperature of the first group is set higher than that of the second group.
The combination of the rapid drying at 70 ° C. and the relatively low temperature (70 to 40 ° C.) in the second set realizes efficient drying as a whole. When high-temperature hot air is blown while swinging the basket in the first hot air drying tank 21 of the first set, and then vacuum is drawn in the first vacuum drying tank 22, water is always vaporized in a boiling state, which makes it difficult to form water drops. Significantly suppresses dry spots caused by. Drying can be achieved even with this first set, but by providing the second set after the first set, it is possible to perform drying while suppressing the temperature of the hot air of the first set to 100 ° C. Suitable for drying plastic molded parts that may be deformed.

The above-mentioned tanks 11-14 and 21-24 are
It is stored in the clean box 3. A shutter 5 is provided on the entrance conveyor 15 of the clean box 3.
1 is provided, and the shutter 52 is also provided at the exit conveyor 25. Clean air from which suspended solids have been removed by the clean air filters 53 and 54 is blown into the clean box 3 to perform pressurized ventilation. That is, the dirty air from the outside air is not sucked into the clean box 3.

However, the first transfer means 16 and the second transfer means 26 for moving the basket B between the tanks 11 to 14 and 21 to 24 of the clean box 3 are required, and the first transfer means 16 is required. Therefore, it is necessary to prevent the second transporting means 26 from being contaminated.

The structure of the conveying means 16 and 17 for that purpose will be described with reference to FIGS. In the overall top view of FIG. 2, a device storage space 4 is provided next to the clean box 3, and only the minimum necessary hang arm 55 for suspending the basket B projects from the space 4 into the clean box 3. Only the slits along the movement locus of 55 are open. This slit is sealed if necessary. Then, in the space 4, the lid moving device 22 a of the first hot air drying tank 22 and the second hot air drying tank 24.
Lid moving device 24a, tanks 31, 36, pump 31
a, 36a, 32a, hot air generators 22a, 24a, and vacuum pumps 41d, 43d are housed. Then, only the necessary piping is introduced into the clean box 3.

As shown in the overall side view of FIG. 3, the hang arm 61 is branched into four hangers 61a, and the four pins on the side surface of the basket B are hooked and hung. The base 61b of this hang arm 61
Is slidably supported by the two bars 62a of the frame 62,
Further, a screw shaft 62 which is rotationally driven by a driving device (not shown)
It is screwed to b and supported so as to be able to move up and down. This frame 6
Frames 63 to 70 having the same structure as that of 2 are arranged in a row, and the total number 9 thereof is one more than the total number 8 of the tanks 11 to 14 and 21 to 24.

Then, the first frame 62 is attached to the entrance side conveyor 15
Is in charge of transporting the basket B from the cleaning tank 11 to the cleaning tank 11 and moving the basket B in the cleaning tank 11 up and down. Second frame 63
Is in charge of transporting the basket B from the cleaning tank 11 to the first rinse tank 12 and moving the basket B up and down in the first rinse tank 12. The third frame body 64 extends from the first rinse tank 12 to the second rinse tank 12.
Transfer of the basket B to the rinse tank 13 and the second rinse tank 1
It is in charge of vertical movement of basket B in 3. The fourth frame body 65 is in charge of carrying the basket B from the second rinse tank 13 to the third rinse tank 14 and controlling the raising of the basket B from the inside of the third rinse tank 14. The fifth frame 66 is in charge of the basket B from the third rinse tank 14 to the first hot air drying tank 21. The sixth frame 67 is in charge of the basket B from the first hot air drying tank 21 to the first vacuum drying tank 22. The seventh frame 68 is in charge of the basket B from the first vacuum drying tank 22 to the second hot air drying tank 23. The eighth frame 69 is a basket B from the second hot air drying tank 23 to the second vacuum drying tank 24.
Is in charge of. The ninth frame 70 is in charge of the basket B from the second vacuum drying tank 24 to the exit side conveyor 25.

The arrangement pitch of each of the tanks 11 to 14 and the first hot air drying tank 21 in the cleaning block is standardized as P1, and the first frame body 62 to the fifth frame body 66 are connected by the connecting rod 71 to form one body. It is designed to slide. Therefore, the slide drive means 72 shown in FIG. 2 is arranged in the storage space 4.
The respective tanks 21 to 24 in the drying block are unified with a larger pitch P2 particularly in accordance with the size of the vacuum drying tank, and the sixth frame 67 to the ninth frame 70 are connected by the connecting rod 73 to be integrated. It is designed to slide. Therefore, the slide driving means 74 shown in FIG. 2 is arranged in the storage space 4.

An example of carrying the basket B by the carrying means will be described with reference to FIG. FIG. 4 shows the entrance conveyor 11
The transfer from the cleaning tank to the cleaning tank 11 is shown. In FIG. 4A, the base portions 61b of the first frame body 62 and the second frame body 63 are individually lowered (arrows a and b), and the hanger 61a is lowered to the bottom of the basket B. The first frame body 62 and the second frame body 63 slide and move as a unit (arrow c), and the hanger 61a enters directly under the pin of the basket B. Then, the first frame body 62
And the base portion 61b of the second frame 63 rises separately (arrow d,
e) and hang the basket B with the hanger 61a. Figure 4
In (b), when the basket B is lifted to the upper limit, it does not interfere with the cleaning tank 11 due to the sliding movement. Then, as shown in FIG. 4C, the first frame 62 is moved directly above the cleaning tank 11 by sliding (arrow f) a distance slightly shorter than the pitch P1. Then, the base portion 61b descends (arrow g), and the basket B is placed in the cleaning tank 11, but it moves up and down (arrow h) in the middle of the descending operation to perform ultrasonic cleaning on the basket B.
Make sure to spread the entire wash inside. When the cleaning is completed, the base portion 61b is further lowered (arrow i), and the basket B
The base 11a in the cleaning tank 11 is transferred. And the first
The entire frame 62 slides slightly (arrow j), and the hanger 61a is removed from the basket B. And the base 6
1a rises to the upper limit (arrow l), the entire first frame 62 slides (arrow m), the base portion 61a slightly descends (arrow n), and returns to the state of FIG. 4 (a). The remaining frames also move in the same manner, and the basket B is fed in sequence.

Since the base portions 61b of the respective frame bodies 62, 63, ... Can be raised and lowered individually, they can be moved up and down in the cleaning tank 11, controlled lifting in the third rinse tank 14 at the final stage, and hot air drying tank. It is possible to quickly move up and down in conjunction with the movement of the lid of the vacuum drying tank. There is a difference in height between the front and rear of the hanger 61a, and the basket B in the suspended state is slanted to improve drainage. This basket B
Has a rectangular shape or a round shape corresponding to the shape of the cleaning object, and is formed mainly of a wire mesh so that the cleaning liquid can easily pass through.

Next, a specific procedure of cleaning by the above-mentioned cleaning machine will be described with reference to FIG. The entrance shutter 51 is opened and the basket B is introduced into the clean box 3. Then, the first transporting means 16 suspends the basket B in the cleaning tank 11 so that pure water having a set temperature of 50 ° C. in which 0.15% by weight of the surfactant is mixed is circulated in the tank. While immersed in this pure water containing a surfactant, the basket B is moved up and down to perform ultrasonic cleaning.

The basket B pulled up from the cleaning tank 11 is suspended in the first rinse tank 11. The pure water in the first rinse tank 11 is circulated at a preset temperature of 40 ° C., which has overflowed from the subsequent stage, so that the cleaning liquid brought in from the cleaning tank 11 is washed away and ultrasonic cleaning is performed.

The basket B pulled up from the first rinse tank 12 is suspended in the second rinse tank 13. Second
The pure water in the rinse tank 13 is circulated in the tank at a set temperature of 40 ° C. while supplying fresh pure water that had overflowed from the subsequent stage. Therefore, a higher-purity rinse than that of the first rinsing tank 12 in the previous stage is performed, and ultrasonic waves are applied.

The basket B pulled up from the second rinse tank 13 is suspended in the final third rinse tank 14. The pure water in the third rinse tank 14 is heated to a set temperature of 80 ° C. while supplying new pure water. Final rinsing is performed by dipping in pure water that has high flowability and high purity at high temperature. After the final rinse, it is required to drain as much as possible. Therefore, the higher the temperature of pure water, the better the drainage. Further, the pulling speed from the second rinse tank 13 is set to 12
By limiting to within mm / sec, the surface tension acts on the pure water on the surface of the cleaning product, and the water droplets to be left are pulled down by the surface tension. As a result, the amount of pure water remaining on the surface of the washed object is reduced, and the subsequent drying can be performed quickly.

The basket B pulled up from the third rinse tank 14 is placed in the first hot air drying tank 21 and the lid is closed. Clean hot air of 90 ° C. is blown out and circulates in the first hot air drying tank 21, and the basket B exposed to this hot air is rocking. Due to the rocking, hot air spreads over a wide range of the object to be heated and the pure water remaining on the surface is evaporated.

The basket B heated in the first hot air drying tank 21 is placed in the first vacuum drying tank 22 and the lid is closed. The first vacuum drying furnace 22 draws a vacuum up to 15 torr for 40 to 50 seconds and vaporizes pure water in a boiling state. Therefore, it is difficult to form water droplets and stains due to impurities are suppressed. During the 40 to 50 seconds, the cleaning material in the basket B is cooled to about 35 ° C.

The first hot air drying tank 21 and the first vacuum drying tank 22
In many cases, the drying by the set of No. 2 is sufficient, but in order to perform the drying quickly and at a low temperature, the drying is further performed by adding the set of the second hot air drying tank 23 and the second vacuum drying tank 24.

The basket B pulled up from the first vacuum drying tank 22 is placed in the second hot air drying tank 23 and the lid is closed. Clean hot air of 50 ° C. is blown out and circulated in the second hot air drying tank 23, and the remaining pure water is heated and evaporated.

The basket B heated in the second hot air drying tank 23 is placed in the second vacuum drying tank 24 and the lid is closed. The second vacuum drying furnace 24 is also evacuated to 15 torr for 40 to 50 seconds. During the 40 to 50 seconds, the cleaning material in the basket B is cooled to about 25 ° C. Thus, by combining the first set of hot air drying tanks and vacuum drying tanks and the second set of hot air drying tanks and vacuum drying tanks, short-time drying can be realized, and spots due to water drop drying are almost eliminated. Further, the temperature of the washed product after drying is also lowered to an appropriate temperature, and there is no problem in post-treatment.

[0041]

The cleaning machine of the present invention is basically an ultrasonic cleaning using pure water, but it prevents the multi-stage rinse tank from becoming dirty.
By strengthening the rinsing power at the latter stage, the cleaning power is improved, and the cleaning power is comparable to that of a solvent, and it can also be used as a post CFC cleaning machine. In order to use it as a post CFC washing machine, it is beneficial to determine the upper limit of the surfactant and raise the temperature of the final stage rinse tank to limit the speed. In addition, by removing the dirt in the clean box due to the transfer means to each tank and using the transfer means to perform vertical movement in ultrasonic cleaning and controlled lifting at the final stage, the transfer structure can be simplified. can do.

[Brief description of drawings]

FIG. 1 is an overall flow diagram of a washing machine.

FIG. 2 is an overall top view of the washing machine.

FIG. 3 is an overall side view of the washing machine.

FIG. 4 is an operation diagram showing conveyance of a basket containing a wash item.

[Explanation of symbols]

 1 Cleaning Block 2 Drying Block 3 Clean Box 11 Cleaning Tank 12 First Rinse Tank 13 Second Rinse Tank 14 Third Rinse Tank 16 First Transfer Means 21 First Hot Air Drying Tank 22 First Vacuum Drying Tank 23 Second Hot Air Drying Tank 24 Second Vacuum Drying Tank 26 Second Conveying Means 37 Ultrasonic Oscillator 61 Hanger Arm 62b Screw Shaft (Elevating Mechanism, Vertical Moving Means) 72, 74 Sliding Mechanism B Basket

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Sasou 1764-1, Kaminaichimukaihara, Chiyoda-cho, Shinji-gun, Ibaraki Sensor Technology Co., Ltd. −604 Sabas Engineering Co., Ltd. (72) Inventor Masaru Arai 1-19-3 Miyakojima Kitamachi, Miyakojima-ku, Osaka City, Osaka Prefecture Denyo Co., Ltd.

Claims (5)

[Claims] 1. A cleaning device comprising a cleaning block for sequentially immersing a basket containing an object to be cleaned, and a drying block for successively drying the object to be cleaned after cleaning, wherein the cleaning block and the drying block are in a common clean box. The cleaning block is a cleaning tank of pure water containing a surfactant,
The rinse block has two or more stages of rinse water in which pure water overflowing from the latter stage to the former stage is stored such that the temperature of the last stage pure water becomes higher than the high temperature of pure water of the preceding stage, and each rinse block other than the last stage. The basket in the tank is supported movably up and down, an ultrasonic oscillator is provided in each of these tanks, the drying block has a hot air drying tank with an opening and closing lid, and a vacuum drying tank with an opening and closing lid, A washing machine provided with a transporting means for carrying a basket containing the washings into and out of each of the tanks and carrying the basket to the next tank. 2. The cleaning machine according to claim 1, wherein the pure water in the cleaning tank of the cleaning block contains a surfactant in an amount of 0.2% by weight or less based on the pure water. 3. The cleaning machine according to claim 1, wherein the temperature of the pure water in the rinse tank at the last stage of the cleaning block is set to 70 ° C. or higher, and the basket lifting speed is set to 12 mm / sec or lower. 4. The means for transporting, wherein the number of hang arms for suspending the basket is set to be one more than the number of tanks in the clean box so that the hang arms can be moved up and down and the hang arms are tanks. 2. The washing machine according to claim 1, further comprising means for slidable by the arrangement pitch of 1. outside the clean box. 5. The washing machine according to claim 4, wherein the hang arm is provided so as to be vertically movable for each tank.