JP2005324177A - Method and apparatus for cleaning and drying - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean and dry electronic parts and precision machinery parts and a resin container housing these parts for conveying and storing in a short time, make a whole cleaning and drying apparatus compact and remarkably reduce cleaning and drying time compared with conventional methods. <P>SOLUTION: In a drying process for electronic parts and precision machinery parts after cleaning, the drying by draining and dehydration is conducted by introducing air with rotating shock waves at the intake side and suctioning air at the exhaust side and by uniformly irradiating a housing container with shock waves which are diffused from an air jet nozzle with rotating wave motion after cleaning the housing container, and the housing container conducts cleaning and drying these parts in a shorter time than in the past. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cleaning / drying method and a cleaning / drying apparatus for cleaning and drying a mechanical / electrical component and its component storage container (hereinafter simply referred to as “storage container”).

  Electrical parts, precision machine parts, etc. are contaminated with oil, particles, etc., and products assembled using these contaminated parts adversely affect their quality. It is necessary to remove particles and maintain a clean state.

  In addition, in order to transport and store these electrical parts, precision machine parts, etc., storage containers (tray) made mainly of resin that store these parts, etc. may also be contaminated by particle adhesion in the manufacturing stage. Alternatively, by storing and using electrical parts, precision machine parts, etc. in these storage containers, contaminants may adhere to the storage containers during handling.

If these storage containers are contaminated, there is a high possibility that particles from the storage containers will reattach to the electrical parts, precision machine parts, etc., and become contaminated.
Therefore, in order to solve these problems, electrical parts, precision machine parts, etc. are cleaned and dried for removing contaminants including degreasing, and the storage container is dipped in water or sprayed with cleaning water, and then dried by draining and dewatering. Products made by assembling these parts, such as hard disks, are maintained at a high quality level by always using these electrical parts, precision machine parts, etc. and storage containers for storing them. .

Further, in the invention of “Mechanical parts cleaning and drying apparatus” of Patent Document 1 below, cleaning water is sprayed onto the mechanical parts to inject cleaning water, and compressed air is blown onto the mechanical parts adjacent to the cleaning water jetting machine so as to remain. Compressed air blowing that blows away cleaning water, and cleaning and drying of machine parts that are dried by blowing hot air to the machine parts that are provided adjacent to the compressed air blowing mechanism and in the reciprocating feed direction and blown away residual cleaning water. The device is described.
JP-A-11-239767

Conventionally, these electric parts, precision machine parts and the like have been degreased and washed with trichloroethylene or the like as washing and drying, and substitution drying with alcohol or the like has been performed manually.
Further, as shown in FIG. 5, the storage container 1 is placed on the belt conveyor 2 as a storage container washing and drying device, and pure water is sprayed in several stages from a jet nozzle (not shown), that is, primary using regenerated pure water. By performing spray cleaning consisting of cleaning and secondary cleaning (finish cleaning) with ultrapure water, then generating compressed air from the blower and spraying it onto the storage container 1 by the upper and lower air nozzles 3 and 4 respectively. Washing and drying are performed through a series of steps of draining and drying, followed by hot air drying at a temperature of 50C to 55C. Further, instead of spray cleaning as another cleaning method, as shown in FIG. 6, for example, cleaning is performed by immersing in a cleaning tank (1) 5 and a cleaning tank (2) 6 of an ultrasonic water cleaning tank, and further a rinsing tank. 7 is performed.

  However, in the conventional system in which the storage container 1 of parts is placed on the belt conveyor 2 and horizontally transported, the compressed air generated by the blower is sprayed in several stages by the upper and lower air nozzles 3 and 4. In the draining and dewatering drying method, it is quite difficult to remove the cleaning liquid by simply scooping and moving the water as the cleaning liquid adhering to the storage container 1 on the surface of the storage container 1. This tendency increases as the water droplets become smaller, and it is almost impossible to scrape the cleaning water that has accumulated in the deep recesses above the storage container 1 from these recesses.

  Accordingly, draining and dewatering and drying by the upper air nozzle 3 requires a large amount of air, and a deep recess in the storage container 1 makes it difficult to drain the washing water, so that the draining and dewatering and drying area is also a long distance. In addition, the exclusive area of the draining and dehydrating apparatus has to be larger than that of the cleaning apparatus.

For this reason, it is not uncommon for conventional storage container cleaning and drying apparatuses to reach a length of about 10 m, and the amount of cleaning and drying per unit time cannot be made relatively large.
Therefore, the initial cost and running cost due to capital investment are also expensive, the cleaning cost of the storage container is increased, and the merit of cleaning and recycling the storage container is small.

Means for Solving the Problems and Effects of the Invention

In order to solve such a problem, the present invention performs the following cleaning, draining and dewatering drying of the storage container.
After the storage container is immersed in water or washed with water jet, it is drained and dehydrated and dried by a shock wave accompanied by a rotating wave. By the shock wave accompanied by this rotational wave, the water remaining as small water droplets on the surface of the storage container can be surely shaken off in the conventional draining and dewatering process, and the washing water accumulated in the deep dent is scraped off. Draining and dewatering can be easily performed without the stagnation of the washing water scooping around the surface of the storage container as in the case of using the air nozzle according to the method.

  In addition, since high efficiency is obtained by strong wave motion, processing can be performed with less air consumption. Since the present invention has these effects, draining and dehydration drying can be performed in a much shorter time than in the prior art. In addition, the draining dewatering and drying apparatus can be considerably shortened. Therefore, the area occupied by the draining and dehydrating apparatus can be significantly reduced.

  In order to clean and dry the storage container, when the storage container is horizontally transported, a shock wave generating air nozzle with rotational waves is disposed at least on the upper side of the storage container, so that the storage container collects in a deep recess. The washed water can be easily scraped off. With the conventional method of spraying with an air nozzle, it is almost impossible to eliminate the washing water present in such a place.

  Also, after the storage container is immersed in water or washed with water jets, the tip of the shock wave generating air nozzle with rotational waves for draining and drying is made variable according to the thickness of the storage container, and the tip of the shock wave generating air nozzle with rotational waves The interval between the storage containers is always 5 mm to 20 mm. By performing such a treatment, it is possible to increase the efficiency of scraping off the cleaning water accumulated in a deep recess. Accordingly, it is possible to easily cope with a storage container having any thickness.

  When drying mechanical parts and / or electrical parts after cleaning, the air suction side introduces air with rotational shock waves and the exhaust side sucks air to dry the cleaned mechanical parts and / or electrical parts. It is characterized by. The cleaning fluid in the blind screw hole is also scraped by the rotating wave shock wave, and the blind screw hole part is completely dried by the synergistic effect of the compressed and heated air and suction drying by the high pressure blower ejected from the rotating wave shock wave nozzle. Can do.

  In the drying after the cleaning of the mechanical part and / or the electrical part, the basket storing the mechanical part and / or the electrical part is rotated at a low speed. By adopting such means, the drying efficiency can be further increased, and the mechanical parts and electrical parts to be dried stored in the basket can be evenly dried.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a diagram showing an embodiment of a first cleaning / drying apparatus according to the present invention. The storage container 1 is placed on the belt conveyor 2 and spray cleaning with pure water is performed in the spray cleaning tank 3. First, primary cleaning with regenerated pure water once used is performed. This pure water is collected in the recovery tank 8 from the pure water used in the secondary cleaning in the next stage, pumped by the pump 9, and used as regenerated pure water through the filter 10 and pre-cleaned. Next, spray cleaning with ultrapure water manufactured by the pure water manufacturing apparatus 11 is performed, which is final cleaning (secondary cleaning).

  After the washing, the drying process is started in the draining / drying tank 4 in the next stage. In the drying step, the pure water remaining in the storage container 1 that has been cleaned is drained and dried by the upper air nozzle (rotational wave) 6-1 accompanied by a shock wave having a rotational wave. In particular, it is difficult to remove the residual pure water present in the recessed portion, but the upper air nozzle (rotational wave) 6-1 is removed by scraping the pure water from the depression by a strong rotational wave.

  The upper air nozzle (rotational wave) 6-1 rotates at a high speed of 1200 to 1600 RPM, and the wind speed ejected from the nozzle reaches 150 m / sec. The powerful wave generated by the high-speed vibration of the nozzle tip is stored. Since it reaches the dents, protrusions, grooves, gaps, etc. on the surface of the container, it exhibits an excellent effect in draining and draining uneven objects and three-dimensional objects. Further, since the upper air nozzle (rotational wave) 6-1 is ejected with the compression heat from the high pressure blower, the temperature of the ejected air rises to about 42 ° C., and the drying effect is further improved.

In general, it is difficult to drain the wash water from the deep pits of the storage container, and in the present invention, the wash water in the dents is scraped out by a shock wave caused by a rotating wave. Since powerful waves reach every corner, it is more effective for draining, dewatering, cleaning, etc. than the conventional method. Since the air ejected from the small-diameter hole is diffused by rotation or swinging vibration, a wide range of processing can be performed with less air (or liquid) consumption than the conventional steady flow method.
Further, since the remaining pure water is dropped and removed by gravity under the storage container 1, the lower air nozzle 7 of a normal high blow nozzle can be sufficiently drained and dried.

  After the draining and drying, the hot air drying tank 5 blows hot air of about 50 to 55 ° C. onto the storage container 1 to perform the final drying. In this drying step, pure water remaining in a minute amount on the surface of the storage container 1 is removed by evaporation. After the hot air drying is completed, the storage container 1 is taken out and stored in a stocker or the like, and a series of washing and drying steps is completed. This washing and drying is continuously performed in a single-wafer type in the belt conveyor conveying method. In addition to this, there is also a method in which a dedicated basket is used as a method for washing and drying the storage container and batch processing is performed.

  FIG. 2 is a diagram showing an embodiment of a second cleaning / drying apparatus according to the present invention. As a cleaning method for the storage container 1, a cleaning tank (1) 12, a cleaning tank (2) 13 and a rinsing tank 14 are provided, and cleaning by water immersion is performed. The cleaning tank (1) 12 performs primary cleaning using regenerated pure water, and the cleaning tank (2) 13 performs secondary cleaning using ultrapure water. Thereafter, in the rinsing tank 14, rinsing for finishing is performed using ultrapure water, and the cleaning process is completed. In addition, ultrasonic cleaning in the cleaning tank (1) 12 and the cleaning tank (2) 13 is also an effective means for cleaning. Subsequent drying steps are the same as those in the first cleaning / drying apparatus.

  FIG. 3 is a diagram showing an embodiment of a first drying apparatus according to the present invention. The rotating wave nozzle 16 is disposed in the upper part of the drying tank 15, and a structure having a function that can be sufficiently exhausted by a suction pump (not shown) in the lower part of the drying tank 15 is employed. The basket 17 containing the machine parts and / or electrical parts after washing is placed on the slat 18 in the drying tank 15 and the rotating wave nozzle 16 is operated, and at the same time, the suction pump is also operated from the lower part to perform suction drying. Also let me do.

  The cleaning liquid staying in the recessed portion of the machine part, particularly the blind hole portion is scraped out by the rotating shock wave generated from the rotating wave nozzle 16, and the air accompanied by the compression heat generated by the high pressure blower is ejected from the rotating wave nozzle 16. Therefore, a strong drying effect can be obtained by the synergistic effect with the hot air and suction drying, and in the blind hole portion or the blind tap screw portion provided in the machine parts or the like which have been conventionally impossible or difficult. It is possible to sufficiently dry and remove the cleaning liquid present in the substrate.

  FIG. 4 is a diagram showing an embodiment of a second drying apparatus according to the present invention. The embodiment of the first drying apparatus of the present invention is further provided with a function capable of rotating the basket 17 containing mechanical parts and / or electrical parts by the rotating shaft 19. As a result, the shock wave from the rotating wave nozzle 16 can be evenly applied to the mechanical parts and / or electrical parts in the basket 17, and conventionally, it is difficult to remove the cleaning liquid in the recess recessed in the upper part in suction drying. As a result, the drying effect is further enhanced and the certainty of drying is further improved.

  The cleaning / drying method according to the present invention can be used not only in mechanical parts and electrical parts but also in various industries such as medical equipment, semiconductors and chemical industries.

The figure which shows embodiment of the 1st washing-drying apparatus of this invention. The figure which shows embodiment of the 2nd washing-drying apparatus of this invention. The figure which shows embodiment of the 1st drying apparatus of this invention. The figure which shows embodiment of the 2nd drying apparatus of this invention. The figure which shows the structure of the conventional 1st washing | cleaning drying apparatus. The figure which shows the structure of the conventional 2nd washing-drying apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage container 2 Belt conveyor 3 Spray washing tank 4 Draining drying tank 5 Hot air drying tank 6-1 Upper air nozzle (rotation wave)
6-2 Upper air nozzle 7 Lower air nozzle 8 Collection tank 9 Pump 10 Filter 11 Pure water production device 12 Cleaning tank (1)
13 Washing tank (2)
14 Rinsing tank 15 Drying tank 16 Rotating wave nozzle 17 Basket 18 Snowboard 19 Rotating shaft

Claims (6)

  A method for washing and drying a storage container, wherein the storage container is subjected to water immersion or water jet cleaning and then drained and dehydrated and dried by a shock wave accompanied by a rotating wave.   In order to wash and dry the storage container, when the storage container is horizontally disposed and transported, a shock wave generating air nozzle with rotational waves is disposed at least on the upper side of the storage container, and the cleaning and drying apparatus for the storage container is characterized in that .   After the storage container is immersed in water or washed with water jet, the tip of the shock wave generating air nozzle with rotational waves for draining and dewatering drying is made variable according to the thickness of the storage container, and the tip of the shock wave generating air nozzle with rotational waves is stored The apparatus for cleaning and drying a storage container according to claim 2, wherein the interval between the containers is always 5 mm to 20 mm.   In the drying after washing machine parts and / or electrical parts, the air suction side into the drying tank introduces air accompanied by a rotational wave shock wave, and the exhaust side sucks air. And / or a method for drying electrical components.   In drying after washing mechanical parts and / or electrical parts, the air suction side into the drying tank has means for introducing air accompanied by shock waves due to rotational waves, and the exhaust side has means for sucking air. Machine parts and / or electrical parts drying equipment after washing.   6. The machine part after washing according to claim 5, wherein in the drying after washing the machine part and / or the electric part, the basket for storing the machine part and / or the electric part in the drying tank is rotated at a low speed. And / or drying equipment for electrical components.

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