JPH0612468U - Washing / drying device - Google Patents

Abstract

(57) [Summary] [Purpose] When the product after plating or other treatment is washed with pure water and dried, it is drained in a single hour to prevent spots from forming on the product surface. [Constitution] The cleaning device 15 has a specific resistance of 5.0 × 10 ⁵ Ω
The component 8 is washed with pure water 16 of cm or more, and thereafter, a wind having a small air flux cross-sectional area and a high wind speed is applied to the component 8 from the first nozzle 3 of the first drying device to drain water. After that, the water slightly remaining on the surface of the component 8 is removed by the second drying device.
Air having a larger air flux cross-sectional area and a lower air velocity than the first nozzle 3 is applied to the component 8 to finish drying.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cleaning / drying apparatus.

[0002]

[Prior art and its problems]

 In recent years, with the sophistication and diversification of surface treatment products such as plating and alumite, if there are slight stains or stains on the surface of the product after treatment, subsequent painting, printing, bonding, mounting of electronic parts, etc. Causes a defect in the product. Therefore, it is necessary to clean the surface by cleaning the processed product. In addition, the slight dry spots and stains on the product surface after washing and drying can cause product defects, so drying the product after washing is an extremely important process.

Therefore, an air drying method has been devised in which the treated product is washed with pure water such as ion-exchanged water, and then the water adhering to the product is blown away by air to be dried.

As an example of the air drying method, in Japanese Utility Model Publication No. 62-46137, a high pressure blower is used to drain water in a state in which a treated product is attached to a jig (a hook rack), and a tip of a gas ejection nozzle is used. There is disclosed a device (a wind-type low-temperature drainer) which blows water drops by applying a large volume of low-temperature air to a product by forming a flat and oblong taper.

However, generally, the shape of the product is three-dimensionally complicated, and there are many cases where there is a blind hole for coupling with other parts or a box shape. For example, FIGS. 6 and 7 show a watch frame 8 which is a plated product. When the product 8 is held so that the portion 8g is located downward during water washing, the lower end flat surface portion 8g, blind holes 8a to 8e, and slit-shaped products are provided. Water easily collects in the grooves 8f and 8h. When the wind is applied perpendicularly to Fig. 7, the wind does not act effectively on these parts, so that water once accumulated on these parts is difficult to dry.

According to an experiment, in the above-mentioned conventional wind power type low temperature water draining dryer, spraying was performed for 10 minutes under the condition that the distance from the nozzle to the part was 25 cm, the wind speed was 3 to 5 m / s, and the air flux cross sectional area was 100 cm ² or more. However, it was impossible to dry the blind holes of the product, the slit-shaped grooves, and the water drops on the flat bottom surface.

[0007] It takes one hour or more to dry the entire product including the above-mentioned water-difficult part with this apparatus, which may reduce the productivity or increase the size of the apparatus. In addition, even if the product is washed with high-purity ion-exchanged water, various dusts and mist in the air are taken into the water on the product surface during drying, and the purity of the water decreases and it becomes a stain after drying. As a result, the decorative value of the appearance is damaged and the value as a product is lost. In addition, the water remaining in the blind holes will ooze out later and cause defects in the subsequent process.

On the other hand, there is a method of washing and drying the product after plating with a draining desiccant in which an organic solvent such as Freon-113, isopropyl alcohol, trichloroethane and the like and a surfactant are mixed. According to this method, the product after washing can be completely dried and does not cause drying stains. Particularly, when CFC-113 is used, it is directly harmless to humans. However, this method has a high running cost, especially when isopropyl alcohol and trichloroethane are used, there are problems in safety such as fire and effects on the human body, and CFC-113 and trichloroethane cause ozone layer destruction. It had the drawback of adversely affecting the global environment.

The present invention solves the above-mentioned drawbacks and makes it possible to dry the product in a short time when washing and drying the product using pure water without using CFCs, and does not cause stains or the like. The purpose is to do so.

[0010]

[Means for Solving the Problems]

In order to achieve the above object, the cleaning / drying apparatus according to the present invention comprises a cleaning apparatus using pure water, a first drying apparatus, a second drying apparatus, a cleaning apparatus for parts, and a second drying apparatus via the first drying apparatus. The first drying device is provided so as to be able to face the component, has a small nozzle opening area, and jets air with a high wind speed, and a drive that drives the nozzle so that the air hits the entire component. The second drying device has an air blower that applies air whose wind speed is lower than that of the first nozzle to all parts, and the specific resistance of pure water used in the cleaning device is 5.0 ×. It is characterized by being 10 ⁵ Ω · cm or more.

[0011]

[Action]

After washing the parts after plating etc. with pure water, the narrow opening of the nozzle of the No. 1 drying device applies air with a high wind speed to the parts, and moving the nozzle makes it easier for water to accumulate in the parts. Blow away most of the water that has adhered to the parts, including those that are difficult to blow off. After that, the water slightly remaining on the surface of the component is continuously blown by the blowing device of the second drying device to blow a wind having a smaller wind speed than the first drying device to the entire component for finish drying. This allows parts with complicated shapes to be completely drained and dried in a short time. In particular, since it is cleaned with pure water having a specific resistance value of 5.0 × 10 ⁵ Ω · cm or more, impurities do not adhere to the parts and the parts can be dried in a shorter time. It reduces the time when dust and mist are mixed in the water, and eliminates the generation of stains on the surface of the parts.

[0012]

【Example】

 An example of cleaning the parts after plating processing by the hooking method with this device and air drying will be described. The apparatus of this embodiment is of an elevator type, and as will be described later, the jig conveying direction and the air directions of the first and second drying devices form a right angle. As shown in FIG. 2, the jig for mounting the plated component 8 is composed of a rack 7 on which the component 8 is hooked and a hanger 14 that suspends the rack 7. The transport device is configured by a guide bar 6 that suspends the hanger 14, and a moving bar 12 that has a claw that can engage with the hanger 14 and that can move to the right in FIG. Therefore, the hanger 14 can move on the guide bar 6, and the rack 7 is transported to the right in FIG. 2 via the hanger 14. The rack 7 is swingable with respect to the hanger 14, and the swinging direction is perpendicular to the rack 7 transport direction. The component 8 is injection-molded with a thermoplastic resin in a watch frame, is attached to the rack 7, is transported under the guide bar 6, and is sequentially subjected to wet plating such as copper, nickel and brass plating. It

After that, the rack 7 is conveyed to the right in FIG. 2 via the hanger 14 through a washing device (not shown) using clean water, and is washed by the washing device 15 using pure water 16 described later. . After that, the wetted parts 8 are dried through a first-stage drying area 1 (first drying device) and a second-stage drying area 2 (second drying device) which will be described later. The shape of the component 8 is three-dimensionally complicated, and it often has a blind hole for coupling with other components or has a box shape, which makes it difficult to dry the water once accumulated. The cleaning device 15 contains pure water 16, for example, ion-exchanged water. In the case of ion-exchanged water, the specific resistance is preferably 8.0 × 10 ⁵ Ω · cm or more.

In the first-stage drying area 1 downstream of the cleaning device 15 in the transport direction of the rack 7, the first area for air jetting has a small air flux cross-sectional area and jets high-speed air. One nozzle (nozzle) 3 is provided.

In the first-stage drying area, a compressor (not shown) is placed below the transport path, and air is supplied to the first nozzle 3 by a hose. As shown in FIG. 1, a total of 14 first nozzles 7, each of which is 7 on one side, are installed in a metal movable device, and the first nozzles 3 on both sides move up and down in parallel at a constant speed by a first driving device (not shown). I am making a round trip. As shown in FIG. 4, the nozzle 3a of the first nozzle 3 has a diameter of about 1 to 2 mm, and each nozzle has 2. Compressor Karae Ah is supplied so that the pressure 5kg / cm ² ~4kg / cm ² is applied. Thereby, the air flux cross-sectional area is set to ² to 40 cm ² and the wind speed is set to 15 to 40 m / s in the range of 5 to 40 cm from the tip of the first nozzle 3.

Further, in the second-stage drying area 2, as compared with the area 1, at a position separated from each other by the same distance from each other, the air having a larger air flux cross-sectional area and a smaller wind speed is ejected. The second nozzle (blower) 4 is provided. As shown in FIG. 5, the size of the ejection port of the second nozzle 4 is about 100 × 10 mm, so that the air flux cross-sectional area is 40 to 300 cm ² in the range of 5 to 40 cm from the tip of the second nozzle 4. The wind speed is set to be 2 to 15 m / s. In the drying area 2 of the second stage, as shown in FIG. 2, two 5.5 kw blowers 10 are placed below the conveying path, and warm air is supplied to the second nozzle 4 by a flexible hose. The wind is circulated by the circulator 11. The air blown from the second nozzle 4 has a temperature of about 50 to 60 ° C., and at the position of the component 8, most of the air flux area has a wind speed of about 5 to 8 m / s. This is to apply warm air having a wind pressure much weaker than that in the first area to the entire product and evaporate and dry the remaining water by blowing air and warm air. In this example, a total of 60 second nozzles 4 are installed in the area 2, and each nozzle is located at that position, with the horizontal direction as the center, as shown in FIG. (Not shown) allows the product to swing up and down by 20 to 50 °, so that all products are exposed to air. The facing second nozzles 4 are not oriented in the same direction, and the angles for vertical movement are changed in various ways, so that it is possible to blow air of any angle to the component 8 at the same time. Further, a pair of guide rails 13 is provided in the lower part of the drying area 2 to prevent the rack 7 from swinging in the direction perpendicular to the carrying direction.

Next, the operation will be described. When the rack 7 is positioned on the cleaning device 15 as shown in FIG. 2, the bar 6a, which is a part of the guide bar 6, descends, the rack 7 enters the cleaning device 15, and the component 8 is cleaned with pure water 16. To be washed. After that, the bar 6a moves up and the moving bar 12 moves to move the rack 7 onto the drying area 1, and the bar 6a moves down to move the rack 7 into the drying area 1 so that the nozzle 3 moves up and down and the rack 7 is pulled. A wind is blown on the hung part 8.

The jet air has a cross-sectional area of the air flux of which the wind speed exceeds 20 m / s at the product position is about 10 to 20 cm ² . In view of the size of the processed product (about 30 cm × 30 cm × 10 cm), strong air is applied in spots, and the nozzle moves to cover the entire area of the part 8 in sequence, and the surface water is blown off. Be done. In fact, about 90 to 98% of the water adhering to the component 8 is removed by air blowing for 1 minute in this area. At this time, since the nozzles 3 on both sides move up and down in a parallel state, winds parallel to each other strike the rack 7 to cancel the forces exerted on the rack 7, and the rack 7 moves in the direction of the wind of the nozzle 3. Does not swing so much that the component 8 does not hit or drop the nozzle 3.

After that, the bar 6a rises, the hanger 14 that suspends the rack 7 moves and moves onto the bar 6b, and the rack 7 moves into the drying area 2 of the second stage.

In the drying area 2, the component 8 is air-blasted for about 5 minutes, and when the component 8 comes out of the area 2, even a component having a complicated shape is completely dried. At this time, the directions of the facing nozzles do not match, and the resultant force of the wind in various directions is applied to the rack 7, which causes the rack 7 to move in the air injection direction, that is, in the transport direction of the rack 7 and in the vertical direction. Try to rock. However, the rack 7 is restricted by the guide rails 13 from swinging in the direction perpendicular to the carrying direction, and the component 8 does not come into contact with the second nozzle 4 or drop.

[0021] According to the present invention, the air having a strong air flux in the first area tends to collect water such as blind holes, box shapes, and slit shapes of parts, and it is difficult to dry it by only heating or weak air blowing. 90-98% of the adhered water can be wiped off even at the shape. After that, it is easy to evaporate and dry the water by weak air blowing and heating, and the parts can be completely dried in the second area.

Next, Table 1 shows the results of comparison of the drying performance between the device according to the present invention and a device combining a conventional wind-type low-temperature drainer and a box-type dryer. In the above conventional apparatus, the box type dryer is a constant temperature bath maintained at a temperature of 60 ° C, and the parts are dried by passing through a wind type low temperature draining dryer and a box type dryer in this order. Parts of both devices were first washed with pure water such as ion-exchanged water or distilled water, and then dried.

[0023]

[Table 1]

According to the present invention, it is possible to completely dry the parts, including water in places where it is difficult to remove water, such as blind holes and slit shapes, and to dry in a short time of T = 10 minutes. Further, as shown in Table 1, according to the present invention, when ion-exchanged water is used as pure water, stains are generated in the component if the specific resistance of the ion-exchanged water is 8.0 × 10 ⁵ Ω · cm or more. On the other hand, in the parts, if the specific resistance of the ion-exchanged water was 1.0 × 10 ⁶ Ω · cm or more, no stain was generated. Further, when distilled water was used as pure water, no stain was generated if the specific resistance of the distilled water was 5.0 × 10 ⁵ Ω · cm or more for both parts. On the other hand, when conventional equipment takes time to dry, dust and mist are taken into the water on the product surface during drying, and the specific resistance of ion-exchanged water is 2.0 × 10 ⁶ Ω · cm. Also stains occurred.

The present invention is not limited to this embodiment. For example, in the drying area 1 of the first stage, the nozzles 3 face each other in parallel and reciprocate up and down, but the nozzles 3 on both sides are parallel. May not be opposed to each other, and may be vertically displaced. Further, in the drying area 1, the nozzles may be vertically swung at their positions like the drying area 2. At this time, since the jig swings greatly in the air blowing direction in the drying area 1, a regulation means such as the drying area 2 may be provided in the drying area 1 as well.

Further, in the drying area of the first stage, a jig for holding the component when air is applied to the component may be moved in the transport direction in the drying area 1.

The air blown onto the surface of the component by the drying area 2 does not have to be warm air. Further, the air blower in the drying area 2 may be a fixed duct instead of the oscillating nozzle as in the present embodiment, or may be a fan provided in the box and blowing air over the entire surface of the component. Good.

[0028]

[Effect of device]

According to the present invention, since high-pure water having a specific resistance value of 5.0 × 10 ⁵ Ω · cm or more is used for cleaning, impurities do not adhere to the parts, and the parts are attached after cleaning. The resulting water can be completely dried in a short time, which reduces the chances of dust and mist adhering to the component surface during drying, and prevents stains on the component surface, contributing to quality improvement. In addition, it is possible to completely dry water including parts such as blind holes and slits in parts where it is difficult to remove water. Furthermore, since the components can be dried in a short time, the component transport path for drying can be shortened, and the drying device can be downsized.

Further, in comparison with the conventional method of washing and drying the product after plating using an organic solvent such as Freon-113, isopropyl alcohol and trichloroethane and a draining desiccant in which a surfactant is mixed, There are no problems in terms of safety such as fires and effects on the human body, running costs are low, and there is the advantage that, unlike CFC-113 and trichloroethane, they do not adversely affect the global environment such as ozone layer depletion.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a partially sectional front view showing an embodiment of the present invention.

FIG. 3 is a sectional view showing an embodiment of the present invention.

FIG. 4 is a view showing a first nozzle according to an embodiment of the present invention.

FIG. 5 is a view showing a second nozzle according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of the components of one embodiment of the present invention.

FIG. 7 is a partial sectional front view of a component according to an embodiment of the present invention.

[Explanation of symbols]

 1 1st drying device 2 2nd drying device 3 Nozzle 4 Blower device 6,12 Conveyor device 8 Parts 15 Cleaning device 16 Pure water

Claims (1)

[Scope of utility model registration request] 1. A cleaning device using pure water, a first drying device, a second drying device, and a conveying device for passing parts through the cleaning device and the first drying device through the second drying device. The first drying device includes a nozzle that is provided so as to be able to face the component and that ejects air with a small nozzle opening area and a high wind speed, and a drive device that drives the nozzle so that the air hits the entire component. The second drying device has a blowing device that applies air having a wind speed lower than that of the nozzle to the entire component, and the specific resistance of pure water used in the cleaning device is 5.0 × 10 ^5.
A washing / drying device characterized in that it is Ω · cm or more.