JP2868959B2 - Work drying method and drying apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for drying a work to which a liquid such as a cleaning liquid has adhered.

[0002]

2. Description of the Related Art Work such as precision mechanical parts and electronic parts are processed, and then subjected to processing such as cleaning and rinsing, and thereafter, the work is subjected to a drying treatment to dry the surface and the inside of the work. By the way, as a method of drying the work to which the cleaning liquid or the like has adhered, the work is accommodated in a drying tank having an open top, and in this state, air having a predetermined air pressure is applied to the work by an air blow nozzle. Spraying a part of the liquid adhering to the work, and then supplying hot air into the drying tank by a hot air duct to evaporate the liquid scattered by the air and the liquid remaining on the work. The work is thereby dried.

However, in the above-described method for drying a workpiece, since the upper part of the drying tank is open, when hot air is supplied into the drying tank by a hot air duct, a part of the hot air is discharged from above the drying tank. Would. For this reason, the supply efficiency of the hot air in the drying tank becomes low, and it takes a long time to evaporate the liquid scattered by the air and the liquid remaining on the work and adhering thereto. As a result, there has been a problem that the operation of drying a large number of works requires a great deal of time and labor.

[0004] Since the work is usually accommodated in a drying tank in a state of being placed on the bottom inner surface of a cage-shaped work storage box, when the work is dried, the work storage of the work is performed. The liquid interposed in the portion that comes into contact with the inner surface of the bottom of the box becomes difficult to dry. For this reason, when performing a drying process on the work, it is desired that the contact portion of the work with the inner surface of the bottom of the work storage box be sufficiently dried.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a method and an apparatus for drying a work capable of improving the work efficiency of drying the work. Aim.

Another object of the present invention is to provide a work drying apparatus which can sufficiently dry a contact portion of the work with the bottom inner surface of the work storage box.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for drying a work to which a liquid such as a cleaning liquid has adhered, wherein the work is accommodated in a closed space, and A step of blowing air having a predetermined air pressure on the work to scatter liquid adhering to the work,
A step of supplying hot air to the closed space to evaporate a liquid in the closed space, and a step of sucking vapor in the closed space and discharging the same to the outside. is there.

The present invention also relates to an apparatus for drying a work to which a liquid such as a cleaning liquid has adhered, a tank main body having an opening above and the work being accommodated therein, and an opening of the tank main body being closed. A drying tank formed of a closing member, an air blow nozzle for blowing air having a predetermined air pressure onto the work contained in the drying tank to scatter liquid adhering to the work, and supplying hot air into the drying tank. A hot air supply means for evaporating the liquid in the drying tank; and a discharging means for sucking the vapor in the drying tank and discharging the vapor to the outside.

Further, in the present invention, the air blow nozzle preferably has a cylindrical nozzle body having an outer peripheral surface formed with a discharge port for blowing the air to the work, and an outer peripheral surface inside the nozzle main body. An inner tube having a space formed between the inner tube and the inner surface of the nozzle body, the inner tube having an opening formed in the outer surface, and air supply means for supplying the air into the inner tube. It is characterized by the following.

Further, according to the present invention, the air blow nozzle is provided so as to be movable along the work in a state where the discharge port faces the work accommodated in the drying tank. The discharge port is supported by a moving means for moving the discharge port along the work while facing the work.

Further, according to the present invention, the work is placed in the tank body with the work placed on a bottom inner surface of a cage-shaped work storage box. The suction port is provided on a bottom outer surface of the box so as to be slidably contacted along the work, and the suction port is supported by a moving means that slides along the work on the bottom outer surface of the work storage box. It is.

[0012]

According to the present invention, a work to which a liquid such as a cleaning liquid has adhered is accommodated in a drying tank whose opening is closed by a closing member, and in this state, air having a predetermined air pressure is applied to the work by an air blow nozzle. Spraying the liquid adhering to the workpiece, supplying hot air into the drying tank by hot air supply means to evaporate the liquid in the drying tank, and sucking the vapor in the drying tank by the discharging means to the outside. Since the air is discharged, a part of the hot air supplied into the drying tank can be prevented from being discharged to the outside. For this reason, the supply efficiency of hot air can be increased as compared with the related art, and the time for evaporating the liquid in the drying tank can be shortened.

[0013] Further, as an air blow nozzle, a cylindrical nozzle main body having an outer peripheral surface formed with a discharge port for blowing the air to the work, an outer peripheral surface inside the nozzle main body and an inner peripheral surface of the nozzle main body. An air blow nozzle including an insertion tube having a space formed between the insertion tube and an opening formed in an outer peripheral surface thereof, and air supply means for supplying the air to the inside of the insertion tube was used. In this case, the air supplied to the inside of the insertion tube by the air supply means flows out of the opening, is rectified in the space, and is then discharged from the discharge port of the nozzle body and blown to the work. For this reason, uniform air without discharge unevenness can be discharged from the discharge port and blown onto the work.

Further, the air blow nozzle is provided so as to be movable along the work with a discharge port facing the work accommodated in the drying tank, and the air blow nozzle is provided with the discharge port facing the work. In the case where the air blow nozzle is moved along the upper surface of the work by the moving means, for example, by moving the air blow nozzle along the upper surface of the work in a state where the air is blown from the discharge port, the air is uniformly spread on the upper surface of the work. Can be sprayed.

Further, in the case where the work is placed in the tank body in a state where the work is placed on the bottom inner surface of the cage-shaped work storage box, the suction port of the discharging means is provided on the bottom outer surface of the work storage box for the work. If the suction port is supported by a moving means that slides along the work on the bottom outer surface of the work storage box, the suction port of the discharge means is moved by the moving means. By sliding along the work on the bottom outer surface of the work, the vapor in the drying tank is sucked from the suction port and discharged to the outside, and the work is interposed in a portion of the work which comes into contact with the work inside of the bottom of the work storage box. The liquid is sucked and discharged to the outside.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of a work drying apparatus according to an embodiment of the present invention, in which a part of the work drying apparatus is cut away, FIG. 2 is a left side view, in which part of FIG. 1 is cut out, and FIG. 4 is a detailed view of a portion A in FIG. 1, and FIG. 5 is an overall perspective view of a work storage box.

First, for convenience of explanation, the work storage box H in which the work W to which the cleaning liquid is attached is stored will be described. As shown in FIG.
Are formed in a cage shape by arranging them in a coarse lattice shape, and a flange portion T is formed at each upper end on both sides. The work W is stored in the work storage box H in a state where the work W is placed on the inner surface of the bottom of the work storage box H.

Next, a description will be given of a work drying apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a work drying device, and the drying device 1 includes a drying tank 2 in which a work storage box H in which a work W is stored is stored.

The drying tank 2 includes a box-shaped tank main body 4 having an opening 3 above, and a cover 5 for closing the opening 3. A work storage box H in which the work W is stored is accommodated in the drying tank 2 with both flange portions T supported by the support members 6a and 6b. The upper ends of the support members 6a and 6b penetrate the cover 5 and protrude upward, and the protruding portions are fixed to a support arm 7 disposed above the drying tank 2. Note that the support arm 7 is moved in the vertical direction by a driving device (not shown).

Above the work W stored in the work storage box H, an air blow nozzle 8 for blowing air of a predetermined air pressure is arranged along the upper surface of the work W.

As shown in FIG. 3, the air blow nozzle 8 has a square tubular nozzle body 9. The nozzle body 9 has one corner 10 of the work W inside the drying tank 2. It is horizontally arranged facing the upper surface (FIG. 2
reference). Further, the corner portion 10 is cut out along the axial direction, and thereby the elongated ejection port 11 is formed in the corner portion 10.

As shown in FIG. 3, a cylindrical insertion tube 12 is provided inside the nozzle
And a space is formed between the inner peripheral surface and the inner peripheral surface.
A plurality of through holes 13 penetrating to the inside of the inner tube 12 are formed at predetermined intervals in the axial direction. As shown in FIG. 2, air inflow tubes 13 extend upward from both ends of the intubation tube 12, and one end of a spiral tube 14 is connected to the tip of each air inflow tube 13. ing. The other end of the spiral tube 14 is connected to air supply means (not shown). Air (normal temperature) of a predetermined air pressure is supplied from the air supply means through the spiral tube 14 and the air inflow tube 13 to the insertion tube 12.
Supplied inside.

One end of an elongated support plate 15 is connected to the inside of each air inflow pipe 13.
The other end of 5 penetrates through a slide hole 5a formed in cover 5 and protrudes upward. Support plate 15 and slide hole 5a
A seal member (not shown) is provided between the two. The support arms 7 described above are arranged between the support plates 15 projecting upward, and the upper ends of the support plates 15 are connected by connecting pieces 16 above the support arms 7. A slide member 17 having a concave cross section is fixed to the lower surface of the connecting piece 16, and the slide member 17 is slidably fitted into a guide rail 18 formed on the upper surface of the distal end of the support arm 7. In the fitted state, the slide member 18 is connected to the piston rod 20 of the air cylinder 19 attached to the upper surface of the rear end of the support arm 7. By driving the air cylinder 19 to extend and retract the piston rod 20, the air blow nozzle 8
However, when the discharge port 11 faces the work W, the work W
1 in FIG. 1 in the directions of arrows a and b.

A hot air duct 21 for supplying hot air into the drying tank 2 is disposed inside the drying tank 2. The hot air duct 21 has a rear end projecting outside through the side wall of the tank body 4, and the protruding portion is connected to a hot air supply device (not shown) via a supply pipe 22. On the other hand, the tip of the hot air duct 21 is branched into two, and the branch ducts 21a,
21b, and these branch ducts 21a, 21b
b are opposed to each other with the work W interposed therebetween.
On the side of the branch ducts 21a and 21b facing the work W, there are formed a plurality of ejection ports 23 for ejecting the hot air supplied from the above-described hot air supply device into the hot air duct 21 into the drying tank 2.

Under the work storage box H accommodated in the drying tank 2, a vapor in the drying tank 2 and a cleaning liquid interposed in a portion of the work W which comes into contact with the bottom inner surface of the work storage box H are sucked. And a suction nozzle 24 for discharging to the outside. The suction nozzle 24 has an elongated suction port 25 extending in the horizontal direction at the upper end thereof, and the tip of the suction port 25 slidably abuts the outer surface of the bottom of the work storage box H. Further, one end of a suction hose 26 is connected to the suction nozzle 24, and the other end of the suction hose 26 penetrates the side wall of the tank body 4 and protrudes to the outside, and is thereafter connected to a suction pump (not shown). . The suction nozzle 24 configured as described above is slidably supported by a guide mechanism 27 provided at the bottom of the tank main body 4. The guide mechanism 27 is driven by a driving device (not shown) to thereby form a suction port 25. The suction nozzle 24 reciprocates along the work W in a state where the suction nozzle 24 is in contact with the bottom outer surface of the work storage box H.

Next, a method for drying the work W stored in the drying tank 2 will be described. First, air of a predetermined air pressure is supplied from the air supply means to the inside of the insertion tube 12 via the spiral tube 14 and the air inflow tube 13. Then, the air supplied into the inner tube 12 flows out of the through hole 13, is rectified in the space K, and then is discharged from the discharge port 11. By rectifying the air in the space K in this manner, uniform air without discharge unevenness is blown from the discharge port 11 to the work W, and a part of the cleaning liquid attached to the work W is scattered. While the air is being blown onto the work W, the air cylinder 19 is driven so that the air blow nozzle 8 reciprocates along the work W. Air can be evenly blown on the upper surface of the.

Next, hot air is supplied from a hot air supply device into the hot air duct 21 and jetted from the jet port 23 into the drying tank 2.
The cleaning liquid scattered by the above-described air and the cleaning liquid remaining on and adhering to the work W are evaporated. At this time, since the opening 3 of the drying tank 2 is closed by the cover 5, it is possible to prevent a part of the hot air supplied into the drying tank 2 from being released to the outside. The supply efficiency is increased, and the time for evaporating the cleaning liquid scattered by the air and the cleaning liquid remaining and adhering to the work W can be reduced.

When the suction pump is driven after these cleaning liquids evaporate, the vapor in the drying tank 2 is sucked from the suction port 25 of the suction nozzle 24 and then discharged to the outside via the suction hose 26. You. At this time, the guide mechanism 27 is driven by the driving device, and the suction nozzle 24 reciprocates along the work W in a state where the suction port 25 is in contact with the bottom outer surface of the work storage box H.
As shown in FIG. 4, the cleaning liquid interposed in a portion of the work W that contacts the bottom inner surface of the work storage box H of the work W is sucked from the suction port 25 and discharged to the outside.

The present invention is not limited to the above embodiment, but can be appropriately modified without departing from the gist of the present invention. For example, in the above-described embodiment, the air is supplied from the air supply means to the air inflow pipe 13 so that the air is blown from the discharge port 11 to the work W. By supplying high-temperature air, that is, hot air to the air inflow pipe 13, hot air can be blown from the discharge port 11 onto the work W.

[0030]

As is apparent from the above description, according to the present invention, hot air is supplied into the drying tank whose opening is closed by the closing member to evaporate the liquid in the drying tank, and is discharged by the discharging means. The steam in the drying tank is sucked and discharged to the outside. Therefore, it is possible to prevent a part of the hot air supplied into the drying tank from being released to the outside. As a result, the supply efficiency of the hot air is higher than in the related art, the time for evaporating the liquid in the drying tank can be shortened, and the efficiency of the work for drying the work can be improved.

The air blow nozzle has a cylindrical nozzle body having an outer peripheral surface formed with a discharge port for blowing the air to the work, and an outer peripheral surface and an inner peripheral surface of the nozzle main body inside the nozzle main body. In the case of using an air blow nozzle provided with an insertion tube having an opening formed in the outer peripheral surface and a space formed between the insertion tube and an air supply means for supplying the air to the inside of the insertion tube, The air supplied to the inside of the insertion tube by the air supply means flows out of the opening, is rectified in the space, and is then discharged from the discharge port of the nozzle body and blown to the work. For this reason,
Uniform air without discharge unevenness can be discharged from the discharge port and blown to the work, so that it is possible to prevent dry unevenness from occurring on the work.

Further, an air blow nozzle is provided movably along the work with the discharge port facing the work accommodated in the drying tank, and the air blow nozzle is provided with the discharge port facing the work. When supported by a moving unit that moves along the work, for example, by moving the air blow nozzle along the upper surface of the work by the moving unit, air can be uniformly blown from the discharge port to the upper surface of the work. .

Further, in the case where the work is placed in the tank body with the work placed on the bottom inner surface of the cage-shaped work storage box, the suction port of the discharge means is provided along the work at the bottom outer surface of the work storage box. If the suction port is supported by moving means that slides along the work on the outer surface of the bottom of the work storage box, the suction port of the discharge means is moved by the moving means to the bottom of the work storage box. By sliding along the work on the outer surface, the vapor in the drying tank is suctioned from the suction port and discharged to the outside, and the liquid interposed in the portion of the work that contacts the bottom inner surface of the work storage box is suctioned. Then, since the work is discharged to the outside, the contact portion between the work and the bottom inner surface of the work storage box can be sufficiently dried.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a work drying apparatus according to an embodiment of the present invention.

FIG. 2 is a left side view in which a part of FIG. 1 is cut away.

FIG. 3 is a vertical sectional view of an air blow nozzle.

FIG. 4 is a detailed view of a portion A in FIG. 1;

FIG. 5 is an overall perspective view of a work storage box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work drying device, W ... Work, H ... Work storage box, 2 ... Drying tank, 5 ... Cover, 8 ... Air blow nozzle, 11 ... Discharge port, 9 ... Nozzle body, 12 ... Intubation, 1
3 ... through-hole, K ... space, 19 ... air cylinder, 21 ...
Hot air duct, 24: suction nozzle, 27: guide mechanism

Claims (5)

(57) [Claims] In a method for drying a work to which a liquid such as a cleaning liquid has adhered, the work is accommodated in a closed space, and in this state, air at a predetermined air pressure is blown to the work to blow the work. A step of scattering the liquid to be attached, a step of supplying hot air to the closed space to evaporate the liquid in the space, and a step of sucking vapor in the closed space and discharging the same to the outside. A method for drying a work, comprising: 2. An apparatus for drying a work to which a liquid such as a cleaning liquid has adhered, comprising: a tank main body having an opening at an upper portion for accommodating the work therein; and a closing member for closing the opening of the tank main body. A drying tank, an air blow nozzle that blows air having a predetermined air pressure onto the work housed in the drying tank to scatter liquid adhering to the work, and supplies hot air into the drying tank to perform the drying. An apparatus for drying a workpiece, comprising: hot air supply means for evaporating a liquid in a tank; and discharge means for sucking vapor in the drying tank and discharging the vapor to the outside. 3. The air blow nozzle has a cylindrical nozzle body having an outer peripheral surface formed with a discharge port for blowing the air to the work, an outer peripheral surface inside the nozzle main body, and an inside of the nozzle main body. An inner tube having a space formed between the inner tube and the outer surface and having an opening formed in the outer surface, and air supply means for supplying the air to the inside of the inner tube. The apparatus for drying a work according to claim 2. 4. The air blow nozzle is provided so as to be movable along the work with the discharge port facing the work accommodated in the drying tank, and the air blow nozzle is provided with the discharge port. 4. The apparatus for drying a work according to claim 3, wherein the apparatus is supported by moving means for moving the work along the work while facing the work. 5. The apparatus according to claim 5, wherein said work is placed in said tank body in a state of being placed on a bottom inner surface of a cage-shaped work storage box, wherein a suction port of said discharge means is provided on a bottom outer surface of said work storage box. The suction port is slidably provided along the work, and the suction port is supported by a moving means that slides along the work on an outer bottom surface of the work storage box. Or the drying device for a workpiece according to 4.