JP2007085630A - Drying device of surface treated-work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drying device of a surface treated-work capable of shortening a drying time, uniformly drying the work, and reducing a dimension, costs and running costs of the device. <P>SOLUTION: This drying device comprises a basket holder 7, a rotating table 6 rotatably holding the basket holder 7, and a rotary driving portion 11 for transmitting rotating power to the rotating table 6, the basket holder 7 is provided with a plurality of suction fins on its outer periphery surrounding a rotating axis, a blade face of each suction fin is faced to the radial direction, and the suction fin is obliquely formed to generate air suction flow from an upper portion of the basket 10 to the outside from a peripheral wall 10b through the inside in rotating the basket holder 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drying apparatus for a surface-treated workpiece that can be suitably used in a surface treatment process such as plating.

Various dryers employing a centrifugal dehydration method have been proposed as dryers used in a drying process after performing a surface treatment such as plating (see, for example, Patent Document 1). This type of dryer is capable of supporting a breathable basket used for drying a surface-treated workpiece, and can be freely loaded and unloaded, a turntable that rotatably holds the basket holder, and the rotation And a rotational drive unit that transmits rotational power to the basket holder via the table.
The basket holder is usually a bottomed cylinder formed of punching metal or the like, and its peripheral wall has air permeability. The centrifugal dehydration method is preferable in that the drying time is relatively faster than other drying methods (electromagnetic wave drying method, hot air drying method, air drying method, vacuum drying method, solvent displacement drying method, etc.).

In addition, as a dryer that employs a drying method other than those described above, there is also known a stationary dryer having a blowing means for blowing high-pressure hot air into the basket (for example, Patent Document 2).
JP-A-60-29498 JP-A-9-72659

In a dryer that performs centrifugal dehydration, there is an aspect that it is difficult to keep the material temperature (workpiece temperature) constant. This is because, after galvanizing, when drying a surface-treated workpiece that has been colored such as UNIQLO or Chromate, when the workpiece is small, it is in basket capacity units, and when the workpiece is somewhat large, in individual workpieces, This leads to a problem that it is difficult to keep the color development constant.
As for the drying speed, although centrifugal dehydration is superior to other drying methods, there is still a room for improvement because there is a demand that the faster the speed, the better. However, the drying speed is not simply high, and it is assumed that the drying is uniform, and if even a single drop of dry residue occurs, it will remain as a stain. That is, it must be dry at once.

On the other hand, a stationary dryer that blows high-pressure hot air into the basket (Patent Document 2) requires a powerful high-pressure blower and a large-capacity heater to generate high-pressure hot air. There were various problems such as an increase in running cost and a running cost.
The present invention has been made in view of the above circumstances, and is a surface-treated workpiece that is short in drying time, can be uniformly dried, and can be reduced in size, cost and running cost as an apparatus. An object of the present invention is to provide a drying apparatus.

In order to achieve the above object, the present invention has taken the following measures.
That is, in the apparatus for drying a surface-treated workpiece according to the present invention, a basket holder that can support a breathable basket used for drying the surface-treated workpiece and can freely place and remove the basket holder, It has a turntable that is rotatably held, and a rotation drive unit that transmits rotational power to the basket holder via the turntable.
The basket holder is provided with suction fins that are positioned radially away from the rotation axis and that rotate integrally with the basket holder at a plurality of locations surrounding the rotation axis. The suction fin has a blade surface directed in the radial direction to ensure air permeability along the blade surface. Further, the suction fin is formed to have a blade surface inclination that can generate an air flow that passes through the basket peripheral wall or bottom surface through the inside of the basket from the upper side of the holding basket when the basket holder rotates. Yes.

With this configuration, if the basket is rotated while the basket is held by the basket holder, the inside of the basket is made part of the air passage from above the basket by the suction fin that rotates together with the basket holder. On the other hand, an air suction flow that goes outward from the peripheral wall and bottom surface of the basket is generated. Therefore, the surface-treated work put in the basket is subjected to the centrifugal force due to the rotation of the basket, and at the same time is positively and forcibly exposed to the air suction flow.
In addition, the air suction flow with the inside of the basket as an air flow path has the effect of constantly replacing the atmosphere in the basket (environment around the surface-treated workpiece) with fresh air, resulting in forcing air with moisture from within the basket. Therefore, it is useful for rapid drying and uniform drying of the workpiece. Therefore, the work in the basket is dried quickly and uniformly by simultaneously receiving the action of blowing off the water accompanying the centrifugal force and the action of vaporization by the air flow contact.

As an example, the basket holder has a support plate for receiving the bottom surface of the basket, and a steadying member protruding from the outer periphery of the support plate at a height that can be engaged with the peripheral wall of the basket. And can. In this case, it is possible to provide a side opening portion in the height region of the steady rest member (which may be the entire height region or a partial region), and to provide a suction fin in the side portion opening portion. Further, a side opening portion may be provided in the height region of the support plate, and a suction fin may be provided in the side opening portion.
By adopting these structures, the basket holder uses its own peripheral wall as an exhaust passage, and constitutes a so-called sirocco fan.

By adopting such a sirocco fan configuration, the structure can be simplified and miniaturized. In addition, the manufacturing cost of the apparatus can be reduced. Needless to say, since the sirocco fan has been proven to be excellent in generating efficiency of the air suction flow, it can be seen that the running cost in operation can be reduced.
It is preferable to provide a warm air supply section for forcing warm air to the basket holder from above to the holding position of the basket. By doing so, the air suction flow generated by the suction fins becomes warm air, which is further beneficial for quick drying and uniform drying of the surface-treated workpiece.

The suction fin can be formed as a fin block in which a plurality of rows are connected together. In this case, it is preferable that the fin block is detachable from the basket holder by adopting a structure such as a bolt connection.
In this way, when a suction fin is missing, cracked, bent or the like, the corresponding suction fin can be easily and quickly replaced as a replacement for each fin block including the suction fin. is there. Also, with this structure, when the type of work to be put into the basket changes, the strength of the air suction flow can be easily adjusted as desired by replacing the fin block.

  In the drying apparatus for a surface-treated workpiece according to the present invention, the drying time is short and uniform drying can be performed. In addition, the apparatus can be reduced in size, cost, and running cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of a drying apparatus 1 for a surface-treated workpiece according to the present invention. As shown in FIGS. 1 and 2, the drying apparatus 1 has a dehydration chamber 5 formed in an apparatus housing 4 mounted on an upper portion of a base 3, and a basket is placed in the dehydration chamber 5 via a turntable 6. In this structure, a holder 7 is provided. A basket 10 containing a surface-treated workpiece can be placed on or taken out of the basket holder 7.
The turntable 6 includes a rotating portion 6A coupled to the basket holder 7, and a pedestal portion 6B coupled to the base 3 while supporting the rotating portion 6A. The rotating portion 6A and the pedestal portion 6B are provided. The relative rotation is possible. In the apparatus housing 4, a rotation drive unit 11 such as an electric motor is provided outside the dehydration chamber 5, and a combination of a V belt and a V pulley is provided between the rotation drive unit 11 and the rotation unit 6 A of the turntable 6. The transmission means 12 is connected so as to be capable of interlocking rotation.

  Further, a warm air supply unit 13 is provided outside the dehydration chamber 5 in the apparatus housing 4, and the warm air generated by the hot air supply unit 13 is passed through the duct 14 to the basket holder 7. It is blown into the held basket 10. The temperature of the hot air varies depending on the material of the workpiece, mass (volume), surface area, shape, amount to be put into the basket 10, etc., but may be about 50 ° C. to 60 ° C. A gas burner, an oil burner, an electric heater, or the like may be employed as a heat source for generating warm air in the warm air supply unit 13, and a method using steam heat may also be employed.

Thus, this drying apparatus 1 rotates the basket 10 containing the surface-treated work at high speed, and performs work drying by centrifugal dehydration. In addition, warm air is blown into the basket 10 during centrifugal dewatering to vaporize even a slight amount of water remaining on the work.
The device casing 4 is provided with a lid 15 that swings upward and downward so that the work can be prevented from jumping out of the basket 10, splashing of water droplets during centrifugal dehydration, escape of hot air, thermal diffusion, and the like. It has become.

The basket 10 is formed into a short cylindrical shape with a bottom and a wide mouth by punching metal or a net material, and the peripheral wall 10a and the bottom surface 10b thereof have air permeability. Stainless steel is preferably used as the forming material.
The basket holder 7 includes a support plate 20 that receives the bottom surface 10 b of the basket 10, and an anti-sway member 21 that protrudes from the outer periphery of the support plate 20 at a height that can be engaged with the peripheral wall of the basket 10. is doing.
As shown in FIGS. 3 and 4, the support plate 20 is a disk that is slightly larger in diameter than the bottom surface 10 b of the basket 10, and a cushioning material 22 such as a rubber plate is provided on the top surface. The steady rest member 21 has posts 23 erected at predetermined intervals along the outer periphery of the support board 20, and a holder top 24 lifted and supported by these posts 23 to a predetermined height. Yes. The holder top 24 can be formed in a ring shape that fits around the peripheral wall 10 a of the basket 10. In addition, it is not limited to this, What was formed as those aggregate | assembly by the several piece parted by several places of the circumferential direction may be used.

This steadying member 21 includes a side portion between upper and lower surfaces of the upper surface of the support plate 20 and the lower surface of the holder top 24 (within the height region of the steadying member 21) and defined by posts 23 adjacent to each other. An opening 25 is formed.
When the basket 10 is placed on the basket holder 7, the bottom surface 10 b of the basket 10 comes into surface contact with the upper surface (buffer material 22) of the support plate 20 of the basket holder 7, and the peripheral wall 10 b of the basket 10 is prevented from shaking in the basket holder 7. Surrounded by the holder top 24 of the member 21, the basket 10 is also integrally rotated when the basket holder 7 is rotated. The said side part opening part 25 provided in the steadying member 21 is the position which exposes the surrounding wall 10a of the basket 10 to the outside at this time (it gives air permeability).

In the basket holder 7, each side opening portion 25 of the steadying member 21 is provided with a fin block 30 shaped like a vertical ventilation gallery. In the present embodiment, eight posts 23 of the steady rest member 21 are provided and eight side opening portions 25 are formed. Therefore, the arrangement location of the fin block 30 also surrounds the rotational axis of the basket holder 7. There are 8 places in total.
As shown in FIG. 5, each fin block 30 includes a plurality of (five in the illustrated example) suction fins 31 arranged in parallel at a predetermined interval (a gap is ensured). Each suction fin 31 is provided with both end portions directed upward and downward (in short, in a vertically long posture), and these upper end portions and lower end portions are connected to a connecting plate 32 by welding or the like (see FIG. 4). Each connecting plate 32 is attached to the steady member 21 by a bolt 33. Therefore, when the basket holder 7 rotates, all the fin blocks 30 (that is, all the suction fins 31) also rotate together with the basket holder 7. .

The suction fins 31 are oriented so that their blade surfaces extend in the radial direction from the rotational axis of the basket holder 7. Therefore, in the fin block 30, air permeability along the blade surface of each suction fin 31 is ensured between the suction fins 31.
Further, when the basket holder 7 rotates, each of the suction fins 31 generates an air suction flow that flows outward from the peripheral wall 10b of the basket 10 through the basket 10 from above the basket 10 held by the basket holder 7. It has a blade surface inclination that can be generated.

In this way, the basket holder 7 has a bottomed short cylindrical shape with the support plate 20 as the closed bottom plate and the steady member 21 as the peripheral wall, and the steady state member 21 has a fin block 30 (a plurality of suction fins). Since the structure 31) is incorporated, all the fin blocks 30 act as exhaust passages when the basket holder 7 rotates, and the entire basket holder 7 constitutes a sirocco fan.
In the drying apparatus 1 according to the present invention having such a configuration, the basket 10 containing the work is held in the basket holder 7, the lid 15 of the apparatus housing 4 is closed, and the basket holder is rotated by the rotation drive unit 11 in this state. 7 is rotated. At the same time, it is assumed that warm air is generated by the warm air supply unit 13.

As a result, the basket holder 7 and the basket 10 held by the basket holder 7 rotate together, and the fin block 30 (suction fin 31) rotates together with them. Therefore, the rotation of the suction fin 31 generates an air suction flow that makes the inside of the basket 10 a part of the air passage from above the basket 10 and goes out from the peripheral wall 10a of the basket 10. This air suction flow is warm air (about 50 to 60 ° C.) from the warm air supply unit 13.
Accordingly, the surface-treated work (indicated by reference symbol W in FIG. 4) placed in the basket 10 is subjected to centrifugal force due to the rotation of the basket 10 and at the same time is positively and forcedly applied to the air suction flow (warm air). Will be exposed to. The air suction flow with the inside of the basket 10 as a ventilation passage has an effect of constantly replacing the atmosphere in the basket 10 (environment around the workpiece W) with fresh air, and as a result, the air with moisture is forced from the inside of the basket 10. Therefore, it is useful for quick drying and uniform drying of the workpiece W.

For these reasons, the workpiece W in the basket 10 is simultaneously and quickly dried by receiving both the blow-off action of water accompanying the centrifugal force and the vaporization action by the air flow (hot air) contact. Therefore, when the workpiece W is subjected to color treatment after plating, a certain color is obtained and no stains remain.
The drying apparatus 1 according to the present invention has a sirocco fan configuration, which simplifies the structure, reduces the size, and reduces the cost of manufacturing the apparatus. In addition, since the efficiency of generating the air suction flow is excellent, the running cost for operation is also low.

FIG. 6 shows a second embodiment of the drying apparatus 1 according to the present invention. The most different point of the drying apparatus 1 of the second embodiment from the first embodiment is that the support disk 20 is formed in the basket holder 7 as being thick, and the thickness within the height region (in the height region). ) In that suction fins 31 are provided.
The suction fin 31 has a length up to a position where the bottom surface 10b of the basket 10 can be received as well as the lower portion of the holder top 24 (the position protruding from the bottom surface 10b of the basket 10) of the steadying member 21. As formed. Accordingly, the basket 10 is supported by the upper ends of all the suction fins 31.

FIG. 7 shows a third embodiment of the drying apparatus 1 according to the present invention. Also in the drying apparatus 1 of the third embodiment, in the basket holder 7, the support plate 20 is formed to be thick, and the side suction fins 31 are provided within this thickness (in the height region). The suction fins 31 are provided only in the region for receiving the bottom surface 10 b of the basket 10, and do not reach the lower part of the holder top 24.
The drying apparatus 1 according to the third embodiment is suitable when it is easy to ensure ventilation to the bottom side in the basket 10 when the workpiece W is relatively large.

By the way, the present invention is not limited to the above embodiments, and can be appropriately changed according to the embodiments.
For example, the suction fin 31 is suitable for increasing the air suction action as the length in the direction along the rotation axis is increased. The extent to which the suction fin 31 is increased depends on the material, mass (volume), and surface area of the workpiece. It can be determined by the shape, the amount to be put into the basket 10, etc. Based on this determination, it can be made longer or shorter than that shown in the first embodiment, or it can be shown in the second embodiment or the third embodiment. Or just select it.

The suction fins 31 do not need to exist as the fin block 30 and can be incorporated as a part of the structure of the basket holder 7 itself. In the first embodiment, the post 23 can be omitted as a structure in which the holder top 24 of the steadying member 21 is supported by the suction fins 31. In some cases, the holder top 24 itself is also omitted, and the shape, size and arrangement of the suction fins 31 are matched to the peripheral wall 10a of the basket 10 so that the suction fin 31 itself also serves as the steadying member 21. can do.
The rotation axis for rotating the basket holder 7 is not limited to the vertical direction, and may be inclined.

It is the side view which showed 1st Embodiment of the drying apparatus which concerns on this invention. It is an AA arrow line view of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 2. FIG. 4 is a cross-sectional view corresponding to the line CC in FIG. 3. It is the D section enlarged view of FIG. It is the principal part side view which showed 2nd Embodiment of the drying apparatus which concerns on this invention. It is the principal part side view which showed 3rd Embodiment of the drying apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying device 6 Turntable 7 Basket holder 10 Basket 10a Peripheral wall 10b Bottom surface 11 Rotation drive part 13 Hot air supply part 20 Support board 21 Stabilizing member 25 Side part open part 30 Fin block 31 Suction fin

Claims (5)

A basket holder (7) capable of supporting the breathable basket (10) used for drying the surface-treated workpiece and allowing the basket holder (7) to rotate freely. A table (6), and a rotation drive unit (11) for transmitting rotational power to the basket holder (7) through the rotation table (6),
The basket holder (7) is provided with suction fins (31) which are positioned radially away from the rotation axis and which rotate integrally with the basket holder (7) at a plurality of locations surrounding the rotation axis. ,
The suction fin (31) has a wing surface directed in the radial direction so as to ensure air permeability along the wing surface, and the basket holder (7) is rotated from above the basket (10) in a holding state when the basket holder (7) is rotated. (10) It is characterized by having a blade surface inclination that can generate an air suction flow that passes through the peripheral wall (10a) to the bottom surface (10b) of the basket (10) through the inside and exits outward. Drying equipment for surface treated workpieces.   The basket holder (7) is engaged with the support plate (20) for receiving the bottom surface (10b) of the basket (10) and the peripheral wall (10a) of the basket (10) from the outer peripheral portion of the support plate (20). And an anti-sway member (21) projecting at a possible height, of which a side opening (25) is provided in the height region of the anti-sway member (21). The drying apparatus for a surface-treated workpiece according to claim 1, wherein the suction fin (31) is provided in the open portion (25).   The basket holder (7) is engaged with the support plate (20) for receiving the bottom surface (10b) of the basket (10) and the peripheral wall (10a) of the basket (10) from the outer peripheral portion of the support plate (20). And an anti-sway member (21) projecting at a possible height, of which a side opening (25) is provided in the height region of the support plate (20). The apparatus for drying a surface-treated workpiece according to claim 1, wherein the suction fin (31) is provided in the section (25).   The hot air supply part (13) for forcing hot air to the basket holder (7) from above to the holding position of the basket (10) is provided. The apparatus for drying a surface-treated workpiece according to claim 3.   The suction fin (31) is formed as a fin block (30) in which a plurality of rows are connected together, and the fin block (30) is detachable from the basket holder (7). The apparatus for drying a surface-treated workpiece according to any one of claims 1 to 4.

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