JPH1128424A - Device for removing surface adhered powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removing device for surface adhered powder capable of discriminating only the powder adhered to the surfaces of transporting materials. SOLUTION: This removing device for the surface adhered powder has a cylindrical body 11 having a separating chamber 12 for separating the powder 7 adhered to the transporting materials 1, a supplying cylindrical part 13a for supplying the transporting materials 1 into the separating chamber 12, a collision plate 10 for bringing the transporting materials 1 into collision, a gas flow passage 19 for blowing up only the powder 7 splashed by this collision plate 10 into the separating chamber 12 and a discharge cylindrical part 20a for discharging this powder 7. The inner side of this discharge cylindrical part 20a is provided with a cylindrical bulkhead part 21 forming a discharge path 20 with the discharge cylindrical part 20a. This bulkhead part 21 is formed to the diameter larger than the diameter of the supplying cylindrical part 13a. The sectional shape of the discharge path 20 is formed approximately equal even in any position along the extension direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cylindrical body for forming a separation chamber for separating a powder from the conveyed object by introducing a conveyed object having powder adhered to the periphery thereof. A supply tube portion that forms a supply path for dropping the conveyed object with respect to the inside of the separation chamber, and the powder adhering to the surface of the conveyed object by colliding the conveyed object below the supply cylinder portion. A collision plate for scattering the body is provided, and only a drop of the conveyed object is allowed in a gap between a peripheral portion of the collision plate and an inner peripheral wall of the cylindrical main body, and the scattered powder is collected in the separation chamber. Forming a gas flow path flowing into the separation chamber, and forming a discharge path for discharging the blown-up powder from the separation chamber to an outer side of the supply cylinder. Of the surface-attached powder which is arranged concentrically and is connected to the cylindrical main body. About removed by the device.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus for removing powder adhering to a surface is, for example, shown in FIG. That is, the conveyed object 1 is caused to collide with the collision plate 10 provided inside the apparatus, the powder 7 attached to the surface of the conveyed object 1 is separated and scattered, and the powder 7 is blown up from below the collision plate 10. Style G
This discharges it out of the device.

As described above, it is necessary to remove the powder 7 adhering to the surface of the conveyed article 1 by, for example, using an amorphous polyester chip (hereinafter referred to as a “PET chip 1a”). This is a case where the polymerization reaction is carried out so that the polymerization degree becomes as follows. When manufacturing a PET bottle or the like from the amorphous PET chip 1a as a raw material, it is necessary to subject the PET chip 1a to solid-state polymerization to a certain degree in order to provide a predetermined strength or the like. Therefore, the PET chip 1a is heated to a predetermined temperature using a crystallization machine or the like. However, during the solid phase polymerization, during the transportation or during the drying step, PET
The fine particles of PET may adhere to the surface of the PET chip 1a because the chips 1a or the PET chip 1a and the wall surface of the device come into contact with or rub against each other.
As described above, the PET chips 1a and PET having different sizes are different from each other.
When the temperature of the powder 7 is simultaneously raised by the crystallization machine or the like,
As a result of the temperature rise of the PET powder 7 being performed very early, the degree of polymerization of the PET chip 1a and the degree of polymerization of the PET powder 7 are significantly different, and a homogeneous PET material cannot be obtained. Therefore, conventionally, the powder 7 adhering to the surface of the conveyed article 1 has been removed using a device for removing powder adhering to the surface as shown in FIG.

[0004]

However, the above-described conventional apparatus for removing powder adhering to a surface has the following problems. That is, in the conventional removing device, the supply tube portion 13a and the discharge tube portion 20a are configured by simply partitioning the inside of the removal device by the tube member 30, and the falling supply path 13
And the discharge path 20 of the powder 7 were very close to each other. As a result, the transported object 1 rebounded by the collision plate 10
However, there is a disadvantage that the conveyed product 1 easily enters the discharge tube portion 20a and even the conveyed article 1 is discharged. Further, as shown in FIG. 5, the lower end portion of the cylindrical member 30 that separates the supply cylindrical portion 13a and the discharge cylindrical portion 20a is formed by bending outward, so that it extends along the axis Z of the discharge cylindrical portion 20a. The cross-sectional area of the discharge cylinder portion 20a was changed. As a result, a turbulent flow occurs in the gas flow G inside the discharge tube portion 20a, and the conveyance of the powder 7 is hindered, and a sufficient discharge effect of the powder 7 may not be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide an apparatus for removing powder adhering to a surface which can reliably separate only powder adhering to the surface of a conveyed object.

[0006]

The features of the present invention for achieving this object will be described with reference to the examples shown in FIGS.

(Structure 1) In the apparatus for removing powder adhering to a surface according to the present invention, as described in claim 1, a discharge passage 20 is formed inside the discharge cylinder 20a and between the discharge cylinder 20a. The partition 21 is formed to have a larger diameter than the supply cylinder 13a, and the cross-sectional shape of the discharge path 20 is substantially equal at any position along the extending direction. It is characterized by the point of formation. (Operation / Effect) As in this configuration, by setting the diameter of the cylindrical partition wall forming the discharge path to be larger than that of the supply cylinder,
The discharge cylinder can be further separated outward from the supply cylinder. Therefore, the distance between the collision plate and the lower end portion of the discharge cylinder portion is increased, and the chance that a conveyed object that has collided with the collision plate enters the discharge cylinder portion is reduced,
Mixing of the conveyed material into the discharged material can be reduced. In addition, since the cross-sectional shape of the discharge cylinder is formed equally at any position along the extension direction of the discharge cylinder, the gas flow in the discharge cylinder is stable. In the case of this configuration, the gas flow velocity is substantially the same at the lower end portion and the upper end portion of the discharge cylinder portion, and no turbulence occurs in the gas flow. Therefore, if the gas flow velocity in the discharge cylinder is set to a speed sufficient to convey the powder, the powder once entering the lower end of the discharge cylinder will pass through the discharge cylinder. And will be reliably discharged.

(Structure 2) According to a second aspect of the present invention, there is provided an apparatus for removing powder adhering to a surface, wherein the supply tube portion 13a is provided.
Is constituted by an inner tubular member 14, and the discharge tubular portion 20 a can be constituted by an outer tubular member 22 having a larger diameter than the inner tubular member 14 and the inner peripheral wall 16 of the tubular main body 11. (Operation / Effect) With this configuration, for example, the inner cylindrical member forming the supply cylindrical portion and the outer cylindrical member forming the discharge cylindrical portion are formed of different members having different diameters, and the supply cylindrical portion is formed. The discharge cylinder may be configured to have a small diameter on the shaft center side of the apparatus, and the discharge cylinder may be configured to have a large diameter on the side of the cylindrical main body. In this case, the distance between the collision position of the conveyed object against the collision plate and the lower end of the discharge cylinder can be positively separated in the radial direction of the apparatus axis. As a result, it is possible to further reduce the chance that the conveyed object rebounded by the collision plate enters the discharge cylinder portion, and to enhance the powder separating effect.

(Structure 3) According to a third aspect of the present invention, there is provided an apparatus for removing powder adhering to a surface, wherein the supply tube portion 13a is provided.
May be provided with an auxiliary collision plate 10a. (Operation / Effect) With this configuration, the conveyed object that has fallen inside the supply cylinder is first impacted by the auxiliary collision plate, and a part of the powder attached to the surface of the conveyed object is separated. Alternatively, a part of the powder rises from the surface of the conveyed object. Therefore, the powder can be reliably separated by the impact of the collision plate located below.

(Structure 4) In the apparatus for removing powder adhering to a surface according to the present invention, as described in claim 4, the collision plate 10 can be formed in multiple stages. (Operation / Effect) According to this configuration, the number of collisions of the conveyed object is increased, and the ratio of the powder scattered and separated from the conveyed object can be increased, so that the effect of removing the powder is further improved.

(Structure 5) In the apparatus for removing powder adhering to a surface according to the present invention, the lower surface 25b of the multi-stage impact plate 10 can be formed as a downward conical surface. (Operation / Effect) With this configuration, the gas flow from below flows along the lower surface, so that the scattered powder does not adhere to and accumulate on the lower surface, and the powder is discharged efficiently. Can be increased. As a matter of course, since the conveyed object collides with the upper surface of the collision plate, powder does not accumulate on the upper surface.

In the description of the means for solving the above problems, reference is made to the drawings, and in order to facilitate comparison with the drawings, reference characters will be described. However, the present invention is limited to the configuration of the accompanying drawings. Not something.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

(Summary) An apparatus for removing powder adhering to a surface according to the present invention (hereinafter simply referred to as "powder removing apparatus") is, for example, as shown in FIG. Hereinafter, referred to as “PET chip”). The polymerization system S is
For example, it has the following configuration. That is, PE that is the conveyed object 1
150 ° C. to 170 ° C. while holding the T chip 1a for about 5 minutes
The crystallization machine 2 which raises the temperature to crystallize the PET chip 1a to facilitate the subsequent steps and the like, and the PET chip 1a which has been processed in the crystallization machine 2 is heated at 160 ° C. to 180 ° C. for 3 hours. Dryer 3 for maintaining and drying for about 4 hours and 185 ° C. for increasing the degree of polymerization of the dried PET chips 1a.
A heater 4 for raising the temperature to about 200 ° C., and a reactor 5 for maintaining the temperature of about 200 ° C. for a predetermined time to raise the degree of polymerization of the PET chip 1 a after the temperature rise to a predetermined degree of polymerization. And a cooler 6 for cooling the PET chip 1a having reached a predetermined degree of polymerization.

The powder removing apparatus according to the present invention is used by being attached above, for example, the dryer 3 and the reactor 5 in the polymerization system S. The powder removing device is a device for separating and removing PET fine powder attached to the surface of the PET chip 1a. These powders 7 are PET chips 1
This occurs due to the collision / friction of the PET chips 1a when transporting a, or the collision / friction of the PET chips 1a and the wall of the apparatus. If the polymerization reaction of the PET chip 1a is advanced in a state where the PET chip 1a and a large amount of the powder 7 are mixed, the temperature rising rate of the PET chip 1a may be different from the temperature rising rate of the powder 7. As a result, there is a disadvantage that the degree of polymerization of the product is not uniform. Therefore, at a predetermined stage of the polymerization system S, the powder 7 adhering to the surface of the PET chip 1a is removed. The drying unit 3 and the crystallization unit 2
A first gas circulation path 8 for circulating a high-temperature gas is provided in these devices. Further, between the heater 4 and the reactor 5, a second gas circulation path 9 for circulating a high-temperature gas is also provided in these devices. The powder removing device of the present invention uses the gas flowing through the first gas circulation path 8 and the second gas circulation path 9 to form the conveyed article 1 without forming a special gas flow path. This is for removing the powder 7 attached to the surface of the PET chip 1a.

(Device for Removing Powder Attached to Surface) The configuration of a powder removing device according to the present invention is shown in FIG. The powder removing device inputs the PET chip 1a, which is the conveyed object 1, from above, collides the PET chip 1a with a collision plate 10 provided inside, and the powder separated from the surface of the PET chip 1a by the impact. G that causes only 7 to be ejected from below collision plate 10
Is to be discharged. Hereinafter, details of the powder removing apparatus will be described.

<Cylindrical Body> The powder removing apparatus has a substantially cylindrical tubular body 11, and a PET chip 1a is inserted into the cylindrical body 11 to remove the PET chip 1a from the PET chip 1a. It has a separation chamber 12 for separating the powder 7.

<Supply cylinder> Above the separation chamber 12,
Mainly, a supply tube portion 13a serving as a drop supply path 13 for the PET chip 1a is provided. The supply tube portion 13a is constituted by, for example, an inner tube member 14 having a simply cylindrical shape.
The axis of the supply cylinder 13a is aligned with the axis of the apparatus main body. Hereinafter, these axes are represented by axis Z. The supply cylinder portion 13a functions as a guide cylinder for reliably causing the PET chip 1a to collide with the collision plate 10 described later, and a part of the gas flow G from below the collision plate 10 is supplied by the supply cylinder portion 13a. It also functions as a path when flowing into the crystallizer 2 connected above the cylindrical portion 13a.

<Collision plate> A collision plate 10 for colliding the PET chip 1a to scatter the powder 7 adhered to the surface of the PET chip 1a is provided below the supply cylinder 13a. is there. The collision plate 10 is, for example,
It is an umbrella-shaped member having a conical shape that becomes a substantially equilateral triangle in side view. In order to ensure the collision of the PET chip 1a, the outer diameter of the collision plate 10
The diameter is larger than the inner diameter of a. The collision plate 10 is disposed on the axis Z of the supply cylinder 13a. A support rod 15 extending in the axis Z direction is attached to a central portion on the lower surface side of the collision plate 10. The support rod 15 is attached to a support leg 17 attached to an inner peripheral wall 16 of the tubular main body 11 via a vertical position adjustment mechanism 18. The support leg 1
Numeral 7 is composed of, for example, three plate-shaped legs, and is disposed so as to include the axis Z in a plate-shaped surface so as not to hinder the PET chip 1a from falling and passing. Further, the upper and lower ends of the support leg 17 are processed into an edge shape so that the PET chip 1a can pass more smoothly.

The peripheral portion of the collision plate 10 and the cylindrical main body 1
A predetermined gap is formed between the first gap and the first gap. The gap functions as a gas flow path 19 for flowing a high-temperature gas into the separation chamber 12. When a powder removing device is attached to the dryer 3, the gas flow G is
The gas in the first gas circulation path 8 extending between the dryer 3 and the crystallizer 2 is used. For this reason, in configuring the powder removing device, it is not necessary to separately provide a gas supply unit for separating the powder 7, and the configuration of the device can be simplified. Only the PET chip 1a can pass downward through the gas flow path 19, and the powder 7 separated and scattered by the impact with the collision plate 10 is separated by the gas flow G into the separation chamber 12
The powder 7 is discharged from a discharge cylinder 20a which is a discharge path 20 for discharging the powder 7. As shown in FIG. 2, a portion of the inner peripheral wall 16 of the cylindrical main body 11 located on the side of the collision plate 10 has a substantially conical surface that extends upward. With this configuration, by adjusting the position of the collision plate 10 up and down, the gas flow path 19 can be freely expanded and contracted, and the gas flow velocity in the gas flow path 19 can be controlled.

<Discharge cylinder> The supply cylinder 1 is located above the separation chamber 12 and outside the supply cylinder 13a.
A discharge cylinder 20a is formed so as to surround 3a.
The discharge tube portion 20 a is provided with a discharge passage 2 for discharging the powder 7 blown into the separation chamber 12 to the outside of the cylindrical main body 11.
Functions as 0. As shown in FIG.
0 a is formed by the inner peripheral wall 16 of the cylindrical main body 11 and the partition 21. As will be described later, the partition 21 is desirably formed of an outer tubular member 22 that is separate from the inner tubular member 14 so that the diameter of the partition 21 differs from that of the supply tubular portion 13a. The axis of the discharge cylinder 20a is the same as the supply cylinder 13a.
The axis Z is made to match. A powder outlet 2 for discharging the separated powder 7 is provided above the discharge cylinder 20a.
3 is provided. The powder discharge port 2 from the separation chamber 12
In step 3, a part of the gas flow G is divided. Since the powder discharge port 23 is provided so as to open in a tangential direction with respect to the substantially cylindrical discharge tube portion 20a, the gas flow G spirally rises inside the discharge tube portion 20a. Here, the powder 7 that has entered the lower end of the discharge cylinder 20a
It is important that the gas flow velocity in the discharge cylinder portion 20a is not reduced in order to reliably transport the gas to the powder discharge port 23. For this reason, in the present embodiment, the cross-sectional shape of the discharge tube portion 20a is made equal in any direction along the extending direction of the discharge tube portion 20a, that is, along the axis Z. With this configuration, the discharge cylinder portion 20a
No change in gas pressure or the like occurs in any of the locations, and no turbulence occurs in the gas flow G.
, A stable gas flow G is formed. Note that the flow rate of the gas flow G is a speed at which the powder 7 can be lifted and conveyed, and a speed that is insufficient for raising the PET chip 1a. With this speed, even if the PET chip 1a enters the discharge tube portion 20a,
The PET chip 1a falls into the separation chamber 12 again, and the separation of the powder 7 becomes more reliable. The gas flow velocity in the discharge tube portion 20a can be mainly determined by the width of the discharge tube portion 20a in the radial direction of the axis Z and the amount of gas discharged from the powder discharge port 23. That is, the gas flow velocity increases as the width of the discharge tube portion 20a decreases and the gas discharge amount increases.

In order to improve the effect of removing the powder 7,
It is effective that the supply cylinder 13a and the discharge cylinder 20a are separated from each other in the radial direction of the axis Z. Specifically, as shown in FIG.
The minimum inner diameter of a is larger than the maximum outer diameter of the supply cylinder 13a. When the inner cylindrical member 14 and the outer cylindrical member 22 are formed of different members having different diameters, the falling path of the PET chip 1a is narrowed to the center side in the separation chamber 12, and the PET chip with respect to the collision plate 10 This has the effect of increasing the radial distance between the collision position 1a and the lower end of the discharge cylinder 20a. As a result, the collision plate 1
The PET chip 1a jumped up at 0
a can be reduced. Further, in the case of this configuration, the PET chip 1 dropped and supplied from the supply cylinder 13a is provided.
a is such that P reliably falls on the collision plate 10 and falls below the collision plate 10 without colliding with the collision plate 10.
The number of ET chips 1a decreases. As a result, the amount of the powder 7 separated by the collision increases, and the removal ratio of the powder 7 can be increased. Further, in order to improve the effect of removing the powder 7, it is effective to set the length of the discharge cylinder portion 20a along the axis Z direction to be large. Even if the PET chip 1a enters the lower end of the discharge cylinder 20a, the gas flow rate is insufficient to raise the PET chip 1a. The ascending speed is reduced inside the cylindrical portion 20a, and finally, it shifts to descending. That is,
Even if the PET chip 1a enters the discharge cylinder 20a, the maximum height that can rise from the lower end of the discharge cylinder 20a is limited to a certain range. Therefore, if the discharge cylinder portion 20a is set to be equal to or more than the maximum height, the PET chip 1a will not be discharged from the powder discharge port 23.

(Effect) The separation condition of the powder 7 mainly depends on the material to be conveyed.
, The length of the discharge cylinder 20a along the axis Z direction, and the gas flow velocity, the conditions can be easily set. Further, even if the gas flow G supplied to the separation chamber 12 is diverted from the gas flow G supplied to the dryer 3 or the reactor 5 whose flow velocity is not so large, the size of the discharge tube portion 20a is appropriately set as described above. By doing so, the separation and discharge of the powder 7 can be reliably performed, so that there is no need to separately provide a dedicated separation gas supply means or the like.
Only the powder 7 adhering to the surface of the transported object 1 such as the ET chip 1a can be efficiently separated and removed.

[Alternative Embodiment] <1> In the above embodiment, one collision plate 10 is provided. However, as shown in FIG. 3, an auxiliary collision plate 10a is provided at the lower end of the supply cylinder 13a. You may. The auxiliary collision plate 10a is also formed of a triangular pyramid-shaped umbrella member like the collision plate 10. The auxiliary collision plate 10a is attached to the supply cylinder 13a. Specifically, the rod-shaped support legs 17
a is attached to the supply tube portion 13a,
The auxiliary collision plate 10a is placed and fixed on the support leg 17a. The fixing is performed using an arbitrary method such as welding. As described above, if the auxiliary collision plate 10a is provided, the PET chip 1a that has fallen is first impacted by the auxiliary collision plate 10a, and a part of the powder 7 attached to the surface of the PET chip 1a is separated. Alternatively, part of the powder 7 is made of PET.
The chip 1a floats from the surface. Therefore, the powder 7 is reliably separated by the impact of the collision plate 10 located below.

<2> As shown in FIG. 4, the collision plate 10 may be configured in multiple stages. The collision plate 10 according to the present embodiment includes a body 24 and a plurality of collision pieces 25.
And The plurality of collision pieces 25 have, for example, the same outer diameter, and are provided at equal intervals along the axis Z direction. With this configuration, PET dropped from above
Since the chip 1a is rebounded by the collision pieces 25 and repeatedly repelled with the inner peripheral wall 16 of the cylindrical main body 11, the powder 1a
Separation effect can be enhanced. An inclined surface 26 is provided at an upper end and a lower end of the body 24. The inclined surface 26 at the upper end functions as a collision surface for the PET chip 1a, and the dropped PET chip 1a
And a function of preventing the particles from being deposited on the upper part. The inclined surface 26 at the lower end has a function of reducing the resistance applied to the gas flow supplied from below the powder removing device. Each of the plurality of collision pieces 25 is formed in an abacus ball shape having a substantially conical upper surface 25a and a lower surface 25b. Of these, the top 25
a functions as a collision surface of the PET chip 1a. on the other hand,
The lower surface 25b functions as a gas flow rectifying surface. That is, if the lower surface 25b is formed as a substantially conical surface whose diameter is reduced toward the lower side, the gas flow G from below flows along the lower surface 25b, and the powder 7 adheres to and accumulates on the lower surface 25b. Can be prevented. The collision piece 25
Is set at 45 to 60 degrees in side view, P
It is convenient that the ET chip 1a falls smoothly and the gas flow G rises smoothly. The collision plate 10 is supported using the same support legs 17 as those described above. However, since the inner peripheral wall 16 of the cylindrical main body 11 is formed in a substantially cylindrical shape and the inner diameter is substantially constant, there is little need to provide a vertical position adjusting mechanism when attaching to the support leg 17. . It should be noted that the collision plate 10 of this embodiment has a symmetrical shape in the vertical direction, as is apparent from FIG. For this reason, the mounting direction to the cylindrical main body 11 is not restricted, and the mounting operation is simplified.

(Example) The following is an example in which the powder 7 attached to the surface of the PET chip 1a is separated and removed by using the powder removing device shown in another embodiment shown in FIGS. Is shown. The comparison is made between the PET chip 1a before removing the powder 7 and the Pt after passing through the powder removing device of the present invention.
The amount of the powder 7 adhering to the ET chip 1a was measured. In this case, the powder 7 was removed by a wet sieving method using a 16-mesh sieve. P
The ET chip 1a used had a substantially elliptical cross section with a short width of about 2 mm and a long width of about 3 mm and a length of about 4 mm.

In the powder removing apparatus shown in FIG. 3, a gap between the collision plate 10 and the inner peripheral wall 16 of the cylindrical main body 11 and
The gap between the discharge cylinders 20a was about 20 mm. The height of the cylindrical main body 11 is about 850 mm.
The PET chip 1a was processed at a rate of about 260 kg / Hr using the powder removing device. As a result, the raw material PET chip 1a processed by the conventional apparatus shown in FIG.
pm powder 7 was adhered to the PET chip 1a after being processed by the powder removal device,
m powder 7 only adhered, and the difference 2
38 ppm of the powder 7 could be recovered, and the mixing of the powder 7 into the PET chip 1a could be reduced.

On the other hand, also in the case of the powder removing apparatus shown in FIG. 4, the gap between the collision plate 10 and the inner peripheral wall 16 is about 20 mm.
And The height of the cylindrical main body 11 is about 1500 m.
m. Approximately 260 kg / H
The PET chip 1a was processed at a rate of r. As a result, 370 ppm of powder 7 had adhered to the raw PET chip 1a after being processed by the conventional apparatus, whereas the PET chip 1a having been processed by the powder removing apparatus had a slight amount. Only 56 ppm of powder 7 had adhered,
314 ppm of the powder 7 corresponding to the difference could be collected, and the mixing of the powder 7 into the PET chip 1a could be greatly reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of use of a powder removing device according to the present invention.

FIG. 2 is an explanatory view showing a powder removing apparatus according to the present invention.

FIG. 3 is an explanatory view showing a powder removing device according to another embodiment.

FIG. 4 is an explanatory view showing a powder removing device according to another embodiment.

FIG. 5 is an explanatory view showing a conventional powder removing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyed object 7 Powder 10 Collision plate 10a Auxiliary collision plate 11 Cylindrical main body 12 Separation chamber 13 Drop supply path 13a Supply cylindrical part 14 Inner cylindrical member 16 Inner peripheral wall of cylindrical main body 19 Gas flow path 20 Discharge path 20a Discharge cylindrical part 22 Outer cylinder member 25b Lower surface of collision plate

Claims (5)

[Claims] 1. A cylindrical main body which internally forms a separation chamber for separating a powder from the conveyed object by introducing a conveyed object having powder adhered to the periphery thereof is provided. A supply tube portion that forms a supply path for dropping the conveyed object with respect to the container; and a lower portion of the supply tube portion for colliding the conveyed object and scattering the powder attached to the surface of the conveyed object. A collision plate is provided. In the gap between the peripheral portion of the collision plate and the inner peripheral wall of the tubular main body, only the fall of the conveyed object is allowed, and the scattered powder is blown into the separation chamber. Forming a gas flow path flowing into the chamber, and disposing a discharge cylinder portion forming a discharge path for discharging the blown-up powder from the separation chamber, concentrically on the outer side of the supply cylinder portion. A device for removing powder attached to a surface, which is connected to the cylindrical main body, Inside the discharge tube portion, a cylindrical partition portion that forms the discharge path with the discharge tube portion is provided, and the partition portion is formed to have a larger diameter than the supply tube portion. An apparatus for removing powder adhering to a surface, the cross-sectional shape of which is substantially equal at any position along the extending direction. 2. The supply cylinder portion is constituted by an inner cylinder member, and the discharge cylinder portion is constituted by an outer cylinder member having a diameter larger than that of the inner cylinder member and an inner peripheral wall of the cylindrical main body. 2. The apparatus for removing surface-attached powder according to 1. 3. The apparatus for removing powder adhering to a surface according to claim 1, wherein an auxiliary collision plate is provided inside the supply cylinder. 4. The apparatus for removing powder adhering to a surface according to claim 1, wherein the collision plate is configured in multiple stages. 5. The apparatus for removing powder adhering to a surface according to claim 4, wherein the lower surface of the multi-stage impact plate is formed as a downward conical surface.