WO2012111237A1 - Projection material separation device, and shot processing device - Google Patents

Abstract

The purpose of the present invention is to provide a projection material separation device which can accurately separate a magnetic projection material and foreign particles, and a shot processing device which is provided with such a separation device. A projection material separation device for a shot processing device is provided with: a sieve means in which holes having a greater diameter than the diameter of a projection material are provided; a cylindrical rotational drum (68) to which a mixture which has passed through the sieve means is supplied; a mixture conveyance path which is provided in a manner so as to terminate close to a position below the rotational centre of the rotational drum; and a magnet (70) which is arranged inside the rotational drum. The projection material separation device is characterised by being provided with a magnetic separator (66) in which the magnet is arranged across a first position which is further to the upstream side in the rotational direction than the position below the rotational centre of the rotational drum, and a second position which is further to the downstream side in the rotational direction than the position below the rotational centre of the rotational drum.

Description

Projection material sorting device and shot processing device

The present invention relates to a projection material sorting device and a shot processing device, and in particular, a projection material sorting device that sorts a projection material from a mixture of a magnetic projection material projected onto a workpiece and a product produced by projection, and the like. The present invention relates to a shot processing apparatus provided with an appropriate sorting apparatus.

In a shot processing apparatus that performs shot processing by projecting a projection material onto a workpiece, the projected projection material is collected and reused from the viewpoints of cost reduction and resource saving. In such collection, it is necessary to separate the reusable projection material and the foreign matter generated by the projection. As an apparatus for separating the projection material and the foreign matter, an apparatus for separating the projection material and the foreign matter using a wind-selective separator is known (Patent Document 1).

Japanese Patent Publication No. 7-3520

However, when a magnetic projection material is used, there is room for improvement in terms of accurately separating the projection material and the foreign material.

It is an object of the present invention to provide a projection material sorting device capable of accurately separating a magnetic projection material and foreign matter, and a shot processing device equipped with such a sorting device.

According to the present invention,
A projection material separation device for a shot processing device,
A sieving means disposed in a transport path of a mixture of a magnetic projection material projected onto a workpiece and a product produced by the projection of the projection material, and provided with a hole having a diameter larger than the diameter of the projection material;
A magnetic separator arranged on the downstream side of the sieving means, a cylindrical shape which is arranged so that its longitudinal axis extends in the horizontal direction and is rotatable in one direction to which the mixture passing through the sieving means is supplied to the outer peripheral surface The rotary drum and a lower position of the rotation center of the rotation drum and a lateral position upstream of the rotation direction extend along the outer peripheral surface of the rotation drum and terminate near the lower position of the rotation center of the rotation drum. A mixture conveyance path provided; and a magnet disposed in the rotary drum so as not to rotate along the inner peripheral surface of the drum, the magnet being upstream in the rotational direction from a position below the rotation center of the rotary drum And a magnetic separator arranged over a second position downstream in the rotational direction from a lower position of the rotation center of the rotating drum,
The non-magnetic material in the mixture transported through the mixture transport path is dropped downward at the end position of the mixture transport path below the rotation center of the rotating drum, and the magnetic material in the mixture is moved by the magnet to the rotating drum. The magnetic projection material is separated from the product by being attracted to the outer peripheral surface and dropped downward at a position downstream of the rotational center of the rotating drum.
There is provided a projection material sorting apparatus characterized by the above.

According to such a configuration, it is possible to separate the magnetic projection material and the non-magnetic foreign matter with a simple structure.

According to another preferred embodiment of the invention,
Distributing means disposed below the rotating drum, provided on the downstream side in the rotation direction from a position below the rotation center of the rotating drum so as to receive the magnetic projection material falling from the outer peripheral surface of the rotating drum. The distribution means is provided.

According to another preferred embodiment of the invention,
Distributing means arranged below the rotating drum, comprising a plate-like member arranged so as to extend along the rotation axis of the rotating drum, the plate-like member having one side edge rotated by the rotating drum A magnetic body is disposed between a lower position of the center and a lower position of the second position, is inclined downward in a direction away from the rotation center of the rotary drum, and receives a magnetic material that has dropped downward at the second position.

According to such a configuration, the magnetic projection material dropped from the rotating drum in the vicinity of the second position can be reliably conveyed to the predetermined path.

According to another preferred embodiment of the invention,
The distribution means includes a bent plate-like member bent convexly upward and extending along the rotation axis of the rotating drum, and the bent portion is located at a position below the rotation center of the rotating drum and the first member. It is arranged between two positions below.

According to such a configuration, the magnetic projection material falling from the rotating drum in the vicinity of the second position is surely prevented from the non-magnetic material falling downward at the end position of the mixture conveyance path below the rotation center of the rotating drum. Can be separated.

According to another preferred embodiment of the invention,
The first position is set radially inward of the position on the outer peripheral surface of the rotary drum to which the mixture from the sieving means is supplied.

According to another preferred embodiment of the invention,
A wind power sorting mechanism is provided on the downstream side of the distributing means to drop a magnetic projection material separated from the product and apply a gas flow.

According to such a configuration, it is possible to separate light and heavy objects in the falling magnetic projection material.

According to another preferred aspect of the present invention, the thickness of the mixture conveyance path in the radial direction of the rotating drum can be adjusted.

According to such a configuration, by adjusting the thickness of the mixture conveyance path in the radial direction of the rotating drum in accordance with the amount, characteristics, etc. of the mixture, the magnetic projection material in the mixture can be reliably secured by the magnetic force of the magnet. Adsorb to the surface of the rotating drum to enable reliable separation.

According to another preferred embodiment of the present invention, the magnet is a permanent magnet.

According to another aspect of the invention,
A shot processing device for projecting a magnetic projection material onto a workpiece,
A transfer device for transferring the workpiece;
A projector that projects a projection material onto the workpiece;
A sieving means disposed in a transport path of a mixture of a magnetic projection material projected onto a workpiece and a product produced by the projection of the projection material, and provided with a hole having a diameter larger than the diameter of the projection material;
A magnetic separator arranged on the downstream side of the sieving means, a cylindrical shape which is arranged so that its longitudinal axis extends in the horizontal direction and is rotatable in one direction to which the mixture passing through the sieving means is supplied to the outer peripheral surface The rotary drum and a lower position of the rotation center of the rotation drum and a lateral position upstream of the rotation direction extend along the outer peripheral surface of the rotation drum and terminate near the lower position of the rotation center of the rotation drum. A mixture conveyance path provided; and a magnet disposed in the rotary drum so as not to rotate along the inner peripheral surface of the drum, the magnet being upstream in the rotational direction from a position below the rotation center of the rotary drum And a magnetic separator arranged over a second position downstream in the rotational direction from a lower position of the rotation center of the rotating drum,
The non-magnetic material in the mixture transported through the mixture transport path is dropped downward at the end position of the mixture transport path below the rotation center of the rotating drum, and the magnetic material in the mixture is moved by the magnet to the rotating drum. The magnetic projection material is separated from the product by being attracted to the outer peripheral surface and dropped downward at a position downstream of the rotational center of the rotating drum.
A shot processing apparatus is provided.

According to another preferred embodiment of the invention,
The workpiece is an electrode bar including impurities made of a non-magnetic material on the surface side.

According to another aspect of the invention,
Provided in a recovery path for recovering the projection material made of a magnetic material that is projected onto the object to be processed, and a plurality of holes having a diameter larger than the diameter of the projection material are formed, and the shaft is formed into a cylindrical shape. A sieve body that is driven to rotate around, and the mixture containing the recovered projection material and powdered foreign matter is flown into the inside of the sieve body, and the sieve body rotates around an axis so that the mixture is rotated. A rotary sieve that removes foreign matters having a diameter larger than that of the hole while rolling
A first rotary drum that is disposed in a path through which the mixture that has passed through the hole of the rotary sieve is conveyed, has a cylindrical shape, is driven to rotate about its axis, and is supplied to the outer surface side of the mixture; A first magnetic separator that is eccentrically arranged in the first rotating drum and is non-rotatable, and that separates and discharges a part of the mixture by the magnetic force of the first magnet;
The first magnetic separator is arranged in a path along which the mixture that is not adsorbed by the magnetic force of the first magnet is transported, has a cylindrical shape, is rotated around its axis, and is supplied to the outer surface side. A second rotating drum, and a second magnet that is eccentrically arranged in the second rotating drum so as not to rotate, and a part of the mixture is adsorbed by the magnetic force of the second magnet and separated and discharged. A second magnetic separator,
A shot processing apparatus is provided.

According to another preferred embodiment of the invention,
A transfer device for transferring the object to be processed;
A projector that projects a projection material onto the object to be processed;
A blowing port is disposed downstream of the projector in the conveyance direction of the object to be processed and above the conveyance path of the object to be processed, and is capable of blowing gas toward the object to be processed. And a dropping device.

According to the present invention, there is provided a projection material sorting device capable of accurately separating a magnetic projection material and a foreign material, and a shot processing device equipped with such a sorting device.

It is a front view of a shot blasting device of an embodiment of the present invention. It is a right view of the shot blasting apparatus of the embodiment of the present invention. 1 is a plan view of a shot blasting apparatus according to an embodiment of the present invention. It is a figure which shows the rotary screen used with the shot blasting apparatus of embodiment of this invention, (A) is a front view, (B) is a right view which fractures | ruptures the principal part, (C) is a rear view. is there. It is a longitudinal cross-sectional view of the front view which shows the 1st separator used with the shot blasting apparatus of embodiment of this invention. It is a lineblock view lineblock diagram showing the 1st separator used with a shot blasting device of an embodiment of the present invention.

Hereinafter, a shot processing apparatus 10 according to a preferred embodiment of the present invention will be described with reference to the drawings. The shot processing apparatus 10 of this embodiment is a shot blasting apparatus. In these drawings, the arrow FR indicates the front side of the apparatus when viewed from the front, the arrow UP indicates the upper side of the apparatus, and the arrow LH indicates the left side of the apparatus when viewed from the front.

FIG. 1 is a front view of the shot blasting apparatus 10, FIG. 2 is a right side view of the shot blasting apparatus 10, and FIG. 3 is a plan view of the shot blasting apparatus 10.
The work 12 of the shot blasting apparatus 10 of this embodiment is a cylindrical electrode rod. The electrode rod of the workpiece 12 contains impurities made of a nonmagnetic material on the surface side. The present invention can also be applied to shot processing apparatuses that process workpieces having other shapes.

As shown in FIG. 1, the shot blasting apparatus 10 includes a cabinet 14. In the cabinet 14, a roller conveyor 16 is provided as a transport device that transports the workpiece 12. The roller conveyor 16 is disposed so as to penetrate the cabinet 14, and the rollers of the roller conveyor 16 are arranged at predetermined intervals along the transport direction (arrow X direction), and are rotationally driven by a driving mechanism (not shown). (See FIG. 3).

A projection chamber 14A for blasting the workpiece 12 by projecting a projection material onto the workpiece 12 is provided inside the cabinet 14, and a plurality of projection chambers 14A arranged with a conveyance path for the workpiece 12 interposed therebetween. There are provided projectors 18 (total of eight projectors in this embodiment).

In the present embodiment, the projector 18 is a centrifugal projector, and projects the projection material (shot) accelerated by the rotation of the impeller (impeller) onto the workpiece 12 conveyed in the projection chamber 14A. . In this embodiment, a steel ball having a diameter of about 1.7 to 2 mm is used as the projection material. In addition, this invention is applicable also when using the steel ball of another dimension, and the projection material of another magnetic body.

The spray port 20C of the blow-off device 20 is disposed above the transport path of the work 12 on the downstream side in the work 12 transport direction of the projector 18. The blow-off device 20 includes a blower fan 20 </ b> A provided at the upper part of the cabinet 14. The blower fan 20A is connected to a duct 20B. A blowing port 20C is formed at the lower end of the duct 20B, and the blowing port 20C is directed to the roller conveyor 16. As a result, when the blower fan 20 </ b> A is activated, gas toward the work 12 is blown.

On the other hand, the projector 18 is provided with an introduction pipe 22 from above, and the upper end of the introduction pipe 22 is connected to a shot tank 24 for storing the projection material. As a result, the projector 18 is connected to the circulation device 26 via the introduction pipe 22 and the shot tank 24. The circulation device 26 is a device for collecting the projection material projected by the projector 18 and circulating it to the projector 18, and includes H2 conveyors 28A, 28B, 28C provided below the roller conveyor 16. .

The screw conveyors 28 </ b> A and 28 </ b> B are horizontally arranged with the conveying direction of the workpiece 12 as a longitudinal direction, and are a mixture of a projection material projected on the workpiece 12 and foreign matter (product by projection) separated from the workpiece 12 by projection. Projecting material, etc.) is transported to the center side in the lateral direction of the apparatus.

Further, the screw conveyor 28C is provided below the screw conveyors 28A and 28B, and is disposed horizontally with the direction orthogonal to the conveying direction of the workpiece 12 as the longitudinal direction, and the projection material or the like is directed toward the front side of the apparatus. It is designed to be transported.

As shown in FIG. 2, the lower end side of the bucket elevator 30 extending in the vertical direction of the apparatus is disposed on the downstream side (left side in FIG. 2) of the screw conveyor 28C in the transport direction. The bucket elevator 30 includes pulleys (not shown) disposed on the upper and lower portions of the shot blasting apparatus 10, an endless belt (not shown) wound around these pulleys, and a number of buckets ( (Not shown).

The bucket elevator 30 is configured to scoop up the projection material and the like collected by the screw conveyor 28 </ b> C by a pulley and drive it upward with a bucket.
As shown in FIG. 1, the upper portion of the bucket elevator 30 communicates with one end of the screw conveyor 34 via a chute 32 (throwing chute).

The screw conveyor 34 is covered with a cylindrical screw conveyor case 36 and is horizontally disposed so as to extend in a direction perpendicular to the conveying direction of the workpiece 12 as shown in FIG.
The screw conveyor 34 includes a shaft 34A and screw leads 34B arranged in a spiral shape on the outer peripheral side of the shaft 34A, and can be driven to rotate by a drive mechanism (not shown) including a drive motor. With such a configuration, the screw conveyor 34 conveys the projection material and the like thrown in from the upper part of the bucket elevator 30 through the chute 32 to the back side of the apparatus (the direction toward the right side in FIG. 2).

As shown in FIG. 4, a powder separation device 40 is provided on the downstream side of the screw conveyor 34. The particle separator 40 includes a rotary screen (rotating sieve) 42, a first separator 50, a second separator 52, and a third separator 47 (see FIG. 2). The rotary screen 42 and the like are provided in a collection path for collecting the projection material projected on the workpiece 12 (see FIG. 1).

As shown in FIG. 4B, the rotary screen 42 includes a cylindrical sieve body 42A that is concentrically arranged with respect to a shaft extension 42C that is an extension of the shaft 34A of the screw conveyor 34. . The inner diameter of the sieve main body 42A is slightly larger than the outer diameter of the screw conveyor case 36, and the end of the screw conveyor case 36 is connected to one end of the sieve main body 42A in a nested manner. As a result, the mixture containing the recovered projection material and powdered foreign matter flows into the sieve main body 42A from the screw conveyor 34 side.

The sieve body 42A has a plurality of holes 42B having a diameter larger than the diameter of the projection material over substantially the entire surface. In the present embodiment, the diameter of the hole 42B is about 8 mm. In addition, you may provide the hole part of another diameter by the relationship with the diameter etc. of the steel ball which is a projection material. Further, the screen main body 42A has a spiral screw lead 42D formed on the inner peripheral surface thereof, and the connecting portion 43 on one end side is connected to the shaft extension portion 42C.

As the screw conveyor 34 is driven to rotate, the shaft extension 42C rotates, and the sieve body 42A is driven to rotate about the axis. The connecting portions 43 are provided at both ends in the axial direction of the shaft extension portion 42C. Each connecting portion 43 extends in the radial direction from the shaft extension portion 42C toward the sieve body 42A, and the sieve body 42A is connected to the shaft extension portion 42C. A plurality of connecting brackets 43A are attached.

When the sieve body 42A rotates around the axis, the mixture is conveyed in a predetermined direction (right direction in the drawing) in the sieve body 42A by the screw lead 42D, and the hole 42B formed in the sieve body 42A during this conveyance. The smaller-diameter projection material is discharged to the outside of the sieve main body 42A through the hole 42B, and is separated from foreign matters having a diameter larger than that of the hole 42B.

A roughing pipe 46 for discharging foreign matters having a diameter larger than that of the hole 42B is disposed on the lower side of the sieve body 42A on the most downstream side in the conveying direction. In the present embodiment, the large foreign matter is a non-magnetic impurity (breeze) that has fallen off the electrode rod.

As shown in FIG. 2, a distribution box 45 is disposed in the middle of the roughing pipe 46, and a predetermined slit (in order to flow powder less than a predetermined value to the third separator 47 in the distribution box 45. (Not shown) is formed. The third separator 47 separates the projection material and foreign matters such as breeze.

The third separator 47 has the same configuration as a first separator 50 and a second separator 52 described later. Further, the roughing pipe 46 communicates with a recovery hopper 49 disposed at the lower part of the apparatus, and foreign matter (breeze or the like) is accumulated in the recovery hopper 49 and discarded.

As shown in FIG. 4B, a spiral screw lead 42E is attached to the outer periphery of the sieve main body 42A, and a rotary member separate from the sieve main body 42A is further provided on the outer peripheral side of the screw lead 42E. A screen case 44 is provided.

With such a configuration, the mixture discharged through the hole 42B of the sieve body 42A and discharged to the outside of the sieve body 42A passes through the annular space between the outer peripheral surface of the sieve body 42A and the rotary screen case 44 in the screw. It is conveyed in a predetermined direction (right direction in the figure) by the lead 42E.

Two discharge ports 44 </ b> A arranged in the longitudinal direction are formed at the bottom of the rotary screen case 44. Furthermore, a first separator 50 and a second separator 52 are disposed below the rotary screen case 44.
The first separator 50 and the second separator 52 open upward, and communicate with the inside of the rotary screen case 44 through a discharge port 44 </ b> A formed at the bottom of the rotary screen case 44.

FIG. 5 shows the overall configuration of the first separator 50. In the following description, a direction perpendicular to the paper surface of FIG. 5 is referred to as a separator width direction. Further, “right side in the apparatus left-right direction” is simply referred to as “right side”, and “left side in the apparatus left-right direction” is simply referred to as “left side”.
The second separator 52 (see FIG. 4) has the same device configuration although the arrangement position is different from that of the first separator 50, so the detailed description of the second separator 52 (see FIG. 4) is omitted. In FIG. 4A, the same components as those of the first separator 50 are denoted by the same reference numerals.

As shown in FIG. 5, the first separator 50 includes a housing portion 54 that forms a space. An open supply gate 56 is provided on the upper portion of the housing portion 54. The supply gate 56 keeps the supply amount of the mixture such as the projection material flowing from above within the range of the processing capacity amount of the first separator 50. The supply gate 56 is provided with a pair of first guide plates 58A that form a guide passage. The pair of first guide plates 58A are opposed to each other and are inclined to the lower left side. At a position including the lower side of the pair of first guide plates 58A, a second guide plate 58B is disposed slightly apart from the first guide plate 58A. The second guide plate 58B includes an inclined portion 58B1 that is inclined to the lower right side, a horizontal portion 58B2 that is bent from the lower end portion of the inclined portion 58B1 to the right side and is disposed in the horizontal direction, and further, the right end of the horizontal portion 58B2. A drooping portion 58B3 hanging downward from the portion is provided.

A swing plate 60 is disposed on the right side of the first guide plate 58A on the substantially upper side of the hanging portion 58B3 of the second guide plate 58B. The deflection plate 60 is a plate-like member that is long in the separator width direction (a direction perpendicular to the paper surface of FIG. 5), and is attached to a bracket (not shown) whose upper end is fixed to the housing portion 54 via a pin 57. It can be rotated around the pin 57. The lower end portion of the swing plate 60 is bent to the right side, and the swing plate 60 is formed in a substantially L shape in front view as a whole.

In the state where the mixture is not supplied from the supply gate 56, the swing plate 60 is in a suspended posture, and the lower end portion is disposed close to the tip of the horizontal portion 58B2 of the second guide plate 58B, and the mixture is supplied from the supply gate 56. In the state, the mixture is rotated by the pressing force of the mixture to form a gap with the second guide plate 58B. A stopper 59 for restricting the rotational movement amount of the deflection plate 60 is provided on the right side of the deflection plate 60. As a result, the deflection plate 60 functions as a regulating plate for regulating the thickness of the mixture layer supplied from the supply gate 56, and sufficiently spreads the mixture in the separator width direction (direction perpendicular to the paper surface of FIG. 5). And with a uniform layer thickness, it is discharged downstream.

The upper end portion of the third guide plate 58C is connected to the hanging portion 58B3 of the second guide plate 58B. The third guide plate 58C includes a hanging portion 58C1 that hangs downward, and an inclined portion 58C2 that is inclined from the lower end portion of the hanging portion 58C1 to the lower left side. At a position including the lower side of the inclined portion 58C2 in the third guide plate 58C, the gap adjusting plate 62 is disposed in parallel with the inclined portion 58C2. The gap adjustment plate 62 is fixed to a bracket 64 fixed to the housing portion 54, and is located in a vertical position (a position in a direction facing the inclined portion 58C2) and a horizontal position (an oblique direction along its own inclination direction). Position) can be adjusted. The gap adjusting plate 62 and the inclined portion 58C2 of the third guide plate 58C form a supply gap adjusting gate.

A first magnetic separator 66 (first magnet separator) is disposed on the left side of the gap adjusting plate 62 and the third guide plate 58C. The first magnetic separator 66 is arranged in a path through which the mixture that has passed through the hole 42B of the rotary screen 42 shown in FIG. 4B is discharged.

As shown in FIG. 5, the first magnetic separator 66 includes a cylindrical first rotating drum 68. In this embodiment, the drum is made of stainless steel. The first rotating drum 68 is arranged with the separator width direction (direction perpendicular to the paper surface of FIG. 5) as the axial direction, and is connected to the rotating shaft of the driving motor 69 (see FIG. 6) via a driving force transmission mechanism. The drive motor 69 (see FIG. 6) is rotated in the clockwise direction in FIG. 5 about the axis.

The mixture is supplied to the outer surface of the first rotating drum 68 from between the gap adjusting plate 62 and the inclined portion 58C2 of the third guide plate 58C from approximately the 2 o'clock direction. In addition, a plurality of square bar-shaped protrusions 68A extending in the drum axial direction (two in total in the present embodiment at positions 180 ° apart in the drum circumferential direction) are formed on the outer surface side of the first rotating drum 68. ing. These protrusions 68A function as feed members for the supplied mixture.

In the first rotating drum 68, a first magnet 70 (first magnet) is eccentrically disposed so as not to rotate. Specifically, the first magnet 70 is fixedly disposed along the inner peripheral surface of the first rotating drum 68 so as not to rotate with the first rotating drum 68.

The first magnet 70 is a permanent magnet, and is predetermined along the inner periphery of the first rotating drum 68 from the vicinity of the portion of the first rotating drum 68 facing the gap adjusting plate 62 and the inclined portion 58C2 of the third guide plate 58C. Are arranged over an angular range (range corresponding to about the lower half of the first rotating drum 68).

Specifically, as shown in FIG. 5, the first magnet 70 includes a first position (substantially two o'clock position) on the upstream side of the rotation center of the first rotation drum 68 and a rotation drum. Are arranged continuously over a second position (position at 8 o'clock) on the downstream side in the rotation direction from a position below the rotation center.
This first position is located radially inward of the position on the outer peripheral surface of the first rotating drum 68 to which the mixture is supplied from between the gap adjusting plate 62 and the inclined portion 58C2 of the third guide plate 58C. .

The first magnet 70 may be arranged so as to continuously exert a magnetic force on the magnetic projection material located on the outer peripheral surface of the first rotating drum 68, and is physically arranged continuously. There is no need.

Thereby, the first magnetic separator 66 is a magnetic projection material included in the mixture supplied to the outer peripheral surface of the first rotating drum 68 from between the gap adjusting plate 62 and the inclined portion 58C2 of the third guide plate 58C. Is attracted to the outer peripheral surface of the first rotary drum 68 by the magnetic force of the first magnet 70, conveyed by the rotation of the first rotary drum 68, and projected at a position where the magnetic force does not reach the projection material downstream of the second position. The material is configured to drop from the outer peripheral surface of the first rotary drum 68.

Below the first rotating drum 68, a fourth guide plate 58D as a distributing means is arranged. The fourth guide plate (bent plate-like member) 58D is shifted slightly to the right side from the lower end of the left end of the first rotating drum 68 (that is, the position between the second position and the lower position of the rotation center of the rotating drum). And a bent portion 58D2 that is bent so as to protrude upward.

In the fourth guide plate 58D, the inclined portion 58D1 on the left side of the bent portion 58D2 is inclined to the lower left side, and the inclined portion 58D3 on the right side of the bent portion 58D2 is inclined to the lower right side. The magnetic projection material that is attracted by the magnetic force of the first magnet 70 in the first magnetic separator 66 and then dropped at a position where the magnetic force does not reach the projection material downstream of the second position is inclined by the fourth guide plate 58D. It flows along the part 58D1.

In the first magnetic separator 66, a regulating member 72 is provided at a position from the right side to the lower side of the first rotary drum 68 on the outer side in the radial direction of the outer peripheral surface of the first rotary drum 68. It is arranged to face the surface. The regulating member 72 defines the thickness of the mixture conveyance path formed between the outer surface of the first rotating drum 68 and thereby the thickness of the mixture layer supplied to the outer surface side of the first rotating drum 68. Regulates.

In this embodiment, the restricting member 72 includes an inner plate 74 disposed on the first rotating drum 68 side and an outer plate 76 superimposed on the lower right side of the inner plate 74. The restricting member 72 is configured to include the inner plate 74 as a replacement that can be attached to and detached from the outer plate 76 because the mixture supplied to the outer surface side of the first rotary drum 68 is expected to wear. ing.

The inner plate 74 has a circular arc shape and is disposed to face the outer surface of the first rotating drum 68, and a main body portion 74 </ b> A that defines a mixture transport path between the inner plate 74 and the outer surface of the first rotating drum 68. Are provided with flange portions 74B bent so as to be separated from both ends in the arc direction toward the opposite side to the first rotating drum 68 side.

The inner plate 74 and the outer plate 76 terminate near the lower position of the rotation center of the first rotary drum 68. As a result, the mixture conveyance path formed between the outer surface of the first rotary drum 68 also rotates in the first rotation. It terminates near the position below the rotation center of the drum 68.

The inner plate 74 and the outer plate 76 terminate upstream from the position below the rotation center of the first rotary drum 68, and as a result, the mixture conveyance path formed between the outer surface of the first rotary drum 68. Alternatively, it may be configured to terminate on the upstream side (right side in the drawing) from the position below the rotation center of the first rotary drum 68.

The outer plate 76 includes a main body portion 76A that is overlapped with the main body portion 74A of the inner plate 74 at a slight interval, and includes a flange portion 76B that is bolted to the flange portion 74B of the inner plate 74. An attachment piece 76C bent to the right side on both sides in the separator width direction of the portion 76A (direction perpendicular to the paper surface of FIG. 5) is provided.

The attachment piece 76 </ b> C is formed in an arc belt shape, and the upper end portion of the attachment piece 76 </ b> C is attached to an attachment portion provided on the vertical wall portion of the housing portion 54 with a pin 75. The pin 75 has the separator width direction as the axial direction. The outer plate 76 can be rotated around the axis of the pin 75.

Further, the arcuate intermediate portion of the attachment piece 76C is attached to the tip attachment portion 78A of the shaft 78 by a pin 77 whose axial direction is the same direction as the pin 75, and the shaft of the pin 77 is connected to the tip attachment portion 78A. It can be rotated around. The base end portion of the shaft 78 passes through the vertical wall portion of the housing portion 54. A male screw portion (not shown) is formed on the outer periphery of the shaft 78 on the base end portion side, and is screwed to a nut 80 that is rotatably attached to the vertical wall portion of the housing portion 54. Therefore, when the nut 80 is rotated about its axis, the shaft 78 is displaced in the left-right direction of the apparatus, and the outer plate 76 and the inner plate 74 fixed thereto are rotated and moved around the pin 75 in conjunction with this. It has become. In other words, the inner plate 74 can adjust the gap (the thickness of the mixture transport path) between the main body 74A and the first rotating drum 68.

The lower side of the lower end portion of the regulating member 72 is disposed with an intermediate portion in the inclined direction of the inclined portion 58D3 of the fourth guide plate 58D. For this reason, the mixture that is not adsorbed by the magnetic force of the first magnet 70 in the first magnetic separator 66 flows down from the regulating member 72 and flows to the lower right side along the inclined portion 58D3 of the fourth guide plate 58D.

From the lower end side of the inclined portion 58D3, a convex arc portion 58D4 is extended to the lower left side. A second magnetic separator 82 (second magnet separator) is disposed on the right side of the lower end portion of the inclined portion 58D3 and the arc portion 58D4. Further, an attachment portion 88A of a regulating member 88 (gap adjustment plate) is attached to the lower end portion of the inclined portion 58D3, and the main body portion 88B that is bent and extended from the attachment portion 88A in the regulating member 88 is The arc shape is substantially along the upper end portion of the arc portion 58D4, and is disposed between the upper end portion of the arc portion 58D4 and the second magnetic separator 82.

The regulating member 88 is provided on the outer peripheral side of the second rotating drum 84 in the second magnetic separator 82, is disposed to face the second rotating drum 84, and is a mixture layer supplied to the outer surface side of the second rotating drum 84. The thickness of the is to be regulated. As described above, the second magnetic separator 82 is disposed in a path through which the mixture that is not adsorbed by the magnetic force of the first magnet 70 in the first magnetic separator 66 is discharged.

In the first separator 50, the first to sixth guide plates 58A to 58F, the deflection plates 60 and 92, the gap adjusting plate 62, the regulating member 72, the regulating member 88, the first magnetic separator 66, and the second magnetic separator. Each of the machines 82 extends in the separator width direction (direction perpendicular to the paper surface of FIG. 5), and both end portions of each separator width direction are disposed on both sides of the housing portion 54.

The second magnetic separator 82 includes a cylindrical second rotating drum 84. The axial direction of the second rotary drum 84 is set parallel to the axial direction of the first rotary drum 68, and is connected to the rotary shaft of the drive motor 85 (see FIG. 6) via a drive force transmission mechanism. . That is, the second rotating drum 84 is driven to rotate counterclockwise in FIG. 5 by the rotation of the drive motor 85 (see FIG. 6).

On the outer surface side of the second rotating drum 84, the mixture that has not been adsorbed by the magnetic force of the first magnet 70 by the first magnetic separator 66 passes on the inclined portion 58D3 of the fourth guide plate 58D and on the regulating member 88. Thus, it is supplied from the direction of approximately ten times.

On the outer surface side of the second rotary drum 84, a plurality of square bar-shaped protrusions 84A extending in the drum axial direction (two in total in the present embodiment at positions 180 ° apart in the drum circumferential direction) are formed. . These protrusions 84A function as a feeding member for the supplied mixture.

In the second rotating drum 84, a second magnet 86 (second magnet) is eccentrically disposed and is non-rotatable like the first magnet 70.

Specifically, the second magnet 86 is fixedly disposed along the inner peripheral surface of the second rotary drum 84 so as not to rotate with the second rotary drum 84.

The second magnet 86 is a permanent magnet, and has a predetermined angular range (first angle) along the inner periphery of the second rotary drum 84 from the vicinity of the portion of the second rotary drum 84 facing the upper end of the main body 88B of the regulating member 88. The two-rotating drum 84 is disposed over a range corresponding to a portion from the left side to the lower side. As a result, the second magnetic separator 82 can adsorb a part of the supplied mixture by the magnetic force of the second magnet 86 and separate and discharge it on the lower right side of the second magnetic separator 82.

Specifically, as shown in FIG. 5, the second magnet 86 has a first position (substantially 11) upstream in the rotational direction (counterclockwise direction) from the lower position of the rotation center of the second rotary drum 84. And a second position (substantially at the 5 o'clock position) downstream in the rotational direction from the position below the rotation center of the rotating drum.

The fourth guide plate 58D includes a drooping portion 58D5 that hangs downward from the lower end of the arc portion 58D4 at a position slightly shifted to the left side from the lower side of the central axis position of the second rotating drum 84. The upper end of the drooping portion 58D5 is connected to the arc portion 58D4 on the upstream side in the rotational direction from the center of the second rotary drum 84. A through hole 55 for piping an air suction duct 90 is formed in the hanging portion 58D5, and the lower end portion of the hanging portion 58D5 reaches the bottom portion of the housing portion 54.

Further, a fifth guide plate 58E is disposed on the upper right side of the hanging part 58D5. The fifth guide plate 58E includes an inclined portion 58E1 that is inclined to the lower right side, and an attachment portion 58E2 that is bent to the right side from the lower end portion of the inclined portion 58E1 and is fixed to the upper side of the duct 90. The tip of the fifth guide plate 58E is disposed upstream of the rotational center of the second rotary drum 84 in the rotational direction.

Between the tip of the fifth guide plate 58E and the hanging portion 58D5 of the fourth guide plate 58D is a passage for sand powder or the like that was not adsorbed by the magnetic force of the second magnet 86 in the second magnetic separator 82, and the housing It leads to a pipe 112 connected to the bottom of the section 54. This pipe 112 leads to the recovery hopper 49 (see FIG. 2).

Further, the right side of the inclined portion 58E1 of the fifth guide plate 58E is a passage made of iron powder or the like adsorbed by the magnetic force of the second magnet 86 in the second magnetic separator 82, and is connected to the bottom of the housing portion 54. To the pipe 110. The pipe 110 communicates with a collection receiving box (not shown). In addition, as the structure which re-sorts the iron powder (projection material) etc. in a collection receptacle, and flows the granular material judged to be a projection material to the screw conveyor 28C via the overflow part 27 of the circulation apparatus 26 shown by FIG. Also good.

On the other hand, as shown in FIG. 5, a deflection plate 92 is disposed on the left side of the inclined portion 58D1, which is the upper side of the fourth guide plate 58D. The deflection plate 92 is a plate-like member that is long in the separator width direction (perpendicular to the paper surface of FIG. 5), and is attached to a bracket (not shown) whose upper end is fixed to the housing portion 54 via a pin 93. It can be rotated around the pin 93. The axial direction of the pin 93 is set parallel to the axial direction of the first rotary drum 68 and the second rotary drum 84.

The lower end portion of the deflection plate 92 is bent to the left, and the deflection plate 92 is formed in a substantially inverted L shape as a whole when viewed from the front. The swing plate 92 is in a suspended position when the projection material or the like does not flow out from the left end side of the first magnetic separator 66, and the lower end thereof is in contact with the lower end of the inclined portion 58D1 of the fourth guide plate 58D. In a state where the projection material or the like has flowed out from the left end side, a gap is formed between the fourth guide plate 58D and the rotational movement by the pressing force of the projection material or the like. Accordingly, the deflection plate 92 functions as a regulating plate for making the thickness of the layer of the projection material and the like flowing out from the left end side of the first magnetic separator 66 uniform, and the projection material and the like are arranged in the separator width direction (in FIG. 5). Widely spread in the direction perpendicular to the paper surface and discharged downstream with a uniform layer thickness.

The fourth guide plate 58D includes a hanging portion 58D0 that is hung downward from the lower end of the inclined portion 58D1. A receiving box 94 is attached to the left side of the lower end portion of the hanging portion 58D0. The receiving box 94 is a temporary storage unit that receives and stores the projection material and the like so as not to be worn. Further, a sixth guide plate 58F fixed to the housing portion 54 side is disposed on the left side of the receiving box 94. The sixth guide plate 58F is inclined to the lower right side and the tip end side is on the receiving box 94 side. It is fixed to. That is, the projection material and the like that have passed between the deflection plate 92 and the inclined portion 58D1 of the fourth guide plate 58D are configured to be accommodated in the receiving box 94. A discharge width adjusting gate 96 is provided at the discharge port at the bottom of the receiving box 94 so as to adjust the discharge from the receiving box 94.

An opening 98 is formed through the vertical wall on the left side of the housing portion 54 below the attachment portion of the sixth guide plate 58F. On the lower side of the sixth guide plate 58F, the receiving box 94, and the fourth guide plate 58D, an air flow path 102 communicating from the opening 98 to the duct 90 is formed.

The duct 90 is a suction duct that communicates with the intake side of the dust collector 104 via the merging duct 114 shown in FIG. The dust collector 104 includes suction means (blower) for sucking air, and the air flow path shown in FIG. 5 inside the first separator 50 via the merging duct 114 and the duct 90 when the suction means is operated. An airflow A is generated in 102. In FIG. 5, the air flow generated in the inside of the duct 90 from the vicinity of the entrance of the duct 90 is indicated by a symbol B.

As shown in FIG. 5, a discharge adjustment gate 116 is provided below the hanging portion 58D0 of the fourth guide plate 58D. In addition, a projection part carrying-out pipe part 106 is attached to the bottom part of the housing part 54 below the receiving box 94 and communicates with the inside of the housing part 54. The pipe portion 106 is connected to the shot tank 24 shown in FIG. 1, and usable projection material is supplied to the shot tank 24 through the pipe portion 106.

Further, as shown in FIG. 5, a pipe portion 108 for carrying out fine powder is attached to the bottom of the housing portion 54 on the lower side near the duct 90 of the air flow path 102. The pipe part 108 leads to a collection receiving box (not shown).

The wind sorting mechanism 100 is constituted by the air flow path 102 and the like. That is, the wind power selection mechanism 100 naturally drops the mixture adsorbed and separated and discharged by the magnetic force of the first magnet 70 in the first magnetic separator 66, and generates an airflow A substantially orthogonal to the dropping direction with respect to the mixture. By doing so, it sorts into a lightweight object put on the airflow A and a heavy object that falls (usable projection material).

Next, the operation of the shot blast processing apparatus 10 of this embodiment will be described.
In the shot blasting apparatus 10 according to the present embodiment, the workpiece 12 shown in FIG. 1 is conveyed by a roller conveyor 16, and a projection material made of a magnetic material is projected by a projector 18.

The mixture of the projected blast material and the foreign matter released from the workpiece 12 by the projection falls to the lower side of the apparatus and is collected by the screw conveyors 28A and 28B. Further, the projection material and foreign matters remaining on the workpiece 12 after the projection are also blown off by blowing the gas by the blow-off device 20, dropped to the lower side of the device, and collected by the screw conveyor 28 </ b> B.

The mixture recovered by the screw conveyors 28A and 28B is conveyed through the screw conveyor 28C, the bucket elevator 30, the chute 32, the screw conveyor 34, and the like into the sieve main body 42A of the rotary screen 42 shown in FIG.

The mixture rolls by the rotation of the sieve body 42A, and the projection material having a smaller diameter than the hole 42B of the sieve body 42A is discharged to the outside of the sieve body 42A, and is separated from the breeze that is a foreign substance having a larger diameter than the hole 42B. Is done.

Further, the projection material having a smaller diameter than the hole 42B is discharged to the supply gate 56 (see FIG. 5) side of the first separator 50 and the second separator 52.

The mixture that has passed through the supply gate 56 pushes open the swing plate 60 through the first guide plate 58A and the second guide plate 58B, passes between the third guide plate 58C and the gap adjusting plate 62, and in the separator width direction. In a state where the layer is sufficiently spread (in a direction perpendicular to the paper surface of FIG. 5), it is supplied to the outer surface side of the first rotating drum 68 in the first magnetic separator 66. Since the first magnet 70 is eccentrically disposed in the first rotating drum 68 so as not to rotate, when the first rotating drum 68 is driven to rotate, a magnetic projection material or the like that is a part of the mixture is After being attracted by the magnetic force of the first magnet 70, it is discharged in the left end area of the drum where the magnetic force of the first magnet 70 does not reach.

Here, in the present embodiment, the thickness of the layer of the mixture supplied to the outer surface side of the first rotating drum 68 with the regulating member 72 facing the outer peripheral side of the first rotating drum 68 in the first magnetic separator 66. It regulates. For this reason, when the mixture containing the projecting material is supplied to the outer surface side of the first rotating drum 68, the projecting material made of a granular magnetic material is separated from the outer surface side of the first rotating drum 68 and the first magnet 70. The situation of not being adsorbed by the magnetic force is prevented or suppressed.

The projection material and the like separated and discharged by the first magnetic separator 66 passes over the inclined portion 58D1 of the fourth guide plate 58D, pushes the swing plate 92 open, is temporarily stored in the receiving box 94, and then is naturally dropped. During the fall, a light object placed on the airflow A and a heavy object falling by causing the airflow A substantially orthogonal to the naturally dropped mixture by suction from the dust collector 104 (see FIG. 1) side. (Usable projection material).

That is, the lightweight object put on the airflow A is flowed to the dust collector 104 (see FIG. 1) side through the duct 90 and the like, and the falling heavy object (usable projection material) passes through the pipe portion 106 to the shot tank. 24. In addition, the particulate matter that falls while being placed in the airflow A passes through the pipe portion 108 and flows into a collection receiving box (not shown).

Here, the target to be sorted by the wind power sorting mechanism 100 is only the granular material made of the magnetic material that is attracted and separated and discharged by the magnetic force of the first magnet 70 in the first magnetic separator 66. Are selected with high accuracy. Moreover, the object carried by the wind force and flowing to the dust collector 104 (see FIG. 1) can also be only a powdery material made of a magnetic material.

On the other hand, the mixture that is not adsorbed by the magnetic force of the first magnet 70 in the first magnetic separator 66 passes on the inclined portion 58D3 of the fourth guide plate 58D and on the regulating member 88, and the second rotating drum 84 in the second magnetic separator 82. Is supplied to the outer surface side. The supplied mixture becomes a thin uniform layer on the outer surface side of the second rotating drum 84 by the main body portion 88B of the regulating member 88. Since the second magnet 86 is eccentrically disposed in the second rotating drum 84 so as not to rotate, when the second rotating drum 84 is driven to rotate, a granular material made of a magnetic material (a part of the mixture ( The particulate matter that could not be adsorbed by the magnetic force of the first magnet 70) is adsorbed by the magnetic force of the second magnet 86 and then discharged in the right end area of the drum where the magnetic force of the second magnet 86 does not reach.

As described above, in the second magnetic separator 82, only the fine mixture after being separated and removed by the rotary screen 42 and the first magnetic separator 66 is selected, so that the magnetic substance is composed of powder and non-magnetic material. The granular material is separated with high accuracy. Then, the object that is attracted and separated and discharged by the magnetic force of the second magnet 86 flows through the pipe 110 to a collection box (not shown), and the object that is not attracted by the magnetic force of the second magnet 86 is the pipe. It flows through 112 to the recovery hopper 49 (see FIG. 2).

As described above, according to the shot blasting apparatus 10 according to the present embodiment, the projection material and the foreign matter can be separated with high accuracy. As a result, mixing of foreign matter (breeze) into the circulated projection material is effectively suppressed, so that the projection efficiency is improved compared to the case where foreign matter (breeze) is mixed into the circulated projection material to some extent. Can be improved.

The present invention is not limited to the above-described embodiment, and various changes and modifications can be made within the scope described in the claims.

In the above embodiment, the fourth guide plate 58D, which is a bent plate member, is disposed as the distributing means below the first rotating drum. However, in the present invention, distributing means having other configurations can be employed. . For example, it is possible to use a sorting means including only the inclined portion 58D1 on the left side of the fourth guide plate 58D.

Furthermore, it is provided downstream in the rotational direction from the lower position of the rotation center of the first rotary drum so as to receive the magnetic projection material falling from the outer peripheral surface of the first rotary drum, and falls from the outer peripheral surface of the first rotary drum. Other plate-like members, guide members and the like that guide the magnetic body in a predetermined direction can also be used as the sorting means.

In the above embodiment, the shot blasting apparatus 10 includes the wind sorting mechanism 100, but may be configured not to include the wind sorting mechanism.

In addition, instead of the wind sorting mechanism 100 of the above-described embodiment, the wind sorting mechanism, for example, naturally drops the mixture that is attracted and separated and discharged by the magnetic force of the first magnet 70 in the first magnetic separator 66 and the mixture. It may be another wind sorting mechanism such as a wind sorting mechanism that sorts a lightweight object placed on the air stream and a falling heavy object (usable projection material) by applying an upward air stream to the air.

In addition, the light weight that can be put on the airflow by naturally dropping the mixture that has passed through the hole of the rotary sieve and generating an airflow that is substantially perpendicular to the dropping direction with respect to the mixture without providing the wind sorting mechanism 100. And a mechanism for sorting into falling heavy objects.

In the above embodiment, the restricting member 72 is disposed opposite to the outer peripheral side of the first rotating drum 68 in the first magnetic separator 66, but a structure in which the restricting member is not disposed may be employed.

In the above-described embodiment, the regulating member 88 is disposed opposite to the outer peripheral side of the second rotating drum 84 in the second magnetic separator 82. However, a configuration in which the regulating member is not arranged is also possible.

Moreover, in the said embodiment, although the 1st magnet 70 and the 2nd magnet 86 are permanent magnets, it replaces with a permanent magnet and an electromagnet may be applied.

In the above embodiment, the workpiece 12 is an electrode rod, but the workpiece may be another workpiece such as a rod-like member or a plate-like member other than the electrode rod.

Moreover, in the said embodiment, although the blowing device 20 is provided, it is also possible to set it as the structure which does not provide such a blowing device 20. FIG.

In the above embodiment, the shot processing apparatus is the shot blasting apparatus 10, but the shot processing apparatus may be applied to, for example, a shot peening apparatus.

In the above embodiment, the second magnetic separator 82 is provided in addition to the first magnetic separator 66. However, the present invention may have a single magnetic separator.

Claims (12)

1. A projection material separation device for a shot processing device,
   A sieving means disposed in a transport path of a mixture of a magnetic projection material projected onto a workpiece and a product produced by the projection of the projection material, and provided with a hole having a diameter larger than the diameter of the projection material;
   A magnetic separator arranged on the downstream side of the sieving means, a cylindrical shape which is arranged so that its longitudinal axis extends in the horizontal direction and is rotatable in one direction to which the mixture passing through the sieving means is supplied to the outer peripheral surface The rotary drum and a lower position of the rotation center of the rotation drum and a lateral position upstream of the rotation direction extend along the outer peripheral surface of the rotation drum and terminate near the lower position of the rotation center of the rotation drum. A mixture conveyance path provided; and a magnet disposed in the rotary drum so as not to rotate along the inner peripheral surface of the drum, the magnet being upstream in the rotational direction from a position below the rotation center of the rotary drum And a magnetic separator arranged over a second position downstream in the rotational direction from a lower position of the rotation center of the rotating drum,
   The non-magnetic material in the mixture transported through the mixture transport path is dropped downward at the end position of the mixture transport path below the rotation center of the rotating drum, and the magnetic material in the mixture is moved by the magnet to the rotating drum. The magnetic projection material is separated from the product by being attracted to the outer peripheral surface and dropped downward at a position downstream of the rotational center of the rotating drum.
   A projection material sorting device characterized by that.
2. Distributing means disposed below the rotating drum, provided on the downstream side in the rotation direction from a position below the rotation center of the rotating drum so as to receive the magnetic projection material falling from the outer peripheral surface of the rotating drum. Provided with a sorting means,
   The projection material separation apparatus according to claim 1.
3. Distributing means arranged below the rotating drum, comprising a plate-like member arranged so as to extend along the rotation axis of the rotating drum, the plate-like member having one side edge rotated by the rotating drum Receiving a magnetic body disposed between a lower position of the center and a lower position of the second position and inclined downward in a direction away from the rotation center of the rotating drum and dropped downward at the second position;
   The projection material separation apparatus according to claim 1.
4. The distribution means includes a bent plate-like member bent convexly upward and extending along the rotation axis of the rotating drum, and the bent portion is located at a position below the rotation center of the rotating drum and the first member. It is arranged between two positions below,
   The projection material separation apparatus according to claim 1.
5. The first position is set radially inward of the position on the outer peripheral surface of the rotating drum to which the mixture from the sieving means is supplied.
   The projection material separation device according to any one of claims 1 to 4.
6. A wind power sorting mechanism is provided on the downstream side of the sorting means to drop the magnetic projection material separated from the product and apply a gas flow.
   The blast material sorting device according to claim 2.
7. The thickness of the rotary drum radial direction of the mixture conveyance path is adjustable.
   The blast material sorting device according to any one of claims 1 to 6.
8. The magnet is a permanent magnet;
   The blast material sorting device according to any one of claims 1 to 7.
9. A shot processing device for projecting a magnetic projection material onto a workpiece,
   A transfer device for transferring the workpiece;
   A projector that projects a projection material onto the workpiece;
   A sieving means disposed in a transport path of a mixture of a magnetic projection material projected onto a workpiece and a product produced by the projection of the projection material, and provided with a hole having a diameter larger than the diameter of the projection material;
   A magnetic separator arranged on the downstream side of the sieving means, a cylindrical shape which is arranged so that its longitudinal axis extends in the horizontal direction and is rotatable in one direction to which the mixture passing through the sieving means is supplied to the outer peripheral surface The rotary drum and a lower position of the rotation center of the rotation drum and a lateral position upstream of the rotation direction extend along the outer peripheral surface of the rotation drum and terminate near the lower position of the rotation center of the rotation drum. A mixture conveyance path provided; and a magnet disposed in the rotary drum so as not to rotate along the inner peripheral surface of the drum, the magnet being upstream in the rotational direction from a position below the rotation center of the rotary drum And a magnetic separator arranged over a second position downstream in the rotational direction from a lower position of the rotation center of the rotating drum,
   The non-magnetic material in the mixture transported through the mixture transport path is dropped downward at the end position of the mixture transport path below the rotation center of the rotating drum, and the magnetic material in the mixture is moved by the magnet to the rotating drum. The magnetic projection material is separated from the product by being attracted to the outer peripheral surface and dropped downward at a position downstream of the rotational center of the rotating drum.
   A shot processing apparatus.
10. The workpiece is an electrode bar containing impurities made of a non-magnetic material on the surface side,
    The shot processing apparatus according to claim 9.
11. Provided in a recovery path for recovering the projection material made of a magnetic material that is projected onto the object to be processed, and a plurality of holes having a diameter larger than the diameter of the projection material are formed, and the shaft is formed into a cylindrical shape. A sieve body that is driven to rotate around, and the mixture containing the recovered projection material and powdered foreign matter is flown into the inside of the sieve body, and the sieve body rotates around an axis so that the mixture is rotated. A rotary sieve that removes foreign matters having a diameter larger than that of the hole while rolling
    A first rotary drum that is disposed in a path through which the mixture that has passed through the hole of the rotary sieve is conveyed, has a cylindrical shape, is driven to rotate about its axis, and is supplied to the outer surface side of the mixture; A first magnetic separator that is eccentrically arranged in the first rotating drum and is non-rotatable, and that separates and discharges a part of the mixture by the magnetic force of the first magnet;
    The first magnetic separator is arranged in a path along which the mixture that is not adsorbed by the magnetic force of the first magnet is transported, has a cylindrical shape, is rotated around its axis, and is supplied to the outer surface side. A second rotating drum, and a second magnet that is eccentrically arranged in the second rotating drum so as not to rotate, and a part of the mixture is adsorbed by the magnetic force of the second magnet and separated and discharged. A second magnetic separator,
    A shot processing apparatus.
12. A transfer device for transferring the object to be processed;
    A projector that projects a projection material onto the object to be processed;
    A blowing port is disposed downstream of the projector in the conveyance direction of the object to be processed and above the conveyance path of the object to be processed, and is capable of blowing gas toward the object to be processed. A drop device,
    The shot processing apparatus according to claim 11.

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