JP2014108494A - Shot blasting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shot blasting device that can be installed in any production line, and can perform blast treatment efficiently in a short time, while being miniaturized so as to be compatible with even the modification of the production line.SOLUTION: A shot blasting device 10 performs blast treatment of a work-piece by hanging the work-piece in a cabinet 20 and projecting shot materials while bringing the work-piece into autorotation. In the shot blasting device 10, an internal space S of the cabinet 20 has a horizontal section shape formed in the 2n+2 square shape (n is an integer of 1 or more), and a projection port 22 for projecting shot materials into the cabinet 20 is formed in any one or more side surfaces among a plurality of side surfaces constituting the cabinet 20.

Description

The present invention relates to a shot blasting apparatus for removing burrs by projecting a granular shot material, also called a shot, onto a workpiece (processed product) such as a die-cast product, and in particular, while making the entire apparatus compact, there is no spots. The present invention relates to a shot blasting apparatus capable of performing a polishing process in a short time.

  2. Description of the Related Art Conventionally, as a shot blasting apparatus, a hanger type shot blasting apparatus is known in which a workpiece (product to be processed) is suspended in a cabinet (projection chamber) and rotated at a polishing position to perform blasting.

  As such a hanger-type shot blasting apparatus, for example, Japanese Patent Application Laid-Open No. 2010-082727 has been proposed. This Patent Document 1 proposes a shot processing apparatus that is a hanger-type shot blasting apparatus and can accommodate and process a plurality of workpieces (products to be processed) in a cabinet (projection chamber).

  That is, the shot processing apparatus according to Patent Document 2 includes a shot processing jig provided with a shaft capable of holding a cylindrical portion of one or a plurality of products to be processed, and the shot processing jig is rotated and held. Jig rotation holding means, a projection chamber main body having a structure in which the shot processing jig and jig rotation holding means are sealed, and a shot material is projected in the direction of the product to be processed installed in the projection chamber main body. The projection apparatus and the shot material circulating means for collecting and repeatedly supplying the shot material projected by the projection apparatus to the projection apparatus are provided.

  In the past, there has also been proposed a facility for continuously polishing a work on a hanger of a hanger conveyor. For example, in Patent Document 2 (Japanese Utility Model Laid-Open No. 6-9864), devices are respectively disposed at the product inlet and outlet of a cleaning chamber in a facility for continuously polishing products on a hanger of a hanger conveyor. An inlet body or an outlet body that forms a box and has a product inlet and a product outlet, and one of these product inlets / outlets communicates with a cabinet constituting the polishing chamber, and the inlet body 7 or the outlet body A rotating body arranged rotatably in a horizontal plane via a support shaft and oriented in the vertical direction, a plurality of vertically oriented partition plates mounted radially on the rotary body, and the support shaft A chain wheel fitted and engaged with the transfer chain of the hanger conveyor, and attached to the inner surface of the entrance body or the exit body and engageable with the outer end of the partition plate. Product inlet and outlet devices have been proposed in the hanger type shot-blasting equipment equipped with the number of the rubber plate.

  Further, Patent Document 3 (Japanese Patent Application Laid-Open No. 2011-83889) discloses a so-called monorail that includes a product conveying device for suspending a product to be processed by a hanging bracket and carrying the product in and out of the opening from the opening. A type shot blasting apparatus has been proposed. In this document, the surface of a cast product to which sand adheres in the casting process or a metal product to which oxide scale adheres is uniformly treated, the work process is reduced, and the shot material is scattered outside the cabinet after the treatment. The present invention provides a shot blasting apparatus capable of carrying out a product to be processed and a processing method thereof.

Japanese Utility Model Publication No. 05-016135 JP 2010-082727 A JP 2011-83889 A

  With respect to the hanger type shot blasting apparatus, in recent years, for the purpose of improving the processing capacity, as disclosed in Patent Document 2, there is an equipment for continuously polishing a work hung on a hanger using a hanger conveyor. It has become mainstream. In addition, as disclosed in Patent Document 3, it is also proposed to incorporate a monorail shot blasting apparatus into a production line.

  However, in such a shot blasting apparatus as proposed in Patent Documents 2 and 3, the equipment itself increases in size due to the combination with the peripheral equipment, and once installed, the location can be changed. It becomes difficult. For this reason, it is difficult to cope with a change in the production line.

  Therefore, in the present invention, the shot blasting apparatus can be downsized, installed on an arbitrary production line, easily moved, sufficiently adapted to changes in the production line, and further installed in-line on the production line. The first challenge is to provide

  In addition, it is conceivable to reduce the size of the cabinet when reducing the size of the shot blasting device. However, even in this case, the capability of shot blasting (hereinafter also referred to as “abrasion processing”) for the workpiece is not reduced. You must be careful.

  That is, when the cabinet is downsized, the movement of the shot material (projected) in the cabinet must be fully taken into account, especially in order to evenly perform the polishing process on the workpiece. Even within the cabinet, the shot material must be devised so that it hits the entire workpiece evenly. Furthermore, considering the processing capability of the shot blasting apparatus, it is desirable to shorten the processing time required for one casting cycle.

  Therefore, the present invention provides a shot blasting apparatus that can evenly perform the blasting process on the entire workpiece even in a miniaturized cabinet and further shorten the blasting process time per time. This is the second task.

  Furthermore, when manufacturing a die-cast product such as aluminum, steps of melting an ingot, distributing hot water to a mold, casting, finishing, and shot blasting are performed. In this process, in the finishing process of removing portions such as runners and overflows, products to be processed (hereinafter also referred to as “workpieces”) are supplied to the production line one by one. Therefore, even in the shot blasting process, if the products to be processed can be polished one by one, the waiting time in the production line can be reduced, and production management can be easily performed.

  Accordingly, a third object of the present invention is to provide a production line for die-cast products that can convey and process workpieces one by one when producing die-cast products.

  In the present invention, in order to solve at least one of the above-described problems, in a shot blasting apparatus configured to downsize a cabinet and lock a hanger that rotates in the cabinet, the installation of the shot projector and the shape of the cabinet The present invention provides a shot blasting device with a novel device.

  That is, in the present invention, in order to solve at least one of the above-described problems, the product to be processed is polished by projecting a shot material while suspending the product to be processed in a cabinet and rotating the product to be processed. In the shot blasting apparatus to be processed, the internal space of the cabinet has a horizontal cross-sectional shape of 2n + square (n is an integer of 1 or more), and any one or more of a plurality of side surfaces constituting the cabinet. A shot blasting device is provided in which a projection port for projecting the shot material into a cabinet is formed on the side surface.

  The internal space of the cabinet is a space in which a product to be processed is accommodated and a polishing process is performed, that is, a space where shot material is ejected. In the shot blasting apparatus according to the present invention, the space is formed so that the horizontal cross-sectional shape (that is, the cross-sectional shape) of the space is a 2n + 2 square (n is an integer equal to or greater than 1) such as a quadrangle, a hexagon, and an octagon.

  Since the internal space of the cabinet that performs the blasting process is formed so that the horizontal cross-sectional shape is 2n + square (n is an integer of 1 or more), shot material (hereinafter referred to as “projection material”) from either side Even when the shot material is projected, the shot material hits the opposite inner wall surface, and the shot material can be applied to the opposite side of the product to be processed by rebounding. Therefore, even when the cabinet has a small volume, the product to be processed installed in the cabinet can be effectively polished using the small space as much as possible.

  In addition, in this invention, the shape of the internal space of the said cabinet, especially a horizontal cross-sectional shape are prescribed | regulated, About the external shape and a longitudinal cross-sectional shape, it does not restrict | limit in particular. Therefore, the outer shape and vertical cross-sectional shape of the cabinet can be arbitrarily formed.

  In the shot blasting apparatus according to the present invention, in order to effectively and reliably use the rebound of the projected shot material, the horizontal sectional shape of the internal space of the cabinet is formed in a hexagon (that is, n = 2). Desirably, the projection port is provided on two side surfaces, and the side surface on which the projection port is provided is between the surfaces where the perpendicular angle to each surface is 120 °, that is, the surfaces existing on both sides of either surface. Something is desirable.

  In this way, when the horizontal cross-sectional shape is formed in a hexagonal shape, the surface facing the surface on which the projection opening is formed can be widened. The polishing process can be carried out with the selected quality. Furthermore, by forming the horizontal cross-sectional shape into a hexagon and projecting the shot material in a direction where the crossing angle is 120 °, the surface on the side on which the shot material is projected and the surface facing this (surface on which the shot material hits) In addition to the combination, at least two surfaces can be secured. And, by setting at least one of these two surfaces as a loading / unloading port for loading / unloading the processed product into / from the cabinet, it is possible to eliminate the situation where the shot material is projected directly toward the loading / unloading port, The problem that the shot material accumulates in the vicinity of the carry-in / out port can be avoided.

  The projection port is provided with a projector for projecting the shot material with a rotary blade in order to project the shot material. And when two said projection openings are provided in a cabinet, it is desirable for the projectors provided in each projection opening to respectively differ in the direction of rotation of a rotary blade. For example, when the rotor blades of any of the projectors rotate upward, the rotor blades of the other projectors can be formed to rotate downward. Further, when the rotor blades of any of the projectors rotate in the vertical direction, the rotor blades of other projectors can be formed to rotate in the lateral direction. By forming in this way, the shot material can be projected in various directions, and therefore the shot material can be applied to the product to be processed from various directions. Further, by rotating the product to be processed in the cabinet, the polishing process can be carried out more evenly.

  In other words, the shot blasting apparatus according to the present invention is a miniaturized cabinet that can process and process workpieces that are conveyed one by one so that it can be incorporated into a production line for die-cast products. And in order to be able to sharpen the workpiece evenly and in a short time even in such a miniaturized cabinet, the shape of the cabinet and the projection direction of the shot material projected from the projector are devised as described above. Is. In addition, by reducing the size of the cabinet, the amount of shot material used for the blasting process can be reduced, and the motor installed in the projector can be reduced in size to reduce power consumption, thus reducing shot costs. It is a device.

  Further, in the shot blasting apparatus according to the present invention, a loading / unloading port for loading / unloading a product to / from the cabinet is provided on any side surface constituting the cabinet, and the loading / unloading port is provided by a shutter that slides in the vertical direction. It is desirable to be able to open and close.

  The work loading / unloading port for the inside of the cabinet needs to be closed so that the projected shot material is not discharged outside the cabinet during the polishing process. And as what closes this entrance / exit, it is also conceivable to install a door that opens and closes by drawing an arc around any one side stopped by a hinge or the like. However, when the door is opened and closed, the door moves while drawing an arc. Therefore, the shot material adhering to the inside of the door may be scattered widely in the movement range of the door. Therefore, in order to prevent such scattering of the shot material accompanying opening / closing of the loading / unloading port, it is desirable to open / close the loading / unloading port with a shutter that slides in the vertical direction.

  According to the present invention, in order to solve at least one of the above-described problems, a hanger for a product to be processed that can be preferably used in a shot blasting apparatus, wherein the product to be processed is locked in a cabinet. A hanger for a product to be rotated is provided. That is, a hanger for suspending a product to be processed, which is detachably locked in a cabinet in a shot blasting apparatus, and the hanger has a main shaft formed at the end with a holding portion held in the cabinet. And a hook portion that suspends the product to be processed extending from the main shaft as a base end, the holding portion is rotatably installed around the shaft in the cabinet, and the base end of the hook portion is a hanger And the hook portion provides a hanger for use in a hanger-type shot blasting apparatus that extends toward the center of rotation of the hanger.

  Such a hanger is formed, for example, by bending the main shaft on which the holding portion is formed into a convex shape like a crankshaft, and providing a hook portion on the protruding portion by bending the main shaft into a convex shape. Can do. In the hanger formed in this way, when the product to be processed is suspended from the hook part, the product to be processed is suspended so that the product to be processed exists between the holding parts of the main shaft (that is, the rotation center). Can rotate at the holding part of the main shaft. Therefore, the product to be processed can be rotated at the center in the cabinet by providing the holding portion of the main shaft at the center of the cross section of the cabinet.

  And, for example, when the horizontal sectional shape of the internal space of the cabinet is formed in a hexagonal shape and the projection ports are formed on the surfaces existing on both sides of either surface, the shot material projected from the projection port is the cabinet It is projected toward the product to be processed rotating around the center, and the shot material can be applied almost evenly to the entire surface of the product to be processed. Therefore, by performing the blasting process with a shot blasting device using this hanger, the product to be processed can be scoured evenly while the entire apparatus is downsized, and the blasting process can be performed in a short time. Is possible.

  Moreover, in order to solve at least any one of the said problems, this invention provides the manufacturing system of the die-cast product formed using the said shot blasting apparatus.

  That is, it is a die cast product manufacturing system configured to include a transport path for transporting a product to be processed manufactured by die casting and a shot blasting apparatus for performing a polishing process on the product to be processed transported in the transport path. As the shot blasting apparatus, the shot blasting apparatus according to the present invention is used, and the shot blasting apparatus has one or two products to be processed suspended in a cabinet. It is a manufacturing system.

  In such a die-cast product manufacturing system, the processed product supplied to the conveyance path constituted by a belt conveyor or the like was cast even if the finished product for which the finishing process for removing portions such as the runner and the overflow was completed. Although it may be a product to be processed, it is at least a product to be processed to be subjected to a blast treatment.

  In addition, the products to be processed transported by this transport path are arranged one by one, so that the products to be processed can be transported continuously. The situation of staying can be avoided.

  The shot blasting apparatus according to the present invention can sharpen the products to be processed one or two at a time, so that the work remains at any work station in the entire production line of die-cast products. Will not be lost. Therefore, the idle time (waiting time) in the manufacturing process can be significantly reduced, and the lead time in the process (= waiting time + working time + moving time) can be shortened. For this reason, the shot blasting apparatus installed in the production line of the die-cast product has one or two products to be suspended in the cabinet, and a small amount of the products to be treated is quickly cleaned. It is necessary to implement.

  According to the shot blasting apparatus according to the present invention, since the shot blasting apparatus is downsized, it can be installed on a production line for die-cast products, and in particular, can be installed in-line on the production line. become. Therefore, it is possible to simplify the production management / process management of the product to be processed. In addition, since the polishing process can be performed for each product to be processed (one piece) conveyed through the production line, the in-process lead time can be greatly shortened.

  In particular, in the shot blasting apparatus according to the present invention, as a result of considering the trend of the shot material in the cabinet while reducing the size of the cabinet so that the polishing process can be realized even for such a small amount of the processed product, the processed product This eliminates problems such as over-polishing any part of the above, or insufficient polishing of any part, so that the entire treated product can be evenly ground. The running time can be reduced by greatly shortening the polishing time and also greatly reducing the amount of shot material used in one polishing process. By reducing the amount of shot material to be used, the motor can be reduced in size, and its running power can be further reduced by suppressing its power consumption.

  Since the shot blasting apparatus is downsized, even if the production line is changed or moved, it is possible to respond quickly.

  Furthermore, in shot blasting equipment, it is possible to reduce the size of the cabinet, and shot blast processing (hereinafter referred to as “polishing process”) for the product to be processed by utilizing the rebound of the shot material that has been projected. The shot blasting apparatus can perform the blasting process on the product to be processed evenly and quickly without degrading the capability.

  Furthermore, in the production of die-cast products, ingot melting, hot water supply to the mold, casting, finishing, shot blasting are performed, and even in the case of supplying the products to be processed one by one in the finishing process, By performing the polishing process one by one, the waiting time in the production line can be reduced, and the production management can be easily performed.

Side perspective view showing a shot blasting apparatus according to the present embodiment Cross-sectional view of the cabinet of the shot blasting apparatus according to the present embodiment Vertical sectional view of the cabinet of the shot blasting apparatus according to the present embodiment Cross-sectional view of a cabinet of a shot blasting apparatus according to another embodiment Front perspective view of the cabinet of the shot blasting apparatus according to the present embodiment Vertical sectional view of a cabinet of a shot blasting apparatus according to another embodiment

Hereinafter, the shot blasting apparatus 10 according to the present embodiment will be specifically described with reference to the drawings.
As shown in FIG. 1, a shot blasting apparatus 10 according to this embodiment includes a cabinet 20 that accommodates a workpiece W that is a product to be processed, and a shot projection apparatus 30 provided at a projection port 22 in the cabinet 20. The shot conveying device 42 that transfers the shot material that has come out from the shot material recovery port 24 that collects the shot material projected into the cabinet 20 to the hopper 40 and the dust collector (or “dust collector” that sucks up dust generated in the cabinet 20. Machine ". The same shall apply hereinafter.)

  In the shot blasting device 10 formed in this way, the shot material supplied from the hopper 40 is projected from the projection port 22 onto the internal space S of the cabinet 20 by the projection device 30. In particular, as a shot material used in the present embodiment, for example, a stainless sphere having a sphere diameter of 0.3 mm to 1.0 mm can be used. And since the size of the cabinet 20 is made small, the quantity of the shot material to be used can be reduced significantly.

  The shot material projected from the projection port 22 hits the workpiece W suspended in the cabinet, and removes burrs and the like adhering to the workpiece W to sharpen the workpiece W. In particular, in the present embodiment, a cast product formed by aluminum die casting or the like can be used, and the cast product is set in the cabinet 20 while being hung on a hanger 50 described later.

  Then, the projected shot material falls into the cabinet 20 after hitting the workpiece W. The dropped shot material moves out of the cabinet 20 from the shot material collection port 24 formed on the bottom surface of the cabinet 20 and is collected again in the hopper 40 by the shot conveying device 42 such as a bucket elevator.

Furthermore, it is desirable to rotate the workpiece W accommodated in the cabinet 20 during the polishing process in order to evenly polish the entire outer surface thereof. Therefore, in the shot blasting apparatus 10 shown in FIG. 1, a rotating means 23 such as a motor for rotating a shaft for suspending the workpiece W around the axis is installed on the upper surface of the cabinet 20. Further, it is desirable that the rotation of the workpiece W in the cabinet 20 is configured so that the rotation speed (rotation speed) and the rotation direction can be arbitrarily changed. In this case, the rotation speed (rotation speed) and rotation direction of the rotation means can be controlled by a transmission or other methods.
Further, in FIG. 1, in order to guide the shot material discharged from the cabinet 20 and the shot material supplied from the hopper 40, transfer means 46 such as piping and tubes are provided.

  When the workpiece W to be processed is, for example, a casting, dust such as burrs removed from the workpiece W is generated during the polishing process. In order to quickly take out such dust from the cabinet 20, an exhaust pipe 48 connected to the dust collector is provided on the upper surface of the cabinet 20. In particular, in the shot blasting apparatus 10 according to this embodiment, since the volume of the cabinet 20 is reduced, the size of the dust collector can also be reduced, thereby facilitating the transfer of the shot blasting apparatus 10 and the like. It can be installed on the production line.

  In particular, in the shot blasting apparatus 10 according to the present embodiment, the cabinet 20 that performs the blasting process has a horizontal cross-sectional shape that is hexagonal. FIG. 2 is a horizontal sectional view of the cabinet 20, and is a view taken in the direction of arrows AA in FIG. As shown in FIG. 2, in the cabinet 20 having a hexagonal horizontal cross-sectional shape, the shot material is placed in the cabinet 20 on each side of the side facing the loading / unloading port 28 of the workpiece W. A projection port 22 for projecting is formed. Each projection port 22 is provided with a projection device 30 that urges and projects a shot material by a rotary blade 32 or the like.

  The shot material urged by the projection device 30 is shot into the cabinet 20 from the projection port 22 and is projected toward the axial direction (center direction) of the cabinet 20 formed in a hexagonal cylindrical shape in the present embodiment. ing. At this time, since the surface on which the projection port 22 is formed is formed on the surface existing on either side of any wall surface in the hexagonal cylinder, the shot material projected from each projection port 22 is the axis of the cabinet 20. It will cross 120 ° at the center position.

  By projecting the shot material by forming the projection port 22 as described above, the shot material is not directly projected toward the loading / unloading port 28 of the workpiece W, and problems such as leakage of the shot material are solved. In addition, damage to the loading / unloading port 28 of the workpiece W can be prevented. Further, since the shot material is projected in the intersecting direction, it is possible to avoid as much as possible the situation where the shot material projected from any one of the projection ports 22 enters the other projection ports 22.

  The shot material projected toward the center from each projection port 22 hits the workpiece W, which is the product to be processed, and reflects in various directions, and the shot material that does not hit the workpiece W reflects against the inner surface facing the workpiece W. The surface on the opposite side of the workpiece W can be polished. Therefore, the shot blasting apparatus 10 according to this embodiment is configured such that the polishing process can be performed in four directions in the workpiece W while the shot material is driven into the cabinet 20 from two directions.

  Moreover, each projection apparatus 30 provided in each projection port 22 is installed so that the rotation directions of the rotary blades 32 are opposite to each other. That is, as shown in FIG. 3, in any one of the projection devices 30 (the left projection device 30L in FIG. 3), the rotating blade 32 rotates so as to project the shot material from the top to the bottom, and the other projection In the device 30 (the right projection device 30R in FIG. 2), the rotary blade 32 rotates so as to project the shot material from the bottom to the top. Such a difference in the rotation direction of the rotary blade 32 can be realized, for example, by installing motors for rotating the rotary blade 32 in opposite directions.

  As a matter of course, depending on the shape of the workpiece W to be cleaned, each projection device 30 can be configured to project the shot material in the same direction. Also, any one of the projection devices 30 can be installed so that the rotation direction of the rotary blade 32 is horizontal, and the other projection device 30 can be installed so that the rotation direction of the rotary blade 32 is vertical. . By adjusting the shot material projection direction in various combinations in this way, for example, when the workpiece W has a hole or an intricate portion, it is not possible to sharpen sufficiently only by projecting the shot material from a single direction. Even for the workpiece W, it is possible to perform the polishing process to every corner.

  Further, when the shot material projected as described above hits the opposite wall surface and the surface opposite to the workpiece W is polished by the reflection, the inner surface of the cabinet 20 is made elastic as shown in FIG. It is also desirable to cover with a material such as an elastic sheet 26 having the same. For example, by covering the inner surface of the cabinet 20 with an elastic sheet 26 made of synthetic rubber or natural rubber, the shot material injected from the projection port 22 is bounced back to the elastic sheet to minimize the attenuation of kinetic energy. Thus, the workpiece W can be sharpened. Further, by covering the inner surface of the cabinet 20 with the elastic sheet 26, it is possible to prevent wear of the inner wall surface of the cabinet 20 due to the shot material, and the shot blasting apparatus 10 having excellent durability can be obtained.

  FIG. 5 is a main part front view showing the loading / unloading port 28 for the workpiece W of the shot blasting apparatus 10 according to the present embodiment. In particular, the shot blasting apparatus 10 according to the present embodiment is arranged to be slidable in the vertical direction so that the shot material in the cabinet 20 is not scattered outside during the opening / closing operation of the loading / unloading port 28 of the workpiece W. The loading / unloading port 28 for the workpiece W is opened and closed by the shutter. Such a shutter may be slidable in the vertical direction by, for example, forming a groove extending in the vertical direction on the opening end face in the left-right direction of the loading / unloading port 28 of the workpiece W and holding a plate-like shutter in the groove. it can.

  It is also conceivable that the shot material is deposited near the loading / unloading port 28 of the workpiece W during the polishing process. Therefore, in such a case, a flange-shaped receiving portion (not shown) extending outward is formed below the loading / unloading port 28 of the workpiece W, and the vertical movement of the shutter is performed at the flange-shaped receiving portion. It is desirable to receive the shot material that spills during the opening and closing of the workpiece W loading / unloading port 28 and return it to the cabinet 20.

  Furthermore, it is desirable to provide a sensor for confirming whether or not the workpiece W is loaded at the loading / unloading port 28. That is, it is desirable to form the workpiece W so that the shot material is not projected unless the work W loading / unloading port 28 is closed by the shutter or the like. This is because the safety during the blasting process in the shot blasting apparatus 10 is enhanced. As such a sensor, for example, a switch or a sensor that is energized when the shutter is down can be used.

  FIG. 6 is a longitudinal sectional view showing an example in which a hanger 50 that can be suitably used in the shot blasting apparatus 10 is used. In the hanger 50 of the workpiece W shown in this figure, the upper and lower ends of the main shaft 52 formed in a crankshaft shape are held in the cabinet 20. More specifically, the upper end of the main shaft 52 is attached to rotating means 23 such as a motor that rotates the main shaft 52 around the axis, and the lower end is accommodated in a hole formed in the bottom surface of the cabinet 20. In this state, when the main shaft 52 rotates around the axis, the portion 54 protruding in the lateral direction on the main shaft 52 rotates around the rotation center of the main shaft 52.

  A hook portion 56 extending toward the center of rotation of the hanger 50 is formed at a convex portion 54 of the main shaft 52. In particular, in the present embodiment, the hook portion 56 is formed at two locations and has a length exceeding the rotation center of the hanger. It should be noted that the tip of the hook portion 56 can be bent upward so that the locked work W does not fall during the polishing process. One hook portion 56 may be formed. Further, it is desirable that the main shaft 52 is detachably provided with respect to a rotating shaft of the motor or a shaft extending from the rotating shaft. For example, the tip extending from the shaft portion of the rotating means 23 such as the motor may be formed in a ring shape, and the upper end of the main shaft 52 may be formed in a hook shape that engages the ring.

  By using the hanger 50 formed in this way, even if the hanger 50 is rotated around the axis during the polishing process, the workpiece W can always exist at the center of rotation. Since the distance can be kept substantially constant, the polishing process can be performed evenly.

  And the shot blasting apparatus 10 which concerns on this Embodiment forms the size of the cabinet 20 in the magnitude | size which can accommodate the 1 or 2 workpiece | work W, as shown in FIG.5 and FIG.6. Even when incorporated in the production line of cast products in-line, it is possible to perform the polishing process for each workpiece W transferred on the conveyance path, thereby greatly reducing the idle time of the workpiece W. it can.

  Further, by reducing the volume of the cabinet 20 in this way, the amount of shot material used in one blasting process can be reduced, and a dust collector for sucking dust generated during the blasting process can be provided. It can be downsized and installed and moved easily.

  Furthermore, by forming as described above, the entire shot blasting apparatus 10 can be reduced in size, so that even when the production line is changed or moved, it is possible to respond flexibly.

10: Shot blasting device, 20: Cabinet, 22: Projection port, 23: Rotating means, 24: Shot material recovery port, 26: Elastic sheet, 28: Loading / unloading port, 30: Projection device, 32: Rotating blade, 40: Hopper, 42: Shot transfer device, 46: Transfer means, 48: Exhaust pipe, 50: Hanger, 52: Main shaft, 56: Hook part, S: Internal space, W: Workpiece

Claims (6)

A shot blasting apparatus 10 that blasts a product to be processed by projecting a shot material while suspending the product to be processed in a cabinet 20 and rotating the product to be processed.
The internal space S of the cabinet 20 is formed in a 2n + 2 square shape (n is an integer of 1 or more), and any one or more of the side surfaces constituting the cabinet 20 has the A shot blasting apparatus, wherein a projection port 22 for projecting a shot material into the cabinet 20 is formed.
The internal space S of the cabinet 20 is formed in a hexagonal shape in horizontal cross section,
The shot blasting device according to claim 1, wherein the projection port 22 is provided on each of two side surfaces, and the side surface on which the projection port 22 is provided is a surface existing on both sides of any one of the side surfaces.
The projection port 22 is provided with a projection device 30 that projects a shot with a rotary blade 32.
The shot blasting device according to claim 2, wherein each of the projection devices 30 has different rotation directions of the rotary blades 32.
A loading / unloading port 28 for taking in and out the product to be processed into and out of the cabinet 20 is provided on any side surface constituting the cabinet 20.
The shot blasting device according to any one of claims 1 to 3, wherein the carry-in / out port 28 is formed to be freely opened and closed by a shutter that slides in a vertical direction.
In the cabinet 20, a hanger 50 for suspending a product to be processed is detachably locked,
The hanger 50 includes a main shaft 52 having a holding portion held in the cabinet 20 formed at an end thereof, and a hook portion 56 that extends from the main shaft 52 as a base end and suspends a product to be processed.
The holding portion is installed in the cabinet 20 so as to be rotatable around an axis,
5. The base end of the hook portion 56 exists outside the rotation center of the hanger 50, and the hook portion 56 extends toward the rotation center of the hanger 50. Shot blasting equipment.
A die-cast product manufacturing system including a transport path for transporting a product to be processed manufactured by die casting and a shot blasting apparatus 10 for performing a polishing process on the product to be processed transported in the transport path. ,
The shot blasting apparatus 10 uses the shot blasting apparatus 10 according to any one of claims 1 to 5, and the shot blasting apparatus 10 includes one or two products to be processed suspended in the cabinet 20. A die-cast product manufacturing system characterized by being.