JPH11347947A - Device for circularly using blasting abrasive in blasting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for circularly using blasting abrasive in a blasting device, which can eliminate trouble with dullness and can work stably with a blasting process having a large processing area to consume a great quantity of blast material and requiring a high accuracy of processing. SOLUTION: In series to a blasting chamber 1, a plurality of cyclone separators 4, 9, 14 are connected, at least including a cyclone separator 9 which takes up larger particles exhausted from a dropping side exhaust part 12 and transports them to the downstream and a cyclone separator 14 which takes up smaller particles exhausted from the suction side exhaust part 16 and transports them to the downstream, whereby only the particles of sizes within the specified range are selected and recycled to the side with a blasting nozzle 2. The suction side exhaust part of this cyclone separator device has a dual suction pipe structure having different bottom positions, and through the suction pipe on the side with lower bottom, only the particles of sizes within the specified range are selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast processing apparatus for processing a surface by applying a powdery or granular blast material made of alumina or the like to a work by placing it on a high-speed air flow or the like, and more particularly to a used blast material. The present invention relates to an apparatus for circulating and using blast material for recycling and reuse.

[0002]

2. Description of the Related Art In this type of blasting machine, there is a blasting machine in which a used blasting material is subjected to an elaborate sorting operation by a combination of a cyclone separating device and a sieving device connected in series and recycled to a blast nozzle side. It is conventionally known (JP-A-6-246636). According to this conventional technique, the used blast material can be separated into those having a predetermined particle size range, so that a good processing state can be obtained at the time of reuse, and this is extremely effective especially when high processing accuracy is required. is there.

[0003] However, in the prior art,
Since a sieve device is used in combination as a means for selecting the particle size, the problem of clogging related to the sieve remains, and a complicated mechanism is required to prevent the clogging or clogging has occurred. In this case, there was a great problem in the injection of the blast material from the blast nozzle on the downstream side. In particular, when a blasting method is applied to a PDP, which tends to be large-sized, that is, a rib forming process of a plasma display panel, a high level of processing accuracy is required, and the blasting method is used as the processing area increases. Since the amount of blast material used increases, fluctuations in the supply state of the blast material due to clogging greatly reduce the processing accuracy, which has been a great obstacle to the reuse of used blast material.

[0004]

SUMMARY OF THE INVENTION The present invention has been developed in view of such a conventional situation. The present invention eliminates problems caused by clogging, has a large processing surface using a large amount of blasting material, and has a high processing accuracy. It is an object of the present invention to provide a blast material circulating and using apparatus of a blast processing apparatus which can stably cope with required blast processing.

[0005]

According to the first aspect of the present invention, a plurality of cyclone separators are connected in series on a discharge side of a used blast material in a blast processing chamber, and the cyclone separators are connected to each other. Among the separation devices, a cyclone separation device that adopts at least the large particles discharged from the drop-side discharge section and transfers it to the downstream side, and a small particle that is discharged from the suction-side discharge section adopts the transfer to the downstream side And a cyclone separation device, and only a particle having a size within a predetermined range is selected and recycled to the blast nozzle side.
According to the second aspect of the present invention, a cyclone separating device having at least a suction side discharge unit configured as a double suction pipe structure having different lower end portions is connected to the used blast material discharge side of the blast processing chamber. By connecting the downstream side of the lower suction pipe at the lower end to the blast nozzle, only the particles having a size within a predetermined range are selected and recycled to the blast nozzle.

[0006] The present invention, by employing the above technical means,
Particles outside the specified range are eliminated only by the cyclone separator, and blast material with a uniform particle size within the specified range can be selected and recycled to the blast nozzle side, so that the conventional problem of clogging can be solved. In addition, it can easily cope with a process of sorting a large amount of blast material. Therefore, even in the blasting of a large PDP or the like, it is possible to easily cope with the use of a large amount of blasting material, and it is possible to reuse the used blasting material without impairing the processing accuracy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is very suitable for blasting large PDPs and the like which require a high processing accuracy and has a large processing area as described above, but is widely applicable to other blasting. It is possible. Further, it is suitable when low-pressure blast air is used, but can be applied to other forms. Various blasting materials such as alumina can be used as the blasting material. The arrangement of each cyclone separation device is not particularly limited. That is, among the cyclone separation devices connected to the blast processing chamber, the cyclone separation device that adopts at least the large particles discharged from the drop-side discharge portion and transfers the particles to the downstream side and the cyclone separation device that is discharged from the suction-side discharge portion is used. A cyclone separation device that adopts a small particle content and transfers it to the downstream side, wherein a particle size smaller than a predetermined particle size is eliminated by the former cyclone separation device, and a particle size larger than the predetermined particle size by the latter cyclone separation device. Is limited to the number of cyclone separators to be installed and the order of arrangement as long as particles having a size outside the predetermined range can be sorted out by eliminating particles having a size outside the predetermined range. is not.

Further, a cyclone separating device in which the suction side discharge portion of the cyclone is constructed in a double suction tube structure having different lower end portions is connected to the blasting chamber, and a lower suction tube at the lower end portion is connected. By connecting the downstream side of the blast nozzle to the blast nozzle side, particles larger than a predetermined particle size are excluded from the drop side discharge section, and particles smaller than the predetermined particle size are discharged from the suction pipe at the lower end position higher. As long as particles having a size outside the predetermined range can be excluded and particles having a size within the predetermined range can be selected, one apparatus may be used, and the number of cyclone separation apparatuses is not limited. Further, by configuring the height of the lower end of the suction side discharge unit of each cyclone separation device to be adjustable, the selection range of the particle diameter can be adjusted according to the change of the processing conditions.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating the arrangement of the cyclone separation device according to the first embodiment of the present invention. In the figure,
Reference numeral 1 denotes a blast processing chamber, in which a blast nozzle 2 is installed. The blast material supplied to the blast nozzle 2 is put on a jet of compressed air or the like supplied through a supply pipe (not shown). The blast processing is performed by spraying a blast material onto the workpiece. A first cyclone separation device 4 is connected via a recovery pipe 3 to a discharge side at the bottom of the blast processing chamber 1. The first cyclone separation device 4 functions as a means for sucking and discharging the discharged particles mainly composed of used blast material and processing waste from the blast processing chamber 1 to roughly sort them, and has a large capacity. . In the first cyclone separation device 4, of the discharged particles flowing from the inflow port 5 through the recovery pipe 3, the particles smaller than a predetermined particle size pass through the suction side discharge unit 6 connected to a suction fan (not shown). Be eliminated. For example, when alumina particles having an average particle size of about 15 to 25 μm are used as the blast material, the first cyclone separation device 4 first uses the particles having an average particle size of about 5 μm or less (equivalent mass). Is set to be excluded from the suction-side discharge portion 6, and the remaining particles having a larger particle size are adopted, and the lower portion where these particles collect due to gravity is used. Is transported from the falling-side discharge section 7 to the second cyclone separation device 9 via the connection pipe 8.

In the second cyclone separator 9, of the particles transferred to the inlet 10 through the connection pipe 8, particles having an average particle size of about 15 μm or less are removed from the suction side discharge unit 11. It is configured such that the remaining particles having the larger particle size are adopted and transferred from the lower drop-side discharge unit 12 to the third cyclone separator 14 via the connection pipe 13.

In the third cyclone separator 14, the particles having an average particle diameter of about 25 μm or less among the particles transferred to the inflow port 15 through the connection pipe 13 are passed through the suction-side discharge unit 16. So that the remaining particles having a large particle diameter are removed from the lower drop-side discharge section 17. The third cyclone separation device 14 is configured to employ the particles discharged through the suction side discharge portion 16 and to be suction-transferred to the suction separation device 19 through the connection pipe 18. I have. In the suction / separation device 19, the fine particles and the gas remaining in the sucked particles are discharged through the filter 20 and a discharge pipe 21 connected to a suction fan (not shown),
The remaining particles are recycled to the blast nozzle 2 through a supply pipe 22. In this case, the fine particles and the gas remaining in the particles pass through the filter 20, so that clogging hardly causes a problem, and the blast material is recycled to the blast nozzle 2 through the filter 20. Therefore, the clogging of the filter 20 does not become a problem as in the related art. The supply pipe 22 is appropriately refilled with a new blast material.

However, as described above, the average particle size of about 15 μm is discharged from the suction side discharge portion 11 of the second cyclone separation device 2.
The following particles are eliminated, and the particles having an average particle diameter of about 25 μm or more are eliminated from the drop-side discharge unit 17 of the third cyclone separator 14. Most of the recycled particles are particles having an average particle size of about 15 to 25 μm. That is,
Using only the cyclone separator, the particles having a target average particle diameter of about 15 to 25 μm can be selected and recycled to the blast nozzle 2 side. In addition, since most of the processing waste mixed in the used blast material is eliminated in the above separation process, only the blast material can be recycled.

FIG. 2 is a schematic structural view illustrating an arrangement of a cyclone separating apparatus according to a second embodiment of the present invention. This embodiment corresponds to a modification of the first embodiment, in which the order of the second cyclone separator 9 and the third cyclone separator 14 is changed. The configuration and function up to the first cyclone separation device 23 in this embodiment are the same as the configuration and function up to the first cyclone separation device 4 in the first embodiment, and the first cyclone separation device 23 is mainly used blast material. It functions as a means for sucking and roughly sorting the discharged particles composed of the processing waste and the like from the blast processing chamber 1, and the discharged particles collected through the recovery pipe 24 connected to the discharge side of the blast processing chamber 1. Among them, for example, the average particle size is about 5
It is configured such that particles having a particle diameter of μm or less are removed from the suction side discharge unit 25, and the remaining particles having a large average particle diameter are transferred from the drop side discharge unit 26 to the second cyclone separation device 28 via the connection pipe 27. ing.

In the second cyclone separator 28, the average particle diameter of the particles transferred through the connection pipe 27 is about 2 μm.
The particles having a particle diameter of 5 μm or less are separated and transferred from the suction side discharge unit 29 to the suction separation device 31 via the connection pipe 30 so that the remaining particles having a large particle diameter are removed from the lower drop side discharge unit 32. It is configured. Then, the suction separation device 31
In the above, the fine particles and gas remaining through the filter 33 are discharged through a discharge pipe 34 connected to a suction fan (not shown), and the remaining particles are discharged through a connection pipe 35 to a third part.
It is transferred to the cyclone separation device 36. In the third cyclone separation device 36, about 1
The particles having a particle size of 5 μm or less are eliminated through the suction side discharge part 37, and the remaining particles having an average particle diameter of about 15 to 25 μm are discharged from the drop side discharge part 38 through the supply pipe 39 through the blast nozzle 2.
Will be recycled.

FIG. 3 is a schematic structural view illustrating an arrangement of a cyclone separating apparatus according to a third embodiment of the present invention. In the present embodiment, a first cyclone separator 40 and a second cyclone separator 41 are connected to the used blast material discharge side of the blast processing chamber 1. The configuration and functions up to the first cyclone separator 40 in the present embodiment are the same as the configurations and functions up to the first cyclone separators 4 and 23 in the above embodiment.
It functions as a means for sucking and roughly separating discharged particles mainly composed of used blast material and processing waste from the blast processing chamber 1 and recovering them through a recovery pipe 42 connected to the discharge side of the blast processing chamber 1. Of the discharged particles, for example, particles having an average particle size of about 5 μm or less are discharged to the suction side discharge section 43.
, And the remaining particles having a large average particle diameter are transported from the falling-side discharge section 44 to the second cyclone separator 41 via the connection pipe 45.

The second cyclone separation device 41 is characterized in that the suction side discharge portion is configured in a double suction pipe structure having a lower end portion, that is, a different opening position. That is, a first suction pipe 46 having a lower lower end portion and a second suction pipe 47 having a lower end portion set at a higher position than the first suction pipe 46 are provided on the outer peripheral portion of the suction side discharge section. Have been. The particles having an average particle diameter of about 15 μm or less, for example, are first removed from the second suction pipe 47 that opens upward, and are discharged from the second suction pipe 47. Of the particles having an average particle size of about 15 or more, the particles having a size of about 25 μm or less
Is configured to be transferred to the suction / separation device 50 via the connection pipe 49, and the remaining large particles having an average particle size of about 25 μm or more are removed from the lower drop-side discharge unit 51 below. ing. As a result, the suction separation device 5
At 0, only particles having an average particle size of about 15 to 25 μm are transferred. In the suction / separation device 50, the fine particles and the gas remaining in the sucked particles are discharged through a filter 52 and a discharge pipe 53 connected to a suction fan (not shown), and the remaining particles are supplied. Tube 54
Through the blast nozzle 2.

Thus, as described above, in this embodiment,
In the second cyclone separator 41, the average particle size is about 15
２５25 μm particles can be sorted at once. In other words, it is possible to select particles having a target average particle size of about 15 to 25 μm using only the cyclone separation device and to recycle them to the blast nozzle 2 side. It is to be noted that, as in the case of the above embodiment, it is possible to recycle only the blast material by removing most of the processing waste mixed in the used blast material in the above separation process.

[0018]

According to the present invention, as described above, particles having a size outside the predetermined range can be eliminated by only the cyclone separator, and the blast material having a particle size uniform within the predetermined range can be recycled to the blast nozzle side. Therefore, the conventional problem of clogging can be solved and a large amount of blasting material can be easily and stably handled. Therefore, large P
Blast processing such as DP can be easily performed, and the used blast material can be reused without impairing the processing accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an arrangement of a cyclone separation device according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram illustrating an arrangement of a cyclone separation device according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram illustrating an arrangement of a cyclone separation device according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blast processing chamber, 2 ... Blast nozzle, 3 ... Recovery pipe, 4 ... 1st cyclone separation apparatus, 5 ... Inlet, 6 ... Suction side discharge part, 7 ... Drop side discharge part, 8 ... Connection pipe, 9 ... Second
Cyclone separator, 10 inlet, 11 suction side outlet, 12 drop side outlet, 13 connection pipe, 14 third cyclone separator, 15 inlet, 16 suction side outlet, 17 Drop-side discharge unit, 18 connection pipe, 19 suction suction device, 20 filter, 21 discharge pipe, 22 supply pipe, 23 first cyclone separation device, 24 recovery pipe, 2
5 suction side discharge section, 26 drop side discharge section, 27 connection pipe, 28 second cyclone separator, 29 suction side discharge section, 30 connection pipe, 31 suction separation apparatus, 32 drop side discharge Reference numeral 33, filter, 34, discharge pipe, 35, connection pipe, 36, third cyclone separator, 37, suction-side discharge part, 38, drop-side discharge part, 39, supply pipe, 40, first cyclone separator , 41 ... second cyclone separation device, 4
2 ... collection pipe, 43 ... suction side discharge part, 44 ... drop side discharge part, 45 ... connection pipe, 46 ... first suction pipe, 47 ... second suction pipe, 48 ... inflow port, 49 ... connection pipe, 50 ... Suction / separation device, 51: falling-side discharge section, 52: filter, 53: discharge pipe, 54: supply pipe

Claims (2)

[Claims] 1. A plurality of cyclone separators are connected in series on a discharge side of a used blast material in a blast processing chamber, and at least a large particle fraction discharged from a drop side discharge part is provided in the cyclone separators. By adopting a cyclone separator that transfers to the downstream side and a cyclone separator that adopts small particles discharged from the suction side discharge section and transfers to the downstream side, particles having a size within a predetermined range are included. A blast material circulating and using apparatus for a blast processing apparatus, wherein only the blast material is sorted and recycled to the blast nozzle side. 2. A cyclone separating device having at least a suction-side discharge portion configured as a double suction pipe structure having a different lower end portion is connected to the used blast material discharge side of the blast processing chamber. A blast processing apparatus characterized in that by connecting the downstream side of the lower suction pipe to the blast nozzle side, only particles having a size within a predetermined range are selected and recycled to the blast nozzle side. Blast material recycling equipment.