WO2013172553A1

WO2013172553A1 - Apparatus for removing particulate matter from synthetic resin material

Info

Publication number: WO2013172553A1
Application number: PCT/KR2013/002924
Authority: WO
Inventors: 김중순
Original assignee: Kim Joong Soon
Priority date: 2012-05-16
Filing date: 2013-04-08
Publication date: 2013-11-21
Also published as: KR101170939B1

Abstract

The present invention relates to an apparatus for removing particulate matter from a synthetic resin material to remove particulate such as dust, other foreign materials, and the like adhered to a synthetic resin material. More specifically, the apparatus for removing particulate matter from a synthetic resin material comprises a body of an apparatus for removing particulate, a transfer pipe, and a dust collection portion, wherein the body of an apparatus for removing particulate matter comprises a material supply portion having an input hole, an input amount control means, a static elasticity-removing means, a chamber, and an inclined plate having a discharge hole, one end of the transfer pipe is upwardly spaced from the discharge hole by a predetermined distance, and at least one air amplification portion using compressed air is provided to transfer the separated particulate matter to the dust collection portion through the transfer pipe. In addition, the air amplification portion can comprise a first air amplifier and a second air amplifier, and a compact apparatus for removing particulate matter is provided by integrating the dust collection portion to the body of an apparatus for removing particulate matter.

Description

Dust removal device of synthetic resin raw material

The present invention relates to a dust removing apparatus of a synthetic resin raw material, and more particularly, by separating the dust attached to the synthetic resin raw material step by step during the processing or transfer process, in the prior step of introducing the synthetic resin raw material into the plastic injection molding machine, The present invention relates to a dust removal apparatus for improving purity.

Usually, for injection molding or extrusion molding of plastics, synthetic resin raw materials such as plastics are used. However, the synthetic resin raw material is very difficult to maintain the purity of the synthetic resin raw material because dust is easily attached due to the generation of static electricity during processing or transportation.

These dusts include fine dusts such as external dust, dust of wrapping paper, and silage of packaging bags, as well as fine pieces of resin powder in powder form, broken raw materials in chip form, and the like. When the finished product is manufactured using synthetic resin raw materials including dust as described above, problems such as product defects such as fine cracks of the product are caused.

1 and 2 show a conventional technology, Figure 1 is a schematic diagram showing that the conventional dust removal device body 10 'is disposed on the injection molding machine, Figure 2 is a dust removal device body (shown in Figure 1 ( 10 ') is an enlarged cross-sectional view.

Referring to FIG. 1, a synthetic resin raw material is input from a hopper loader, which is located at an upper portion of a conventional dust removing device body 10 ′, and synthetic resin raw material from which dust is detached is disposed at a lower portion by gravity at a lower end thereof. Transferred to an injection molding machine.

At this time, since the volume of the conventional high pressure blower is relatively larger than the dust removing body 10 ', the high pressure blower and the cyclone dust collector are integrated and connected to the blow-dust unit 70' which is separately mounted to the outside. Take it. The blow-dust collecting part 70 'is connected by the dust removing apparatus body 10', the supply pipe 301 'and the recovery pipe 302'.

Figure 2 is an enlarged cross-sectional view showing the action of the dust removal apparatus body 10 'according to the prior art, the synthetic resin raw material containing dust and the like is drawn out through the inlet 124' of the raw material supply portion 120 '. . In this case, a plurality of perforation holes 112 'are formed in the inclined plate 110', and the air introduced through the supply pipe 301 'and the inflow connection pipe 161' leaks into the perforation holes 112 '. As it comes out, the dust attached to the synthetic resin raw material is forcibly removed.

That is, the dense synthetic resin material is filtered out through the lower outlet 182 ', and the air containing the desorbed dust is discharged into the chamber 160', the outlet connection pipe 162 'and the recovery pipe according to the flow of the high pressure air. It is conveyed to the external blower-dust collector 70 'via 302'.

In the external blower-dust collector 70 ′, dust is filtered by a known cyclone dust collector or the like from air containing dust or the like. Thereafter, the above operation is repeated by recycling only the purified air back to the dust removing apparatus body 10 'through the supply pipe 301'. (See US Patent Application Publication US 2007/072598 for an example similar to the prior art described above.)

Meanwhile, Korean Patent Application Publication No. 10-2005-0112557 discloses a technique for removing dust from synthetic resin raw materials by similarly adopting the above-described conventional technology and further including an electrostatic eliminator and an external suction fan. have.

However, the above-described conventional techniques i) take a forced circulation structure of air, so that a high pressure blower with a very high noise and power consumption should be used, and ii) a separate blower-dust collector is provided by a supply pipe and a recovery pipe. It is connected to the, and the occupied space in the workplace is unnecessarily large, iii) there is a problem in that the configuration of the dust removal device is a complicated cost increase factor.

In order to solve the above problems, an object of the present invention is to provide a dust removal device for synthetic resin raw materials having i) minimizing power consumption and noise generation, and ii) compact construction.

The present invention for solving the above problems, Dust removal device of the synthetic resin raw material comprising a dust removal device body, a dust collector and a transfer pipe, The dust removal device body is a feeder is formed, the raw material supply unit, the input amount of the synthetic resin raw material It includes an adjusting means, a static electricity removing means, a chamber and an inclined plate formed with a discharge port, the transfer pipe is provided with one end spaced apart from the discharge port in a predetermined distance upwards, the desorbed dust is pumped to the dust collector through the transfer pipe It characterized in that it comprises at least one air amplifier using compressed air to.

Preferably, the air amplifier may include a first air amplifier provided at one end of the transfer pipe and a second air amplifier provided below the discharge port.

In addition, the air pressure supplied to the second air amplifier is preferably controlled to be smaller than the air pressure supplied to the first air amplifier.

In addition, the dose adjustment means may be characterized in that the rotary valve rotates at a predetermined speed.

Preferably, the outer side of the dust removal device body is further provided with a control unit, the control unit includes a motor speed regulator for controlling the speed of the rotary valve or an air pressure regulator for controlling the pressure of the compressed air supplied to the air amplifier Good to do.

On the other hand, the inclined plate is preferably provided with a conical slope, or the inlet and the outlet are preferably arranged so as to be eccentric with each other from the vertical center axis of the chamber.

In addition, the dust collector may be in communication with the other end of the transfer pipe, it may include a cyclone dust collector that is integrally coupled with the dust removal device body.

According to the present invention, i) exerts an excellent function in dust removal even using a small amount of compressed air through the air amplification unit can minimize the power consumption and noise generation. ii) Furthermore, since the high-pressure blower is not required, the cyclone dust collector and the dust collector may be integrally provided in the dust removing apparatus, thereby allowing a compact configuration. iii) In addition, there is an effect of reducing the production cost, there is no need for a separate high-pressure blower and dust collector to minimize the footprint of the workplace.

1 is a state diagram used in accordance with the conventional dust removal device.

Figure 2 is an enlarged cross-sectional view of the conventional dust removal apparatus body according to FIG.

3 is a cross-sectional view of the dust removal device of the synthetic resin raw material according to the present invention.

4 is an enlarged cross-sectional view of an air amplifier part constituting the present invention;

5 is a front view of the dust removal apparatus of the synthetic resin raw material according to the present invention.

Figure 6 is a perspective view of the dust removal apparatus of the synthetic resin raw material according to the present invention.

7 is a rear perspective view of the dust removing device of the synthetic resin raw material according to the present invention.

8 is a cross-sectional view showing an embodiment of a dust collecting part that constitutes the present invention.

9 is a cross-sectional view showing another embodiment of a dust collecting part that constitutes the present invention.

1: Dust removal device for synthetic resin

10: dust removal device body

120: raw material supply unit 124: inlet

130: input amount adjusting means 132: rotary valve

140: static electricity removing means 142: ionizer

160: chamber

180: inclined plate 182: outlet

20: control unit

30: transfer pipe

50: air amplifier

520: the first air amplifier, 540: the second air amplifier

560: compressed air supply unit

70: dust collecting part;

Hereinafter, with reference to the accompanying drawings will be described in detail the structure and operation of the present invention. 3 is a cross-sectional view of the dust removal device of the synthetic resin raw material according to the present invention, Figure 4 is an enlarged cross-sectional view of the air amplifier shown in FIG.

Referring to Figure 3, the dust removing device 1 of the synthetic resin raw material according to an embodiment of the present invention is a dust removal device body 10, the dust collecting unit 70 and the transfer pipe connecting the dust removing device body and the dust collecting unit In the dust removal apparatus of the synthetic resin raw material containing 30,

The dust removing apparatus body 10 includes a raw material supply unit 120, an input amount adjusting unit 130, an electrostatic removing unit 140, a chamber 160, and an inclined plate 180; The transfer pipe (30) is provided with one end spaced apart a predetermined distance upward from the discharge port (182); It characterized in that it comprises at least one air amplification unit 50 using compressed air to transport the desorbed dust to the dust collecting unit 70 through the transfer pipe (30). Each part will be described in detail below.

Referring to FIG. 3, the dust removing apparatus body 10 includes a raw material supply unit 120, an input amount adjusting unit 130, an electrostatic removing unit 140, a chamber 160, and an inclined plate 180 from above. The synthetic resin raw material flows from the top to the lower side by gravity to supply a high-purity synthetic resin raw material in which dust and the like are removed to a plastic injection machine (not shown) placed at the bottom of the dust removing apparatus 1.

The raw material supply unit 120 is a site where the synthetic resin raw material attached with foreign substances such as dust is initially supplied, and a known hopper having a funnel shape may be used. An inlet 124 is formed at the lower end of the raw material supplier 120, and a cross section of the raw material supplier 120 or the inlet 124 may be a cone or a pyramid.

In one embodiment of the present invention, the inlet 124 is formed to be eccentric a predetermined distance from the vertical center axis of the raw material supply unit 120 or the chamber 160 to be described later. This will be described later.

When the input amount adjusting means 130 is excessively introduced into the chamber 160, which is the internal space of the dust removal apparatus body 10 through the inlet 124, the synthetic resin raw material is overloaded or air amplifier 50 to be described later It has an action and an effect for preventing deterioration of the air feeding efficiency of

That is, the input amount adjusting means 130 is a configuration for appropriately adjusting the supply of the synthetic resin raw material according to the user's setting. If it has such a function, it is a matter of course that a variety of known raw material supply apparatus can be used integrally coupled to the above-described raw material supply unit 120. In one embodiment of the present invention, the rotary valve 132 was used as the dose adjusting means.

Referring to FIG. 3, the rotary valve 132 is a known configuration in which a plurality of vanes are fixed to a rotating shaft to rotate at a predetermined speed, thereby controlling a supply amount of a synthetic resin raw material. Preferably, the lower side of the inlet 124 may be provided with a side distance 126 of the inlet pipe sidewall 126 for a function with the rotary valve 132.

Referring to FIG. 3, the static electricity removing means 130 is disposed downstream of the dose adjusting means 130 or the rotary valve 132. Synthetic resin raw material is characterized in that the static electricity is generated in the process of processing and transport easily attached dust, etc., a known ionizer 132 for removing the static electricity may be used.

The ionizer 132 used as an example of the dose adjusting means 130 removes static electricity by the air method at a position spaced a predetermined distance from the rotor ratio valve 132. Since the operation and effects of the ionizer are well known, detailed description thereof will be omitted.

Preferably, it is preferable to provide a protective plate 144 to prevent contamination and damage, and more preferably designed to be easily removable from the outside for maintenance and management. In addition, the ionizer 132 may be used in plural to effectively remove static electricity, and of course, an ionizer other than the air type may be used. When using the air method, a separate air supply pipe (not shown) may be provided.

Referring to FIG. 3, the chamber 160, which is the inside of the dust removing apparatus body 10, has dust and synthetic resin raw materials falling through the raw material supply unit 120, the input amount adjusting unit 130, and the static electricity removing unit 140. Space. An inclined plate 180 having an outlet 182 is provided below the chamber 160. The synthetic resin raw materials that fall down and reach the inclined plate 180 are moved toward the outlet 182 by gravity, and light particles are concentrated in the lower part of the air amplifier 50 to be described later while floating.

Preferably, the inlet 124 and the outlet 184 is disposed to be eccentric with each other from the vertical center axis of the chamber 160, respectively. Alternatively, the outlet 182 is eccentric at the center of the inclined plate, it is preferable to be spaced apart from the vertical center axis of the inlet 124 of the raw material supply.

This is to improve the utilization of the space inside the chamber 160 to provide a compact dust removal device, while optimizing the transport path of the synthetic resin raw material to maximize the efficiency of the air blower.

That is, the transfer pipe 30 to be described later is in communication with the dust collecting part 70 is bent in a 'b' shape. In addition, it is because the transfer pipe 30 and the air amplifier 50 is disposed so as to be spaced apart from the space in which the synthetic resin raw material falls from the inlet 124.

In addition, the inclined plate is preferably provided to have a conical slope shape. It was experimentally observed that the efficiency of the air amplifier is reduced when the inclined plate is provided in a pyramidal shape, and when the conical shape is provided, the synthetic resin raw material is effectively transferred to the lower side of the air amplifier 50 due to the turning force. have.

Referring to FIG. 3, the transfer pipe 30 is connected between the dust removing body 10 and the dust collecting part 70, and one end 301 is spaced apart a predetermined distance upward from the outlet 182. As an embodiment of the amplifier 50, the first air amplifier 520 is coupled. In addition, the chamber 160 may be bent in a substantially '-' shape so that the other end 302 may be provided to communicate with the dust collecting part 70.

Next, the air amplifier 50 will be described with reference to FIGS. 3 and 4. Air amplification unit 50 constituting the present invention is at least one or more air amplification using compressed air to press the dust desorbed through the static electricity removing means 140 to the dust collecting unit 70 through the transfer pipe 30 It is characterized in that the portion (50).

As an embodiment of the present invention, the air amplifier 50 may be a first air amplifier 520 coupled to one end 301 of the transfer pipe 30. In addition, the first air amplifier 520 may include a second air amplifier 520 provided below the outlet 182 of the inclined plate. In addition, the number of installation of the first air amplifier 520 or the second air amplifier 520 may be provided in plurality in accordance with the optimum experimental value.

Referring to FIG. 4, the first air amplifier 520 and the second air amplifier 540 are compressed

air branch lines

521 and 541 supplied with compressed air, respectively, and an injection hole connected to one end of the compressed air branch line. 522 and 542,

slits

524 and 544 through which compressed air is discharged, and

nozzle inlets

526 and 546 and

nozzle outlets

528 and 548 for sucking and pumping the ambient air.

In the exemplary embodiment of the present invention, since the dust is sucked into the first air amplifier 520 and the synthetic raw material is dropped by gravity as the second air amplifier 540, the inner diameter of the second air amplifier 540 is designed to be larger. Of course, the first air amplifier 520 and the second air amplifier 540 may be provided with the same structure and size.

4, in the first air amplifier 520, a compressed air branch line 521 through which compressed air supplied from the compressed air supply unit 560 to be described below flows is connected to the injection hole 522. The compressed air introduced into the injection hole 522 is discharged to the annular slit 524 from the annular space. This is a device using a known Coanda Effect, the air under the first air amplifier 520 is pushed through the nozzle inlet 526 toward the nozzle outlet 528.

Therefore, only the synthetic resin raw material having a high density among the dust and synthetic resin raw materials dropped on the inclined plate 180 is dropped to the discharge port 182, and the small dust and the like are transferred by the air flow formed by the first air amplifier 520. It is pumped to the dust collector 70 through the pipe (30).

At this time, since the nozzle inlet 526 of the first air amplifier 520 may not have a uniform suction force with respect to the dust due to the difference in the distance and shape of the nozzle inlet 526 from the outlet 182. Of course, the numerical range of the family register can be applied.

Furthermore, a second air amplifier 540 may be further included below the outlet 182 to reinforce the suction force of the first air amplifier 520. The second air amplifier 540 may also obtain a synergistic effect on the suction force of the first air amplifier 520 by generating the air flow from the bottom to the upper direction in the same principle as the first air amplifier 520. The discharge air pressure of the second air amplifier 540 should of course provide an appropriate air pressure so as not to affect the fall of the synthetic resin raw material.

On the other hand, through the experimental example of the present invention, it was observed that controlling the amount of compressed air supplied to the second air amplifier 540 less than the first air amplifier 520 is effective in dust removal. More specifically, it was confirmed that it is effective to adjust the ratio of air pressure applied to the ionizer, the first air amplifier, and the second air amplifier to a level of approximately 0.3 to 0.4: 1: 0.6 to 0.7. However, it is noted that the numerical range is a variable range according to the size, shape, etc. of the air amplifier as described above, and if one of ordinary skill in the art can easily determine the supply pressure in the range of the family register, It would fall within the scope of rights.

Meanwhile, the dust removing apparatus of the synthetic resin raw material according to the present invention with reference to FIGS. 3 and 4 shows an example of one transfer pipe and an air amplifier coupled thereto. As another embodiment of the present invention, a plurality of transfer pipes and Of course, it is possible to have a method of communicating with the dust collector by providing an air amplifier coupled to each.

Furthermore, although not shown in the drawings, in addition to the method of providing the inclined plate in the shape of a conical slope, it is also found that a plurality of inclined plates are provided in a zigzag form and a plurality of outlets are included in the scope of the present invention.

Next, the dust collecting unit 70 with reference to FIG. 3 is in communication with the other end 302 of the transfer pipe 30, characterized in that the cyclone dust collector 720 is integrally coupled with the dust removal device body 10. You can do

The cyclone dust collecting method is a method of separating foreign substances such as dust from the air by using a centrifugal force generated when the air rotates without a separate filter. Referring to FIG. 3, the dust collecting unit 70 may include a cyclone dust collector 720 and a dust collection container 760 for collecting dust.

In particular, in the dust removal apparatus of the related art, referring to FIGS. 1 and 2, a blower-dust collector 70 ′ mounted on the outside coupled with a high-volume high-pressure blower should be used, and a separate supply pipe 301 ′ because of the circulation structure. ) And the recovery pipe 302 ′, there was a problem of space utilization.

However, the dust removing apparatus 1 according to the present invention with reference to FIG. 3 may provide a compact dust removing apparatus which is provided with a dust removing apparatus body 10 and a dust collecting unit 70 integrally and does not use a circulation structure. .

Figure 5 is a front view of the dust removal apparatus of the synthetic resin raw material according to the present invention, Figure 6 is a perspective view thereof, Figure 7 is a rear perspective view thereof.

5 to 7, in another embodiment of the present invention, the dust removal device body 10 may further include a control unit 20. The control unit includes a motor speed controller 230 for controlling the speed of the rotary valve 132 and / or an air pressure regulator 250 for controlling the pressure of the compressed air supplied to the air amplifier 50. can do.

The motor speed controller 230 may be a manipulation device such as a button, a knob, and a dial, and may be provided with a speed indicator 232 indicating the rotational speed of the rotary valve. In addition, the pressure gauge 252 for displaying the compressed air pressure in accordance with the operation of the air pressure regulator 250 may be provided as shown in FIG. The position of the motor speed controller 230 or the air pressure regulator 250 may be appropriately arranged by design change.

Preferably, as shown in FIG. 5, the air amplifier 50 may be connected to a compressed air supply unit 560 including a compressed air generating unit 562 and a compressed air supply line 564. The compressed air generating means 562 may be a compressor or the like. In FIG. 5, although the compressed air supply unit 560 is spaced apart from the control unit 20, the compressed air supply unit 560 may be provided. However, the compressed air supply unit 560 may be integrated into the control unit 20 or the dust removing body 10 according to the performance of the compressor. to be.

Compressor used in the experimental example of the present invention was used under the conditions of 2 ~ 3bar, 40 ~ 50NL / m, the compressed air consumption of the air amplification unit 50 is about 30 to 50 liters per minute 1 of the general air gun usage It was confirmed that the energy saving effect was very excellent as it was only 1/3 to 1/4. In addition, it is proved that the power saving effect of more than 1.5kW compared to the power consumption of the conventional blower-dust collector mounted on the outside.

On the other hand, one side of the dust removal device body 10 is provided with a transparent window 190, it is preferable to observe the state of the rotary valve 132 and the like while visually confirming the chamber 160. Referring to FIG. 7, a driving motor 134 for rotating the rotary valve may be provided at a rear side thereof, and a power switch, a power connector, and a connector for supplying ionizer air may be arranged for the other control unit 20. Can be.

8 and 9 are cross-sectional views showing the dust collecting part 70 of the present invention. FIG. 8 shows a dust collecting part 70A according to an embodiment of the present invention, and FIG. 9 shows the present invention. A dust collecting part 70B according to another embodiment is shown.

Referring to FIG. 8, the cyclone dust collector 70A has a shape that becomes narrower as the dust collector inner wall 723a faces downward, so that the airflow rotating in the hermetic dust collecting container 760 disposed at the bottom is not introduced. .

However, when the chips as well as the raw material fragments are often thrown into the inclined dust collector inner wall (723a) to flow into the transfer pipe 30, there is a problem that the raw material fragments are discharged out through the air filter tube (722) There is room.

Referring to FIG. 9, in the dust collector 70B according to another embodiment of the present invention, the shape of the dust collector inner wall 723b is not narrowed downward, and may take a straight shape. In addition, to block the flow of air in the dust collection container 760, and to add a conical wind stopper 742 in order to minimize the frequency of the incoming raw material is generated through the air filter tube 722 to the outside It may be characterized by.

The conical wind stopper 742 has a conical portion upward as shown in FIG. 8 (b), and is disposed between the cyclone dust collector 720 and the dust collection container 760. In addition, a plurality of through holes 744 are formed to allow the dust and the introduced raw material pieces to pass through the lower periphery of the conical wind stopper 742, and for this purpose, the support part 746 is the conical wind stopper 742. And the dust collection container 760 may be configured to support the conical wind stopper.

As described above, the operation of the dust removing apparatus 1 according to the present invention will be briefly described with reference to FIGS. 3 to 5 as follows. The compressed air supplied from the compressed air generating means 562 is passed through the compressed air supply line 564 and the compressed

air branch lines

521 and 541 to the first air amplifier 520 and / or the second air amplifier 540. )

Synthetic resin raw material including dust is transferred from the inlet 124 formed in the upper direction toward the outlet 182 below the chamber 160. At this time, among the synthetic resin raw material including the dust passing between the first air amplifier 520 and the second air amplifier 540, the dust of small density is the upper air of the first air amplifier 520 in accordance with the air flow The high density synthetic resin material, which is sucked to the nozzle inlet 526 and removes dust, is supplied to the plastic injection machine disposed below through the outlet 182 and the second air amplifier 540. The second air amplifier 540 has an action and an effect of reinforcing the first air amplifier 520.

When air including dust is introduced into the dust collector 70 through the transfer pipe 30, the rotation force is generated by the cyclone dust collector 720, and the dusts are collected in the dust collection container 760 located below by centrifugal force and gravity. Gathered. The dust-free air is discharged to the outside through the air filter tube 722 opened upward.

The present invention is not limited to the above-described embodiments, and the scope of application is not limited, and various modifications can be made without departing from the gist of the present invention as claimed in the claims.

Claims

In the dust removal device of the synthetic resin raw material comprising a dust removal device body 10, a dust collecting unit 70 and the transfer pipe 30 connecting the dust removing device body and the dust collecting unit,

The dust removing device body 10 has an inlet 124 is formed and the raw material supply unit 120 is a synthetic resin raw material is injected, the input amount adjusting means 130 located downstream of the input hole 124, the downstream of the input amount adjusting means It includes an inclination plate 180 is formed in the static electricity removing means 140, the chamber 160 through which the synthetic resin raw material and the discharge port 182 is located,

The transfer pipe 30 is provided with one end spaced apart from the outlet 182 by a predetermined distance upwards,

Dust removal device of the synthetic resin raw material, characterized in that it comprises at least one air amplification unit (50) using the compressed air for conveying the desorbed dust to the dust collector (70) through the transfer pipe (30).
The method of claim 1,

The air amplifier 50 includes a first air amplifier 520 provided at one end 301 of the transfer pipe 30 and a second air amplifier 540 provided below the outlet 182. Dust removing device of the synthetic resin raw material, characterized in that.
The method of claim 2,

The air pressure supplied to the second air amplifier (540) is controlled to be less than the air pressure supplied to the first air amplifier (520) dust removal device of the synthetic resin raw material.
The method of claim 2,

The first air amplifier 520 and the second air amplifier 540 are compressed air branch lines 521 and 541 supplied with compressed air, respectively, and injection holes 522 and 542 connected to one end of the compressed air branch line. And slit (524, 544) from which the compressed air is discharged, and nozzle inlets (526, 546) and nozzle outlets (528, 548) for sucking and feeding the surrounding air.
The method of claim 1,

The input amount adjusting means 130 is a dust removing device of the synthetic resin raw material, characterized in that the rotary valve 132 is rotated at a predetermined speed.
The method of claim 5,

The outer side of the dust removal device body 10 is further provided with a control unit 20, the control unit is supplied to the motor speed controller 230 or the air amplifier 50 for controlling the speed of the rotary valve 132 Dust removing device of the synthetic resin raw material, characterized in that it comprises an air pressure regulator 250 for controlling the pressure of the compressed air.
The method of claim 1,

The inclined plate 160 is a dust removal device of the synthetic resin raw material, characterized in that provided with a slope of the cone shape.
The method of claim 1,

The dust collecting unit 70 is in communication with the other end 302 of the transfer pipe 30, synthetic resin raw material, characterized in that it comprises a cyclone dust collector 720 is integrally coupled with the dust removal device body 10 Dust removal device.
The method of claim 8,

The cyclone dust collector 720 further includes an air filtration tube 722 for discharging air excluding dust to the outside and a dust collecting container 760 provided at a lower portion of the cyclone dust collector to collect dust.

Between the cyclone dust collector and the dust collection container further comprises a conical wind stopper 740, dust removal device of the synthetic resin raw material.
The method according to any one of claims 1 to 9,

The air amplification unit 50 is a dust removal device of the synthetic resin raw material, characterized in that connected to the compressed air supply unit 560 including the compressed air generating means 562 and the compressed air supply line 564.