WO2007091851A1

WO2007091851A1 - Powder filling apparatus

Info

Publication number: WO2007091851A1
Application number: PCT/KR2007/000678
Authority: WO
Inventors: Soon-Ju Chang
Original assignee: Soon-Ju Chang
Priority date: 2006-02-10
Filing date: 2007-02-08
Publication date: 2007-08-16

Abstract

As stated in detail so far, as the powder filling apparatus according to this invention has a chamber shaped like a hopper and a discharge tube inside the chamber to intake the air generated during the conveyance of powder by using a dust collecting fan, it does not need a filter, can convey powder using low pressure, and does not require exhaust process, improving product ivivy. As the conveyor according to this invention, as opposed to the existing conveyor, does not require powder filling apparatus, allowing to make it compact. Additionally, as there is no technology available as of now to fill the chamber by sucking in the air in the metering contailner, the same amount of air as is filled in the chamber is discharged from the metering contailner, making a loss of powder and raw material in the discharged air. In the mean while, this system can save cost from loss of raw material as it can operate while the inlet of the metering container closed, i.e. liquid filling.

Description

[DESCRIPTION]

[Invention Title] _ POWDER FILLING APPARATUS

[Technical Field]

A powder filling apparatus which conveys only fine powder from the container after removing the particulate wihtout using a filter is disclosed now. The powder filling apparatus according to this invention is composed of venturi tubes with multiple paths, powder intake tubes on each path,chambers on air supply tubes and discharge tubes, and dust collecting fans connected to chambers to suck in particulate from fine powder.

The chamber has a shape of Hopper with a chamber end at the bottom and the end of discharge tube, which is established vertically inside the chamber, keeps a distance from the chamber end. Fine powder makes a fall, driven by the pressure of air flowing from air intake tube of venturi tube and goes into metering container through chamber end at the bottom of a chamber and as the air in the metering container as well as particulate and the air flowing through chamber end are discharged separately due to suction force, making filters unnecessary, fine powder can be conveyed with low pressure and a separate powder filling equipment is not needed for^' powder filling, allowing to make the system compact.

[Background Art]

This invention is about powder filling apparatus More specifically it is about a powder filling apparatus that can convey specified amount of toner or medicine consisting of fine powder hazardous to human health safely.

Fig.l briefly illustrates the existing powder filling apparatus. According to this Figure, the existing powder filling apparatus consists of a container(1-1) with powder,a chamber(2) which temporarily stores powder sucked in by small amount from the container(1), a vacuum pump(3) used to suck in and transport the stored powder. The vacuum pump tube is a venturi tube shaped like a cross. As high pressure air is flown in to 3a and exit to 3b creating negative pressure inside the tube by venturi effect, powder^' in the chamber(2) is sucked in from 3a and discharged to 3b.

Meanwhile, it is unavoidable to have particulate during the conveyance of powder.Particulate finer than powder is filtered out by the filter(4) inside the chamber(2) and discharged to the outside through another ρath(3d) of the vacuum pump(3).

However, as the existing powder filling apparatus has a filter(4) inside the chamber(2), it requires high pressure. As stated in detail, it additionally needs an exhaust process to remove particulate in powder after sucking in and conveying powder. It also requires a separate powder filling apparatus(δ) to fill powder in the chamber(2). The existing powder can not avoid centrifugal force stemming from rotation of auger during filling up and an issue of becoming bigger as a separate suction apparatus is necessary to remove particulate generated as the same amount of air as is filled in the chamber gets discharged from the metering container creating a lot of particulate along with the air flown out.

[Disclosure]

It is about a powder filling apparatus that can convey specified amount of toner or medicine consisting of fine powder hazardous to human health safely. This invention aims to solve the above mentioned issues with the existing powder filling apparatus. More specifically it aims to provide a powder filling apparatus that can convey only powder after removing particulate from the container whithout using a filter.

It also intends to make the conveyor compact, enhance productivity through process simplification, and achieve cost saving by minimizing the loss of raw material.

[Technical Problem]

Existing facilities are of the type that fills the powder using an auger after storing into the chamber. After being stored, powder tends to be changed to solid matter and chamber end are often clogged. And a large amount of dust and heat are generated by a centrifugal force to revolute an auger.

[Technical Solution]

If this invention is applied, even in any type of vacuum transporter and pump, the powder can be filled with air without storing into the chamber and clogging does not occur. Furthermore the air that causes to form the dust can be collected by a collecting fan, there will be neither dust nor heat

[Description of Drawings]

Fig.l briefly illustrates the existing powder filling apparatus. Fig.2 briefly illustrates the powder filling apparatus of this invention. Fig.3 briefly illustrates the opening of the powder filling apparatus of this invention.

6. Metering container 7. Load cell 10. Venturi tube 11. Powder suction tube 12. Air supply tube 13. Discharge tube 20. Chamber 22, Chamber end 30. Dust collecting fan 31.Duct 40. Suction part 49, An air hole 50. Opening shaped like a horn

51. Piston

[Best Mode] _ [Mode for Invention]

[Industrial Applicability] Aim and Mechanism of the invention. To serve the obove mentioned aim, the powder filling apparatus of invention is composed of venturi tubes with multiple paths, powder intake tubes on each path, chambers on air supply tubes and discharged tubes, and dust collecting fans connected to chambers to suck in particulate from fine powder. The chamber has a shape of Hopper with a chamber end at the bottom and the end of discharge tube, which is established vertically inside the chamber, keeps a certain distance from the chamber end

According to this invention, the said dust collecting fan is on the piping duct(31) while the piping duct is on the upper part of the said chamber.

The said powder suction tube has more suction parts consisting of a chamber, a rotation axis penetrating the chamber, a motor driving the rotation axis, and a rotation whing on the rotation axis generation suction force during rotation.

From now on, more detailed explanation about powder filling apparatus of desirable working example will be provided with the help of the attached drawing.

Fig. 2 briefly illustrates the powder filling apparatus of this invention. According to this figure, the powder filling apparatus of this invention consists of multiple connecting tube(ll,12,13), a venturi tube with multiple paths connecting between each connecting tubes(lθ), a chamber on a side of venturi tube(lθ), and a dust collecting fan(30) on the chamber(20).

According to this invention, the venturi tube(lθ) is a pipe with three holes with one connected to powder suction tube(ll), another to air supply tube(12), and the other to discharge tube(13)

Powder suction tube(ll) is connected to the container(l) storing powder, and in the middle of it, has a joint part(lla) such as bellows or universal joints allowing easy suction of powder while it has suction part(40) at the end. Air supply tube(12), with a compressor or various pumps(12a) connected, is to create pressure in venturi tube(lθ) used to transport powder. It is prepared with a conventional flexible tube and regulator(12b) for controlling air volume.

Discharge tube(13),as is stated for the existing technology, is to discharge powder and air out of the venturi tube(lθ) on venturi effect. As it has a certain length, it is kept inside the chamber(20) .

Chamber(20) is prepared in the shape of hopper and supported in the shape of inverted triangle by base. As shown in the Fig., a venturi tube(lθ) is connected on the upper side of the chamber(20) and an chamber end(22) is available on the lower part of the chamber, allowing powder that passed though discharge tube(13) connected to the venturi tube(lθ) to be discharged to the outside after going through the chamber(20).

At the chamber end, a horn shaped opening opens and closes with up and down movement(piston,solenoid,screw,etc.) in accordance with the cross-section shape of a pipe on the chamber end, i.e. corn shaped opening for a pipe with a round cross-section, trigonal pyramid shaped opening for a pipe with a triangle shaped cross-secton. Horn shape does not hinder the flow of powder while it allows for a precise measuring of powder as it is set up at the end of chamber end.

According to this invention, the discharge tube(13) in the chamber(20) is established vertically and the end of discharge tube(13) stands at a distance from the chamber end(22) . This is to allow the powder to get out of chamber end(22) driven by the pressure of air flowing from air suction tube of venturi tube while making particulate and air discharged to the outside through the gap driven by the dust collecting fan(30) on the upper part of the chamber(20). As mentioned above, dust collecting fan(30) is to suck in and discharge the air only from the powder and includes powder controlling device(32) such as trans and slidacs. Dust collecting fan(30)is connected to the chamber(20) via duct(31) and preferably set up on the upper part of the chamber(20) away from the chamber end(22). This is to prevent the suction of powder itself as it is set up too closely.

Let us take a look at the mechanism of powder filling apparatus of this invention with above mentioned organization. In the drawing, dotted line means the flow of air while thick solid line symbolizes the flow of powder.

First of all, connect powder suction tube(ll) to the container(l) storing powder to transport small amount of powder. Move the powder suction tube adequately using joint part(lla) inside the powder container(l) at a regular interval .

Then supply air to venturi tube(lθ) through air supply tube(12) allowing the air to get out of discharge tube(13), which creates a negative pressure in the venturi tube and as a result(10), powder begins to move to discharge tube(13) through powder suction tube.

The powder flown into the chamber(20) through discharge tube(13) makes a fall driven by the pressure of the air flowing from air suction tube of venturi tube then exits to the metering container(6) through chamber end on the bottom of chamber. Particulate and air is discharged to the outside after being sucked up to dust collecting tray(33) driven by suction force created by dust collecting fan(30) in the space between the end of the discharge tube(13) and chamber end(22). Thanks to the suction powder of dust collecting fan(30), the air flowing from air supply tube through discharge tube and the air in the container sucked in without generating particulate from powder falling to the metering container. The rotation speed of dust collecting fan(30) is properly controlled by the pressure set on the air supply tube(2).

Meanwhile, Fig.2 illustrates powder suction tube of powder filling apparatus of this invention and it has suction part at the end of the powder suction tube to easily suck in powder.

This suction part(40) consists of a chamber(41) shaped like a cylinder, a rotation axis(44) penetrating the chamber, a motor(46) driving the rotation axis, and a rotation wing(48) on the rotation axis generating suction force during rotation. Rotation wing(48) can have bars or plates with inclination distanced from each other with they are crossed over or adopt impeller.

On the lower part of chamber shaped like a cylinder, an air hole is provided for air suction.

With this suction part(40) set up at the end of the powder suction tube(ll), it can easily suck in powder using the pressure lower than for the existing conveyor .

Claims

O[CLAIMS]

1. A powder filling apparatus consisting of venturi tubes(even in any type of vaccum transporter and pump) consiting of multiple paths, powder intake tube on a path of the above mentioned venturi tubes(even in any type of vaccum transporter and pump) air supply tube on another path of the above mentioned venturi tubes(even in any type of vaccum transporter and pump),discharge tube on other path of the said venturi tube(even in any type of vaccum transporter and pump),a chamber on the said discharge tube, a dust collecting fan used to suck in particulate from powder while connected to the said chamber, which is shaped like a hopper with a chamber end at the bottom, and the end of discharge tube, which is established vertically inside the chamber, keeps a certain distance from the chamber end.

2. A powder filling apparatus with the said piping duct on the upper part of the chamber and the said dust collecting fan on the piping duct.

3. A powder filling apparatus with a opening shaped like a horn, which can precisely meter powder, at the end of the said chamber end.

4. A powder filling apparatus with a suction and an air hole on the its lower part,which enables easy suction of powder from the end of powder suction tube, consisting of a chamber, a rotation axis penetrating the chamber, a motor driving the rotation axis, and a rotation wing on the rotation axis generating suction force during rotation.