KR20220159745A - Waste plastic sorting device according to color - Google Patents

Abstract

The present invention relates to an apparatus for sorting waste plastic according to color. More particularly, provided is an apparatus for sorting waste plastic including: a supply unit through which waste plastic is supplied; a rotary sorting bin including a plurality of sorting bins for each color so that waste plastics are sorted and stored; a bowl feeder discharge track which transfers the waste plastic from the supply unit to the sorting bins for each color; and a color detecting unit for measuring information on waste plastic transported from the bowl feeder discharge track. According to the color of the waste plastic sensed by the color detecting unit, the waste plastic is sorted and stored.

Description

Waste plastic sorting device according to color {WASTE PLASTIC SORTING DEVICE ACCORDING TO COLOR}

The present invention relates to an apparatus for sorting waste plastics according to color.

Recently, the amount of plastic used is rapidly increasing, and accordingly, cost and environmental problems for treating waste plastics have emerged. Accordingly, in the prior art, there is an increasing awareness of recycling the waste plastic and utilizing it as a recycled product with high added value or spreading mechanical, physical, or chemical recycling technology. However, as the quality of recycled products and limitations on the application market are beginning to emerge depending on the contamination status of mixed waste plastics or the type and content of materials contained in them, more efficient separation by plastic material or various colors are used. Efforts are also being made to develop effective and useful sorting technologies for plastic products produced by mixing them.

Representative examples of the above plastics that are widely used in general and used as recycling materials include polystyrene, polyethylene, polypropylene, polyethylene terephthalate, and polyvinyl chloride.

However, in order to distinguish the different types of plastics, it is necessary to use manpower for various colors such as red, blue, and green as well as black and transparent colors, which requires a lot of time and energy. to be.

Accordingly, conventionally, near-infrared spectroscopy is mainly used for sorting according to the components of plastics, but there is also a difficulty in that the sorting efficiency for each material and color is low. In addition, when the waste plastics classified by component are sorted again by color, an automated sorting method is not provided, so they are still sorted manually.

Therefore, the need for an automated color sorting process is emerging.

Republic of Korea Patent Publication No. 10-2018-0044151 (2018.05.02.)

In order to solve the above problems, an object of the present invention is to provide a device for easily separating waste plastic wastes having various polymer colors to be discarded.

In addition, the present invention is to provide a waste plastic sorting device according to color that is more effective than a conventional waste plastic sorting device and can occupy less space through the above device.

In order to achieve the above object, the present invention provides a supply unit 100 to which waste plastic is supplied; a rotary sorter 200 including a plurality of sorting bins 210 for each color so that waste plastics are sorted and stored; a bowl feeder discharge track 300 for transferring the waste plastic from the supply unit 100 to the receiving unit 210; and a color detection unit 400 that measures information on waste plastic transported from the bowl feeder discharge track, wherein the waste plastic is selectively stored according to the color of the waste plastic sensed by the color detection unit 400. A waste plastic sorting device 1000 is provided.

The waste plastic sorting device according to the present invention includes a sorting unit 500 spaced apart from one end of the bowl feeder discharge track 300 at a regular interval but rotatable around a rotation axis; and a sorting controller 600 that is connected to the color detector 400 and determines the color of the waste plastic transported on the bowl feeder discharge track 300. It may be characterized in that the rotation angle of the sorting unit 500 is controlled according to the color of the waste plastic disposed on the bowl feeder discharge track 300.

According to one aspect of the present invention, the sorting unit 500 includes a rotating body 510 receiving waste plastic from the bowl feeder discharge track 300; A rotating shaft 520 connected to the lower end of the rotating body 510 and extending downward; a driving device 530 for rotating the rotating shaft 520; and a sorting member 540 whose upper end is connected to the rotating body 510 and whose lower end is inclined so as to extend outwardly of the rotating shaft, wherein the upper part of the rotating body 510 is opened to the bowl feeder discharge track ( 300), and the hollow of the rotating body 510 and the hollow of the sorting member 540 are connected so that the waste plastic is discharged to the lower end of the sorting member 540. (1000).

The present invention provides an apparatus for sorting waste plastic according to color, so that the pulverized plastic pieces can be effectively separated from the pulverized waste plastic.

In addition, the present invention can use the space of the waste plastic sorting device more efficiently than when using the conventional linear vibrating conveyor belt device by using the waste plastic sorting device.

In addition, the present invention can classify the corresponding plastic more accurately than a conventional air device or a plastic sorting device having an air ejector.

1 is a schematic diagram of a waste plastic sorting device of the present invention.
2 is a photograph of one example of a vibrating bowl feeder according to the present invention.

Hereinafter, the present invention will be described in more detail through specific examples or examples including the accompanying drawings. However, the following specific examples or examples are only one reference for explaining the present invention in detail, but the present invention is not limited thereto, and may be implemented in various forms.

Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms used in the description in the present invention are merely to effectively describe specific embodiments and are not intended to limit the present invention.

Also, the singular forms used in the specification and appended claims may be intended to include the plural forms as well, unless the context dictates otherwise.

In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated.

The conventional sorting of waste plastics has a disadvantage in that a wide facility is required. In particular, the vibration device for sorting and sorting the pulverized waste plastic pieces has a linear or S-shaped structure and takes up a lot of space.

In addition, there is a need for a waste plastic sorting device capable of automatically classifying not only the type but also the color of the waste plastic.

Therefore, in order to solve the above problems, the present invention is a supply unit 100 to which waste plastic is supplied; a rotary sorter 200 including a plurality of sorting bins 210 for each color so that waste plastics are sorted and stored; a bowl feeder discharge track 300 for transferring the waste plastic from the supply unit 100 to the color sorting bin 210; and a color detector 400 that measures information on waste plastic transported from the bowl feeder discharge track 300; It provides a waste plastic sorting device (1000) characterized in that the waste plastic is sorted and stored according to the color of the waste plastic detected by the color detection unit (400).

In addition, the sorting unit 500 includes a rotating body 510 receiving waste plastic from the bowl feeder discharge track 300; A rotating shaft 520 connected to the lower end of the rotating body 510 and extending downward; a driving device 530 for rotating the rotating shaft 520; and a sorting member 540 whose upper end is connected to the rotating body 510 and whose lower end is inclined so as to extend outwardly of the rotating shaft, wherein the upper part of the rotating body 510 is opened to the bowl feeder discharge track ( 300), and the hollow of the rotary body 510 and the hollow of the sorting member 540 are connected to each other to discharge the waste plastic to the lower end of the sorting member 540.

In order to describe the present invention in detail, it will be described with reference to FIG. 1 below.

Waste plastic is put into the supply unit 100, and the waste plastic may be pulverized waste plastic.

The supply unit may include, but is not limited to, a hopper 110, a hose control valve 120, and a vibrating bowl feeder 130.

The type of the pulverized waste plastic is not limited, but is not limited thereto as long as it is a commercially used plastic, and specifically may be polystyrene, polybutyl acrylate, polyethylene, polypropylene, and polyvinyl chloride.

The size of the pulverized waste plastic is not limited, but may be 0.1 to 50 cm, preferably 1 to 10 cm.

The vibrating bowl feeder 130 serves to regularly align randomly mixed parts and transfer them to the next working link.

The vibratory bowl feeder 130 may mainly have a cylindrical shape, but is not limited in shape. The vibratory bowl feeder 130 may be described in FIG. 2 as an example, but this is only an example and the shape is not limited.

The operating principle of the vibratory bowl feeder 130 is that the vibration motor included in the bowl feeder discharge track 300 generates force of a directional frequency and gives vibrations to plastic pieces so as to align them through a spiral track from bottom to top. and is transferred to the next track.

In addition, the bowl feeder discharge track 300 occupies less space than the conventional linear vibrating conveyor belt, so the space of the plastic sorting device can be efficiently used.

The size of the bowl feeder discharge track 300 is not limited thereto as long as it can accommodate the pulverized plastic pieces.

A bowl feeder discharge track 300 exists at the end of the vibratory bowl feeder 130, and as shown in FIG. will be transported

The bowl feeder discharge track 300 is inclined downward in the direction of one end, so that the pulverized plastic pieces on the vibrating bowl feeder 130 are arranged in a row by vibration, so that the bowl feeder discharge track 300 are transferred to

The plastic sorting device has a sorting unit 500 spaced apart from one end of the bowl feeder discharge track 300 at a regular interval but rotatable around a rotation axis, so that the pulverized plastic transported to one end of the bowl feeder discharge track 300 The plastic pieces may fall vertically by gravity and be introduced into the sorting unit 500 .

However, the pulverized plastic pieces have a pulverized chip holder 610 at one end of the bowl feeder discharge track 300 to prevent the pulverized plastic pieces from directly falling into the sorting unit 500 .

The pulverized plastic pieces by the pulverized chip holder 610 are stopped at one end of the bowl feeder discharge track 300, and while the pulverized plastic pieces are stopped, the pulverization in the color detector 400 The color of the plastic piece is detected, and information about this is transmitted to the selection control unit 600.

The detection of the color detector 500 may be a sensor such as an RGB sensor and a near infrared ray sensor, preferably an RGB sensor, but is not limited thereto.

The RGB (Red, Green, and Blue) sensors convert color signals into color signals and transmit them to the sorting control unit 600, and the transmitted color signals are converted into HSI (Hue color, saturation, saturation, and intensity) values and derived. The color of the plastic can be recognized by comparing the value with the HSI value for each color made in the existing database.

RGB color signals can be converted to HSI values using the following formula.

However, the RGB sensor is only an example and is not limited to the detection method.

The sorting control unit 600 determines whether the recognized components and colors correspond to predefined sorting target plastics, and if the sorting target plastics are found, the sorting control unit 600 collects the information and rotates the sorting unit 500 by the driving device 530. And, accordingly, the rotation angle of the sorting unit 500 connected to the driving device 530 can be controlled.

After the sorting unit 500 rotates, the pulverized chip holder 610 blocking one end of the conveyor 300 is opened, and the pulverized plastic pieces at one end of the bowl feeder discharge track 300 are transported to the feeder unit. Fall to (500).

The method of opening the pulverized chip holder 610 is not limited thereto, as long as the pulverized plastic can fall into the sorting unit.

The feeder unit 500 includes a rotating body 510 receiving waste plastic from the bowl feeder discharge track 300; A rotating shaft 520 connected to the lower end of the rotating body 510 and extending downward; a driving device 530 for rotating the rotating shaft 520; and a sorting member 540 whose upper end is connected to the rotating body 510 and whose lower end is inclined so as to extend outwardly of the rotating shaft, wherein the upper part of the rotating body 510 is opened to the bowl feeder discharge track ( 300), the hollow of the rotating body 510 and the hollow of the sorting member are connected, so that the waste plastic can be discharged to the lower end of the sorting member 540.

The pulverized plastic pieces are discharged to the sorting member 540 through the opening of the rotating body 510 of the feeder unit, and the sorting member 540 is inclined, so that the pulverized plastic pieces are moved to the lower end by gravity. can be emitted as

The direction of the sorting member 540 is controlled by the driving device 530 to the sorting bin 210 for each color, so that the pulverized plastic pieces may fall into the sorting bin 210 for each designated color.

The sorting bins 210 for each color are included in the rotary sorting box 200, and the sorting bins for each color 210 may have a plurality of pieces, and each of the sorting bins for each color 210 pulverizes a desired color. plastics can be collected.

This can classify the corresponding plastic more accurately than a conventional air device or a plastic sorting device with an air ejector, and it does not require a linear conveyor belt, so space efficiency is also very good.

The present invention will be described in more detail based on the following examples. However, the following examples are only one example for explaining the present invention in more detail, and the present invention is not limited by the following examples.

[Example]

Example 1 below describes a method for sorting red polyethylene among waste plastics being transported through the bowl feeder discharge track 300. Two plastics were used in the examples. Hereinafter, reference numerals correspond to reference numerals shown in FIG. 1 .

The pulverized plastic pieces including the red polyethylene resin and the green polyethylene resin are supplied to the hopper 110, and when the hopper 110 is sufficiently filled with the pulverized plastic pieces, the hopper control valve 120 is opened to The pulverized plastic pieces are poured into the vibratory bowl feeder (130).

The vibrating bowl feeder 130 is given vibration, and the pulverized plastic is transported to the bowl feeder discharge track 300 by the vibration. At this time, the pulverized plastic pieces are arranged in a line by the vibration of the vibrating bowl feeder 130 and transported.

As shown in FIG. 1, the transported pulverized plastic pieces measure the color of the plastic at the end of the bowl feeder discharge track 300 with the RGB sensor of the color detection unit 400, and pass through the RGB sensor to the control unit for sorting the color signal. It is forwarded to (600).

The sorting controller 600 converts the color signals of the RGB sensor into HSI values, compares the derived values with the HSI values for each color made in the database, recognizes that the colors of plastic are green, white, blue, and red, and sorts them. Kozaha confirms that there is a red color. Thereafter, the sorting control unit 600 rotates the driving device 530 of the sorting unit 500 according to the determined color, so that the direction of the sorting member 540 of the sorting part 500 is the direction of the rotary sorting cylinder. It is directed to the sorting bin 210 which is red.

Thereafter, the pulverized chip holder 610 is raised to 90° C., and the red plastic pieces measured at the end of the bowl feeder discharge track 300 are removed from the rotating body 510 of the sorting unit 500 by the inclination of the belt. It falls into the opening, and through the sorting member 540 of the sorting unit 500, the red plastic pieces are put into the red color sorting bin 210 of the rotary sorting bin.

The color sorting bin has a plurality of sorting bins as shown in FIG. 1 in addition to the red sorting bin, so that waste plastics can be quickly and accurately classified according to colors such as green, blue, and brown, respectively.

As described above, the present invention has been described by specific details and limited embodiments and drawings, but this is only provided to help a more general understanding of the present invention, the present invention is not limited to the above embodiments, and the present invention Those skilled in the art can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

Supply Department: 100
Hopper: 110
Hopper Control Valve: 120
Vibratory Bowl Feeder: 130
Carousel Sorter: 200
Sorting bins by color: 210
Bowl fitter discharge track: 300
Color detector: 400
Sorting unit: 500
Rotating body: 510
Axis of Rotation: 520
Drive: 530
Sorting member: 540
Sorting control unit: 600
Crushed Chip Holder: 610

Claims (3)

a supply unit through which waste plastic is supplied;
a rotary sorter including a plurality of accommodating parts to select and store waste plastics;
a bowl feeder discharge track transferring the waste plastic from the supply unit to the receiving unit; and
a color detector for measuring information on waste plastic transported from the bowl feeder discharge track;
Including,
The waste plastic sorting device, characterized in that the waste plastic is sorted and stored according to the color of the waste plastic sensed by the color detector. According to claim 1,
a sorting unit that is spaced apart from one end of the bowl feeder discharge track at a regular interval and is rotatable around a rotation axis; and
a sorting control unit that is connected to the color detection unit and determines the color of the waste plastic transported on the bowl feeder discharge track;
Including more,
The selection control unit,
Plastic sorting device, characterized in that for controlling the rotation angle of the feeder unit according to the color of the waste plastic disposed on the bowl feeder discharge track. According to claim 2,
The selection unit,
a rotating body receiving waste plastic from the bowl feeder discharge track;
a rotating shaft connected to the lower end of the rotating body and extending downward;
a driving device for rotating the rotating shaft; and
a sorting member whose upper end is connected to the rotating body and whose lower end is inclined so as to extend outwardly of the rotating shaft;
Including,
The upper part of the rotating body is opened to receive the waste plastic from the bowl feeder discharge track,
The plastic sorting device, characterized in that the hollow of the rotating body and the hollow of the sorting member are connected to discharge the waste plastic to the lower end of the sorting member.

Images