CN111921910A - PET plastic color sorter based on infrared spectrum and color sorting method thereof - Google Patents

PET plastic color sorter based on infrared spectrum and color sorting method thereof Download PDF

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Publication number
CN111921910A
CN111921910A CN202010658259.0A CN202010658259A CN111921910A CN 111921910 A CN111921910 A CN 111921910A CN 202010658259 A CN202010658259 A CN 202010658259A CN 111921910 A CN111921910 A CN 111921910A
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CN
China
Prior art keywords
infrared
infrared light
pet bottle
pet
conveying table
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Pending
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CN202010658259.0A
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Chinese (zh)
Inventor
程琳
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Zhejiang University of Technology ZJUT
Zhejiang Sci Tech University ZSTU
Zhejiang University of Science and Technology ZUST
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Zhejiang University of Technology ZJUT
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Application filed by Zhejiang University of Technology ZJUT filed Critical Zhejiang University of Technology ZJUT
Priority to CN202010658259.0A priority Critical patent/CN111921910A/en
Publication of CN111921910A publication Critical patent/CN111921910A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/36—Sorting apparatus characterised by the means used for distribution
    • B07C5/363—Sorting apparatus characterised by the means used for distribution by means of air
    • B07C5/365—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means
    • B07C5/366—Sorting apparatus characterised by the means used for distribution by means of air using a single separation means during free fall of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/463—Colour matching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0203—Separating plastics from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0279—Optical identification, e.g. cameras or spectroscopy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A PET plastic color sorter based on infrared spectrum and a color sorting method thereof comprise a feeding port, a conveying table, an infrared spectrometer, an infrared light intensity detector, a spray gun, a computer, wherein the feeding port is arranged at one end of the conveying table; the infrared spectrometer and the spectrometer are oppositely arranged and form a material channel, and the material channel is far away from the feeding port and is positioned below one end part of the conveying table; the spray gun is arranged at the lower end of the infrared spectrometer; the computer is connected with the infrared spectrometer, the infrared light intensity detector and the spray gun; the invention has nearly 100% accuracy by using the infrared absorption spectrum of the PET material as the basis for sorting impurities in the PET bottle flakes.

Description

PET plastic color sorter based on infrared spectrum and color sorting method thereof
Technical Field
The invention relates to the technical field of color sorters, in particular to a PET plastic color sorter based on infrared spectrum and a color sorting method thereof.
Background
According to the traditional color sorting device of the color sorter, a conveyor belt sends materials into a color sorting box, a lamp illuminates plastic bottle fragments in the color sorting box, meanwhile, a camera acquires images of the materials in the color sorting box and sends the images to a computer, the computer identifies the colors of the plastic bottle fragments in the images, a spray gun is controlled to spray gas according to a preset rule, corresponding falling materials are blown away, and then the material fragments with different colors are separated.
The existing color selector is based on an image recognition technology, bottle piece types are distinguished through different colors for screening, however, as the colors of partial bottle pieces (such as PVC bottle pieces) are close to those of PET bottle pieces, the bottle pieces screened in the mode are high in impurity, and when the PET bottle pieces mixed with the PVC bottle pieces are spun in a polyester process, silk threads are easily over-soft and broken, so that the recovery value of the PET bottle pieces is greatly reduced. On the other hand, the colors of the bottle pieces are recognized by the camera for classification, the classification result is easily influenced by ambient light, colored suspended dust in the factory environment, the color of window glass and light and shade change possibly influence the natural color of the bottle pieces, and misjudgment of image recognition is caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a PET plastic color sorter based on infrared spectrum
A PET plastic color sorter based on infrared spectrum comprises a feeding port, a conveying table, an infrared spectrometer, an infrared light intensity detector, a spray gun and a computer, wherein the feeding port is arranged at one end of the conveying table; the infrared spectrometer and the spectrometer are oppositely arranged and form a material channel, and the material channel is far away from the feeding port and is positioned below the end part of one end of the conveying table; the spray gun is arranged at the lower end of the infrared spectrometer; and the computer is connected with the infrared spectrometer, the infrared light intensity detector and the spray gun signal wire.
In one embodiment, a plurality of baffles for uniformly and flatly paving the PET bottle chips on the conveying table are further arranged on the conveying table.
In one embodiment, a spring is disposed on the baffle.
In one embodiment, the infrared spectrometer and the first fixing seat of the spray gun are fixed below the conveying table, the infrared light intensity detector is fixed at the position opposite to the infrared spectrometer through a second fixing seat, and the first fixing seat and the second fixing seat are arranged in parallel.
In one embodiment, a first roller is arranged above the material channel, a blanking port is formed by the first roller and one end of the conveying table, and the first roller is arranged at the upper end of the infrared light intensity detector and arranged on the second fixed seat.
In one embodiment, a first discharge port and a second discharge port are arranged below the material channel, wherein the first discharge port is a PET bottle chip discharge port, and the second discharge port is a non-PET bottle chip impurity discharge port.
In one embodiment, the infrared spectrometer comprises an instrument that can emit infrared light or detect the intensity of infrared light.
In one embodiment, the material passage is a narrow slit material passage.
A PET plastic color sorting method based on infrared spectrum is applied to the PET plastic color sorting machine based on infrared spectrum, and comprises the following steps;
step one; feeding cleaned PET bottle flakes into a feeding port, uniformly paving the PET bottle flakes fed from the feeding port and stacked on a conveying belt by a baffle plate on a conveying table, adjusting the density of the PET bottle flakes on the conveying table, horizontally paving the PET bottle flakes on the conveying table in a single layer manner, and slowly and uniformly feeding the PET bottle flakes to the next link from left to right;
step two; the density of PET bottle sheets falling into the material channel in free falling is controlled by controlling the rotating speed of the first roller and the conveying table;
step three; when the PET bottle sheet material passes through the material channel, the computer appoints the infrared spectrometer to modulate the infrared light with the wavelength at the position of the infrared spectrum absorption peak of the PET bottle sheet material to pass through the PET bottle sheet material; when infrared light with wavelength passes through the PET bottle piece, the PET bottle piece can absorb partial infrared light, non-PET plastics can not absorb the infrared light, the infrared light detector transmits detected infrared light intensity data to the computer, the computer compares the infrared light intensity data transmitted by the infrared light intensity detector with the emergent infrared light intensity of the infrared spectrometer to judge the infrared light absorption rate, when the infrared light intensity data is judged to be PET bottle pieces, the PET bottle pieces can freely fall to the first discharge port, and when the infrared light intensity data is judged to be non-PET bottle pieces, the computer controls the spray gun to blow non-PET materials into the second discharge port.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the bottle flake materials are analyzed by a spectrometer, so that the bottle flake materials with similar colors can be distinguished, the PVC material is particularly prevented from being mixed, and the classification accuracy of the bottle flakes is ensured; on the other hand, the light spectrometer is used for emitting light with a specific wavelength to penetrate through the bottle piece, the receiving intensity is detected by the light intensity sensor on the opposite side, and the light transmittance is determined according to the receiving intensity and the emitting intensity of the light spectrometer, so that whether the characteristics of the PET bottle piece are met is judged; meanwhile, the invention adopts the infrared spectrometer for color sorting, can identify PET, PVC and other bottle flake materials by only selecting a specific infrared band, and does not need to detect in a full-spectrum band, thereby greatly shortening the detection response time on the premise of ensuring the detection accuracy, and rapidly finishing the color sorting in the short falling process of the bottle flakes.
Figure of the invention
FIG. 1 shows a schematic diagram of the structure of the present invention.
In the figure, 10, a feeding port, 20, a conveying table, 21, a baffle, 22, a spring, 23, a first roller, 25, a blanking port, 30, an infrared spectrometer, 35, a material channel, 40, an infrared light intensity detector, 41, a first discharging port, 42, a second discharging port, 50 and a spray gun.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, characteristic details such as specific configurations and components are provided only to help the embodiments of the present invention be fully understood. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Example 1
As shown in FIG. 1, the invention provides a PET plastic color sorter based on infrared spectrum, which comprises a material inlet 10, a conveying table 20, an infrared spectrometer 30, an infrared light intensity detector 40, a spray gun 50 and a computer, wherein the material inlet 10 is arranged at one end of the conveying table 20, specifically as shown in the figure, the material inlet 10 is positioned at the upper left of the conveying table 20, so that cleaned PET bottle flakes are fed in; furthermore, a plurality of baffles 21 are arranged on the conveying table 20, one ends of the baffles 21 are fixed at the top of the channel of the conveying table 20 through hinges, and springs are arranged on the baffles 21, so that when the conveying table 20 slowly runs from left to right, the baffles 21 evenly and flatly lay the PET bottle flakes fed from the feeding port 10 onto the conveying belt, meanwhile, the baffles 21 adjust the density of the PET bottle flakes on the conveying table, and ensure that the PET bottle flakes are flatly laid on the conveying table 20 in a horizontal single layer mode, besides, the baffles 21 can also be used for adjusting the direction of PET bottle flake particles, and ensure that all the PET bottle flakes are flatly laid on the conveying belt on the conveying table 20, and a large number of PET bottle flakes are prevented from blocking the channel.
Further, the infrared spectrometer 30 and the infrared light intensity detector 40 are oppositely arranged and form a material channel 35, and the material channel 35 is far away from the material inlet 10 and is located below one end of the conveying table 20; specifically, the infrared spectrometer 30 and the infrared light intensity detector 40 are arranged opposite to each other and form a narrow slit material channel, and the narrow slit material channel is preferably formed by only laying PET bottle sheets on the conveying table 20 in a single layer.
Further, a first fixing seat for fixing the infrared spectrometer 30 and the spray gun 50 is arranged below the conveying table 20, the infrared light intensity detector 40 is fixed at a position opposite to the infrared spectrometer 30 through a second fixing seat, and the first fixing seat and the second fixing seat are arranged in parallel, so that the infrared spectrometer 30 and the infrared light intensity detector 40 are arranged oppositely and form a material channel 35, specifically, the first fixing seat is fixedly arranged below the conveying table 20, the second fixing seat is arranged opposite to the first fixing seat, the upper end of the second fixing seat is flush with the top of the conveying table 20, and the first fixing seat and the second fixing seat are arranged in parallel; and then the infrared spectrometer 30 and the spray gun 50 are arranged at one end of the first fixed seat, and the infrared light intensity detector 40 is arranged at one end of the second fixed seat and corresponds to the infrared spectrometer 30 to form a material channel 35.
Further, a first roller 23 is arranged above the material channel 35, a blanking opening 25 is formed by the first roller 23 and one end of the conveying table 20, and the first roller 23 is arranged at the upper end of the infrared light intensity detector 40 and is arranged on the second fixed seat, specifically, the blanking opening 25 is formed by the first roller 23 and one end of the conveying table 20 far away from the feeding opening 10, and the first roller 23 and the conveying table 20 are symmetrically arranged in parallel, so that the density of PET bottle sheet materials falling into the material channel 35 in free falling is controlled by controlling the rotating speed of the first roller 23 and the conveying table 20; meanwhile, the PET bottle flakes fall vertically under the action of the first roller 23, and the first roller rotates inwards at the same rotating speed as the conveying table.
Further, the computer is connected with the infrared spectrometer 30, the infrared light intensity detector 40 and the spray gun 50 through signal wires; the infrared spectrometer 30 and the infrared light intensity detector 40 are arranged oppositely to form a material channel 35, and the material channel 35 is far away from the feeding port 10 and is positioned below one end of the conveying table 20; wherein, the infrared spectrometer 30 comprises an instrument capable of emitting infrared light and detecting the intensity of the infrared light, in the present invention, the infrared spectrometer 30 comprises an instrument capable of emitting infrared light, so that the infrared spectrometer 30 is connected with the instrument capable of emitting infrared light through an optical fiber, specifically, an emitting end capable of emitting infrared light is arranged opposite to the infrared light intensity detector 40, so that when a PET bottle sheet passes through the material passage 35, the computer designates that the infrared light with the wavelength at the position of the infrared absorption peak of the PET bottle sheet modulated by the infrared spectrometer 30 is transmitted to the emitting end capable of emitting infrared light through the optical fiber and emits infrared light through the emitting end capable of emitting infrared light, the intensity data of the infrared light detected by the infrared light intensity detector 40 arranged opposite to the emitting end capable of emitting infrared light is transmitted to the computer, the computer compares the intensity data of the infrared light transmitted by the infrared light intensity detector 40 with the intensity of the infrared light emitted, and judging the infrared light absorption rate, wherein the PET bottle sheet can absorb part of infrared light, and the non-PET plastic cannot absorb the infrared light, so that the judgment is carried out according to whether the PET bottle sheet absorbs part of infrared light.
Further, a first discharge port 41 and a second discharge port 42 are arranged below the material channel 35, wherein the first discharge port 41 is a PET bottle piece discharge port, the second discharge port 42 is a non-PET bottle piece impurity discharge port, specifically, a partition plate is arranged below the material channel 35, the first discharge port 41 and the second discharge port 42 are formed by the partition plate, the first discharge port 41 is arranged on the left side, and the second discharge port 42 is arranged on the right side.
Further, the spray gun 50 is arranged at the lower end of the infrared spectrometer 30; specifically, the lance 50 is an instantaneous pulse type lance that instantaneously applies a transverse force to the non-PET material to blow off the free fall trajectory and thereby separate the impurities. When the computer judges that the PET bottle chips are not PET bottle chips, the computer controls the spray gun 50 to blow non-PET material into the second discharge port 42, thereby separating the PET bottle chips from impurities.
A PET plastic color sorting method based on infrared spectrum comprises the following steps;
step one; feeding cleaned PET bottle chips into a material inlet 10, uniformly paving the PET bottle chips fed from the material inlet 10 into a stack on a conveyor belt by a baffle 21 on a conveying table 20, adjusting the density of the PET bottle chips on the conveying table 20, horizontally paving the PET bottle chips on the conveying table in a single layer manner, and slowly and uniformly feeding the PET bottle chips to the next link from left to right;
the conveying table 20 is provided with a plurality of baffles 21, one ends of the baffles 21 are fixed at the top of a channel of the conveying table 20 through hinges, and springs are arranged on the baffles 21, so that when the conveying table 20 slowly runs from left to right, the baffles 21 evenly and flatly lay PET bottle flakes fed from the feeding port 10 onto the conveying belt, meanwhile, the baffles 21 adjust the density of the PET bottle flakes on the conveying table, and ensure that the PET bottle flakes are flatly laid on the conveying table 20 in a horizontal single layer mode, in addition, the baffles 21 can also be used for adjusting the direction of PET bottle flake particles, ensure that all the PET bottle flakes are flatly laid on the conveying belt of the conveying table 20, and prevent a large number of PET bottle flakes from blocking the channel.
Step two; the density of PET bottle sheets falling into the material channel 35 in free fall is controlled by controlling the rotating speed of the first roller 23 and the conveying table 20; specifically, the density of PET bottle sheets falling into the material channel 35 in free fall is controlled by controlling the rotating speed of the first roller 23 and the conveying table 20; meanwhile, the PET bottle flakes fall vertically under the action of the first roller 23;
step three; when the PET bottle sheet material passes through the material channel 35, the computer designates the infrared spectrometer 30 to modulate the infrared light with the wavelength at the position of the infrared spectrum absorption peak of the PET bottle sheet material to pass through the PET bottle sheet material; when infrared light with wavelength passes through the PET bottle pieces, the PET bottle pieces can absorb part of the infrared light, non-PET plastics cannot absorb the infrared light, the infrared light detector 40 transmits detected infrared light intensity data to the computer, the computer compares the infrared light intensity data transmitted by the infrared light intensity detector 40 with the emergent infrared light intensity of the infrared spectrometer 30 to judge the infrared light absorption rate, when the PET bottle pieces are judged to be PET bottle pieces, the PET bottle pieces can freely fall to the first discharge port 41, and when the non-PET bottle pieces are judged to be non-PET bottle pieces, the computer controls the spray gun 50 to blow non-PET materials into the second discharge port 42.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing illustrative embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A PET plastics look selection machine based on infrared spectrum which characterized in that: the device comprises a feeding port (10), a conveying table (20), an infrared spectrometer (30), an infrared light intensity detector (40), a spray gun (50) and a computer, wherein the feeding port (10) is arranged at one end of the conveying table (20); the infrared spectrometer (30) and the infrared light intensity detector (40) are oppositely arranged and form a material channel (35), and the material channel (35) is far away from the feeding port (10) and is positioned below one end part of the conveying table (20); the spray gun (50) is arranged at the lower end of the infrared spectrometer (30); the computer is connected with the infrared spectrometer (30), the infrared light intensity detector (40) and the spray gun (50) through signal lines.
2. The PET plastic color sorter based on infrared spectroscopy as claimed in claim 1, wherein: the conveying table (20) is further provided with a plurality of baffle plates (21) which are used for uniformly and flatly paving the PET bottle chips on the conveying table (20).
3. The PET plastic sorter based on infrared spectroscopy as claimed in claim 2, wherein: and a spring (22) is arranged on the baffle plate (21).
4. The PET plastic color sorter based on infrared spectroscopy according to claim 3, wherein: the infrared spectrometer is characterized in that a first fixing seat for fixing the infrared spectrometer (30) and the spray gun (50) is arranged below the conveying table (20), the infrared light intensity detector (40) is fixed at the relative position of the infrared spectrometer (30) through a second fixing seat, and the first fixing seat and the second fixing seat are arranged in parallel.
5. The PET plastic color sorter based on infrared spectroscopy according to claim 4, wherein: the material passageway (35) top is provided with first gyro wheel (23), first gyro wheel (23) with the one end of conveying platform (20) forms blanking mouth (25), just first gyro wheel (23) set up infrared light intensity detector (40) upper end and setting are in on the second fixing base.
6. The PET plastic color sorter based on infrared spectroscopy as claimed in claim 1, wherein: a first discharge hole (41) and a second discharge hole (42) are formed in the lower portion of the material channel (35), wherein the first discharge hole (41) is a PET bottle piece discharge hole, and the second discharge hole (42) is a non-PET bottle piece impurity discharge hole.
7. The PET plastic color sorter based on infrared spectroscopy as claimed in claim 1, wherein: the infrared spectrometer (30) comprises an instrument capable of emitting infrared light or detecting the intensity of the infrared light.
8. The PET plastic color sorter based on infrared spectroscopy as claimed in claim 1, wherein: the material channel (35) is a narrow slit material channel.
9. A PET plastic color sorting method based on infrared spectrum is characterized in that: comprises the following steps;
step one; feeding cleaned PET bottle chips into a feeding port (10), uniformly paving the PET bottle chips fed from the feeding port (10) on a conveying belt by a baffle (21) on a conveying table (20), adjusting the density of the PET bottle chips on the conveying table (20), horizontally paving the PET bottle chips on the conveying table in a single layer manner, and slowly and uniformly feeding the PET bottle chips to the next link from left to right;
step two; the density of PET bottle sheets falling into the material channel (35) in free falling is controlled by controlling the rotating speed of the first roller (23) and the conveying table (20);
step three; when the PET bottle sheet material passes through the material channel (35), the computer appoints the infrared spectrometer (30) to modulate the infrared light with the wavelength at the position of the infrared spectrum absorption peak of the PET bottle sheet material to pass through the PET bottle sheet material; when infrared light with wavelength passes through the PET bottle pieces, the PET bottle pieces can absorb part of infrared light, non-PET plastics cannot absorb the infrared light, the infrared light detector (40) transmits detected infrared light intensity data to the computer, the computer compares the infrared light intensity data transmitted by the infrared light intensity detector (40) with the emergent infrared light intensity of the infrared spectrometer (30) to judge the infrared light absorption rate, when the PET bottle pieces are judged, the PET bottle pieces can fall freely to the first discharge hole (41), and when the non-PET bottle pieces are judged, the computer controls the spray gun (50) to blow non-PET materials into the second discharge hole (42).
CN202010658259.0A 2020-07-09 2020-07-09 PET plastic color sorter based on infrared spectrum and color sorting method thereof Pending CN111921910A (en)

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CN202010658259.0A CN111921910A (en) 2020-07-09 2020-07-09 PET plastic color sorter based on infrared spectrum and color sorting method thereof

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CN202010658259.0A CN111921910A (en) 2020-07-09 2020-07-09 PET plastic color sorter based on infrared spectrum and color sorting method thereof

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH683674A5 (en) * 1992-03-23 1994-04-29 Buehler Ag Automatic handling, sorting and sepn. of waste material
JPH08300354A (en) * 1995-05-10 1996-11-19 Hitachi Ltd Plastic classifying apparatus
CN103480586A (en) * 2013-10-08 2014-01-01 合肥美亚光电技术股份有限公司 Dual infrared online plastic material sorting device
CN203778359U (en) * 2014-03-03 2014-08-20 安徽唯嵩光电科技有限公司 Plastic sorting machine for sorting PET (Polyethylene Glycol Terephthalate), PVC (Polyvinyl Chloride) and PP (Propene Polymer)
CN105752604A (en) * 2014-12-18 2016-07-13 驰马拉链（安徽）有限公司 Conveying belt special for zippers
CN107051914A (en) * 2017-05-15 2017-08-18 临武县华湘再生资源回收有限公司 Plastics bottle fragment color selector
CN208439853U (en) * 2018-07-13 2019-01-29 金塔县金畜源牧业有限公司 A kind of organic fertilizer production raw material transporting device
CN209633533U (en) * 2018-12-17 2019-11-15 南京钜力智能制造技术研究院有限公司 Plastic bottle sorting system based on infrared spectroscopy

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH683674A5 (en) * 1992-03-23 1994-04-29 Buehler Ag Automatic handling, sorting and sepn. of waste material
JPH08300354A (en) * 1995-05-10 1996-11-19 Hitachi Ltd Plastic classifying apparatus
CN103480586A (en) * 2013-10-08 2014-01-01 合肥美亚光电技术股份有限公司 Dual infrared online plastic material sorting device
CN203778359U (en) * 2014-03-03 2014-08-20 安徽唯嵩光电科技有限公司 Plastic sorting machine for sorting PET (Polyethylene Glycol Terephthalate), PVC (Polyvinyl Chloride) and PP (Propene Polymer)
CN105752604A (en) * 2014-12-18 2016-07-13 驰马拉链（安徽）有限公司 Conveying belt special for zippers
CN107051914A (en) * 2017-05-15 2017-08-18 临武县华湘再生资源回收有限公司 Plastics bottle fragment color selector
CN208439853U (en) * 2018-07-13 2019-01-29 金塔县金畜源牧业有限公司 A kind of organic fertilizer production raw material transporting device
CN209633533U (en) * 2018-12-17 2019-11-15 南京钜力智能制造技术研究院有限公司 Plastic bottle sorting system based on infrared spectroscopy

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
周太明等: "《电气照明设计》", 30 November 2001, 复旦大学出版社 *
杨扬等: "《稻谷加工设备使用与维护》", 30 April 2011, 中国轻工业出版社 *
魏德洲: "《固体物料分选学》", 31 August 2008, 冶金工业出版社 *

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