JP6435930B2 - Resin type identification device - Google Patents

Description

  The present invention relates to a resin type identification device that identifies a recycled resin for each composition by an optical technique, and more particularly to a resin type identification device that uses an infrared spectrophotometer (hereinafter abbreviated as “FTIR”) as an identification unit.

  When recycling resin in waste home appliances, the parts that can be dismantled by hand are limited. For this reason, small parts and parts with complicated structures need to be pulverized mechanically to select metals, resins, and the like, and then used as recycled materials. In this case, since it is required to select each material from the pulverized and mixed state, an advanced sorting technique is required. Among these, metals are selected by specific gravity, electric or magnetic force. On the other hand, for the selection of resins (for example, polypropylene (PP), polystyrene (PS), acrylonitrile butadiene styrene (ABS), etc.) An identification method focusing on the difference in wavelength (wave number) dependence has been proposed.

  As such an identification method, there is a method (infrared spectroscopy) in which resin pieces (shredder dust) are sequentially conveyed by a conveyor and identified by a diffuse reflection method using a Fourier transform infrared spectrophotometer (for example, a patent) Reference 1).

FIG. 5 is a plan view showing a configuration of a conventional resin type identification device, and FIG. 6 is a side view of the resin type identification device shown in FIG. One direction horizontal to the ground is defined as an X direction, a direction horizontal to the ground and perpendicular to the X direction is defined as a Y direction, and a direction perpendicular to the X direction and the Y direction is defined as a Z direction.
The resin type identification device 100 includes an infrared light source unit 10 that emits infrared light, an infrared light detection unit 20, a sample placement unit 130 on which a resin piece S as a sample is placed, and a control unit 150. .

  The infrared light source unit 10 includes an infrared light source 12 that emits infrared light, a main interferometer main unit 40 that creates an interferogram, plane mirrors 13 and 14, and a parabolic mirror (condensing mirror) 11. Is provided. The infrared light emitted from the infrared light source 12 is applied to the beam splitter 42 of the main part 40 of the main interferometer.

  In the main part of the main interferometer 40, a movable mirror unit 41 including a movable mirror 41a, a beam splitter 42, and a fixed mirror unit 43 including a fixed mirror 43a are arranged. According to the main part 40 of the main interferometer, the infrared light emitted from the infrared light source 12 is applied to the beam splitter 42, and is split by the beam splitter 42 into two directions of the movable mirror 41a and the fixed mirror 43a. Is done. The infrared light reflected by the movable mirror 41a and the infrared light reflected by the fixed mirror 43a return to the beam splitter 42, and these infrared lights are combined by the beam splitter 42 and passed through the plane mirrors 13 and 14. It is sent to the parabolic mirror 11. At this time, since the movable mirror 41a reciprocates back and forth in the incident optical axis direction M, the difference in the optical path length of the divided two light beams changes periodically, and travels from the beam splitter 42 toward the parabolic mirror 11. Light becomes an interferogram whose amplitude varies with time.

  The infrared light detection unit 20 includes an infrared detector 21 that detects an interferogram (infrared light) and two parabolic mirrors (condensing mirrors) 22 and 23.

As shown in FIG. 6, the sample placement unit 130 is placed in the lower stage of the resin type identification device 100 and moves the transport belt (sample placement plate) 131 and the transport belt 131 in a predetermined direction (Y direction). A drive mechanism (not shown). The resin piece S is placed on the upper surface of the transport belt 131.
A parabolic mirror 11 for reflecting light to the lower right is provided at the upper left of the transport belt 131, and a light for reflecting light from the lower left is disposed at the upper right of the transport belt 131. An object mirror 22 is provided. Thereby, for example, when the resin piece S2 is arranged at a predetermined position, the light collected by the parabolic mirror 11 is irradiated to the first measurement point C1 on the upper surface of the resin piece S2, and the first of the upper surface of the resin piece S2 is irradiated. The light reflected at one measurement point C 1 is converted into parallel light by the parabolic mirror 22, and the parallel light is condensed on the infrared detector 21 by the parabolic mirror 23.

  According to such a sample arrangement unit 130, after placing a plurality of resin pieces S (first resin piece S1, second resin piece S2, third resin piece S3,...) On the conveyor belt 131, By moving the conveyor belt 131 in a predetermined direction by the drive mechanism, the first resin piece S1 is arranged at a predetermined position, and then the second resin piece S2 is arranged at a predetermined position in order. One resin piece S is arranged at each position.

  The control unit 150 includes a light intensity information acquisition unit that acquires reflected light intensity (light intensity information) from the infrared detector 21, and a sample measurement unit that creates an absorption spectrum of each resin piece S based on the acquired light intensity information. And a resin type discriminating unit for discriminating the type of each resin using the obtained absorption spectrum.

International Publication WO2012 / 147717

  However, although the resin piece Sn is sorted for each resin type by the resin type identification device 100, there are cases where the resin piece Sn cannot be accurately sorted for each resin type in a resin recycling factory in a waste home appliance. It was.

In order to solve the above-mentioned problems, the present inventor has intensively studied a resin type identification device that can accurately sort resin pieces (samples) for each resin type.
When a resin piece (shredder dust) Sn obtained by pulverizing a molded product such as a home appliance at a recycling factory or the like is selected by the resin type identification device 100, the resin piece Sn is pulverized to about 5 mm to 20 mm. In many cases, the surface of the resin is painted or a film or the like is bonded. Therefore, when the light reflected from the upper surface of the resin piece Sn is detected by the infrared detector 21, an absorption spectrum of the material contained in the paint or film is obtained, and measurement is performed depending on which surface of the resin piece Sn is measured. The results were found to be different.
Therefore, the present inventors decided to measure both the upper surface and the lower surface of the resin piece Sn. As a result, it was found that if the measurement result of the upper surface of the resin piece Sn and the measurement result of the lower surface of the resin piece Sn are different, it is determined that the surface is coated or a film or the like is bonded.

That is, the resin type identification device of the present invention includes a first infrared light source unit that irradiates infrared light on the upper surface of a sample made of resin, and first light intensity information of infrared light reflected by the upper surface of the sample. A first infrared spectrophotometer including a first infrared light detection unit; a second infrared light source unit that irradiates infrared light onto the lower surface of the sample; and a second light intensity of infrared light reflected from the lower surface of the sample A second infrared spectrophotometer comprising a second infrared light detector for detecting information, the first infrared light detector of the first infrared spectrophotometer and the second infrared spectrophotometer The second infrared light detection unit is disposed with the sample interposed therebetween, and includes a control unit that evaluates the uniformity of the composition of the sample based on the first light intensity information and the second light intensity information. I am doing so.

  According to the resin type identification device of the present invention, since both the upper surface and the lower surface of the sample are measured, the sample can be accurately selected.

(Means and effects for solving other problems)
In the above invention, the first infrared light source unit includes a condensing mirror, irradiates infrared light from the condensing mirror to the first measurement point on the upper surface of the sample, and detects the first infrared light. The part has a condensing mirror and obtains the first reflected light intensity by condensing the infrared light reflected at the first measurement point on the upper surface of the sample to the detector, and the second infrared light source part is , Irradiating infrared light to the second measurement point on the lower surface of the sample from the condensing mirror, the second infrared light detection unit has a condensing mirror, and You may make it obtain 2nd reflected light intensity | strength by condensing the infrared light reflected in the 2nd measurement point to a detector.

In the above invention, a sample mounting plate that is movable in a predetermined direction is provided, and the sample mounting plate is moved so that the sample is disposed at a predetermined position where infrared light is irradiated. May be.
Here, the “predetermined position” is a position where infrared light is irradiated from the infrared light source unit and the reflected infrared light is sent to the infrared light detection unit, and is determined in advance by a designer or the like. The “predetermined direction” is also predetermined by a designer or the like.

And in the said invention, before the said sample is arrange | positioned in a predetermined position, you may make it provide the shaping part which shapes the upper surface and / or lower surface of the said sample.
Furthermore, in the above invention, after the upper surface and / or lower surface of the sample is shaped, the sample passes through a passage provided with a wall surface having a predetermined interval in the vertical direction, and a predetermined position is set in the passage. You may be made to do.
According to such a resin type identification apparatus of the present invention, accurate measurement can be performed regardless of the shape and dimensions of the sample.

The top view which shows the structure of the resin kind identification device which concerns on 1st embodiment of this invention. The side view of FIG. The top view which shows a structure when the apparatus of FIG. 1 is seen from the back surface. The side view which shows the structure of the resin kind identification device which concerns on 2nd embodiment of this invention. The top view which shows the structure of the conventional resin kind identification device. The side view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, and includes various modes without departing from the spirit of the present invention.

<First embodiment>
FIG. 1 is a plan view showing the configuration of a resin type identification device according to the first embodiment of the present invention, FIG. 2 is a side view of the resin type identification device shown in FIG. 1, and FIG. It is a top view which shows a structure when this resin kind identification device is seen from the back surface. In addition, about the thing similar to the resin kind identification device 100 mentioned previously, description is abbreviate | omitted by attaching | subjecting the same code | symbol.
The resin type identification device 1 includes a first infrared light source unit 10 that emits infrared light, a first infrared light detection unit 20, a second infrared light source unit 110 that emits infrared light, and a second red light source. An external light detection unit 120, a sample placement unit 30 on which a resin piece Sn serving as a sample is placed, and a control unit 50 are provided.

  In addition, the resin piece Sn in this embodiment is a thing (shredder dust) which grind | pulverized the waste household appliance in about 5 mm-20 mm in the recycling factory etc., for example. In the present invention, in order to reuse the resin piece Sn as a new product material, the resin piece Sn is separated for each resin type (for example, polypropylene (PP), polystyrene (PS), acrylonitrile butadiene styrene (ABS), etc.)). And used to identify mixtures (non-recyclable).

The second infrared light source unit 110 includes an infrared light source 112 that emits infrared light, a main interferometer main unit 140 that creates an interferogram, plane mirrors 113 and 114, and a parabolic mirror (condenser mirror). 111. The infrared light emitted from the infrared light source 112 is applied to the beam splitter 142 of the main interferometer main part 140.
The second infrared light detection unit 120 includes an infrared detector 121 that detects an interferogram (infrared light) and two parabolic mirrors (condensing mirrors) 122 and 123.

  The sample placement unit 30 is placed in the middle of the resin type identification device 1, and is placed above (in the Z direction) the lower transport belts (sample mounting plates) 33, 34 and the lower transport belts 33, 34. The upper transport belts 31 and 32, the drive mechanism (not shown) for moving the upper and lower transport belts 31 to 34 in a predetermined direction (Y direction), the sample transfer plate 35, and the rubber roller section (shaping section) 60 are provided. Prepare.

The upper conveyance belts 31 and 32 are arranged in parallel with a gap (opening) P1 having a predetermined interval Δx in the X direction, and the lower conveyance belts 33 and 34 are gaps (with a predetermined interval Δx in the X direction). Opening) P2 is opened and arranged in parallel.
The “predetermined interval Δx” is determined in advance by a designer or the like, and is 3 mm, for example.

  As shown in FIG. 1, the resin piece Sn has a left portion (part) pressed against the lower surface of the upper conveyor belt 31 and a right portion (part) pressed against the upper surface of the upper conveyor belt 32. As a result, the central portion (first measurement point) C1 of the upper surface of the resin piece Sn is disposed in the gap P1 between the upper conveyance belts 31 and 32. Further, as shown in FIG. 3, the resin piece Sn has a left portion (part) placed on the upper surface of the lower transport belt 33 and a right portion (part) placed on the upper surface of the lower transport belt 34. Will be. Thereby, the central portion (second measurement point) C2 of the lower surface of the resin piece Sn is disposed in the gap P2 of the lower conveyance belts 33 and 34.

Then, at a predetermined position where the infrared light is irradiated, as shown in FIG. 2, the path between the upper conveyor belts 31 and 32 and the lower conveyor belts 33 and 34 is a path having a predetermined interval Δz _1. A cylindrical upper first rotating roller 63 and an upper second rotating roller 64, and a cylindrical lower first rotating roller 65 and a lower second rotating roller 66 are arranged. Specifically, the space between the upper first rotating roller 63 and the lower first rotating roller 65 is a predetermined interval Δz ₁ and is disposed in front of the predetermined position (−Y direction). Further, the distance between the upper second rotating roller 64 and the lower second rotating roller 66 is also a predetermined distance Δz ₁ , which is arranged behind the predetermined position (Y direction).
The “predetermined interval Δz ₁ ” is determined in advance by a designer or the like, and is, for example, 5 mm.

The rubber roller portion 60 includes a cylindrical upper rubber roller 61 and a cylindrical lower rubber roller 62. A space between the upper rubber roller 61 and the lower rubber roller 62 is a predetermined interval Δz ₂ and is disposed in front of the upper and lower conveying belts 31 to 34 (−Y direction).
The “predetermined interval Δz ₂ ” is determined in advance by a designer or the like, and is, for example, 5 mm.

According to such a sample placement unit 30, the resin piece Sn is pressed while passing through the gap Delta] z ₂ between the lower surface and the upper surface of the lower rubber roller 62 of the upper rubber roller 61, the pressed resin piece Sn the upper conveyor belt It moves between the lower surfaces 31 and 32 and the upper surfaces of the lower conveyor belts 33 and 34. Then, the upper and lower transport belts 31 to 34 move in a predetermined direction, whereby the resin piece Sn moves to a predetermined position. As the resin pieces Sn pass through the predetermined distance Δz ₂ between the lower surface of the upper rubber roller 61 and the upper surface of the lower rubber roller 62 in this way, the resin pieces Sn are sequentially arranged at predetermined positions one by one.

A parabolic mirror 11 for reflecting light to the lower right is provided at the upper left of the upper transport belts 31 and 32, and light from the lower left is disposed at the upper right of the upper transport belts 31 and 32. A parabolic mirror 22 for reflecting the light is provided. Thereby, when the resin piece Sn is arranged at a predetermined position, as shown in FIG. 1, the light condensed by the parabolic mirror 11 is a gap between the upper conveyance belt 31 and the upper conveyance belt 32. The light passing through P1 and irradiating the first measurement point C1 on the upper surface of the resin piece S and reflected by the first measurement point C1 on the upper surface of the resin piece S is again a gap between the upper conveyance belt 31 and the upper conveyance belt 32. The light passes through P1 and is converted into parallel light by the parabolic mirror 22, and the parallel light is condensed by the parabolic mirror 23 onto the infrared detector 21.
When the resin piece Sn does not exist at a predetermined position, the light collected by the parabolic mirror 11 passes through the gap P1 between the upper conveyance belt 31 and the upper conveyance belt 32, and further lower conveyance. Since it passes straight through the gap P <b> 2 between the belt 33 and the lower conveyance belt 34, it does not reach the infrared detector 21 or the infrared detector 121.

Further, a parabolic mirror 111 for reflecting light to the upper left is provided at the lower right of the lower transport belts 33 and 34, and from the upper right to the lower left of the lower transport belts 33 and 34. A parabolic mirror 122 for reflecting the light is provided. As a result, when the resin piece Sn is disposed at a predetermined position, the light collected by the parabolic mirror 111 is placed between the lower conveyor belt 33 and the lower conveyor belt 34 as shown in FIG. The light passing through the gap P2 and irradiating the second measurement point C2 on the lower surface of the resin piece Sn and reflected by the second measurement point C2 on the lower surface of the resin piece Sn is again transmitted to the lower conveyance belt 33 and the lower conveyance belt 34. The parallel light passes through the gap P2 between the two and is made parallel light by the parabolic mirror 122, and the parallel light is condensed on the infrared detector 121 by the parabolic mirror 123.
When the resin piece Sn is not present at a predetermined position, the light collected by the parabolic mirror 111 passes through the gap P2 between the lower conveyance belt 33 and the lower conveyance belt 34, and further on the upper side. Since it passes straight through the gap P1 between the transport belt 31 and the upper transport belt 32, it does not reach the infrared detector 21 or the infrared detector 121.

  The control unit 50 continuously emits infrared light from the infrared light source 12 and acquires a first reflected light intensity (first light intensity information) from the infrared detector 21; A second light intensity information acquisition unit that continuously emits infrared light from the infrared light source 112 and acquires second reflected light intensity (second light intensity information) from the infrared detector 121; A first sample measurement unit that creates an absorption spectrum of each resin piece Sn based on the first sample measurement unit, a second sample measurement unit that creates an absorption spectrum of each resin piece Sn based on the second reflected light intensity, and a first sample measurement unit A first resin type discriminating unit that discriminates the type of each resin using each absorption spectrum created in step 1 and a first type that discriminates each resin type using each absorption spectrum created by the second sample measurement unit. The resin type discriminated by the two resin type discriminating unit and the first resin type discriminating unit And a evaluation unit for evaluating the homogeneity of the composition of the resin pieces Sn based on the type of the resin is determined by the second resin type discriminating unit.

The first sample measurement unit determines whether or not the resin piece Sn is at a predetermined position based on the change in light intensity with time in the first reflected light intensity, and determines each resin piece Sn and each absorption spectrum information. Association is performed and control is performed to create an absorption spectrum of each resin piece Sn.
The function of the first sample measurement unit will be specifically described. If the reflected light intensity is less than a predetermined light intensity threshold, it is determined that the first resin piece S1 is not disposed at a predetermined position, and the reflected light intensity is If it becomes more than a predetermined light intensity threshold value, it will determine with the 1st resin piece S1 having been arrange | positioned in a predetermined position, and if the reflected light intensity becomes less than a predetermined light intensity threshold value, the 1st resin piece S1 will be from a predetermined position. An absorption spectrum of the first resin piece S1 is created based on the reflected light intensity (absorption spectrum information) when it is determined that the first resin piece S1 is disposed at a predetermined position.
Subsequently, if the reflected light intensity is less than the predetermined light intensity threshold, it is determined that the second resin piece S2 is not disposed at the predetermined position, and if the reflected light intensity is equal to or greater than the predetermined light intensity threshold, When it is determined that the two resin pieces S2 are arranged at the predetermined position and the reflected light intensity is less than the predetermined light intensity threshold, it is determined that the second resin piece S2 is excluded from the predetermined position, and the second resin piece S2 An absorption spectrum of the second resin piece S2 is created based on the reflected light intensity (absorption spectrum information) when it is determined that is disposed at a predetermined position. In this way, an absorption spectrum of each resin piece Sn is created.

  The second sample measurement unit determines whether or not the resin piece Sn is at a predetermined position based on the light intensity change over time in the second reflected light intensity in the same manner as the first sample measurement unit. Each resin piece Sn is associated with each absorption spectrum information, and control is performed to create an absorption spectrum of each resin piece Sn.

  Whether the resin piece Sn is an ABS resin by determining the presence or absence of a peak derived from the CN functional group in the absorption spectrum of the resin piece Sn created by the first sample measurement unit, for example. Control to determine the resin type of the resin piece Sn is performed so as to determine whether or not. In this determination, the resin type can also be determined by determining the presence or absence of peaks at a plurality of specific wave numbers using an absorption spectrum obtained by the Kramers-Kronig transformation.

  The second resin type discriminating unit performs control for determining the resin type of the resin piece Sn in the absorption spectrum of the resin piece Sn created by the second sample measuring unit, similarly to the first resin type discriminating unit.

The evaluation unit performs control to evaluate the uniformity of the composition of the resin piece Sn based on the type of resin determined by the first resin type determination unit and the type of resin determined by the second resin type determination unit.
The function of the evaluation unit will be specifically described. In the n-th resin piece Sn, when the resin type determined by the first resin type determination unit matches the resin type determined by the second resin type determination unit. The composition of the nth resin piece Sn is determined to be the type of the resin. On the other hand, when the type of resin determined by the first resin type determination unit and the type of resin determined by the second resin type determination unit do not match, the composition of the nth resin piece Sn is determined to be a mixture, Not recyclable.

  As described above, according to the resin type identification device 1 of the first embodiment, since both the upper surface and the lower surface of the resin piece Sn are measured, the resin piece Sn can be accurately sorted, and the resin piece Accurate measurement can be performed regardless of the shape and dimensions of Sn. Furthermore, since the difference in reflected light intensity between when the resin piece Sn is present at the predetermined position and when it does not exist is clearly shown, without providing a laser sensor or the like for detecting the arrangement of the resin piece Sn at the predetermined position, The controller 50 can distinguish between the reflected light intensity from the first resin piece S1 and the reflected light intensity from the second resin piece S2.

<Second embodiment>
FIG. 4 is a side view showing the configuration of the resin type identification device according to the second embodiment of the present invention. In addition, about the thing similar to the resin kind identification apparatus 1 and 100 mentioned previously, description is abbreviate | omitted by attaching | subjecting the same code | symbol.
The resin type identification device 101 includes a first infrared spectrophotometer 104 having a first infrared light source unit that emits infrared light and a first infrared light detection unit, and a second infrared that emits infrared light. A second infrared spectrophotometer 105 having a light source unit and a second infrared light detection unit, a control unit 50 (not shown), a sample arrangement unit 30 on which a resin piece Sn is arranged, and a first reflection measurement A probe 102 and a second reflection measurement probe 103 are provided.

  The first reflection measurement probe 102 includes a cylindrical casing 102a and an optical fiber 102b that connects the casing 102a and the first infrared spectrophotometer 104, and a lens or the like is provided inside the casing 102a. Has been placed. When the resin piece Sn is arranged at a predetermined position, the light emitted from the first reflection measurement probe 102 passes through the gap P1 between the upper conveyance belt 31 and the upper conveyance belt 32, and the resin piece. The light irradiated to the first measurement point C1 on the upper surface of Sn and reflected at the first measurement point C1 on the upper surface of the resin piece Sn again passes through the gap P1 between the upper conveyance belt 31 and the upper conveyance belt 32, and The light is incident on the one-reflection measuring probe 102.

  The second reflection measurement probe 103 includes a cylindrical casing 103a and an optical fiber 103b that connects the casing 103a and the second infrared spectrophotometer 105, and a lens or the like is provided inside the casing 103a. Has been placed. When the resin piece Sn is disposed at a predetermined position, the light emitted from the second reflection measurement probe 103 passes through the gap P2 between the lower conveyance belt 33 and the lower conveyance belt 34. The light irradiated to the second measurement point C2 on the lower surface of the resin piece Sn and reflected at the second measurement point C2 on the lower surface of the resin piece Sn passes again through the gap P2 between the lower conveyance belt 33 and the lower conveyance belt 34. Then, the light enters the second reflection measurement probe 103.

  As described above, according to the resin type identification device 101 of the second embodiment, since both the upper surface and the lower surface of the resin piece Sn are measured, the resin piece Sn can be accurately sorted, and the resin piece Accurate measurement can be performed regardless of the shape and dimensions of Sn.

<Other embodiments>
(1) In the above-described resin type identification device 1, the sample placement unit 30 is configured to include the upper and lower transport belts 31 to 34. Instead, the upper and lower sides formed of a material that transmits infrared rays. It is good also as a structure provided with the conveyance belt of 1 each. In other words, the sample placement portion in the present invention can irradiate infrared light on the upper and lower surfaces of the sample and detect the light intensity information of the infrared light reflected from the upper and lower surfaces of the sample. Good.

(2) In the above-described resin type identification device 1, the sample placement unit 30 is configured to include the rubber roller unit 60. Instead, the sample placement unit 30 includes a heating device that heats the resin piece Sn to a deformable temperature. Also good.

  The present invention can be suitably used for a resin type identification device or the like.

DESCRIPTION OF SYMBOLS 1 Resin type identification apparatus 10 1st infrared light source part 20 1st infrared light detection part 50 Control part 110 2nd infrared light source part 120 2nd infrared light detection part

Claims (5)

A first infrared light source unit that irradiates infrared light onto the upper surface of a sample made of resin, and a first infrared light detection unit that detects first light intensity information of infrared light reflected from the upper surface of the sample. An infrared spectrophotometer,
A second infrared light source comprising a second infrared light source unit that irradiates the sample lower surface with infrared light, and a second infrared light detection unit that detects second light intensity information of the infrared light reflected by the sample lower surface. With a spectrophotometer ,
The first infrared light detection unit of the first infrared spectrophotometer and the second infrared light detection unit of the second infrared spectrophotometer are arranged across the sample,
A resin type identification device comprising: a control unit that evaluates the uniformity of the composition of the sample based on the first light intensity information and the second light intensity information. The first infrared light source unit has a condensing mirror, irradiates infrared light from the condensing mirror to the first measurement point on the upper surface of the sample,
The first infrared light detection unit has a condensing mirror and obtains the first reflected light intensity by condensing the infrared light reflected at the first measurement point on the upper surface of the sample to the detector,
The second infrared light source unit has a condensing mirror, irradiates infrared light from the condensing mirror to the second measurement point on the lower surface of the sample,
The second infrared light detection unit has a condensing mirror, and collects infrared light reflected at a second measurement point on the lower surface of the sample to a detector to obtain a second reflected light intensity. The resin type identification device according to claim 1. Provided with a sample mounting plate that can move in a predetermined direction,
3. The resin type identification device according to claim 1, wherein the sample is placed at a predetermined position irradiated with infrared light by moving the sample mounting plate. 4.   The resin type identification device according to claim 3, further comprising a shaping unit that shapes an upper surface and / or a lower surface of the sample before the sample is arranged at a predetermined position. After the upper surface and / or the lower surface of the sample is shaped, the sample passes through a passage provided with a wall surface having a predetermined interval in the vertical direction,
The resin type identification device according to claim 4, wherein a predetermined position is set in the passage.

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