JP4019740B2 - Plastic product and reusable plastic production apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention improves the recyclability of plastic products used in electronic / electric equipment, automobiles, industrial machines, packaging containers, building materials, etc., and is used in electronic / electric equipment, automobiles, industrial machines, packaging containers, building materials, etc. The present invention relates to a method or an apparatus for recycling used and recovered used plastics to produce high-quality reusable plastics.
[0002]
[Prior art]
In recent years, plastic recycling has been actively studied against the background of legal regulations on global environmental protection such as the Home Appliance Recycling Law. Plastic recycling can be classified into three types: material recycling, chemical recycling, and thermal recycling. If the environmental impact of material recycling is reduced to the same plastic again, and the economic cost of collection and separation is small. Is said to be the best recycling method.
Therefore, in order to make it easier to sort the collected plastics by material, the name of the material is displayed on the plastic part.
[0003]
However, the range of physical properties of plastics currently classified according to the material labeling of the collected household electrical appliances is very wide. Similar plastic materials (hereinafter referred to as “recycled plastics”) are obtained by separating and collecting plastic parts according to this classification. In other words, the physical property values vary among the collection / regeneration units (hereinafter referred to as “lots”). In addition, if you try to adjust the physical property values to correct the variation, the cost of recycled plastic will be higher than that of new plastic (hereinafter referred to as “virgin plastic”) due to inspection and adjustment costs, and recycled plastic. There was a problem that the scope of application did not widen.
[0004]
[Problems to be solved by the invention]
As a means for solving such a problem, in OA equipment such as a copying machine, in addition to material display, a product number (hereinafter referred to as “grade name”) given by a material manufacturer as a product name as well as a material display is disclosed. ) Is displayed on plastic parts. Grade names are given to plastics that contain all the components and quantities contained in specific grades, and recycled plastics obtained by sorting and collecting by grade name have very different physical property values between lots. There is an advantage that it becomes smaller.
[0005]
However, because of the nature of grade names, there are an enormous number of materials within each material, and the classification and collection based on this classification is limited to products that have been using specific grades of plastic for large parts for many years. Except for the above, it is very difficult to obtain a recycled plastic that can secure a stable supply amount at a low price from the viewpoint of a large number of fractions and a recovered amount.
[0006]
The present invention has been made to solve the above-described problems, and an object of the present invention is to make it possible to produce a reusable plastic economically and with high quality.
[0007]
[Means for Solving the Problems]
In the reusable plastic production apparatus according to the present invention, the recovered plastics to be classified are displayed with classification symbols relating to workability, rigidity and impact strength, which are physical properties required when used as recycled plastic, The classification symbol is defined by associating values of the physical properties with respect to the recovered plastics to be classified from a plurality of categories obtained by dividing a range of values that the physical properties can take for each physical property. And a classifying unit that takes in the recovered plastic by classifying the classified plastics based on the classification symbol, and a separating unit that separates the classified recovered plastic material from other materials.
[0008]
In addition, for each of the physical properties, a plurality of categories obtained by dividing the range of values that the physical property can take into predetermined ranges are determined in advance to match the classification symbol displayed on the plastic product, and the classification means includes: A plurality of input ports corresponding to the classification symbol is provided, and the collected plastic to be classified is classified by being taken into the input port that matches the classification symbol displayed on the recovered plastic.
[0009]
In the reusable plastic production method according to the present invention, the recovered plastics to be classified have classification symbols for workability, rigidity, and impact strength, which are physical properties required when used as recycled plastics. The classification symbol corresponds to the value of each physical property with respect to the recovered plastic to be classified from a plurality of categories in which the range of values that the physical property can take is divided into predetermined ranges for each physical property. In addition, the method includes a classification step for collecting the collected plastic by classification for each classification based on the classification symbol, and a separation step for separating the classified collected plastic material from other materials.
[0010]
Also, The reusable plastic production method according to the present invention is: For each of the physical properties, a plurality of categories obtained by dividing the range of possible values of the physical properties into predetermined ranges are determined in advance to match the classification symbols displayed on the plastic product, and the classification step includes the classification step The method includes a step of classifying a collected plastic, which has a plurality of input ports corresponding to symbols, into the input port that matches the classification symbol displayed on the recovered plastic.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, before describing the reusable plastic production apparatus according to Embodiment 1 of the present invention with reference to the drawings, classification by material or physical property will be described. In the present embodiment, the classification is performed according to the material and the physical property value, and the physical property value is classified by classifying the workability, rigidity, and impact strength of the material. FIG. 1 is a correspondence table in which physical property values and ranges thereof are classified when the material is polypropylene resin (hereinafter referred to as PP). Melt flow rate (hereinafter referred to as MFR) was used for workability, flexural modulus was used for rigidity, and Izod impact strength was used for impact strength. The range of classification is divided according to the level of physical property values required for use as recycled plastic. With this classification method, PPs with a total of 129 grade names from five main PP manufacturers are classified into 36 types as shown in FIG. If necessary, classification by additives such as flame retardants and reinforcing materials may be added.
[0012]
FIG. 3 is a block diagram showing a reusable plastic production apparatus (recycling plant) in the present embodiment. In FIG. 3, A is a classification machine (classification means) in which the outlets of waste products are divided according to the 36 types of classification shown in FIG. 2 described above, 1 is a metal, seals, urethane foam, etc. classified by the classification machine A A crusher (crushing means) for crushing the composite components with the classified plastic to a predetermined size or less, 2 is a metal attracted to a magnet such as iron or stainless steel from the crushed material crushed by the crusher 1, and these Magnetic separator (first metal selector) 3 for separating and removing plastic containing metal by a magnet 3 is not attracted by magnetic force such as brass or some stainless steel that cannot be separated and removed from the crushed material by the magnetic separator 2 A metal sorter (second metal sorting means) that detects metals and plastics containing these metals with a metal detector and separates and removes the detected metals from the crushed material. .
[0013]
4 is a vibration that rubs the surface of a plastic piece or the like after most of the metal is separated and removed by the metal sorter 3 and separates light-weight foreign matters such as seals attached to the plastic piece, its adhesive, and urethane foam from the plastic. A mill (light-weight foreign matter separating means) 5 is a wind power sorter (light-weight foreign matter sorting means) that sorts the plastic and light-weight foreign matter separated by the vibration mill 4 using wind power. The sorting process by the sorter A and the separation process by the crusher 1, the magnetic sorter 2, the metal sorter 3, the vibration mill 4 and the wind sorter 5 are arranged in the recycling plant so as to form the processing steps in this order. .
[0014]
Next, the operation will be described. A composite component in which metal parts and the like are formed of plastic is put into a predetermined slot of the sorting machine A according to the 36 classifications described above. It is broken down to a size of about 5 to 8 mm by the crusher 1 and separated into a plastic part and a metal part or a plastic part containing metal while being broken. The crushed material that has left the crusher 1 is sent to the magnetic separator 2. In the magnetic separator 2, a metal such as iron attracted by a magnet of about 6000 gauss or more and a plastic containing such a metal are attracted to the magnet from the crushed material and sorted. This removes the rough metal that is attracted to the magnet. Crushed materials such as plastic pieces that are not attracted to the magnet are sent to the metal sorter 3.
[0015]
The metal detector 3 detects the presence of a metal such as brass or some kind of stainless steel that has not been attracted to the magnet by the magnetic separator 2 and a plastic containing such a metal. The detected metal is selected and removed from the crushed material based on the detected position. This also removes rough metal that cannot be attracted to the magnet. The plastic piece after the rough metal is removed is sent to the vibration mill 4. The vibration mill 4 is used for mechanically rubbing the surface of a plastic piece or the like to make seals made of a material different from plastic, adhesive materials thereof, and anti-vibration and soundproof urethane foams and affixing them. Separated into lightweight foreign materials such as adhesives. The separated plastic and light foreign matter are sent to the wind power sorter 5.
[0016]
Light-weight foreign matter that is a part separated by dust and seals accompanying crushing separated by the vibration mill 4 is separated from the plastic by the wind power sorter 5. By sorting and removing lightweight foreign substances in this way, it is possible to obtain a high-quality reusable plastic raw material with less foreign substances and suppressing variations in physical properties.
[0017]
FIG. 4 is a conceptual diagram showing the state of the classifier A used in the present embodiment. The classifier A is divided into the classifications shown in FIG. 2, and the inlet A1 is opened. A classification display A2 indicating that the classification of the inlet is one of the classifications in FIG. 2 is input above the inlet A1. It is displayed so that it can be understood by the operator. A3 is a belt conveyor that transfers composite components such as waste home appliances that are thrown into a loading hole A5 that is located in front of the loading port A1 from a loading table A4 that is positioned on the side of the loading port A1. The insertion hole A5 opens to the front side of the belt conveyor A3, and also serves as a maintenance work space during maintenance of the belt conveyor A3. In FIG. 4, the insertion base A <b> 4 is shown in a perspective perspective view with a broken line so that the belt conveyor A <b> 3 and the like can be seen.
[0018]
Next, the operation will be described. Composite components consisting of waste home appliances such as TVs, air conditioners, refrigerators, washing machines, and personal computers are classified by workers according to the classification shown in FIG. It is dropped from the base A4 onto the belt conveyor A3 in the charging hole A5. The dropped composite component is transferred into the insertion port A1 by the belt conveyor A3, and further, the subsequent steps proceed to the crusher 1 separated for each classification.
[0019]
FIG. 5 is a conceptual diagram showing a state of the crusher 1 used in the present embodiment. In FIG. 4, reference numeral 11 denotes a cylindrical rotary drum having a horizontal axial direction, and a rotary blade 111 is provided on the peripheral surface. A pusher 12 presses the composite component 190 against the rotary drum 11 and moves in the horizontal direction as indicated by an arrow 121. Reference numeral 191 denotes a crushed material crushed by a crusher. The crusher 1 crushes the composite component 190 to a crushed material 191 of about 5 to 8 mm.
[0020]
Next, the operation will be described. The composite component 190, which is classified by the classifier A for each predetermined class and transferred by the belt conveyor A3, is put into the crusher 1. The composite component 190 is pressed against the rotating drum 11 by the pusher 12 moving in the horizontal direction 121 and is crushed by the rotary blade 111 provided on the peripheral surface of the rotating drum 11 until the crushed material 191 has a predetermined size. By setting the crusher 1 to such a configuration, even if a metal component that is more robust than plastic is assembled in the composite component 190, damage to the crusher can be reduced, and the time spent for crushing can also be reduced. In addition, the foreign matter adhered to the plastic surface such as urethane can be scraped off by the rotary blade 111. The reason why the crushed material 191 is about 8 mm or less is to make the size easy to sort at the subsequent stage of magnetic sorting, wind sorting, or electrostatic sorting. The reason for making it about 5 mm or more is plastic of 1 mm or less. This is because it becomes powdery and difficult to handle at the time of reuse, so that generation of powdery plastic is suppressed.
[0021]
FIG. 6 is a conceptual diagram showing the state of the magnetic separator 2. In FIG. 6, 20 is a casing of the magnetic separator 2, 21 is a cylindrical rotating drum shell whose axial direction is horizontal, and 22 is a semicircular permanent magnet fixed to a fixed shaft in the rotating drum shell 21. The semicircular surface has a curved surface shape along the semicircular surface that is the downward rotation direction of the rotary drum 21. A divider 23 is provided below the rotary drum shell 21 at a predetermined interval. One end of the permanent magnet 22 reaches substantially the lowest part of the rotating drum 21, and the divider 23 is located slightly upstream in the rotational direction from this end.
[0022]
Next, the operation will be described. The crushed material 290 discharged from the crusher 1 is sequentially input from an input portion formed in the upper part of the casing 20 of the magnetic separator 2. This crushed material 290 includes a mixed material 292 such as a metal that has a property of sticking to a magnet typified by iron or stainless steel, and a non-magnetic material 291 such as a metal or plastic that does not stick to a magnet typified by aluminum or the like. is doing. The crushed material 290 thrown into the housing 20 falls directly above the rotating drum shell 22 and moves along the rotating drum peripheral surface. As it moves along the peripheral surface, the crushed material 290 is separated from the rotating drum shell 22 and begins to fall due to the action of gravity and centrifugal force.
[0023]
At this time, the non-magnetized material 291 is detached and dropped without being affected by the permanent magnet 22, but the magnetic material 292 is attached to the rotating drum shell 21 by the permanent magnet 22, and the lowermost peripheral surface of the rotating drum shell 21 is left as it is. Move up. The magnetic deposit 292 moves over the divider 23 by moving to the lowest position. Since the magnetic deposit 292 passes through the end of the permanent magnet 22 immediately after passing through the divider 23, it falls off the rotating drum shell 21 due to gravity. In this way, the non-magnetic material 291 such as plastic and the magnetic material 292 such as iron are separated. In the present embodiment, the size of the permanent magnet 22 is set so that the magnetic force on the surface of the rotary drum shell 21 is about 6000 Gauss or more so that stainless steel having weak magnetism can be separated as a magnetic deposit. The magnet may be an electromagnet instead of a permanent magnet.
[0024]
FIG. 7 is a conceptual diagram showing the state of the metal sorter 3. In FIG. 7, reference numeral 31 denotes a crushing piece conveyor (moving means) that conveys crushing pieces after the metal attached to the magnet is removed by the magnetic separator 2, and 32 is a path with an actuator provided near the end of the crushing piece conveyor. In the switching damper (removal means), the solid line state indicates the position at the time of metal detection, and the state 32b indicated by the broken line indicates the normal position at which no metal is detected.
[0025]
33 is a coil installed near the starting end of the shredder conveyor, 34 is a voltage curve attenuation pattern difference due to a pulse applied voltage generated in the coil 33 by the movement of the metal-containing piece 290 conveyed by the shredder conveyor 31 A signal detection calculation unit (metal detection means) 35 for calculating the position of the metal-containing piece 290 on the crushing piece conveyor 31 is an actuator drive electronic circuit for instructing to switch the position of the path switching damper 32.
[0026]
Next, the operation will be described. The crushed pieces from which the metal sticking to the magnet is removed from the magnetic separator 2 are mainly composed of a metal-containing piece 290 containing a metal that does not stick to the magnet, such as aluminum or some stainless steel, and a plastic piece 291. Such crushed pieces are sent to the metal sorter 3 and move on the crushed piece conveyor 31 in the metal sorter 3.
[0027]
As shown in FIG. 8, the metal-containing piece 290 in the crushed material on the crushed material conveyor 31 is different from the voltage curve attenuation pattern of the pulse application voltage 340 that varies depending on the presence of the metal-containing piece 290 in the vicinity of the coil 33. Detects the presence of the metal-containing piece 290, and on the basis of the detection result, the actuator drive electronic circuit 35 is operated after an appropriate delay time corresponding to the speed of the crushed object conveyor 31 (that is, the metal-containing piece 290 is Control is performed so that the path switching damper 32 with the actuator is moved to the broken line position 32b at the time of metal detection at the timing of the end. As a result, the metal-containing piece 290 moves in the discharge direction 292 of the crushed material containing metal and is removed.
[0028]
When the metal-containing piece 290 is not detected, the actuator drive electronic circuit 35 performs control so as to maintain the path switching damper 32 with the actuator at the solid line position. As a result, the plastic piece 291 moves in the discharge direction 293 of the crushed material not containing metal, and is conveyed to the vibration mill 4. In this manner, the metal detector 290 can be used to selectively remove the metal-containing pieces 290 in the crushed material. Further, when the path switching damper 32 is set to the position 32b, a part of the plastic piece 291 may move in the discharge direction 292 of the crushed material containing metal, and may be removed. However, since the metal adhering to the magnet is removed using the magnetic separator 2 in advance, it is not necessary to sort out all the metal with the metal separator 3, and the path switching damper 32 is located at the position 32b. Therefore, the reusable plastic piece can be sent to the vibration mill 4 at a high rate.
[0029]
FIG. 9 is a conceptual diagram showing the state of the rubbing device (lightweight foreign matter separating means). In FIG. 9, 451 is an impeller (radiating means) for radiating the grit 461 in the scraping device, 452 is a pulley for rotating the perforated belt 453 in a predetermined direction, 454 is a plastic piece 470 from which metal is removed, etc. A vent pulley that dents the perforated belt 453 to store the crushed pieces, 455 is a grit collecting tray installed below the vent pulley 454, 463 is dropped from the hole of the perforating belt 453, and the grit collecting plate 455 is dropped. Recovery grit recovered in
[0030]
Next, the operation will be described. In the above-described rubbing apparatus, the grit 461 is radiated from the impeller-451 that rotates at high speed, and is made to collide at high speed with the surface of the plastic piece 470 on the perforated belt 453, thereby peeling off the plastic surface seal or soundproof urethane. Let The plastic pieces 470 collide with each other also by the movement of the perforated belt 453. In this manner, the seal adhered to the surface of the plastic piece, the soundproof urethane, or the like can be peeled off.
[0031]
The radiated grit 461 scrapes the surface of the plastic piece 470, peels off the seal, urethane, etc., then passes through the hole of the perforated belt 453 moved by the pulley 452 or the vent pulley 454 and falls onto the grit collection tray 455. It is collected and returned to the impeller 451 again for use. The plastic piece 470 is agitated by the movement of the perforated belt 453 so that the surface irradiated with the grit is not biased. After such a separation step, the plastic piece 470 is conveyed to the wind power sorter 5 together with the peeled seal, soundproof urethane, and the like. In this way, lightweight foreign matters such as seals and soundproofing urethane can be reliably separated from the plastic piece.
[0032]
FIG. 10 is a conceptual diagram showing the state of the vibration mill 4. In FIG. 10, reference numeral 40 denotes an outer shell of the rubbing device, which incorporates a cylindrical iron rod 41 having a groove 411 formed by knurling on the peripheral surface as shown in FIGS. 42 is an inlet for a plastic piece 401 opened at one end of the outer shell 40, 43 is an outlet for the plastic piece 401 opened at the other end of the outer shell 40, and 44 is a drive shaft connected to the outer shell 40 via a universal joint 45. An eccentric motor 46 is a support spring that supports the outer shell 40.
[0033]
Next, the operation will be described. The crushed material mainly consisting of plastic pieces 401 discharged from the metal sorter 3 with the metal removed is put into the outer shell 40 from the inlet 42. The rotational driving force of the motor 44 eccentrically rotates the outer shell 40 by the eccentric drive shaft and the universal joint 45. Due to this eccentric rotation, the iron rod 41 and the plastic piece 401 in the outer shell 40 supported by the support spring 46 give high-speed vibration. By placing the inlet 42 of the plastic piece 401 at one end of the outer shell 40 and the outlet 43 of the plastic piece 401 at the other end, the plastic piece 401 fed from the inlet 42 is vibrated at high speed with the outer shell 40 and the rod. While moving along the angle of repose within the gap 41, the foreign matter such as the seal and soundproof urethane adhered to the surface of the plastic piece 401 is scraped off strongly between the rods 41.
[0034]
Such a vibration mill 4 can impact and scrape the plastic surface with relatively large energy, so that it is possible to remove foreign matters such as a seal, an adhesive, and a part of the surface deterioration layer in the plastic piece. In addition, in the said embodiment, although the rod 41 by which the groove | channel 411 by the knurling process was formed in the surrounding surface was used, it is good also as the rod 41 in which the uneven surface of the peripheral surface 412 was formed, for example like FIG. Similar effects can be obtained. Further, the rod 41 may be spherical instead of cylindrical.
[0035]
FIG. 14 is a conceptual diagram showing the state of the wind power sorter 5. In FIG. 14, 50 is a casing of the wind power sorter 5, 51 is opened on the top surface of the casing 50, and seals and urethane foam that have been peeled off in the previous separation step, as well as lightweight foreign matters 502 such as dust during crushing. An inlet 52 for the plastic piece 501 to be included and 52 is an outlet for opening the bottom surface of the casing 50 and discharging the plastic piece 503 after separation of foreign matter.
[0036]
53 is an air inlet formed in the middle and lower part of the casing 50, and 54 is a foreign substance inlet formed in the upper part of the casing 50. These ports are arranged in a staggered manner in the vertical direction. 55 is arranged so as to incline downward from between the inlet 51 and the middle wind inlet 53 to between the lower wind inlet 53 and the foreign matter inlet 54, and the second is the lower wind inlet 53 and the foreign matter suction. A perforated slope arranged so as to incline downward from between the opening 54 and the discharge opening 52 forms a plastic piece conveyance path from the input opening 51 to the discharge opening 52. Reference numeral 510 denotes the flow direction of the selected wind from each wind inlet 53 to the foreign matter inlet 54.
[0037]
Next, the operation will be described. The wind power sorter 5 separates the lightweight foreign matter 502 from the plastic piece 501 including the lightweight foreign matter 502 such as a seal, a urethane piece, and dust separated by the rubbing means shown in FIGS. The peeled seal and the plastic piece 501 including the lightweight foreign matter 502 such as a urethane piece and dust, which are input from the input port 51, move while sliding on the first perforated slope 55. At this time, the separated air 510 supplied from the central wind inlet 53 blows off a lightly separated foreign object 502 such as a peeled seal or urethane piece or dust having a small weight per projected area, and is discharged from the foreign material inlet 54 together with the selected air 510. Is done. Similarly, the plastic piece 501 moves while sliding on the second perforated slope 55, and a peeled seal or urethane piece whose weight per projected area is small by the sorting air 510 supplied from the lower wind inlet 53. Light foreign matter 502 such as dust is blown up and discharged from the foreign matter suction port 54 together with the sorting wind 510.
[0038]
The example of FIG. 14 is an example in which the perforated slope 55 is configured in two stages, and the plastic is dropped when the plastic piece 501 moves from the first perforated slope to the second perforated slope. The pieces are agitated, and the light foreign matter 502 that has come out on the surface can be removed by the second slope, and the removal accuracy of the light weight foreign matter 502 is improved. The plastic piece 503 after the foreign matter separation is arranged according to the size and weight of the lightweight foreign matter 502 and the size and weight of the plastic piece 503. It can be adjusted. Through the above steps, reusable plastic is extracted and produced.
[0039]
Embodiment 2. FIG.
FIG. 15 is a perspective view showing an indoor unit of a separate type air conditioner in the present embodiment. In FIG. 15, C is an air conditioner main body attached to a wall or the like, C21 is hooked and fixed to a mounting plate (not shown) fixed to the wall surface, and is a main body casing made of plastic. C22 is a plastic covering the front surface of the main body casing C21. A panel made of C25 is a pipe connected to an outdoor unit (not shown) through a wall hole C26, and B is a display unit engraved and displayed on the lower surface of the main body casing C21. In the air conditioner main body C, plastic parts are made of a plastic material having the same classification in FIG. The air conditioner main body C includes plastic parts and parts of different materials such as a metal heat exchanger.
[0040]
FIG. 16 is an enlarged view of the display section B shown in FIG. In FIG. 16, the display part B has a material symbol B1 for plastic parts, a symbol B2 indicating the type of additive for plastic parts, a symbol B3 indicating the amount of the additive, and a classification symbol such as a physical property value classified by FIG. B4 is displayed. Thus, in plastic products such as household electrical appliances intended to be subjected to recycling processing in a recycling plant, a display such as a display portion B is displayed on a plastic part to be collected. The material symbol B1 is in accordance with JIS K6899, and the classification symbols such as the physical property values are the same as those in the first embodiment and FIGS.
[0041]
Therefore, after such plastic products become waste home appliances, the reusable plastic can be easily extracted and produced through the reusable plastic production apparatus (recycling plant) in the first embodiment. That is, in the sorting machine A of the first embodiment, based on the classification symbol B4 displayed on the display unit B of the air conditioner main body C, the loading table A4 corresponding to the loading opening A1 of the classification display A2 that matches this B4. If it is inserted into the belt conveyor A3 in the insertion hole A5, the reusable plastic is extracted and produced along the separation process of the first embodiment. According to the display based on this classification, plastic parts from waste home appliances can be easily separated and collected, and the amount collected for each classification can be easily secured as compared with the case of sorting and collecting by grade name. Moreover, since the kind and amount of additives such as flame retardants and reinforcing materials are displayed as necessary, it is possible to consider the additives during the recycling process.
[0042]
【The invention's effect】
As described above, according to the present invention, the recovered plastics to be classified are each displayed with a classification symbol regarding workability, rigidity, and impact strength, which are physical properties required when used as recycled plastic, The classification symbol is determined by associating the values of the physical properties with respect to the recovered plastics to be classified from a plurality of categories obtained by dividing the range of possible values of the physical properties for each of the physical properties. And a classification means for taking in the recovered plastic by classifying the classified plastic based on the classification symbol and a separating means for separating the classified recovered plastic material from other materials. Variations in physical properties of the collected plastic can be suppressed.
[0043]
In addition, the recovered plastics to be classified are displayed with classification symbols regarding the workability, rigidity, and impact strength, which are physical properties required for use as recycled plastics, and the classification symbols are displayed for each physical property. From a plurality of categories obtained by dividing a range of possible values of the physical properties into predetermined ranges, the physical property values for the recovered plastics to be classified are determined in association with each other, and based on the classification symbol, Since there is a classification process for collecting recovered plastic by classification and a separation process for separating the classified recovered plastic material from other materials, there is no variation in the physical properties of recovered plastic during the production of reusable plastic. Can be suppressed.
[0044]
Further, the classification is determined in advance to match the classification display displayed on the plastic product, and the classification means captures the collected plastic classified by comparing the classification display displayed on the plastic product with the classification, The collected plastics can be easily classified.
[Brief description of the drawings]
FIG. 1 is a correspondence table in which physical property values and ranges thereof are classified in the case where a material is a polypropylene resin (hereinafter referred to as PP).
FIG. 2 is a classification table when the material is an example of a polypropylene resin (hereinafter referred to as PP).
FIG. 3 is a block diagram showing a reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 4 is a conceptual diagram showing a classification device for a reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 5 is a conceptual diagram showing a single-screw pressing crusher of a reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 6 is a conceptual diagram showing a drum type magnetic separator of the reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 7 is a conceptual diagram showing a metal sorter of a reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 8 is a conceptual diagram showing a metal sorter of a reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 9 is a conceptual diagram showing a surface rubbing device by irradiation with a hard sand-like material in the reusable plastic production device according to Embodiment 1 of the present invention.
FIG. 10 is a conceptual diagram showing a rod mill type surface rubbing apparatus of the reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 11 is a conceptual diagram showing a surface state of a rod in a rod mill of the reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 12 is a conceptual diagram showing a surface state of a rod in a rod mill of the reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 13 is a conceptual diagram showing a surface state of a rod in a rod mill of the reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 14 is a conceptual diagram showing a wind power sorter of a reusable plastic production apparatus according to Embodiment 1 of the present invention.
FIG. 15 is a perspective view showing an air conditioner body according to Embodiment 2 of the present invention.
FIG. 16 is an enlarged view showing a display unit according to the second embodiment of the present invention.

Claims (4)

  Recovered plastics to be classified are displayed with classification symbols for workability, rigidity, and impact strength, which are physical properties required for use as recycled plastic, and the classification symbols are for each physical property. From a plurality of categories obtained by dividing a range of possible values for each predetermined range, each physical property value for the recovered plastic to be classified is determined in association with each other, and for each classification based on the classification symbol A reusable plastic production apparatus comprising classification means for sorting and collecting collected plastic, and separation means for separating the sorted collected plastic material from other materials.   For each of the physical properties, a plurality of categories obtained by dividing the range of possible values of the physical properties into predetermined ranges are determined in advance to match the classification symbols displayed on the plastic product, and the classification means includes the classification A plurality of input ports corresponding to symbols are provided, and the collected plastics to be classified are classified by being taken into the input ports that match the classification symbols displayed on the recovered plastics. The reusable plastic production apparatus according to 1. Recovered plastics to be classified are displayed with classification symbols for workability, rigidity, and impact strength, which are physical properties required for use as recycled plastic, and the classification symbols are displayed for each physical property. From a plurality of categories obtained by dividing a range of possible values of physical properties for each predetermined range, each physical property value for the collected plastic to be classified is determined in association with each other, and for each classification based on the classification symbol A method for producing a reusable plastic, comprising: a classification step for classifying the recovered plastic material into a classified material and a separation step for separating the classified recovered plastic material from another material. For each of the physical properties, a plurality of categories obtained by dividing the range of possible values of the physical properties into predetermined ranges are determined in advance so as to coincide with the classification symbol displayed on the plastic product, and the classification step includes the classification step A plurality of input ports corresponding to symbols, and including a step of classifying the collected plastics to be classified by taking them into the input ports that match the classification symbols displayed on the recovered plastics. A reusable plastic production method according to claim 3.

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