Method and apparatus for separating and recovering metal and resin from metal-coated resin materials

Abstract

To decrease the adsorption rate of a metal film-bearing resin powder in a pulverized mixed powder and to separate this metal film-bearing resin powder from the metal film powder or the resin powder.SOLUTION: A metal film-bearing resin material p having a bonded metal film is pulverized to form a mixed powder m comprising a metal film powder a, a metal film-bearing resin powder b, and a resin powder c. The resin powder c is subjected to slide down first while the mixed powder m is transported with a slantingly arranged belt 9 and is then separated to the resin powder c and the metal film-bearing resin powder b, and the metal film powder a by using magnetic force. Further, the resin powder c is subjected to slide down first while the separated resin powder c and metal film-bearing resin powder b are transported by the slantingly arranged belt 9, then the resin powder c with low metal content is separated and recovered by using magnetic force.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a recycling technology for mixtures of metal and synthetic resin materials, such as resin-plated parts, and more particularly to a method for separating and recovering metal and resin materials from metal-coated resin materials, which allows the metal raw material and resin raw material to be separated and recovered from resin-plated parts and reused as metal raw material or resin raw material, respectively, and an apparatus for separating and recovering the metal and resin. [Background technology]

[0002] For automobile door handles, radiator grilles, etc., metal-plated or vapor-deposited resin-plated products have been proposed as alternative materials to various conventional metal parts in order to reduce weight, etc. On the other hand, in response to environmental issues, recycling technology has also been implemented to separate these metal-plated resin-plated parts into the metal raw material and the resin raw material and reuse them.

[0003] Techniques for separating resin-plated parts into raw metal and resin materials have been proposed. For example, Patent Document 1, JP 2002-28927 A, entitled "Method for recovering resin granules and resin granules," proposes a method for recovering resin granules by crushing a resin material treated with metal using a crushing device consisting of fixed blades and rotary blades, and separating the crushed granules into metal and resin parts using a magnetic separator.

[0004] The magnetic separator 101 used in this recovery method is equipped with a hanging-type strong magnet 102, as shown in Figure 19. The mixed granular material of metal-coated, resin granular material, and metal-coated resin granular material crushed by the crusher is transported to a cushion tank 103, and the mixed granular material is dropped onto a first conveyor 105 through a rotary valve 104 attached to the bottom end of the cushion tank 103. A second conveyor 106 is further positioned one level below. The strong magnet 102 of the magnetic separator 101 is positioned so as to move between the first and second conveyors 105, 106.

[0005] The powerful magnet 102 of the magnetic separator 101 attracts only the metal coating from the mixed powder being transported on the first conveyor 105 and transports it to a metal raw material recovery tank 107. On the other hand, the mixed granular material from which the metal coating has been separated and which is mostly made of resin granules is dropped by a second conveyor 106 and collected in a resin raw material recovery tank 108.

[0006] Furthermore, Patent Document 2, JP 2002-336732 A, "Magnetic Separator," proposes a technology in which endless belts are arranged at predetermined intervals in the vertical direction and magnetic materials (metal coatings) are attracted from crushed mixed granular material by permanent magnets. This magnetic separator has a technical feature in that it prevents magnetic materials (metal coatings) that have been attracted once from being attracted again to the endless belt. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-28927 [Patent Document 2] Japanese Patent Application Laid-Open No. 2002-336732 Summary of the Invention [Problem to be solved by the invention]

[0008] The size of the mixture of metal and synthetic resin materials, such as resin-plated parts, is not always the same. Small crushed resin particles are transported to the resin raw material recovery tank 108 by the second conveyor 106 without being attracted to the magnet 102. Furthermore, if there are large resin particles in the pile of crushed mixture, crushed metal coating material may be attracted and transported at the same time as the large resin particles, and the crushed resin material may be mixed into the metal raw material recovery tank. This poses the problem of low separation efficiency.

[0009] Conversely, if there are large crushed metal-coated particles, resin granules may be adsorbed and transported together with these large crushed metal-coated particles, and the metal coating may be mixed into the resin raw material recovery tank. If there is a large difference in the size (outer diameter) of the crushed particles, there is a problem that separation efficiency tends to be low.

[0010] The inventors of the present invention focused on the "angle of repose," which relates to the physical properties of piled soil or powder. The "angle of repose" is one of the physical properties used as an index of the fluidity of powders, etc. It is the angle between the horizontal plane and the slope of a naturally formed mountain that does not collapse when powder is gently piled on a horizontal surface. The inventors of the present invention thought that by tilting the belt conveyor and making it exceed the angle of repose, resin granules that are not attracted by the magnet during transport will actively fall and separate, thereby improving separation processing capacity.

[0011] The present invention has been devised to solve these problems. That is, an object of the present invention is to provide a metal recovery method and a metal coating recovery apparatus for metal-coated resin materials, which adsorb and separate metal-coated resin powder from a pulverized mixed powder in several stages, and reliably separate the metal-coated resin powder from the metal-coated powder or resin powder, thereby enabling high-purity metal raw material and resin raw material to be recycled. [Means for solving the problem]

[0012] The drop-type method of the present invention includes crushing a metal-coated resin material (p) having a metal coating attached thereto to produce a mixed powder (m) of the metal-coated powder (a), the metal-coated resin powder (b), and the resin powder (c); While conveying the mixed powder (m) on an inclined belt (9), the resin powder (c) slides off first, and then the mixed powder (m) is separated into the resin powder (c) and the metal-coated resin powder (b) and the metal-coated powder (a) using a magnetic force. Furthermore, while these separated resin powder (c) and metal-coated resin powder (b) are conveyed by an inclined belt (9), the resin powder (c) is slid down first, and the resin powder with a low metal content ( c’ ) is separated and recovered.

[0013] In addition, the dropping method of the present invention is a method of mixing the resin powder (c) and the metal-coated resin powder (b ,b’ ) is conveyed by an inclined belt (9), while the resin powder (c) slides off first, and the powder with a low metal content is separated by magnetic force. Metal coated When separating the resin powder (b'), A magnet (10b) having a stronger magnetic force than the magnet (10a) used to separate the mixed powder (m) at first is used. Low metal content Metal coated resin powder ( b’ ) and separate it from the resin powder (c).

[0014] The drop-type device of the present invention is configured to separate the mixed powder (m) of the pulverized metal-coated powder (a), the resin powder (c), and the metal-coated resin powder (b), and includes: a rough sorting belt conveyor (7) having two rollers (8) on which a belt (9) is inclined and stretched, one of which is provided with a magnet (10a); a separator (12) disposed below the destination of the rough sorting belt conveyor (7) for separating the sorted metal-coated powder (a) and metal-coated resin powder (b) from the resin powder (c) and metal-coated resin powder (b); a precision sorting belt conveyor (13) disposed below the separator (12) for further sorting the metal-coated resin powder (b), the precision sorting belt conveyor (13) including two rollers (8) across which a belt (9) is inclined and one of which is provided with a magnet (10b); The present invention is characterized by comprising: 。 The apparatus may further include a vibration device (34) for vibrating the belt (9) of the rough sorting belt conveyor (7). The conveyor may further include an injector (35) for injecting air above the belt (9) of the coarse sorting belt conveyor (7).

[0015] The suction-type method of the present invention includes crushing a metal-coated resin material (p) having a metal coating attached thereto to produce a mixed powder (m) of metal-coated powder (a), resin powder (c), and metal-coated resin powder (b), While the mixed powder (m) is conveyed by an inclined belt (9), the resin powder (c) slides down first, and the metal-coated powder (a) and the metal-coated resin powder (b) are attracted by the magnetic force of a plate-shaped magnet (44), sucked up, separated, and recovered. The magnetic force of the plate-shaped magnet (44) is adjusted to vary the adsorption rate of the metal-coated resin powder (b).

[0016] When separating the metal-coated powder (a) and the metal-coated resin powder (b) from the mixed powder (m), the distance (d) between the mixed powder (m) and the plate-like magnet (44) that adsorbs and sucks up the metal-coated powder (a) and the metal-coated resin powder (b) is widened to reduce the adsorption rate of the metal-coated resin powder (b), thereby separating and recovering only the metal-coated powder (a) with a high metal content. Further, the resin powder (c) and the metal-coated resin powder (b) are extracted from the mixed powder (m). ,b’ When separating the mixed powder (m), the metal-coated powder (a) and the metal-coated resin powder (b) from the plate-like magnet (44), the distance (d) between the mixed powder (m) and the plate-like magnet (44) that adsorbs and sucks up the mixed powder (m), the metal-coated powder (a) and the metal-coated resin powder (b) is narrowed, thereby increasing the adsorption rate of the metal, Resin powder with a metal coating (b') having a low metal content Separate and recover.

[0017] The suction-type device of the present invention comprises a conveying belt conveyor (42) having a belt (9) stretched at an angle between two rollers (8) for conveying a mixed powder (m) of pulverized metal-coated powder (a), resin powder (c), and metal-coated resin powder (b); a metal adsorption belt conveyor (43) arranged above the transfer belt conveyor (42) and having a belt (9) stretched obliquely between two rollers (8); a plate-like magnet (44) provided on the inner surface of the lower belt (9) of the metal adsorption belt conveyor (43) for adsorbing and sucking up the metal-coated powder (a) and the metal-coated resin powder (b); The apparatus is characterized in that the distance (d) between the transport belt conveyor (42) and the metal adsorption belt conveyor (43) can be adjusted.

[0018] The metal adsorption belt conveyor (43) is configured to raise and lower the transfer belt conveyor (42). The metal adsorption belt conveyor (43) is arranged so that its total length in the conveying direction is longer than the total length in the conveying direction of the conveying belt conveyor (42), and is configured to recover the adsorbed metal-coated powder (a) and metal-coated resin powder (b).

[0019] The metal adsorption belt conveyor (43) and the transport belt conveyor (42) are arranged offset in the transport direction, and are configured to recover the adsorbed metal-coated powder (a) and metal-coated resin powder (b). The conveyor may further include an injector (35) for injecting air above the belt (9) of the conveyor belt (42).

[0020] The sorting method of the present invention includes pulverizing a metal-coated resin material (p) having a metal coating attached thereto to produce a mixed powder (m) of metal-coated powder (a), resin powder (c), and metal-coated resin powder (b, b'); The mixed powder (m) is conveyed by vibrating an inclined belt (9), and the resin powder (c) and the metal-coated resin powder (b') with a low metal content are first slid down in the direction opposite to the conveying direction of the belt (9); The metal-coated powder (a) and the metal-coated resin powder (b) with a high metal content are attracted to a plate-shaped magnet (44), transported upward in the same direction as the conveying direction of the belt (9), and then separated and recovered.

[0021] The sorting type device of the present invention comprises a sorting belt conveyor (62) having a magnet (10a) on one of two rollers (8) on which a belt (9) is inclinedly stretched in order to convey a mixed powder (m) of pulverized metal-coated powder (a), resin powder (c), and metal-coated resin powder (b, b'); a plate-shaped magnet (44) provided on the inner surface of the upper belt (9) of the sorting belt conveyor (62) for attracting the metal-coated powder (a) and the metal-coated resin powder (b) and transporting them upward; and a vibration device (46) for vibrating the distribution type belt conveyor (62). [Effects of the Invention]

[0022] In the dropping method of the present invention, the metal-coated resin powder (b) is separated from the pulverized mixed powder (m) by adsorption in several stages, thereby ensuring separation of the metal-coated resin powder (b) from the resin powder (c). Thus, the metal-coated resin material (p) can be recycled into a resin raw material with a low content of the metal-coated powder (a).

[0023] In the drop-type device of the present invention, the metal-coated powder (a) and the metal-coated resin powder (b) are attracted from the mixed powder (m) by the magnets (10a) attached to the rollers (8) of the rough sorting belt conveyor (7). The resin powder (c) not attracted by the rough sorting belt conveyor (7) and the metal-coated resin powder (b) with a low metal content are further separated by the magnets (10b) attached to the rollers (8) of the precision sorting belt conveyor (13), thereby ensuring separation of the metal-coated resin powder (b) from the resin powder (c).

[0024] In particular, by tilting the sorting belt conveyors (32, 33) and placing the mixed powder (m) on the belt (9) at a position exceeding the angle of repose, resin powder (b) and metal-coated resin powder (b) that are not attracted by the magnet (10a) during conveyance are actively dropped and separated first, thereby improving separation processing capacity. In addition, the magnetic separator (21) can adjust the adsorption rate, so that metal-coated resin powder (b) with a different metal content can be accurately separated and recovered from the mixed metal-coated powder (a) or resin powder (c).

[0025] In the suction-type device of the present invention, by widening the gap (d) between the mixed powder (m) and the plate-like magnet (44) and reducing the rate at which the metal-coated resin powder (b) in the mixed powder (m) is attracted to the plate-like magnet (44), the metal-coated resin powder (b) can be reliably separated from the metal-coated powder (a) or the resin powder (c). As a result, the metal raw material can be recycled with a low content of the metal-coated resin powder (b).

[0026] When separating the metal-coated powder (a) and the metal-coated resin powder (b) from the mixed powder (m), the distance (d) between the mixed powder (m) and the plate-like magnet (44) is widened to reduce the adsorption rate of the metal-coated resin powder (b), thereby separating and recovering only the metal-coated powder (a) with a high metal content, thereby ensuring that the metal-coated resin powder (b) is reliably separated from the resin powder (c). As a result, the resin raw material can be recycled to have a low content of the metal-coated resin powder (b).

[0027] When separating the resin powder (c) and the metal-coated resin powder (b) from the mixed powder (m), the distance (d) between the mixed powder (m) and the plate-shaped magnet (44) is narrowed to increase the adsorption rate of the metal-coated resin powder (b), thereby enabling the separation and recovery of the resin powder (c) with a low metal content.

[0028] The suction-type device of the present invention is configured so that the distance between the transport belt conveyor (42) and the metal adsorption belt conveyor (43) can be adjusted, thereby reducing the adsorption rate of metal-coated resin powder and adsorbing only the metal-coated powder from the mixed powder on the transport belt conveyor, thereby reliably separating the metal-coated resin powder from the metal-coated powder or resin powder.

[0029] In particular, by tilting the conveying belt conveyor (42) and placing the mixed powder (m) on the belt (9) at a position exceeding the angle of repose, the resin powder (c) and the metal-coated resin powder (b) that are not attracted by the plate-shaped magnet (44) during conveyance are more actively allowed to fall and separate, thereby increasing the separation processing capacity.

[0030] In the sorting-type separation process of the present invention, a vibrating mixed powder (m) is placed on the inclined belt (9) of the sorting-type belt conveyor (62). Of the vibrating mixed powder (m) on the belt (9), the resin powder (c) with a low specific gravity and the metal-coated resin powder (b') with a low metal content rise to the top of the vibrating belt (9). The floating resin powder (b) is not attracted to the plate-shaped magnet (44), and since the inclined belt (9) exceeds its angle of repose, it simply slides down the belt (9). On the other hand, the metal-coated powder (a) with a high specific gravity and the metal-coated resin powder (b) with a high metal content sink to the bottom on the belt (9) due to the magnetic force of the plate-shaped magnet (44), and are carried by the belt (9) to the upper magnet (45(8)), where they are separated into metal and resin components. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a schematic diagram illustrating an apparatus for separating and recovering metal and resin materials from a metal-coated resin material according to the present invention. [Figure 2] The figures show the state of crushed metal-coated resin material, where (a) shows the state where the metal-coated powder and resin powder are attached, (b) shows the state where the metal-coated powder and resin powder are separated, (c) shows the resin powder with a metal coating, and (d) shows the resin powder with a metal coating with only a small amount of metal coating attached. [Figure 3] FIG. 1 is a schematic explanatory diagram showing a horizontally arranged separation and recovery device of a metal dropping type in which the belt conveyor of Example 1 is arranged horizontally. [Figure 4] FIG. 1 is a schematic explanatory diagram showing a horizontally arranged separation and recovery apparatus of a metal drop type according to a first embodiment, which is an embodiment of a horizontally arranged separation and recovery apparatus equipped with a precision sorting belt conveyor and a magnetic separator. [Figure 5] FIG. 1 is a schematic explanatory view showing a horizontally arranged metal dropping type separation and recovery device according to Example 1, which is yet another embodiment. [Figure 6] FIG. 10 is a schematic explanatory diagram showing a metal-drop type inclined separation and recovery device in which the belt conveyor of the second embodiment is arranged at an inclination. [Figure 7]10A and 10B are schematic explanatory views showing a first modification of the inclined separation and recovery device of the second embodiment, in which (a) shows the device when it is arranged at a steep gradient, and (b) shows the device when it is arranged at a gentle gradient. [Figure 8] FIG. 10 is a schematic explanatory view showing a second modification of the inclined separation and recovery device of the second embodiment. [Figure 9] FIG. 10 is a schematic explanatory view showing a third modification of the inclined separation and recovery device of the second embodiment. [Figure 10] FIG. 10 is a schematic explanatory diagram of a horizontally arranged metal adsorption-type separation and recovery device in which the belt conveyor of Example 3 is arranged horizontally. [Figure 11] FIG. 10 is a schematic explanatory diagram showing a horizontally disposed metal adsorption-type separation and recovery device according to a third embodiment. [Figure 12] FIG. 10 is a schematic explanatory diagram showing another embodiment of the horizontally arranged metal adsorption separation and recovery device of Example 3. [Figure 13] FIG. 10 is a schematic explanatory diagram showing an inclined metal adsorption separation and recovery apparatus in which the belt conveyor of Example 4 is inclined. [Figure 14] FIG. 10 is a schematic explanatory view showing a first modification of the inclined separation and recovery device of the fourth embodiment. [Figure 15] 10A and 10B are schematic explanatory views showing a second modification of the inclined separation and recovery device of the fourth embodiment, in which (a) shows the device being arranged at a steep gradient, and (b) shows the device being arranged at a gentle gradient. [Figure 16] This is a schematic explanatory diagram showing a sorting-type separation and recovery device in which a belt conveyor is arranged at an angle and vibrated to separate metal and resin components according to Example 5. Note that the same reference numerals are used for the same members as in Examples 1, 2, 3, and 4, and their explanations will be omitted. [Figure 17] This is a schematic diagram showing variant 1 of the inclined separation and recovery device of Example 5, in which two separation belt conveyors are arranged for separation processing when there is a high proportion of metal-coated resin powder b with a high metal content. [Figure 18] This is a schematic explanatory diagram showing variant 2 of the inclined separation and recovery device of Example 5, in which two separation and recovery devices are arranged to separate and process metal-coated resin powder b having a low metal content. [Figure 19]FIG. 1 is an explanatory diagram showing a conventional magnetic separator equipped with a hanging-type powerful magnet. DETAILED DESCRIPTION OF THE INVENTION

[0032] The method for separating and recovering the metal and resin from metal-coated resin materials and the apparatus for separating and recovering the metal and resin of the present invention are technologies for separating and recovering the raw metal and resin materials from resin-plated parts and reusing them as raw metal and resin materials, respectively.

[0033] Preferred embodiments of the present invention will now be described with reference to the drawings. Fig. 1 is a schematic diagram of an apparatus for separating and recovering metal and resin from metal-coated resin materials according to the present invention. Fig. 2 shows the state of pulverized metal-coated resin materials, with (a) showing a state in which the metal-coated powder and resin powder are attached, (b) showing a state in which the metal-coated powder and resin powder are separated, (c) showing resin powder with a metal coating, and (d) showing resin powder with a metal coating with only a small amount of metal coating attached. In the method for separating and recovering metal and resin materials of the present invention, as shown in FIG. 1, metal-coated resin material p, such as metal plating, is coarsely pulverized in a primary pulverizer 1, and then this coarsely pulverized metal-coated resin material p is transported by a belt conveyor 2 to a weighing hopper 3, where a predetermined amount is weighed and then transported to a secondary pulverizer 4 for fine pulverization. In this secondary pulverizer 4, the metal-coated resin material p is pulverized to particle sizes ranging from 0.6 mm to 2 mm so that the metal-coated powder a can be easily peeled from the metal-coated resin material p. In the present invention, to make the particle size of the metal-coated resin material p uniform, the pulverized metal-coated resin material p is passed through a mesh screen 5 as needed and then supplied to a coarse sorting belt conveyor 7 from a cyclone 6.

[0034] The resin powder c and the metal-coated resin powder b sorted by the rough sorting belt conveyor 7 are further separated by the precision sorting belt conveyor 13. Thereafter, the separated resin powder c is processed by an injection molding machine or a pellet processing machine as needed and reused as a molding raw material.

[0035] This metal-coated resin material p is pulverized to form a mixed powder m, which is a mixture of metal-coated powder a, resin powder c, and metal-coated resin powder b, as shown in Figure 2. If the particle size of this mixed powder m is pulverized to a size smaller than 0.6 mm, static electricity will cause it to adhere to the belts and mechanical parts of the rough sorting belt conveyor 7 and precision sorting belt conveyor 13 in the next process, making processing time and effort.

[0036] This metal-coated resin material p is not limited to automobile parts such as the door handles and front grilles mentioned above, but can also be used to process waste materials from home appliances and office automation equipment, such as toner cartridges and drums for copiers and printers, parts for laptops, and other parts that are a mixture of metal and resin, such as compact discs and optical discs. [Example]

[0037] <Metal-drop type separation and recovery device with horizontally arranged belt conveyor of Example 1> FIG. 3 is a schematic explanatory diagram showing a horizontally arranged separation and recovery device of a metal dropping type in which the belt conveyor of the first embodiment is arranged horizontally. The horizontally arranged separation and recovery device of Example 1 is a sorting belt conveyor for separating resin and metal mainly in resin powder with a low metal content, and is composed of a coarse sorting belt conveyor 7 and a precision sorting belt conveyor 13. The coarse sorting belt conveyor 7 has a belt 9 stretched horizontally between two rollers 8, one of which is equipped with a magnet 10a. The magnet 10a may be attached to the periphery of the roller 8, or a rod-shaped magnet may be placed inside the cylindrical roller 8. In this coarse sorting belt conveyor 7, magnetic materials such as metal-coated powder a or metal-coated resin powder b are transported to the bottom on belt 9 by the magnetic force of magnets 10a. Materials other than magnetic materials such as resin powder c fall directly at the roller 8. As a result, mixed powder m of metal-coated powder a, resin powder c, and metal-coated resin powder b is separated into metal-coated powder a and metal-coated resin powder b, and resin powder c and metal-coated resin powder b, by the magnetic force of magnets 10a.

[0038] The mixed powder m is supplied to this coarse sorting belt conveyor 7 from a cyclone 6 that collects it via a vibrating feeder 11 (see Figures 1 and 3). The mixed powder m is supplied from the tip of this vibrating feeder 11 onto the coarse sorting belt conveyor 7. The vibrating feeder 11 uniformly distributes the pulverized mixed powder m on the coarse sorting belt conveyor 7, preventing the metal-coated powder a from being buried under the resin powder c and metal-coated resin powder b and being transported without being adsorbed.

[0039] A separator 12 was placed below the destination of the rough sorting belt conveyor 7, i.e., on the side of the magnet 10a (roller 8), to separate the sorted metal-coated powder a and metal-coated resin powder b from resin powder c and metal-coated resin powder b. A precision sorting belt conveyor 13 was placed below this separator 12. This precision sorting belt conveyor 13 is equipped with a magnet 10b (on the right side in Figure 3) on one of the rollers 8 over which the belt 9 is passed, in order to further sort the metal-coated resin powder b sorted by the rough sorting belt conveyor 7.

[0040] The magnets 10a of the coarse sorting belt conveyor 7 and the magnets 10b of the precision sorting belt conveyor 13 are set to have different magnetic forces, so that the adsorption rate of the metal-coated resin powder b can be varied. b’ When separating the particles, the fine sorting belt conveyor 13 uses a magnet 10b stronger in magnetic force than the magnet 10a of the coarse sorting belt conveyor 7. Low metal content Metal-coated resin powder b’ is actively adsorbed and separated from the resin powder c. Although the magnets 10a and 10b are described as permanent magnets in the present invention, they are not limited to permanent magnets and can of course be changed to electromagnets.

[0041] Next, on the precision sorting belt conveyor 13, the resin powder c is collected as it is into the resin collection tank 16. On the other hand, the metal-coated resin powder b and Metal-coated resin powder b' with low metal contentThe resin is attracted to a magnet 10b with a strong magnetic force and transported to the mixture recovery tank 14. Resin powder c and Resin raw material with low metal content b’ The metal-coated powder a and the metal-coated resin powder b adhering to the belts 9 of the rough sorting belt conveyor 7 and the precision sorting belt conveyor 13 are collected. Scratching A rotary scraper 15 is provided to remove the particles.

[0042] Tables 1 and 2 show examples of test results when resin content was recovered from metal-coated resin material p using the coarse sorting belt conveyor 7 and the precision sorting belt conveyor 13 of the present invention. Table 1 shows the average film thickness and amount of recovered resin content for parts whose metal film is made of copper, nickel, and chromium. Table 2 shows the average film thickness and amount of recovered resin content for parts whose metal film is made of nickel and chromium.

[0043] [Table 1]

[0044] [Table 2]

[0045] <Metal Drop Type Horizontally Arranged Separation and Recovery Device of Example 1 (Configuration Equipped with Precision Sorting Belt Conveyor and Magnetic Sorting Device)> FIG. 4 is a schematic explanatory diagram showing a horizontally arranged separation and recovery apparatus of a metal drop type according to Example 1, which is an embodiment of a horizontally arranged separation and recovery apparatus equipped with a precision sorting belt conveyor and a magnetic separator. The horizontally-arranged flat separation and recovery apparatus of the present invention further includes a magnetic separation device 21 capable of adjusting the magnet's adsorption rate, located below the precision sorting belt conveyor 13. This magnetic separation device 21 includes a transport belt conveyor 24 with a belt 23 stretched between rollers 22, and a metal adsorption belt conveyor 25 located above the transport belt conveyor 24, in order to transport the metal-coated powder a and metal-coated resin powder b separated by the precision sorting belt conveyor 13. The metal adsorption belt conveyor 25 includes a belt 23 stretched between rollers 22, and an auxiliary magnet 26 is provided adjacent to the roller 22 (magnet 28) on the inner surface of the lower belt 23. The resin powder c separated by the precision sorting belt conveyor 13 is directly recovered in a first resin recovery tank 27.

[0046] This magnetic separator 21 adjusts the distance between the auxiliary magnet 26 and the metal-coated powder a, the metal-coated resin powder b, etc., to adjust the adsorption rate of the metal-coated resin powder b, thereby reliably separating the metal-coated resin powder b from the metal-coated powder a or the resin powder c. For example, the adsorption rate of the auxiliary magnet 26 can be weakened to reduce the adsorption rate of the metal-coated resin powder b, thereby adsorbing only the metal-coated powder a. One roller 22 (on the right side in FIG. 4 ) of the metal adsorption belt conveyor 25 uses a magnet 28 to transport the metal-coated powder a to the upper surface of the metal adsorption belt conveyor 25, where it is collected in the metal collection tank 30. On the other hand, resin powder b with a metal coating and low metal content was not adsorbed. ’ The resin powder c is conveyed as it is by the conveying belt conveyor 24 and collected in the second resin component collection tank 29.

[0047] <Metal Drop Type Horizontally Arranged Separation and Recovery Device of Example 1 (Another Configuration Equipped with a Precision Sorting Belt Conveyor and a Magnetic Sorting Device)> FIG. 5 is a schematic explanatory view showing yet another embodiment of the horizontally arranged metal drop type separation and recovery device of Example 1. In the embodiment shown in FIG. 5, the conveying direction of the precision sorting belt conveyor 13 is different from that of the embodiment shown in FIG. 4, and the conveying direction of the precision sorting belt conveyor 13 is opposite to that of the coarse sorting belt conveyor 7, and mixture recovery tanks 14 are provided at two locations. In this embodiment, first, the coarse sorting belt conveyor 7 separates and recovers a mixture of metal-coated powder a and metal-coated resin powder b, and resin powder c. Next, the precision sorting belt conveyor 13 also separates and recovers a mixture of metal-coated powder a and metal-coated resin powder b, and resin powder c. These mixtures are separated and recovered using a magnetic separator 21 capable of adjusting the magnet attraction rate. high Resin powder with a thin metal coating b” and metal content low Metal-coated resin powder b’ The system is designed to separate and recover the waste. [Example]

[0048] <Metal-drop type inclined arrangement separation and recovery device in which the belt of Example 2 is inclined arrangement> 6 is a schematic explanatory diagram showing a metal-drop type inclined arrangement separation and recovery device in which the belt is inclined according to Example 2. Note that the same reference numerals are used for the same members as in Example 1, and the description thereof will be omitted. In the metal-drop horizontal separation and recovery device of Example 1, the sorting belt conveyors 7 and 13 are all horizontally positioned. The sorting belt conveyors do not necessarily have to be horizontally positioned. In the inclined separation and recovery device 31 of Example 2, the sorting belt conveyors 32 and 33 are positioned at an incline. By positioning the sorting belt conveyors 31 and 33 at an incline, the resin powder c being transported is not attracted to the magnet 10a (8) and is therefore more likely to fall. For example, the sorting belt conveyors 32 and 33 carrying crushed material are positioned at an inclination angle close to the angle of repose. This angle allows the accumulated resin powder c on the surface side to roll off during transport. In other words, by inclining the sorting belt conveyors 32 and 33 and placing the mixed powder m on the belt 9 at an angle exceeding the angle of repose, the resin powder c and metal-coated resin powder b that are not attracted to the magnet 10a during transport are actively allowed to fall and be separated. By allowing such resin powder c to fall in a manner that causes it to break down in advance, rapid separation is possible.

[0049] The inclined-arrangement-type sorting belt conveyor of Example 2 is primarily suited for the coarse sorting belt conveyor 32. This is because the particle size of the pulverized mixed powder m varies on the coarse sorting belt conveyor 32. It facilitates the dropping and sorting of resin powder c with a relatively large particle size. The inclined-arrangement-type coarse sorting belt conveyor 32 of Example 2 is substantially identical to the configuration of Example 1, except for its inclined arrangement. A belt 9 is stretched obliquely between two rollers 8, one of which is equipped with a magnet 10a. In this coarse sorting belt conveyor 32, the mixed powder m of metal-coated powder a, resin powder c, and metal-coated resin powder b is separated into metal-coated powder a and metal-coated resin powder b, and resin powder c and metal-coated resin powder b, by the magnetic force of the magnet 10a. At this time, the resin powder c and metal-coated resin powder b, which have relatively large particle sizes, are dropped. In the illustrated example, the precision sorting belt conveyor 33 is disposed at an angle. Conversely, the precision sorting belt conveyor 33 can also be disposed horizontally.

[0050] <Modification 1 of the metal drop type inclined arrangement separation and recovery device of Example 2> FIG. 7 is a schematic explanatory diagram showing a first modification of the inclined separation and recovery device of the second embodiment, where (a) shows the device when it is arranged at a steep gradient, and (b) shows the device when it is arranged at a gentle gradient. In the inclined separation and recovery device 31 of the second embodiment, the inclination angles of the coarse sorting belt conveyor 32 and the precision sorting belt conveyor 33 are both variably adjustable. The inclination angles of the coarse sorting belt conveyor 32 and the precision sorting belt conveyor 33 of the second embodiment are not limited to the angle α1 shown in FIG. 6 . The angle of repose of the crushed material on the belt 9 varies depending on the properties of the crushed material, such as the particle size, the metal content of resin-plated parts, or the type of resin. Therefore, as shown in FIG. 7(a), the sorting belt conveyors 32 and 33 can be arranged at a steeper slope (α2) than the angle (α1) shown in FIG. 6 . Conversely, as shown in FIG. 7(b), the sorting belt conveyors 32 and 33 can be arranged at a gentler slope (α3) than the angle (α1) shown in FIG. 6 . Of course, the slope angle is not limited to the illustrated example. Furthermore, although the inclination angles of the coarse sorting belt conveyor 32 and the precision sorting belt conveyor 33 are the same in the illustrated example, it is not necessary for them to be the same. For example, the coarse sorting belt conveyor 32 may be set to a gentle gradient, while the fine sorting belt conveyor 33 may be set to a steep gradient, or vice versa.

[0051] The combination of the inclination angle (α) and the conveying speed of the belt 9 is selected according to the properties of the mixed powder m of the metal-coated powder a, resin powder c, and metal-coated resin powder b. For example, when the mixed powder m has a relatively large particle size, the inclination angle (α) is set to a steep gradient and the conveying speed of the belt 9 is set to a fast gradient. Conversely, when the mixed powder m has a relatively small particle size, the inclination angle (α) is set to a gentle gradient and the conveying speed of the belt 9 is set to a slow gradient.

[0052] <Modification 2 of the metal drop type inclined arrangement separation and recovery device of Example 2> FIG. 8 is a schematic explanatory view showing a second modification of the inclined separation and recovery device of the second embodiment. The sorting belt conveyors 32 and 33 of Example 2 are equipped with a vibrating device 34. The mixed powder m being conveyed is vibrated using the vibrating device 34, causing relatively large powder particles (resin powder b) to float up and small powder particles (resin powder b and metal-coated resin powder b) to sink. This floating large powder particle (resin powder b) tends to roll down.

[0053] <Modification 3 of the metal drop type inclined arrangement separation and recovery device of Example 2> FIG. 9 is a schematic explanatory view showing a third modification of the inclined separation and recovery device of the second embodiment. The sorting belt conveyors 32, 33 of Example 2 are equipped with an air injection device 35. The air injection device 35 blows away relatively large powder particles (resin powder b) that float up during the transport of the mixed powder m, and causes small powder particles (resin powder b and metal-coated resin powder b) to sink. In the illustrated example, a configuration in which the air injection device 35 is provided on each of the sorting belt conveyors 32, 33 is described, but it is not necessarily required to provide the air injection device on both. It may also be provided on either one of the sorting belt conveyors 32, 33. For example, it may be provided on only the rough sorting belt conveyor 32. [Example]

[0054] <Metal adsorption type separation and recovery device with horizontally arranged belt conveyor of Example 3> Fig. 10 is a schematic explanatory diagram of a horizontally arranged metal adsorption-type separation and recovery apparatus in which the belt conveyor is arranged horizontally. Fig. 11 is a schematic explanatory diagram showing a horizontally arranged metal adsorption-type separation and recovery apparatus of Example 3. Note that the same reference numerals are used for the same members as in Examples 1 and 2, and their explanations will be omitted. The horizontally arranged metal adsorption separation and recovery device 41 of Example 3 is a separation device that adsorbs metals upward and has a horizontally arranged belt conveyor. This horizontally arranged metal adsorption separation and recovery device 41 consists of a transport belt conveyor 42 that transports mixed powder m and a metal adsorption belt conveyor 43 arranged above it. This upper metal adsorption belt conveyor 43 has a plate-shaped magnet 44 arranged on the underside and inside of the belt 9. Furthermore, one of the rollers 8 is equipped with a magnet 45 (on the left side in Figure 11).

[0055] In the metal adsorption belt conveyor 43, the metal coated powder a is adsorbed and sucked up from the mixed powder m of the metal coated powder a, resin powder c, and metal coated resin powder b by the magnetic force of the plate-shaped magnet 44, and is separated from the resin powder c and metal coated resin powder b.

[0056] The conveying directions of the belt 9 of the transport belt conveyor 42 and the belt 9 of the metal adsorption belt conveyor 43 are both set to the same direction (in FIG. 11, the upper surface of the belt 9 is conveyed from left to right). However, the lower surface of the belt 9 of the metal adsorption belt conveyor 43 is conveyed from right to left. Therefore, the two belts 9 face each other, and the metal-coated powder a and the metal-coated resin powder b, which are attracted to the belt 9 of the metal adsorption belt conveyor 43 by the magnetic force of the plate-shaped magnets 44, are conveyed to the upper surface of the metal adsorption belt conveyor 43 by the magnets 45 attached to one of the rollers 8.

[0057] This metal adsorption belt conveyor 43 is supplied with a mixed powder m of metal-coated powder a, resin powder c, and metal-coated resin powder b from a collecting cyclone 6 via a vibrating feeder 11. The mixed powder m is fed from the tip of this vibrating feeder 11 onto a conveyor belt 42. The vibrating feeder 11 uniformly distributes the pulverized mixed powder m on the conveyor belt 42, preventing the metal-coated powder a from being buried under the resin powder c and metal-coated resin powder b and being transported without being adsorbed. The conveyor belt 42 is comprised of a belt 9 stretched between rollers 8. While the plate-shaped magnet 44 is described as a permanent magnet in this invention, it is not limited to this and can, of course, be replaced with an electromagnet.

[0058] Above the transport belt conveyor 42, a metal adsorption belt conveyor 43 is disposed. The metal adsorption belt conveyor 43 has a lower belt 9 stretched between rollers 8 and a plate-shaped magnet 44 attached to its inner surface. The metal adsorption belt conveyor 43 and the transport belt conveyor 42, i.e., the gap width d, can be adjusted. This allows the magnetic force of the plate-shaped magnet 44 on the metal-coated resin powder b to be adjusted, thereby varying the adsorption rate. For example, as shown in FIG. 11, the transport belt conveyor 42 is configured to be raised and lowered relative to the metal adsorption belt conveyor 43. Of course, the metal adsorption belt conveyor 43 can also be configured to be raised and lowered.

[0059] In the horizontally arranged metal adsorption separation and recovery device 41 of Example 3, metal-coated powder a in mixed powder m transported from the vibrating feeder 11 on a transfer belt conveyor 42 is attracted to a plate-shaped magnet 44 to separate it from resin powder c. The resin powder c remaining on the transfer belt conveyor 42 is transported directly to a resin recovery tank 49. Meanwhile, the metal-coated powder a attracted to the plate-shaped magnet 44 is transported to the upper surface of the belt 9 of the metal adsorption belt conveyor 43 and transported to a metal recovery tank 48. Therefore, one roller 8 (left side in FIG. 11 ) of the metal adsorption belt conveyor 43 uses a magnet 45. This allows the metal-coated powder a and metal-coated resin powder b to be transported to the upper surface of the metal adsorption belt conveyor 43 and recovered in the recovery tank 48 at the desired position.

[0060] The transfer belt conveyor 42 is equipped with a vibrator 46 that vibrates the belt 9 stretched between rollers 8. By vibrating the mixed powder m on the belt 9, the metal-coated powder a can be easily separated from the resin powder c and the metal-coated resin powder b. A partition frame 47 is attached to the belt 9 of the transfer belt conveyor 42. When the belt 9 is vibrated by the vibrator 46, the partition frame 47 prevents the mixed pulverized material from falling into the recovery tank 48 before the mixed powder m is separated.

[0061] In the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, as shown in Fig. 11, the distance d between the transport belt conveyor 42 and the metal adsorption belt conveyor 43 is widened to reduce the rate at which the metal-coated resin powder b in the mixed powder m is adsorbed to the magnet 8. This allows the metal-coated resin powder b to be reliably separated from the resin powder c in accordance with the content of the metal-coated powder adhering to it, as shown in Fig. 11. This allows the metal raw material or resin raw material to be recycled into a material with a low content of metal-coated resin powder.

[0062] Conversely, by narrowing the gap d between the transport belt conveyor 42 and the metal adsorption belt conveyor 43, the adsorption rate of the metal-coated resin powder b in the mixed powder m to the magnet 8 is increased. This allows the metal-coated resin powder b to be adsorbed and reliably separated from the resin powder c. As a result, the resin can be recycled into a resin raw material with a low content of metal-coated resin powder b.

[0063] <Modification of the horizontally arranged metal adsorption type separation and recovery device of Example 3> FIG. 12 is a schematic explanatory view showing another embodiment of the horizontally disposed metal adsorption type separation and recovery apparatus of Example 3. The horizontally arranged metal adsorption-type separation and recovery apparatus 41 of Example 3 can be used in combination with a separation apparatus of another configuration, such as the drop-type separation and recovery apparatus 7, 13 of Example 1, to regenerate high-purity metal raw materials and resin raw materials. The horizontally arranged metal adsorption-type separation and recovery apparatus 41 of Example 3 does not need to be used in combination with only the above-mentioned transport belt conveyor 42 and metal adsorption belt conveyor 43. In the apparatus shown in Figure 12, first, the pulverized mixed powder m is simply separated into metal-coated powder a, metal-coated resin powder b, and resin powder c by the separation and recovery apparatus 7, 13, for example, in which magnets 10a are configured in the roller 9 portion described in Example 1, and only the resin powder c is recovered in each recovery tank 48, 49.

[0064] Next, the mixed powder m of metal-coated powder a and metal-coated resin powder b is further separated and recovered with high precision into metal-coated powder a, metal-coated resin powder b, and resin powder c using the horizontally arranged metal adsorption separation and recovery device 41 of Example 3. In this case, the distance d between the transport belt conveyor 42 and the metal adsorption belt conveyor 43 is adjusted depending on the type of metal and resin in the mixed powder m and the particle size, thereby reducing the adsorption rate of the metal-coated resin powder b in the mixed powder m to the magnet 8.

[0065] Furthermore, the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3 is not limited to a combination of one set of transport belt conveyor 42 and metal adsorption belt conveyor 43. For precise separation, two sets of transport belt conveyor 42 and metal adsorption belt conveyor 43 can be arranged as shown in Figures 4 and 5 of Example 1, and metal-coated resin powder b can be separated into resin powder c and metal powder a. Furthermore, the transport direction of each belt conveyor 42 can be changed as appropriate.

[0066] Although not shown, the horizontally arranged metal adsorption separation and recovery device 41 of Example 3 is arranged such that the total length of the metal adsorption belt conveyor 43 in the conveying direction is longer than the total length of the transport belt conveyor 42 in the conveying direction. With this arrangement, the metal-coated powder a and metal-coated resin powder b adsorbed to the underside of the metal adsorption belt conveyor 43 can be recovered at one end of the metal adsorption belt conveyor 43. In this case, a scraper (not shown) is provided on the metal adsorption belt conveyor 43 to scrape them off.

[0067] Furthermore, in the horizontally arranged metal adsorption type separation and recovery device 41 of Example 3, although not shown, in order to recover the adsorbed metal-coated powder a and metal-coated resin powder b, the metal adsorption belt conveyor 43 and the transport belt conveyor 42 can be positioned offset in the transport direction, allowing the powder to be recovered at one end of the metal adsorption belt conveyor 43.

[0068] If one simply wants to increase the recovery rate of metal materials, the distance d between the transport belt conveyor 42 and the metal adsorption belt conveyor 43 can be shortened. The recovered mixture of metal-coated powder a and metal-coated resin powder b can be recycled into metal raw material or resin raw material with a low content of metal-coated resin powder by separating and recovering it again.

[0069] Although not shown, the horizontally arranged metal adsorption separation and recovery apparatus 41 of Example 3 does not need to be used in combination with the above-mentioned set of transport belt conveyor 42 and metal adsorption belt conveyor 43 alone, and is preferably used in combination with the separation and recovery apparatus of Example 1 or 2. First, the pulverized mixed powder m is simply separated into metal-coated powder a, metal-coated resin powder b, and resin powder c using another magnetic separator, for example, with magnets in the roller portion, and only resin powder c is recovered. Next, the mixed powder m of metal-coated powder a and metal-coated resin powder b is further separated and recovered with high precision into metal-coated powder a, metal-coated resin powder b, and resin powder c using the horizontally arranged metal adsorption separation and recovery apparatus 41 of Example 3. In this case, the adsorption rate of the metal-coated resin powder b in the mixed powder m to the magnet can be reduced by adjusting the distance d between the transport belt conveyor 42 and the metal adsorption belt conveyor 43 depending on the type of metal and resin in the mixed powder m and the size of the particle size. [Example]

[0070] <Metal adsorption type separation and recovery device with inclined belt conveyor of Example 4> 13 is a schematic explanatory diagram showing an inclined metal adsorption separation and recovery apparatus in which the belt conveyor is inclined according to Example 4. Note that the same reference numerals are used for the same members as in Examples 1, 2 and 3, and their explanations will be omitted. In the metal adsorption type horizontally arranged separation and recovery device 41 of Example 3, the sorting belt conveyors 42 and 43 are all arranged horizontally. The sorting belt conveyors do not necessarily have to be arranged horizontally. In the inclined arrangement separation and recovery device 51 of Example 4, the conveying belt conveyor 52 and the metal adsorption belt conveyor 53 are arranged at an incline. By arranging the conveying belt conveyor 52 and the metal adsorption belt conveyor 53 at an incline in this way, the resin powder c being transported is not attracted to the magnet and falls directly to the lower side. For example, the sorting belt conveyor 52 carrying the crushed material is arranged at an inclination angle close to the angle of repose. By setting this angle, the accumulated resin powder c on the surface side is more likely to roll off during transport. By causing the resin powder c to fall so that it crumbles in advance, it can be separated quickly.

[0071] The inclined sorting belt conveyor 51 of Example 4 is primarily suited to use as a coarse sorting belt conveyor. This is because crushed materials have varying particle sizes. This is because the resin powder (c) with a relatively large particle size can be more easily dropped and sorted. The inclined sorting belt conveyor 52 of Example 4 is substantially identical in configuration to Example 3, except for its inclined arrangement. The coarse sorting belt conveyor 52 has a belt 9 stretched between rollers 8, one of which is equipped with a magnet 45. The coarse sorting belt conveyor 7 separates a mixed powder (m) of metal-coated powder (a), resin powder (c), and metal-coated resin powder (b) into metal-coated powder (a) and metal-coated resin powder (b) and resin powder (c) and metal-coated resin powder (b) by the magnetic force of the magnet 45. During this process, the resin powder (c) and metal-coated resin powder (b), which have relatively large particle sizes, are allowed to drop.

[0072] <Modification 1 of the metal drop type inclined arrangement separation and recovery device of Example 4> FIG. 14 is a schematic explanatory view showing a first modification of the inclined separation and recovery device of the fourth embodiment. A first modification of the conveying belt conveyor 52 of the fourth embodiment is provided with an air injection device 35 that blows away the relatively large powder particles (resin powder c) that float up during the conveyance of the mixed powder m. The air injection device 35 of this first modification can blow away the large powder particles (resin powder c) and sink the small powder particles (resin powder c and metal-coated resin powder b). The illustrated example describes a configuration in which the air injection device 35 is disposed on the conveying belt conveyor 52. Note that, since the relatively large pulverized resin particles transported by the suction belt conveyor 53 disposed above the conveying belt conveyor 52 have already fallen and been separated, the effect of the forced falling process by the air injection device 35 is small, and therefore the air injection device 35 is not necessarily required.

[0073] <Modification 1 of the metal adsorption type gradient arrangement separation and recovery device of Example 4> FIG. 15 is a schematic explanatory diagram showing a second modification of the inclined separation and recovery device of the fourth embodiment, where (a) shows the device when it is arranged at a steep gradient, and (b) shows the device when it is arranged at a gentle gradient. The inclination angles of the sorting belt conveyor 52 and the precision sorting belt conveyor 53 in the fourth embodiment can be configured to be adjustable. The inclination angles of the coarse sorting belt conveyor 52 and the precision sorting belt conveyor 53 in the second embodiment are not limited to the angle (β1) shown in FIG. 13. The angle of repose on the belt 9 varies depending on the properties of the pulverized material. Therefore, as shown in FIG. 15(a), the sorting belt conveyors 52 and 53 can be arranged at a steeper slope (β2) than the angle (β1) shown in FIG. 13. Conversely, as shown in FIG. 15(b), the sorting belt conveyors 52 and 53 can be arranged at a gentler slope (β3) than the angle (β1) shown in FIG. 13. Of course, this slope angle is not limited to the illustrated example. Furthermore, in the illustrated example, the inclination angles of the coarse sorting belt conveyor 32 and the precision sorting belt conveyor 53 are the same, but they do not need to be the same. For example, the rough sorting belt conveyor 52 may be set to a gentle gradient, while the fine sorting belt conveyor 53 may be set to a steep gradient.

[0074] The combination of the inclination angle (β) and the conveying speed of the belt 9 is selected according to the properties of the mixed powder m of the metal-coated powder a, resin powder c, and metal-coated resin powder b. For example, when the mixed powder m has a relatively large particle size, the inclination angle (α) is set to a steep gradient and the conveying speed of the belt 9 is set to a fast gradient. Conversely, when the mixed powder m has a relatively small particle size, the inclination angle (α) is set to a gentle gradient and the conveying speed of the belt 9 is set to a slow gradient.

[0075] The present invention is not limited to the above-described embodiment of the invention, and as long as the method or processing device reduces the adsorption rate of metal-coated resin powder b in pulverized mixed powder m and reliably separates this metal-coated resin powder b from metal-coated powder a or resin powder c, thereby regenerating high-purity metal raw materials and resin raw materials, it is not limited to the configuration of the illustrated process, processing equipment, or processing device, and can of course be modified in various ways within the scope of the gist of the present invention. [Example]

[0076] <Sorting-type separation and recovery device with inclined belt conveyor of Example 5> 16 is a schematic diagram showing a sorting-type separation and recovery device in which a belt conveyor is arranged at an angle and vibrated to separate metal and resin components according to Example 5. Note that the same reference numerals are used for the same members as in Examples 1, 2, 3, and 4, and their explanations will be omitted. The sorting-type separation and recovery device 61 of Example 5 comprises a sorting-type belt conveyor 62 in which a belt 9 is hung at an angle between two rollers 8. One of the rollers 8 is equipped with a magnet 45 (on the right side in Figure 16). Furthermore, a plate-shaped magnet 44 is disposed on the upper surface and inside of the belt 9. A vibrating device 46 that vibrates the sorting-type belt conveyor 62 is also provided. The vibration feeder 11 is disposed so that the supply position (drop position) of the mixed powder m is near the magnet 45(8) located at a higher position on the belt 9. The belt 9 is operated to transport the mixed powder m from the lower roller 8 to the higher roller 45(8).

[0077] In the sorting belt conveyor 62, mixed powder m is placed in a vibrating state on the belt 9 from the vibrating feeder 11. Of the mixed powder m vibrating on the inclined belt 9, resin powder c with a low specific gravity floats up on the vibrating belt 9. The floating resin powder b is not attracted to the plate-shaped magnet 44, and since the inclined belt 9 exceeds the angle of repose, it slides down the belt 9.

[0078] On the other hand, the metal-coated powder a and metal-coated resin powder b, which have a high specific gravity, sink to the bottom on the belt 9 due to the magnetic force of the plate-shaped magnet 44, and are carried to the magnet 45 (8) above by the conveyance of the belt 9. This separates them into metal and resin fractions.

[0079] The inclination angle of the sorting belt conveyor 62 is configured to be variably adjustable. The inclination angle of the sorting belt conveyor 62 is set to a value close to the angle of repose depending on the properties of the pulverized material (mixed powder m). Similarly, the conveying speed is also adjusted depending on the properties of the pulverized material (mixed powder m).

[0080] <Modification 1 of the sorting type separation and recovery device of Example 5> Figure 17 is a schematic diagram showing variant 1 of the inclined separation and recovery device of Example 5, in which two separation belt conveyors are arranged to perform separation processing when there is a high proportion of metal-coated resin powder b with a high metal content. It can also be used in combination with the sorting-type separation and recovery device of Example 5. As described above, if mixed powder m is a mixture of metal-coated powder a and resin powder c, the separation process can be completed in one process. In reality, as shown in Figure 2, in addition to metal-coated powder a and resin powder c, it also contains metal-coated resin powder b with a high metal content and metal-coated resin powder b' with a low metal content.

[0081] The separation and recovery device 61 of the first modification uses two sorting belt conveyors 62 to perform a two-stage separation process. The resin component (resin powder c) sorted as a resin component by the upper-stage separation and recovery device 61 contains metal-coated resin powders b and b'. The lower-stage separation and recovery device 61 separates and extracts metal-coated resin powder b', which has a high metal content, from the metal-coated resin powders b and b'. To achieve this, the magnet 45 (8) of the lower-stage sorting belt conveyor 62 is positioned below the upper-stage sorting belt conveyor 62. The magnetic force of the plate-shaped magnet 44a of the lower-stage sorting belt conveyor 62 is set stronger than the magnetic force of the plate-shaped magnet 44b of the upper-stage sorting belt conveyor 62. Recovery in this manner enables precise separation. Modification 1 is suitable for a mixed powder m in which the content of metal-coated resin powder b having a high metal content is higher than that of metal-coated resin powder b' having a low metal content.

[0082] <Modification 2 of the sorting type separation and recovery device of Example 5> Figure 18 is a schematic diagram showing variant 2 of the inclined separation and recovery device of Example 5, in which two separation and recovery devices are arranged to separate and process metal-coated resin powder b, which has a low metal content. Variation 2 also uses two sorting belt conveyors 62 to perform separation processing in two stages, but is suitable for mixed powder m in which the proportion of metal-coated resin powder b with a high metal content is lower than that of metal-coated resin powder b' with a low metal content. Variation 2 includes metal-coated resin powders b and b' that have been sorted into resin fractions by the upper sorting belt conveyor 62. The lower sorting belt conveyor 62 separates the metal-coated resin powder b, which has a high metal content, from the metal-coated resin powders b and b'. To achieve this, the plate-shaped magnet 44 of the lower sorting belt conveyor 62 is positioned below the magnet 45(8) of the upper sorting belt conveyor 62. The magnetic force of the plate-shaped magnet 44a of the lower sorting belt conveyor 62 is made stronger than the magnetic force of the plate-shaped magnet 44b of the upper sorting belt conveyor 62. [Industrial Applicability]

[0083] The method and apparatus for separating and recovering the metal and resin materials from metal-coated resin materials of the present invention can be used to separate and recover the metal raw material and resin raw material from resin-plated parts and reuse them as the metal raw material or resin raw material, respectively. [Explanation of symbols]

[0084] 7 Rough sorting belt conveyor 8. Laura 9 Belt 10a Magnet 12 Separator 13 Precision sorting belt conveyor 34 Vibration device 35 Injection device 42 Conveyor belt 43 Metal adsorption belt conveyor 44 Plate magnet 62 Sorting belt conveyor d. Distance between the transport belt conveyor and the metal adsorption belt conveyor p Metal coated resin material a Metal coated powder b Metal-coated resin powder b’ Metal-coated resin powder with low metal content c Resin powder c’ Resin powder with low metal content m mixed powder

Claims

1. The metal-coated resin material (p) having the metal coating attached thereto is pulverized to produce a mixed powder (m) of the metal-coated powder (a), the metal-coated resin powder (b) and the resin powder (c); While conveying the mixed powder (m) on an inclined belt (9), the resin powder (c) slides off first, and the mixed powder (m) is separated into the resin powder (c) and the metal-coated resin powder (b) and the metal-coated powder (a) using a magnetic force; Furthermore, the method for separating and recovering the metal and resin material of metal-coated resin material is characterized in that the separated resin powder (c) and metal-coated resin powder (b) are transported on an inclined belt (9), the resin powder (c) slides off first, and the resin powder (c') with a low metal content is separated and recovered using magnetic force.

2. The resin powder (c) and the metal-coated resin powders (b, b') are conveyed by an inclined belt (9), the resin powder (c) slides down first, and the metal-coated resin powder (b') having a low metal content is separated by magnetic force, 2. A method for separating and recovering metal and resin material from metal-coated resin material as described in claim 1, characterized in that a magnet (10b) with a stronger magnetic force than the magnet (10a) used when initially separating the mixed powder (m) is used to adsorb and separate the metal-coated resin powder (b') with a low metal content from the resin powder (c).

3. a rough sorting belt conveyor (7) having two rollers (8) over which a belt (9) is inclined and stretched, one of which is provided with a magnet (10a), in order to sort the mixed powder (m) of the pulverized metal-coated powder (a), the resin powder (c), and the metal-coated resin powder (b); a separator (12) disposed below the destination of the rough sorting belt conveyor (7) for separating the sorted metal-coated powder (a) and metal-coated resin powder (b) from the resin powder (c) and metal-coated resin powder (b); a precision sorting belt conveyor (13) disposed below the separator (12) for further sorting the metal-coated resin powder (b), the precision sorting belt conveyor (13) comprising two rollers (8) across which a belt (9) is inclined and one of which is provided with a magnet (10b); An apparatus for separating and recovering metal and resin materials from metal-coated resin materials, comprising:

4. 4. The apparatus for separating and recovering metal and resin materials from metal-coated resin materials according to claim 3, further comprising a vibration device (34) for vibrating the belt (9) of the rough sorting belt conveyor (7).

5. 4. The apparatus for separating and recovering metal and resin material from metal-coated resin material according to claim 3, further comprising an injection device (35) for injecting air above the belt (9) of the coarse sorting belt conveyor (7).

6. The metal-coated resin material (p) having the metal coating attached thereto is pulverized to produce a mixed powder (m) of the metal-coated powder (a), the resin powder (c), and the metal-coated resin powder (b); While the mixed powder (m) is conveyed by an inclined belt (9), the resin powder (c) slides down first, and the metal-coated powder (a) and the metal-coated resin powder (b) are attracted by the magnetic force of a plate-like magnet (44), sucked up, separated, and recovered. The method for separating and recovering the metal and resin material of a metal-coated resin material is characterized in that the magnetic force of the plate-like magnet (44) is adjusted to vary the adsorption rate of the metal-coated resin powder (b).

7. 7. The method for separating and recovering metal and resin material from metal-coated resin material according to claim 6, wherein when separating the metal-coated powder (a) and the metal-coated resin powder (b) from the mixed powder (m), the distance (d) between the mixed powder (m) and the plate-shaped magnet (44) that adsorbs and sucks up the metal-coated powder (a) and the metal-coated resin powder (b) is widened to reduce the adsorption rate of the metal-coated resin powder (b), thereby separating and recovering only the metal-coated powder (a) having a high metal content.

8. 7. The method for separating and recovering metal and resin material from metal-coated resin material according to claim 6, characterized in that, when separating the resin powder (c) and the metal-coated resin powder (b, b') from the mixed powder (m), the distance (d) between the mixed powder (m) and the plate-shaped magnet (44) that adsorbs and sucks up the metal-coated powder (a) and the metal-coated resin powder (b) is narrowed to increase the metal adsorption rate, thereby separating and recovering the metal-coated resin powder (b') with a low metal content.

9. a conveying belt conveyor (42) in which a belt (9) is stretched obliquely between two rollers (8) for conveying a mixed powder (m) of the pulverized metal-coated powder (a), the resin powder (c), and the metal-coated resin powder (b); a metal adsorption belt conveyor (43) arranged above the transport belt conveyor (42) and having a belt (9) stretched obliquely between two rollers (8); a plate-like magnet (44) provided on the inner surface of the lower belt (9) of the metal adsorption belt conveyor (43) for adsorbing and sucking up the metal-coated powder (a) and the metal-coated resin powder (b); The separation and recovery device for metal and resin materials of metal-coated resin materials is characterized in that the distance (d) between the transport belt conveyor (42) and the metal adsorption belt conveyor (43) can be adjusted.

10. 10. The separation and recovery device for metal and resin material of metal-coated resin material according to claim 9, wherein the metal adsorption belt conveyor (43) is configured to raise and lower the transport belt conveyor (42).

11. 10. The separation and recovery device for metal and resin materials of metal-coated resin materials as described in claim 9, characterized in that the metal adsorption belt conveyor (43) is arranged so that its total length in the conveying direction is longer than the total length in the conveying direction of the transport belt conveyor (42), and is configured to recover the adsorbed metal-coated powder (a) and metal-coated resin powder (b).

12. 10. The separation and recovery device for metal and resin materials of metal-coated resin materials as described in claim 9, characterized in that the metal adsorption belt conveyor (43) and the transport belt conveyor (42) are arranged offset in the transport direction, and are configured to recover the adsorbed metal-coated powder (a) and metal-coated resin powder (b).

13. 10. The apparatus for separating and recovering metal and resin material from metal-coated resin material according to claim 9, further comprising an injection device (35) for injecting air above the belt (9) of the conveying belt conveyor (42).

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