JP2006159051A - Sorting recovery apparatus for mixed waste plastic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide high productivity of an extrusion step by removing a rubber in a sorting/recovery line from mixed waste plastic. <P>SOLUTION: The apparatus is provided with a material feeding part for feeding the mixed waste plastic containing the plastic and the rubber from a shredder dust; a conveying conveyor fed with the mixed waste plastic from the material feeding part and conveying the mixed waste plastic; one or more needle-like rod aggregate having a needle-like rod for only sticking the rubber in the mixed waste plastic on the conveying conveyor; a plastic recovery box for recovering the plastic left and conveyed on the conveying conveyor; and a rubber recovery part for recovering the rubber recovered by the needle-like rod aggregate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technology for selecting and collecting plastic from mixed waste plastic with high purity.

In general, waste materials such as shredder dust, OA, automobiles, etc. are used to remove light metal called magnetic metal, non-magnetic metal, and dust using a metal sorter, wind sorter, etc. Furthermore, it sorts for every kind of plastic by wet sorting etc.
JP 2002-86014 A Japanese Patent Laid-Open No. 11-226957 JP-A-9-49250 Japanese Patent Laid-Open No. 10-219736

  Many shredder dusts from waste home appliances, OA, automobiles, and the like generally contain an elastic body called rubber. Rubber is a polymer material with excellent stretchability, and there are natural rubber made from rubber tree sap and synthetic rubber synthesized artificially. Generally, rubber is called an elastomer and is known to have a high resilience compared to general-purpose plastics such as polypropylene, ABS resin, and polystyrene resin.

  In addition, natural rubber, butadiene rubber, and silicon rubber are generally 0.9 to 0.98 in specific gravity, which is close to the value of polyprene resin. When sorting by specific gravity, it is inevitable that rubber is mixed into polypropylene resin. .

  In sorting and collection of mixed waste plastic from shredder dust, the sorting and collection method is generally based on specific gravity, and when the apparent specific gravity is close to the material to be sorted, the material after sorting and collection is made of rubber. May be included. When the rubber is pelletized from the recovered plastic by an extruder, the rubber is removed by a screen mesh, which has been a major factor that hinders the productivity of the extruder.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to remove rubber in a sorting / collecting line from mixed waste plastic to obtain high productivity in an extrusion process.

  The apparatus for sorting and collecting mixed waste plastic according to the present invention is characterized in that the mixed waste plastic containing the plastic and rubber from the shredder dust is removed by removing the rubber by piercing the rubber with a needle-like bar and collecting the plastic. .

  Since the mixed waste plastic sorting and collecting apparatus according to the present invention can prevent rubber from being mixed into the mixed waste plastic after sorting by the above-described configuration, the productivity is greatly improved in the process of extruding and pelletizing the plastic after sorting. Can be improved.

Embodiment 1 FIG.
1 and 2 are views showing Embodiment 1, FIG. 1 is a side view showing a rubber sorting device, and FIG. 2 is a perspective view showing the rubber sorting device. As shown in FIG. 1, the plastic 1 and the rubber 2 can be sorted by cutting the mixture of the plastic 1 and the rubber 2 only with the needle-like bar 3 and not the plastic 1.

  As shown in FIG. 2, the mixture of plastic 1 and rubber 2 supplied from the material supply port 4 is supplied onto a belt conveyor 9. The supplied mixture of plastic 1 and rubber 2 is conveyed to a belt conveyor 9 driven by rollers 7 and 8, and only rubber 2 is stabbed by an assembly of one or more needle-like bars 3. The collected plastic 1 is conveyed by the belt conveyor 9 without being stabbed. The conveyed plastic 1 is collected in a plastic collection box 13. The rubber 2 collected by the needle bar 3 is scraped by the scraper 10 and removed and collected.

  With the above configuration, the plastic 1 and the rubber 2 can be automatically sorted and collected by the rubber sorting device.

Embodiment 2. FIG.
3 to 5 are views showing the second embodiment, FIG. 3 is a side view showing a rubber sorting device, FIG. 4 is a detailed view of a material supply unit, and FIG. 5 is a detailed view of a skewering unit. As shown in FIG. 3, the mixture of the plastic 1 and the rubber 2 supplied from the material supply port 4 by the vibration feeder 5 is supplied and carried on a belt conveyor 9 driven by rollers 7 and 8. The conveyed mixture of plastic 1 and rubber 2 is spread evenly on the belt conveyor 9 by the leveling plate 6 and then stabbed and collected by the rotating needle bar 3. In this case, it is necessary to spread so that the mixture of the plastic 1 and the rubber 2 does not overlap. When the rubber 2 overlaps the lower side of the plastic 1, the needle bar 3 does not reach and cannot be sufficiently recovered.

  As shown in FIG. 4, the mixture of the plastic 1 and the rubber 2 can be spread evenly by the leveling plate 6 in order to skew the rubber 2 with the needle-like bar 3.

  As shown in FIG. 5, the rubber sorting device includes one or more skewers. In order to scrape and collect the rubber 2 with the needle-like bar 3, the small rubber 2 cannot be stuck unless the distance between the belt conveyor 9 and the needle-like bar 3 is adjusted to be smaller than the minimum diameter of the rubber 2. . Therefore, the belt conveyor 9 needs to be always kept horizontal, and a horizontal holding plate 11 is provided to prevent the belt conveyor 9 from being bent.

  The horizontal holding plate 11 is supported by the horizontal holding cylinder 15 so as to keep the level, and even when the needle bar 3 is pressed from above, the holding force can be adjusted so that the needle bar 3 escapes downward without bending. Provide structure.

  The needle-like bar 3 has a rotation mechanism and is always rotating toward the material traveling side, so that only the rubber 2 can be continuously collected without preventing the material from being carried out. The needle bar 3 is held by a needle bar holding frame 12, and the needle bar holding frame 12 includes a needle bar pressing cylinder 14 and is pressed downward with a constant force.

  Due to the functions of the needle-like bar pressing cylinder 14 and the horizontal holding plate 11, the needle-like bar 3 is pressed against the mixture of the plastic 1 and the rubber 2 with a uniform and constant force, so that the needle-like bar 3 is bent and broken. Therefore, it is possible to recover only the rubber 2 from the mixture of the plastic 1 and the rubber 2 in a stable state. Further, the recovered rubber 2 is scraped off by the scraper 10 and only the rubber 2 can be recovered. The plastic 1 is collected by a plastic collection box 13.

Embodiment 3 FIG.
6 and 7 show the third embodiment, FIG. 6 shows a rubber skewer, and FIG. 7 shows details of the rubber skewer mechanism.
In this embodiment, the rubber 2 is recovered from the mixture of the plastic 1 and the rubber 2 having the needle block 16 having a mechanism in which the tip of the needle bar 3 is held by the spring 17 in the second embodiment. It is about the device to do.

  The needle block 16 is provided with a return mechanism by a spring 17, and the rubber 2 can be efficiently recovered by maintaining a sufficient pressing pressure when the plastic 1 and the rubber 2 are recovered.

It is a figure which shows Embodiment 1, and is a side view which shows a rubber sorting device. It is a figure which shows Embodiment 1, and is a perspective view which shows a rubber sorting device. It is a figure which shows Embodiment 2, and is a side view which shows a rubber sorting device. It is a figure which shows Embodiment 2, and is a detail figure of a material supply part. It is a figure which shows Embodiment 2, and is a detail figure of a skewering part. It is a figure which shows Embodiment 3, and is a figure which shows a rubber skewer part. It is a figure which shows Embodiment 3, and is a figure which shows the detail of a rubber skewering mechanism.

Explanation of symbols

  1 Plastic, 2 Rubber, 3 Needle-shaped bar, 4 Material supply port, 5 Vibration feeder, 6 Leveling plate, 7 Roller, 8 Roller, 9 Belt conveyor, 10 Scraper, 11 Horizontal holding plate, 12 Needle-shaped rod holding frame, 13 Plastic recovery box, 14 Needle-shaped bar pressing cylinder, 15 Horizontal holding cylinder, 16 Needle-shaped block, 17 Spring.

Claims (5)

  An apparatus for sorting and collecting mixed waste plastic, wherein the mixed waste plastic containing plastic and rubber from shredder dust is removed by piercing the rubber with a needle bar to recover the plastic. A material supply for supplying mixed waste plastic including plastic and rubber from shredder dust,
The mixed waste plastic is supplied from the material supply unit, and a conveyor conveys the mixed waste plastic,
One or more needle-like bar assemblies having needle-like bars that pierce only the rubber in the mixed waste plastic on the conveyor;
A plastic recovery box for recovering the plastic that is transported remaining on the transport conveyor;
A sorting and collecting apparatus for mixed waste plastic, comprising: a rubber collecting unit that collects the rubber collected by the needle-shaped bar assembly.   3. The apparatus for sorting and collecting mixed waste plastic according to claim 2, further comprising a leveling device for uniformly spreading the mixed waste plastic supplied from the material supply unit to the transport conveyor on the transport conveyor. . A horizontal holding mechanism for holding the transport conveyor horizontally;
The apparatus for sorting and collecting mixed waste plastic according to claim 2 or 3, further comprising a needle-like bar pressing mechanism that presses the needle-like bar against the conveyor with a constant pressure.   5. The mixed waste plastic sorting and collecting according to claim 2, 3 or 4, wherein the needle-shaped bar assembly includes a mechanism in which a tip of the needle-shaped bar is held by a spring. apparatus.

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