JP2001232631A - Recycling working machine for waste plastic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize quality of a pellet by quantitatively supplying crushed plastics to a conveyor. SOLUTION: An agitating blade 16 and a screw conveyor 2 are started to be rotated by a drive motor M, and crushed plastic pieces are charged in a hopper 11. The plastics in a housing 13 and the hopper 11 are agitated vertically by a rotation of the blade 16, and the plastics in the housing are gradually dropped and moved toward a belt conveyor 2 at each predetermined quantity while being agitated. The plastics are heated by a friction in a conveyor case 21 in the conveyor 2, and become a semi-molten state by the heating. The plastics are efficiently kneaded by a kneading extrusion means 3, completely molten by a heating means 33, and then the pellet is manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for regenerating a relatively small food container from a large case made of, for example, discarded thermoplastic plastic.

[0002]

2. Description of the Related Art Conventionally, an apparatus for regenerating a thermoplastic synthetic resin material includes a drum-shaped storage container provided with a pulverizer / mixer in a bottom portion so as to be rotatable about a substantially vertical axis. The screw case (housing) of this extruder is provided at its intake end through an opening formed in the wall of the storage container, with the screw-type extruder provided in the radial direction with respect to the axial direction of the container. The opening is connected to the inside of the lever container, and the opening is for processing a thermoplastic synthetic resin comprising a screw-type extruder arranged at a position provided in the crushing and mixing tool, and the screw-type The screw and screw case of the extruder are arranged at the height where the crushing and mixing device is located, and at the location where the opening is provided, the screw and the screw case conform to or conform to the shape of the inner wall of the storage container. The free end of the processing blade of the crushing and mixing tool is located with respect to the inner wall, and during use of the apparatus, in addition to the centrifugal force component, a pressing component is added to the synthetic resin material so that the synthetic resin material In order to be pushed into the screw-type extruder by the pressing component, the processing blade is positioned backward with respect to the rotation direction of the processing blade. (JP-B-63-17608).

[0003]

However, in such a conventional apparatus for regenerating and processing a thermoplastic resin, the apparatus is intermittently operated by a processing blade of a crushing / mixing tool rotatably provided at the bottom of a drum type storage container. Since the crushed plastic is fed into a screw case, the supply amount of the crushed plastic to the device for heating and forming the granules (pellets) is not constant, and the quality of the pellets is not stable.

[0004] Therefore, an object of the present invention is to provide an apparatus for remanufacturing a waste plastic material capable of stabilizing the quality of pellets by quantitatively supplying crushed plastic to a conveying apparatus.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is characterized in that a fixed amount supply means having a hopper above, a transfer means connected to the fixed amount supply means, The kneading and extruding means is provided downstream of the conveying means, and the quantitative supply means includes a hopper into which the crushed waste plastic is charged, a housing provided under the hopper, and a housing provided in communication therewith. A rotary drive shaft installed horizontally in the housing, and a stirring blade provided horizontally in a radial direction from the rotary drive shaft via a support arm, the transfer means being provided at a lower end opening of the housing. It is a screw conveyor connected continuously,
The kneading and extruding means is for kneading and heating the plastic material fed from the screw conveyor, and sends it to a device for forming granules.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a waste plastic material recycling apparatus according to an embodiment of the present invention; FIG. When this processing apparatus is roughly classified, a fixed amount supply means 1 having a hopper above, a transfer means 2 connected to the fixed amount supply means, and a fixed amount supply means connected downstream of the transfer means are provided. And kneading and extruding means 3.

Therefore, the structure of the fixed-quantity supply means 1 will be described first. A hopper 11 is provided at the upper part, and level meters 12, 121 are installed at two upper and lower parts in the hopper.
The lower end opening of the hopper communicates with the upper end opening of the housing 13. A lower end of the housing 13 is also opened, and a rotary drive shaft 14 is rotatably installed in the housing in a horizontal direction. The rotary drive shaft is fixed to a drive motor fixed outside the side wall of the housing. M
The rotary drive shaft is provided with four support arms 15 radially at equal angular intervals of 90 degrees, and the tip of each support arm is orthogonal to the support arm. The stirring blade 16 is provided in the direction in which the stirring is performed, ie, in the horizontal direction. The support arms 15 may be provided at an angular interval of 180 degrees, and the stirring blade 16 is appropriately selected from a columnar one and a plate-like one.

Next, the structure of the squeeze conveyor 2 as a conveying means will be described. A conveyor case 21 constituting the screw conveyor, and biaxial screws 22 and 22 rotatably inserted in the case. (FIG. 2). The base end 22a (left end) of the rotary shaft of the two-axis screw is rotatably supported by a support frame 23, and the base end is a drive motor (not shown). , And is rotationally driven via a gear 24 that is rotationally driven by the gears and a speed reduction mechanism 25 that is rotated by the gears. Further, a tip end portion 22 b of the rotating shaft of the screw 22 is rotatably supported by a bearing 32 on a frame portion 31 of the kneading and pushing means 3. The outer peripheral edge of the rotating shaft of the twin screw 22 is close to the inner wall of the case 21 and heats the plastic by friction with the crushed plastic supplied into the case.

Next, a heating device 33 is provided in the kneading and extruding means 3.
In the extruding means, the plastic material fed from the screw conveyor 2 is kneaded and heated, the melting is reduced by this heating, and the plastic material melted from this means is sent to an apparatus for forming granules, and the granules, That is, pellets are produced. An apparatus for producing granules formed from a plastic melt is known from JP-A-59-207209.

The operation of the plastic recycling process according to the present invention will now be described. In FIG. 1, the rotation of the stirring blades 16, 16 is started by the drive motor M, and the screw 22 is also started to rotate. Therefore, for example, a thermoplastic plastic piece obtained by previously crushing a synthetic resin waste tray is put into the hopper 11, and the feeding is continued until the level gauge 12 located above detects the hopper.
At this time, since the stirring blade 16 is already rotating around the rotary drive shaft 14 installed in the horizontal direction, the stirring force due to this rotation exists not only in the crushed plastic in the housing 13 but also in the hopper 11. The crushed plastic can also be agitated in the vertical direction, thereby preventing the so-called bridge phenomenon in which the crushed plastic in the hopper 11 stays in a state of being installed on both walls in the hopper. In the housing 13, the crushed plastic is gradually dropped from the lower end opening toward the screw conveyor 2 and supplied while being stirred in the vertical direction.

In the screw conveyor 2, the crushed plastic is heated by the friction between the conveyor case 21 and the screws 22, 22, and becomes a semi-molten state by this heating. It is kneaded efficiently and the heating means 33
And then hot-cut into granules to produce pellets.

[0012]

According to the present invention, since the crushed waste plastic is supplied to an apparatus for quantitatively and stably processing into granules, stable pellet quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of the entire apparatus.

FIG. 2 is a sectional view taken along line aa of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed-quantity supply means 11 Hopper 13 Housing 14 Rotation drive shaft 15 Support arm 16 Stirring blade 2 Conveying means (screw conveyor) 21 Conveyor case 22 Screw 3 Kneading extrusion means 33 Heating means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F201 AA50 AL00 BA01 BA02 BC02 BC12 BC17 BC25 BD05 BK02 BK15 BL09 BQ08 BQ22 BQ54 4F301 AC19 BA02 BA11 BA12 BA17 BA21 BB05 BC02 BC13 BC15 BD01 BD09 BE01 BG08 BG16 BG22 BG54

Claims (1)

[Claims] 1. A fixed-quantity feeding means having a hopper above, a conveying means connected to the fixed-quantity supply means, and a kneading and extruding means connected downstream of the conveying means. The supply means includes a hopper into which the crushed waste plastic is charged, a housing provided in communication with a lower portion of the hopper, a rotary drive shaft installed horizontally in the housing, and a rotary drive shaft. Agitating blades provided in a horizontal direction via a support arm in a radial manner, wherein the conveying means is a screw conveyor connected to a lower end opening of the housing, and the kneading / extruding means is fed from the screw conveyor. Plastic material to be mixed, heated, and sent to an apparatus for forming into granules. Place.