KR20010008099A - Reclamation process device for plastic - Google Patents

Abstract

PURPOSE: A regenerator of plastics is provided, which can regenerate as reusable plastics from gelation or swelled gel by mixing plastics and solvent with comparatively small-sized apparatus. CONSTITUTION: The regenerator of plastic comprises inputting device of raw materials, mainframe of disposal device and ejecting device. The mainframe of disposal device has cylinder-shaped disposal tank, screw that is parallel with the disposal tank and shaft center at the dawn position. The screw returns gelation because of having screw swings that has screw-shaped paddle in succession as length direction. At the mainframe, heating device is installed in the outer circumference of disposal tank and the inter side of shaft center of screw.

Description

Reclamation process device for plastic

FIELD OF THE INVENTION The present invention relates to a plastic recycling treatment apparatus used for treating waste in molded articles of plastics or plastic foam and recycling them into reusable plastics.

In general, plastics or plastic foams are used in containers and packaging of many articles ranging from various precision devices or foods that need to be kept warm or cold due to the advantages of excellent processability, cushioning, heat insulation and extremely light weight. However, these plastics are inconvenient for storage or transportation due to their large volume, and when disposed, they have many problems such as pollution due to odor and combustion gas generated during incineration. Japanese Patent Laid-Open No. 11-300740 discloses a polyethylene foam, a kind of plastic, which is irradiated with far-infrared rays to reduce the volume, and then pulverized again to form pellets and reused as a material for injection molding. The technique is clearly indicated. However, the rate of decrease in volume due to the irradiation of far-infrared rays is low, making transportation and the like uncomfortable.

From this point of view, the polyethylene foam is mixed with an organic solvent to form a gel, and the gel is subjected to a centrifuge to separate air and then vacuum filtered. However, in order to accommodate a large volume of polyethylene foam, the centrifuge has become large. Extremely large power is required to drive this, and temperature control is also difficult. In addition, the blockage of the media is severely low. Moreover, the polyethylene pellet obtained also has the fault which a large amount of organic solvents remain.

An object of the present invention is to provide a plastic recycling apparatus invented to solve the above-mentioned drawbacks of the prior art to obtain a high quality recycled plastic in a relatively compact device.

1 is a longitudinal cross-sectional view of the present invention;

2 is an internal cross sectional view of the present invention;

Figure 3 is a cross-sectional view of the raw material input device of the present invention

4 is a cross-sectional view of the injection apparatus of the present invention.

5 is a cross-sectional view of the crushing mixing device

〈Detailed description of the main parts of the drawings〉

DESCRIPTION OF SYMBOLS 1 Treatment tank 2 Screw body 3 Input nozzle

4: discharge nozzle 5: shaft 6: outlet

7: Return nozzle 8: Screw wing 9: Paddle

10: main body 15, 42: drive device 20: crushing mixing device

21 gelation tank 22 crushing screw 23 gel-like floating tank

30: raw material input device 31: saving tank 32: supply pump

35 connector 40 injection device 41 screw

43: injection nozzle 44: return piping 45: acceptance nozzle

46: return nozzle 51: hollow pipe 52: heating oil

The invention described in claim 1 is a regeneration treatment apparatus for regenerating as a plastic from a gelled substance (hereinafter simply referred to as a 'gelled substance') in a gelled or swollen state by mixing the plastic with a solvent, and the electric regeneration treatment apparatus is a raw material. It is equipped with an input device and a processing device body for evaporating solvent from gel material, and an injection device for injecting recycled molten plastic. An electric screw body is provided with an input nozzle for supplying the gel material installed at the end, a return nozzle for supplying the gel material not recycled as plastic to the electric treatment tank again, and a discharge nozzle installed at the end downstream of the electric treatment tank. Parallel to the axis and in the downwardly biased position with the axis in the longitudinal direction Which it is characterized by having a screw blade which gave a stirring function of a spiral.

The plastic gel-like substance dissolved in the solvent is introduced into the processing apparatus main body through the nozzle from the raw material input device, and is stirred while being conveyed inside the processing tank and sent to the injection apparatus.

Moreover, since the electric screw body has an axis center parallel to the axis center of a process tank body, and has a shaft centered downward, the gel-like thing is stirred under the process tank, and the upper part of a process tank has a predetermined space.

Invention of Claim 2 has the plate-shaped paddle in which the electric screw blade | wing was provided in the outer peripheral part at a predetermined angle, The gel-like object is stirred and conveyed by rotation of an electric screw body, It is characterized by the above-mentioned.

The plate-shaped paddle provided at a predetermined angle on the outer circumference of the screw blade can scrape off the gel-like material that is likely to stay at the bottom of the treatment tank and stir well.

The invention of claim 3 is characterized in that a plurality of recovery ports are provided in the electric treatment tank for reducing the pressure of the solvent vapor generated from the gelled material.

The vapor of the solvent taken out from the recovery port is cooled to the original liquid state, and can be reused as a solvent.

In this way, since the solvent is recycled and does not leak to the outside, it can be a device that considers the environment.

The invention of claim 4 is characterized in that the electric injection device conveys a screw for compressing the molten plastic recycled from the gelled plastic, a nozzle for ejecting the plastic in the molten state, and a gel material which cannot be recycled with the plastic to the electric return nozzle. A molding machine (not shown) for forming an injection-molded plastic with a conveying nozzle is detachably attachable.

As a result, the molten plastic taken out from the injection apparatus is a plastic that contains little solvent and is deformable, so that it can be injected from the injection apparatus, reformed into a free form, and made available.

In addition, the gelled material that could not be recycled by plastic can be returned from the conveying nozzle back to the treatment tank and the same process can be repeated.

The invention of claim 5 is characterized in that the conveying pipe, the electric treatment tank, and the electric screw body, which are connected between the electric conveying nozzle and the electric return nozzle, have a heating device and a temperature control device is attached to the heating device to heat the gelled material. It is done.

This heating device can heat and evaporate the solvent in which the plastic was dissolved.

As the temperature control device can set the temperature appropriately according to the properties of the various plastics and the solvent used, the gelled material is separated as the molten plastic containing little solvent just before entering the injection device.

In addition, since the heating device is provided in the conveying pipe which is connected between the electric conveying nozzle and the electric return nozzle, the gelled material which has not been separated into plastic is heated and returned to the treatment tank once again.

The heating device installed in the conveying pipe can heat and convey the gelled material to quickly evaporate the solvent, thereby reducing the load inside the treatment tank.

The invention according to claim 6 is characterized in that the electric heating device is attached to at least one of the outer circumference of the electric conveying pipe, the outer circumference of the electric treatment tank, and the inside of the shaft center of the electric screw body.

The heating means attached to the locations of these urgings allows the gelled material to be heated with high efficiency to be recycled as a plastic containing almost no solvent.

According to the invention of claim 7, the electrical raw material input device comprises a storage tank for storing the gelled material, a supply pump for supplying the gelled material, and a connection pipe to the electric input nozzle, and the crushing and mixing device for crushing the plastic and mixing with the solvent is removable. It is characterized in that the mounting possible.

The discarded plastic becomes a gel material in a crushing mixing device which is crushed and mixed with a solvent. The raw material input device can receive the gel material supplied from the crushing mixing device in a storage tank and supply the required amount to the main body of the processing apparatus.

Example

Plastics that can be recycled by the plastic recycling apparatus of the present invention are thermoplastic plastics such as polycarbonate, polyacetal, polyamide, polymethyl methacrylate, ABS, polypropylene, polyethylene, polystyrene, polyester and the like. As a variety of plastic foam containers, building materials, sheet body, medical, film, etc., many of these plastic waste is recycled, the waste problem is greatly improved.

The plastic recycling apparatus of the present invention will be described in detail with reference to the drawings. 1 is a cross-sectional view showing the processing apparatus main body 10 of the plastic recycling apparatus of the present invention.

This processing apparatus main body 10 is equipped with the processing tank 1 of a substantially cylindrical shape.

At the upper end of the processing tank 1, an injection nozzle 3 for introducing a plastic gel-like material into the processing tank 1 is provided.

In addition, a plurality of outlets 6 for recovering the vapor of the solvent generated during the treatment are provided in a plurality of suitable places in the upper portion of the treatment tank 1.

At the downstream end of the treatment tank 1, the lower part is provided with a discharge nozzle 4 which is treated with gelled material and is discharged as plastic in a molten state.

In addition, when the gelled material is not regenerated by plastic, a return nozzle 7 having the gelled material returned to the treatment tank 1 is provided adjacent to the injection nozzle 3.

Inside the processing tank 1, the screw body 2 which is parallel to the axial center of the processing tank 1, and has the shaft center 5 below is provided, This screw body 2 rotates by a drive apparatus.

As shown in the drawing, a spiral screw blade 8 having a continuous stirring function and a conveying function of a predetermined pitch is mounted on the shaft 5 of the screw body 2.

Moreover, the outer peripheral part of this screw blade 8 is provided in predetermined angle, Preferably, the paddle 9 of a shape is provided.

It is preferable that this plate-shaped paddle 9 be installed almost upright on the outer peripheral part of the screw blade 8, whereby the gelled material can be stirred well.

2 is a side cross-sectional view showing the interior of the processing apparatus main body 10 of the plastic recycling apparatus of the present invention.

The screw body 2 is provided at a position in which the shaft center 5 is eccentrically lower than the shaft center of the treatment tank 1, and is to be driven to rotate in a predetermined direction by the power from the drive device 15. .

A spiral screw blade 8 having a stirring function and a conveying function is attached to the shaft center 5 of the screw body 2.

Moreover, the outer periphery of this screw blade 8 is equipped with the plate-shaped paddle 9 installed substantially upright, and rotates like a circular arc around the shaft center 5 in the outer periphery of the screw body 2.

A heating device is attached to the outer circumference of the treatment tank 1, the inner axial center of the screw body 2, and the outer circumference of the conveying pipe (not shown).

The heating apparatus is not particularly limited, and for example, as shown in FIG. 1, the heating oil 52 is circulated through the hollow pipe 51 and the inner core 5 of the screw body 2 is passed through the shaft core ( 5) is a device for heating.

In addition, the heating apparatus circulates the heating oil 52 of the same type through the hollow pipe 51 which has rotated the outer circumference of the processing tank 1 and the outer circumference of the conveying pipe, thereby heating the processing tank 1 and the conveying pipe.

As another type of heating device (not shown), it is possible to make a heating device for circulating steam or using a heating coil, or to cover a predetermined place and heat it by flowing a heating fluid therein.

The inside of the treatment tank 1 is stably heated and temperature-controlled by such a heating device, so that the gelled material can be appropriately heated according to two kinds.

Moreover, when the high temperature oil flows and circulates from the downstream of the processing tank 1, the temperature of a gel-like thing rises gradually, and a gelled material can be heated suitably on such conditions.

3 is a view showing a raw material input device 30.

This raw material input device 30 is composed of a saving tank 31 for temporarily saving the gel-like material, and a connecting pipe 35 to the supply pump 32 and the input nozzle 3 to be attached to and detached from the processing apparatus main body 10. I can attach it.

In the case of supplying the gel-like material into the processing tank 1, the connection pipe 35 is carried out through the injection nozzle 3 of the processing tank 1.

4 is a view showing the injection device 40.

The injection device 40 includes a suction nozzle 45 for receiving the molten plastic from the treatment tank 1, a screw 41 for compressing the melt, and a drive device 42 for driving the screw 41 and the like. An injection nozzle 43 for injecting the melt to the outside is provided.

The injection apparatus 40 can be detachably attached to the processing apparatus main body 10 by opening the discharge nozzle 4 provided in the downstream end part of the processing tank 1.

The injection apparatus 40 is attached to the processing tank 1 so that the molten plastic separated from the solvent in the processing tank 1 is injected from the injection nozzle 43 to the outside.

An injection molding machine (not shown) is detachably attached to this injection apparatus 4, so that molten plastic can be molded into various shapes and taken out.

In addition, the injection apparatus 40 is provided with the nozzle 46 which conveys a gel-like thing to the processing tank 1 again when it is not recycled as a plastic from the gel-like thing in the processing tank 1 again.

The gelled material discharged from the conveying nozzle 46 is heated in the conveying piping 44 and sent to the return nozzle 7 of the treatment tank 1.

5 is a view showing the shredding mixing device 20.

The gelled material of the plastic to be put into the plastic regeneration treatment device of the present invention is gelled in the shredding mixing device 20 shown in the drawing using a solvent that melts and floats the plastic.

The crushing mixing apparatus 20 is composed of a cylindrical gelling tank 21, a crushing screw 22 provided at the center of the gelling tank 21 and a gel-like floating tank 23 connected to the gelling tank 21.

The flux is filled in the gelation tank 21 and the gelation floatation tank 23 in predetermined amounts, respectively.

When the discarded plastic is put into the crushing mixing device 20 configured as described above, the crushing screw 22 pulverizes such waste finely and compresses the crushed product with the solvent.

As a result, the plastic becomes a gelled product which floats in the gelated flotation tank 23 connected to the gelation tank 21.

This flotation material is picked up from the upper part of the gelation flotation tank 23, and is thrown into the raw material input device 30 of a plastic regeneration processing device.

As a solvent used for this crushing mixing apparatus 20, the solvent which melt | dissolves in a gel form and the solvent which melt | dissolves in a gel form may be sufficient as the solvent which makes plastics a gel-like thing, and segregates.

As the solvent, any solvent capable of melting methylene chloride, carbon tetrachloride, limonene, ester of dibasic, for example dimethyl glutarate, dimethyl azifinate, dimethyl succinate or other plastics can be used. Alternatively, a foamed polystyrene solvent sold by Medicix Co., Ltd. under the trade name 'Ecosolve' may be used.

The gel-like material of the plastic produced in the raw material input device 30 is introduced into the processing tank 1 from the input nozzle 3 of the processing device main body 10.

In this way, the gelled material introduced into the treatment tank 1 is superheated while being well stirred in the screw body 2 to separate the solvent as steam.

In addition, a pressure reducing device is attached to the outlet 6 provided in the upper portion of the treatment tank 1, whereby the inside of the treatment tank 1 is depressurized, and the vapor of the solvent is more effectively separated from the plastic.

The molten plastic in which the solvent is separated as a vapor moves to the injection device 40 in a state where the solvent is almost not mixed therein.

The vapor of the solvent recovered from this outlet 6 is cooled, returned to the liquid, and reused repeatedly. As the solvent is recycled and does not leak to the outside, it can be an environment-friendly device.

Since the molten plastic extruded from the injection device 40 has already been removed from the solvent, it can be easily cut into pellets using a conventional method, for example, extruded and cooled in water, and then using a rolling cutter or the like.

As described above, the plastic regeneration treatment apparatus of the present invention can be recycled as a plastic while heating the plastic, which is mixed with a solvent and becomes a gel, at an appropriate heating temperature according to the type and the kind of the solvent used.

Since a screw body has a screw blade and a paddle, it can stir while conveying a gel material, and can evaporate a solvent well from a gel material.

In addition, since the screw body is stirred under the treatment tank, the solvent evaporated above the treatment tank is recovered from the recovery port and cooled, and is almost 100% recycled, thereby making it an environment-friendly apparatus.

In addition, the plastic recycling apparatus of the present invention can reduce the size of the entire apparatus and can be mounted on a vehicle and processed out of a plastic waste generating place.

The molten plastic that is injected from the injection device is a device that makes the plastic almost 100% recyclable because it is re-formed and reused in a free form.

Claims (7)

A processing apparatus for regenerating as a plastic from a gelled product in a gelled or swollen state by mixing the plastic with a solvent. The electric regeneration processing apparatus is a raw material input device and a processing apparatus body for evaporating a solvent from the electrical gelled material and a recycled molten plastic. The main body of the electric processing apparatus has a cylindrical processing tank, a screw body provided inside the electric processing tank, an injection nozzle for supplying an electric gel-like material installed at an end upstream of the electric processing apparatus, and is not recycled with plastic. And a return nozzle for supplying the gelled material to the electrolytic treatment tank again, and a discharge nozzle disposed at the downstream end of the electrolytic treatment tank, wherein the electroscrew body is parallel to the axis of the treatment vessel body and has an axis centered downward. At the same time, it has a screw blade that has a continuous spiral stirring function in the longitudinal direction Plastic reproduction processing apparatus, characterized in that. The plastic regeneration treatment apparatus according to claim 1, wherein the screw blade has a plate-shaped paddle provided at a predetermined angle on an outer circumference thereof, and agitates and conveys the electric gel-like article by rotation of the electric screw body. The plastic regeneration treatment apparatus according to claim 1 or 2, wherein the treatment tank is provided with a plurality of recovery ports for decompressing and recovering the vapor of the solvent generated from the electric gelled material. The injection apparatus according to any one of claims 1 to 3, wherein the injection apparatus is a screw for compressing the molten plastic recycled from the electrogelled plastic, an injection nozzle for injecting the plastic in the molten state, and the plastic could not be recycled into the plastic. A plastics recycling processing apparatus comprising a conveying nozzle for conveying an electric gelled material to an electric return nozzle, wherein a molding machine for molding an injected molten plastic can be detachably mounted. The conveying piping, the electric treatment tank, and the electric screw body installed in connection between the conveying nozzle and the electric return nozzle have a heating device, and a temperature control device is attached to the heating device. A plastic regeneration processing apparatus, characterized in that for heating an electric gelled material. 6. The plastic regeneration treatment apparatus according to claim 5, wherein the heating device is mounted at at least one of the outer circumference of the electric conveying pipe, the outer circumference of the electric treatment tank, and the inside of the shaft center of the electric screw body. 7. The raw material input device according to any one of claims 1 to 6, wherein the raw material input device comprises a storage tank for storing the electric gelled material, a supply pump for supplying the electric gelled material, and a connection pipe to the electric input nozzle. A plastic recycling treatment apparatus, characterized in that the crushing mixing device mixing with the solvent is detachably attachable.