JP3228599B2 - Method and apparatus for recycling resin parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for recycling resin parts, in particular, painted or plated resin parts.

[0002]

2. Description of the Related Art In recent years, recycling of end-of-life vehicles has attracted attention in the field of the automobile industry due to increasing concerns about environmental issues and recycling. In ordinary cars, about 75% of its weight is dismantled and reused as scrap iron and non-ferrous metal.
The remaining about 25% is treated as industrial waste, and this waste contains about 3% by weight of resin parts together with fibers, rubber, etc.
0% is contained.

As shown in FIG. 9, a resin component, for example, a skin of a bumper generally has a coating w4 formed on a base material w3 of a thermoplastic resin such as a polypropylene resin as shown in FIG. . The type of the resin of the coating film w4 is a thermosetting resin, for example, an amino polyester type, an amino acrylic type, a polyester urethane type, or an acryl urethane type resin. A crosslinked structure is provided by the process. This is because of its strong and dense structure, the coated resin bumper has excellent chemical resistance, heat resistance, scratch resistance, weather resistance and surface gloss.

However, when the bumper is crushed and pelletized to obtain a material, a coating film piece is mixed with the polypropylene material. In the molding process using the polypropylene material mixed with the coating film piece, the coating film piece is melted. This impairs the fluidity of the resin and causes molding defects such as "burn", "weld mark", and "bubbles" in the molded product. Further, the coating film pieces that have emerged on the surface of the molded article have problems such as impairing the appearance of the product.

[0005] Further, since there is almost no interaction between the coated film piece and the polypropylene resin serving as the base range, the coated film piece becomes rather a "foreign substance" and deteriorates the mechanical properties of the molded article. For example, the impact strength of a recycled polypropylene material mixed with a coating film piece is about 80% of that of virgin polypropylene.

For this reason, it is necessary to remove the coating when recycling the coated resin parts.

[0007] As a method of removing a coating film, there is a method disclosed in Automotive Technology Vol. 46. No5,1
992. It is classified into mechanical, physical and chemical methods as disclosed on pages 3-9.

[0008] The mechanical coating film removing method is, for example, a shot blast method in which an abrasive is sprayed on the coating film using compressed air to remove the coating film, or a coated resin component is roughly pulverized and then finely pulverized. There is a screen mesh method or the like in which a coating film piece mixed without being melted by filtering through a mesh under heating and melting is removed.

The shot blasting method is excellent in toxicity and environmental safety because the coating film is removed by friction, impact, etc., but requires a large amount of processing time, and the coating film removing efficiency is not sufficient. Processing is difficult. The screen mesh method is also excellent in toxicity and environmental safety because the coating film pieces are removed by filtration, but has disadvantages such as a long processing time and insufficient coating film removal efficiency.

[0010] The physical coating film removing method uses a halogen-based solvent or various organic solvents, and removes the coating film by utilizing the solvent permeation into the interface between the coating film and the substrate and the swelling phenomenon of the coating film by the solvent. This is inferior in environmental safety, the coating film removal efficiency and the processing ability are relatively low, and there is a possibility that the substrate may be deteriorated.

[0011] Since these mechanical and physical coating film removal methods have low coating film removal efficiency, molded articles using the same have low appearance and mechanical properties of products, and their application range is greatly limited.

As a method of chemically removing the coating film, for example, there is an organic salt method in which the coating film is chemically decomposed and removed by cutting an ether bond near a crosslinking point of the coating resin with a mixed solution of ethanol and water containing an organic salt. .

This method has problems in secondary treatment such as wastewater treatment, and has problems such as low treatment efficiency and inefficiency. Further, even a plated resin product has problems such as difficulty in removing the plated layer from its efficiency, processing ability, and obtaining high quality recycled resin parts.

[0014]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a high quality recycled resin part which is excellent in the efficiency of removing a coating film or a plating layer, environmental safety and processing ability. To provide a recycling method and apparatus.

[0015]

According to the present invention, there is provided a method of recycling a resin part, which comprises the steps of: crushing a coated or plated resin part to obtain a coarse crushed material; A coarse separation step of heating and melting the base resin to separate and remove coarse coating pieces or coarse plating pieces to obtain a molten material, and extruding the molten material with an extruder to form a coating piece or plating on the base resin. An extrusion step of obtaining a strand-shaped or film-shaped extruded material in which pieces are mixed, a rolling and stretching step of rolling and stretching the extruded material to obtain a film-shaped rolled material, and pulverizing the rolled material to form a finely pulverized material. And a separation step of separating the finely pulverized material into a base resin component and a coating film piece or a plating piece component. A coarse pulverizing step of obtaining a coarsely pulverized material, and a coarse separation step of heating the coarsely pulverized material and separating and excluding a coarse coating film piece or a coarse plated piece in a state where the base resin is melted to obtain a coarsely separated material, A blow step of obtaining a tubular blown material in which the molten material is mixed with a coating film piece or a plated piece in a base resin by an inflation method, and a rolling and stretching step of rolling and stretching the blown material to obtain a film-shaped rolled material. And a separation step of separating the finely pulverized material into a base resin component and a coating film piece or a plating piece component. On the other hand, the resin component recycling apparatus according to the present invention includes a coarse pulverizing apparatus for pulverizing a coated resin part to obtain a coarse pulverized material, and a coarse coating film piece in a state where the coarse pulverized material is heated to melt the base resin. A coarse separation device that separates and eliminates a coarse plating piece to obtain a coarse separation material, and heats and extrudes the coarse separation material to obtain a strand-like or film-like extruded material in which a coating film piece or a plating piece is mixed into a base resin. An extruding apparatus, a rolling and stretching apparatus for rolling and stretching the extruded material to obtain a rolled material in the form of a film, a fine pulverizing apparatus for pulverizing the rolled material to obtain a finely pulverized material, and a base resin comprising the finely pulverized material. And a separating device for separating the coated part or the plating piece constituting part, a coarse crushing apparatus for crushing the coated resin part to obtain a coarse crushed material, and heating the coarse crushed material. Base resin A coarse separation device that separates and eliminates a rough coating piece or a coarse plating piece in a molten state to obtain a coarse separation material, and a tube-like shape in which the coating piece or the plating piece is mixed into a base resin by the inflation method. Apparatus for obtaining a blown material, a rolling and stretching step of rolling and stretching the blown material to obtain a rolled material in the form of a film, a fine pulverizing apparatus for pulverizing the rolled material to obtain a finely pulverized material, A separating step of separating the material into a base resin constituent part and a coating film piece or a plating piece constituent part.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method and an apparatus for recycling resin parts according to the present invention will be described by taking as an example a case where a coated resin bumper, which is a large part among automobile resin parts, is collected and recycled.

FIG. 1 is a schematic explanatory view of a method and an apparatus for recycling resin parts in this embodiment, and FIG. 2 is a flowchart showing each step.

In the figure, w is removed from a scrapped vehicle and collected.
It is a coated resin bumper with a metal part removed, and on a thermoplastic base material such as polypropylene resin, amino polyester type, amino acrylic type, polyester urethane type,
The coating film is formed of a thermosetting resin such as an acrylic urethane resin.

Reference numeral 1 in the drawing denotes a coarse crushing device such as a cutter mill having a screen of about 4 mm for crushing the coated resin bumper w to obtain a coarsely crushed material wa.

The coarsely crushed material wa produced by the coarse crushing apparatus 1
Is supplied to the coarse separation device 2. The coarse separation device 2 has, for example, as shown in the figure, a frame-shaped container 2b and a heating device 2c that are rotationally driven by a rotation driving device 2a, and the thermoplastic resin of the coarsely crushed material wa put into the container 2b. The base resin, that is, the base resin is heated and melted by the heating device 2c, and the container 2b is rotationally driven to relatively separate the base resin and the coating film piece made of the thermosetting resin by utilizing the difference in specific gravity. A centrifugal separator for centrifuging large pieces of coating, or heat-melting the coarsely crushed material wa, filtering through a mesh and separating the coating of thermosetting resin mixed without melting into the base resin And a separation device using a screen mesh method.

The coarse separation material obtained by the coarse separation device 2 is supplied to a hopper 3a of an extruder 3. The extruder 3 is a hopper 3
The coarse separation material charged in a is heated by a band heater or the like as the screw 3b rotates. It is configured to soften and mix while advancing in the barrel 3c and extrude from a die 3e such as a porous die or a T die to produce a strand-like or film-like extruded material wb. And restricting the flow to the die 3e so that the barrel 3
The filter mesh 3d which raises the pressure in c, improves the kneading degree, and performs a rectifying function is provided.

On the downstream side of the extruder 3, an extruded material wb in which a thermosetting resin film piece that has not been removed by the coarse separation device 2 is mixed into a thermoplastic resin base resin extruded by the extruder 3. A rolling and stretching device 4 for rolling and stretching is provided. The rolling and stretching device 4 includes a pair of upstream rollers 4a provided on the upstream side, and a pair of downstream rollers 4b provided on the downstream side and driven to rotate at a peripheral speed greater than the peripheral speed of the upstream roller 4a. A heating means 4c is provided between the upstream roller 4a and the downstream roller 4b, and the strand-shaped or film-shaped extruded material wb is provided between the upstream roller 4a and the downstream roller 4b. Is heated to a temperature at which it is plasticized, stretched, and rolled to obtain a film-shaped rolled material wc.

In the drawing, reference numeral 5 denotes a fine pulverizing device for pulverizing the rolled material wc produced by the rolling and stretching device 4 to obtain a finely pulverized material wd. The finely pulverized material wd obtained by the fine pulverizing device 5 is pin milled. And a portion wf forming the coating film are separated by a separation device 6 such as a separator or a specific gravity separator, and the pulverized material excluding the coating film forming portion is heated and melted to form a pellet we. Is manufactured, and a resin product such as a bumper is obtained again.

Next, a method for recycling a resin component using the resin component recycling apparatus thus configured will be described with reference to the flowchart of FIG.

The collected resin bumper w from which the metal portion has been removed is pulverized by a coarse pulverizing device 1 such as a cutter mill in a coarse pulverizing step 1s to become a coarse pulverized material wa. The coarsely crushed material wa has a base material made of a thermoplastic resin, that is, a base resin w1 as shown in FIG.
A large number of coating film pieces w2 made of a thermosetting resin adhere to the substrate.

The coarsely crushed material wa produced by the coarse crushing apparatus 1 in the coarse crushing step 1s is charged into the coarse separation apparatus 2, for example, a vessel 2b of a centrifuge shown in FIG. And heating and melting the base resin made of a thermoplastic resin by the heating device 2c,
b is rotationally driven by the rotary driving device 2a to separate and remove the thermosetting resin film pieces mixed into the base resin to obtain a coarse separation material.

The coarse separation material produced in the coarse separation step 2s is fed into the hopper 3a of the extruder 3 in the next extrusion step 3s, and the coarse pulverized material wa fed into the hopper 3a is heated as the screw 3b rotates. Then, while advancing in the barrel 3c, the mixture is softened and mixed to be in a fluid state, and is continuously extruded from a die 3e provided at the tip of the extruder 3 to become a strand-like or film-like extruded material wb.

As shown in FIG. 4A, a plan view of the extruded material wb and a cross section taken along line aa of FIG.
1 has relatively large coating film pieces w2.

The extruded material wb is rolled and stretched by the rolling and stretching device 4 in the subsequent rolling and stretching step 4s.

That is, the extruded material w extruded from the extruder 3
b is rolled by the upstream roller 4a and the downstream roller 4b of the rolling and stretching device 4, respectively, and heated to a temperature equal to or lower than the melting point of the base resin w1 by the heating means 4c to be plasticized. Downstream roller 4b
Between the upstream roller 4a and the downstream roller 4b
The film is stretched in the flow direction according to the difference in peripheral speed between the two.

The extruded material wb at the downstream position 4d of the upstream roller 4a is, as shown in the plan view of FIG. 4B and the sectional view taken along the line bb of FIG. The coating film pieces w2 mixed in the base resin w1 are crushed and pulverized. Furthermore, since the base resin w1 is a thermoplastic resin, it is softened by heating, becomes fluid, and is easily stretched, whereas the coating film piece w2 is not stretched because it is a thermosetting resin. Therefore, the coating film piece w with respect to the elongation of the base resin w1.
No. 2 cannot follow, cracks or cracks are easily generated between them, and separation becomes easy.

The stretching of the base resin w1 in the direction perpendicular to the stretching direction is reduced due to stretching, and the base resin w1 is easily torn.

The extruded material wb stretched between the upstream roller 4a and the downstream roller 4b is rolled by the downstream roller 4b, and the coating film w2 mixed into the base resin w1.
Is crushed to form a film-shaped stretched material wc which is further finely pulverized as shown in a plan view in FIG. 4C and a cross-sectional view in FIG.

The film-shaped stretched material wc composed of the base resin w1 including the finely pulverized coating film pieces w2 is subjected to the following fine pulverization step 5s by the fine pulverizer 5, for example, about 20 to 3 mm in diameter.
Finely pulverized to about 0 μm. In the case of the fine pulverization, a large coating piece w2 is removed in advance in the coarse separation step 2s, and the coating piece w2 is finely divided in the rolling and stretching step 4s, and between the base resin w1 and the coating piece w2. Cracks are easily generated or torn, and the strength of the base resin w1 is reduced and the base resin w1 is easily torn.
Without binding to 2, finely ground material of the state where the milling material is mixed in finely ground material and Nurimakuhen w2 so-called base resin w1 wd
Is obtained very efficiently.

Finely pulverized material obtained in the finely pulverizing step 5swd
In the next separation step 6s, a pin mill, specific gravity separator, etc.
Constitutes the base material of the bumper w.
The constituent parts of the base resin w1 and the coating that constituted the coating film
It is separated into constituent parts wf of the film piece w2. Before separation
Of the base resin w1 and the coating film piece w2 in the fine pulverizing step 5s.
Finely ground material without bondingwdIs very good because
It can be separated into

From the finely pulverized material wd from which the constituent parts wf of the coating film piece w2 have been separated and removed, a high-purity pellet we containing almost no coating film piece w2 is obtained in the next pelletizing step 7s. A recycled product wg is obtained by the commercialization process 8s.

In the recycled product wg, since the coating film pieces w2 are sufficiently separated and the produced pellet we are used as a raw material, molding defects such as "weld marks" and "bubbles" and appearance are not impaired. Further, a high quality product comparable to a product made of a virgin material having excellent impact strength without loss in mechanical properties is possible.

Further, the rolled material wc obtained in the rolling and stretching step 4s is obtained.
Without being immediately crushed in the fine crushing step 5s,
By storing c in a roll form and storing it as a material in a roll state or in a stacked state, it is possible to reduce the storage volume as compared with storing in a crushed material state or a pellet state. In this case, the storage volume can be reduced to 1/2 to 1/3 as compared with storage in a crushed state.

In the above embodiment, the extruded material wb extruded from the extruder 3 by one rolling and stretching device 4 is rolled and stretched to obtain a film-shaped rolled material wc. It is also possible to provide a rolled material wc by repeating the rolling and stretching of the extruded material wb an appropriate number of times.

Further, the rolled material wc obtained in the rolling and stretching step 4s is obtained.
Without being immediately crushed in the fine crushing step 5s,
By storing c in a roll form and storing it as a material in a roll state or in a stacked state, it is possible to reduce the storage volume as compared with storing in a crushed material state or a pellet state. In this case, the storage volume can be reduced to 1/2 to 1/3 as compared with storage in a crushed state.

FIG. 5 is a schematic explanatory view showing another embodiment of a method and an apparatus for recycling resin parts according to the present invention. In FIG. 5, parts corresponding to those in FIG. Although not shown, reference numeral 7 in the figure denotes a rolling and stretching apparatus for rolling and stretching the extruded material wb extruded into a strand or a film by the extruder 3 to obtain a film-shaped rolled material wc.

The rolling and stretching apparatus 7 performs a rolling and stretching step 4s.
And a pair of upstream rollers 7 provided on the upstream side
a, a downstream roller 7b provided on the downstream side, and a cooling means 7c disposed between the upstream roller 7a and the downstream roller 7b, and having a peripheral speed higher than the peripheral speed of the downstream roller 7b. It is configured to be driven to rotate at a speed.

The operation of the rolling and stretching apparatus 7 is as follows.
Strand-like extruded material wb obtained in s
Is rolled by the upstream roller 7a to crush the coating piece w2, and is cooled by the cooling means 7c to a temperature equal to or lower than the embrittlement temperature of the coating piece w2 to break the coating piece w2 brittlely. Further, the extruded material wb is stretched by the difference in the peripheral speed between the upstream roller 7a and the downstream roller 7b, and the base resin w1 and the coating film w2
Between them and cracks are easily generated.

The extruded material wb stretched in this way is rolled by the downstream roller 7b, and the coating film piece w2 mixed into the base resin w1 is finely crushed to form a film-shaped stretched material wc.

When the stretched material wc is pulverized by the pulverizing device 5 in the next pulverizing step 4s, the coating film piece w2 is previously brittlely broken in the rolling and stretching step 3s, and the base resin w1 and the coating resin piece w A crack is easily generated or torn at the joint portion of w2, and further, the base resin w1 is easily torn, so that a finely pulverized material wd in which the coating film piece w2 does not adhere to the base resin w1 can be obtained very efficiently. As a result, the fractionation in the fine separation step 6s is improved, and the production of a high-quality recycled product wg becomes possible as in the above embodiment.

In this embodiment, similarly to the above embodiment, a plurality of rolling and stretching devices 7 may be provided so that the extruded material wb is subjected to rolling and stretching several times as appropriate to obtain a rolled material wc. is there.

FIG. 6 is an external explanatory view showing still another embodiment of the method and apparatus for recycling resin parts according to the present invention, and FIG. 7 is a flowchart thereof.

1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2, and detailed descriptions thereof will be omitted.
Is used in a blowing step 8s following the coarse separation step 2s,
This is a blow device for producing a tubular blow material wh by an inflation method using the coarse separation material produced by the coarse separation device 2 as a material.

[0049] The blowing device 8 uses the coarsely pulverized material charged into the hopper 8a by rotating the screw 8b to form a barrel 8c.
The inside of the barrel 8 is heated by a hand heater or the like.
c, while softening and mixing, the thin tube is extruded from an inflation die 8d such as a crosshead die, the upper pair is pinched by a pinch roll 8e, and a gas such as air is fed into the balloon, thereby ballooning a predetermined amount. It is configured to continuously produce a tube-shaped blown material wh by rotating the pinch roll 8e while inflating and stretching the same.

The blow material wh stretched thinly in advance in the blowing step 9s is rolled in the next rolling and stretching step 3s in the same manner as in the above embodiment.

FIG. 8 shows still another embodiment of a method and an apparatus for recycling resin parts according to the present invention, in which parts corresponding to those in FIG. Instead of the extrusion step 3s of the embodiment shown in FIG. 5 and the extrusion apparatus 3 used in the extrusion step 3s, it is possible to provide a blowing step 9s and a blowing apparatus 8 similarly to the above-described embodiment.

In the above description, in the rolling and stretching step 4s, when the extruded material wb or the blown material wh is stretched, heating or cooling is performed. However, the heating and cooling may be omitted to simplify the apparatus and control. It is possible.

Further, the case where the coated resin bumper is collected and recycled has been described as an example. However, the present invention is not limited to this. For example, a resin product in which a thermosetting resin is coated on another thermoplastic resin, or a thermoplastic resin is used. Even a plated resin product or the like can be recycled by a similar method or apparatus.

More specifically, in the coarse pulverizing step, the coarsely pulverized resin component is coarsely pulverized by a coarse separation device to produce a coarsely pulverized material.
In the next extrusion step 2s, the coarsely separated material obtained by separating the coarsely-plated pieces by the coarsely separating apparatus 2 is heated and extruded by the extruder 3 in the next extrusion step 2s to form a strand or film-like extrusion in which the plated pieces are mixed into the base resin. Material or blow process 9
In step s, a blowing material is obtained by the blowing device 8. Next, the extruded material or the blown material is subjected to a rolling and stretching device 4 in a rolling and stretching step 4s.
Alternatively, the material is rolled and stretched into a film by 7 and the rolled material is obtained by the fine grinding device 4 in the fine grinding step 4s. This finely pulverized material is removed in a separation step 6s by a separation device 6 by a plating device, and a pelletization step
s, and a recycled product can be obtained by the product process 8s.

[0055]

According to the method and apparatus for recycling resin parts described above, the coated or plated resin parts are roughly pulverized, and the coarsely pulverized material is separated into coarse coating pieces in advance. The extruded material is extruded into a strand or a film by an extruder, or the blown material formed into a film by a blower is rolled and stretched to crush and shrink the coating film or the plating, and to refine the base resin and the coating film. By facilitating the separation of the coating or plating layer, the next pulverization is facilitated, and a finely pulverized material having no connection between the base resin and the coating or plating piece is obtained. This makes it possible to obtain high-quality recycled resin parts with extremely high removal efficiency, and because there is no need to use solvents, etc., compared to conventional methods for removing coatings or plating layers, toxicity and environmental safety are reduced. Excellent sex, and have equal present invention unique effect excellent in processing capability, in which a large made to contribute to the recycling of plastic parts with a wide field.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a method and an apparatus for recycling resin parts according to the present invention.

FIG. 2 is a flowchart showing each step.

FIG. 3 is an explanatory view showing a cross section of a coarsely crushed material obtained by crushing a resin component.

FIG. 4 is an explanatory view showing a state of a coating film piece mixed into a base resin in a rolling and stretching step.

FIG. 5 is a schematic explanatory view showing another embodiment of a method and an apparatus for recycling resin parts according to the present invention.

FIG. 6 is a schematic explanatory view showing still another embodiment of a method and an apparatus for recycling resin parts according to the present invention.

FIG. 7 is a flowchart showing each step.

FIG. 8 is a schematic explanatory view showing still another embodiment of a method and an apparatus for recycling resin parts according to the present invention.

FIG. 9 is a cross-sectional view of a coated resin bumper.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Coarse crusher 2 Coarse separator 3 Extruder 4 Rolling and stretching device 5 Fine crusher 6 Separation device 7 Rolling and stretching device 8 Blow device 1 s Coarse crushing process 2 s Coarse separation process 3 s Extrusion process 4 s Rolling and stretching process 5 s Fine crushing process 6 s Separation Process 9s Blowing process w Painted resin parts (bumper) wa Coarse pulverized material wb Extruded material wc Rolled material wd Finely pulverized material we Pellets wg Recycled product (bumper) wh Blow material

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29B 17/00

Claims (8)

(57) [Claims] 1. A coarse pulverizing step of pulverizing a coated or plated resin part to obtain a coarse pulverized material, and heating the coarse pulverized material to form a coarse coated film piece or a coarse plated piece in a state where the base resin is melted. A coarse separation step of separating and removing to obtain a molten material,
An extrusion process of extruding the molten material by an extruder to obtain a strand-shaped or film-shaped extruded material in which a coating film piece or a plating piece is mixed into a base resin, and rolling and stretching the extruded material to form a film-shaped rolled material A rolling and stretching step to obtain, a pulverizing step of pulverizing the rolled material to obtain a finely pulverized material, and a separating step of separating the finely pulverized material into a base resin component and a coating film piece or a plating piece component. A method for recycling resin parts, characterized in that: 2. A coarse pulverizing step of pulverizing a coated or plated resin component to obtain a coarse pulverized material, and heating the coarse pulverized material to form a coarse coated film piece or a coarse plated piece in a state where the base resin is melted. A coarse separation step of separating and eliminating a coarse separation material, a blowing step of obtaining a tubular blown material in which a coating film piece or a plating piece is mixed into a base resin by the inflation method, and rolling the blown material. And a stretching step of stretching to obtain a rolled material in the form of a film, a pulverizing step of pulverizing the rolled material to obtain a finely pulverized material, and forming the finely pulverized material into a base resin component and a coating film piece or a plating piece. And a separation step of separating the resin parts into parts. 3. The method for recycling resin parts according to claim 1, wherein the extruded material is heated in the rolling and stretching step to plasticize the base resin. 4. The method for recycling a resin part according to claim 1, wherein the extruded material is cooled to a temperature not more than the embrittlement temperature of the coating film piece in the rolling and stretching step. 5. A coarse crushing apparatus for crushing a coated resin part to obtain a coarse crushed material, and separating and separating a coarse coated film piece or a coarse plated piece in a state where the coarse crushed material is heated to melt the base resin. An extruding device for obtaining a coarsely separated material by removing it, an extruding device for heating and extruding the coarsely separated material to obtain a strand-shaped or film-shaped extruded material in which coating or plating pieces are mixed in a base resin; Rolling and stretching apparatus for rolling and stretching the material to obtain a rolled material in the form of a film, a fine pulverizing apparatus for pulverizing the rolled material to obtain a finely pulverized material, A recycling device for resin parts, comprising: a separation device for separating the component from a plating piece component. 6. A coarse crushing device for crushing a coated resin part to obtain a coarse crushed material, and separating and separating a coarse coated film piece or a coarse plated piece in a state where the coarse crushed material is heated to melt the base resin. A coarse separation device that removes the coarse separation material, a blow device that obtains a tube-shaped blow material in which a coating film piece or a plating piece is mixed into a base resin by the inflation method, and rolling and blowing the blow material. A stretching step of stretching to obtain a rolled material in the form of a film, a fine pulverizing device for pulverizing the rolled material to obtain a finely pulverized material, and forming the finely pulverized material into a base resin component and a coating film piece or a plating piece component And a separation step for separating the resin component into a resin component. 7. The method for recycling resin parts according to claim 5, wherein the rolling and stretching apparatus includes heating means for heating the extruded material to plasticize the base resin. 8. The method for recycling resin parts according to claim 5, wherein the rolling and stretching apparatus comprises cooling means for cooling the extruded material to a temperature lower than the embrittlement temperature of the coating film piece.