JP2002321218A - Method and apparatus for peeling surface material of resin product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for peeling the surface material of a resin product, excellent in the removal efficiency of the skin material, environmental safety and treatment capacity and capable of obtaining a recycled resin product of high quality, and an apparatus adapted thereto. SOLUTION: The apparatus for peeling the surface material from the resin product is constituted so as to peel the surface material from the roughly ground matter of the resin product having the surface material and has a rotary member 20 inserted into a cylinder 11 in a rotatable manner and equipped with a feeding spiral ridge part 21 having feeding spiral ridges 21a and a back flow spiral ridge part 22 having back flow spiral ridges 22a for allowing charged matter to flow backward by feed force in a reverse direction lower than the feed force due to the feeding spiral ridge part 21. The roughly ground matter or a mixture of the roughly ground matter and grinding matter is charged in the cylinder 11 and the charged matter 50 is frictionally fed through the cylinder 11 by applying pressure to the charged matter by the rotation of the rotary member to peel the surface material from the resin substrate of the roughly ground matter.

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 peeling a surface material of a resin product, wherein the surface material is peeled from a resin product having a surface material coated or adhered to the surface of a resin base material.

[0002]

2. Description of the Related Art In recent years, recycling of resin products has been demanded due to environmental problems and demands for resource reuse. For example, in the automobile industry, defective products generated during the production of resin products such as bumpers and side moldings have been reported. The recycling of resin products separated and recovered from end-of-life vehicles is attracting attention.

[0003] Such a resin product is often coated on the surface of a resin base material or a resin or the like of a different material is adhered to improve appearance and quality. For example, in a resin bumper, In general, a coating layer 103 is formed on the surface of a resin-made base layer 101 via a primer layer 102 as shown in FIG.

The base material layer 101 is made of, for example, a raw material obtained by mixing ethylene propylene rubber and talc as a filler on the basis of, for example, polypropylene which is a thermoplastic synthetic resin. At 98, a layer having a thickness t of about 2 to 4 mm is formed.

The primer layer 102 is an adhesive layer having a specific gravity of about 1.7 and a thickness of about 10 μm for reinforcing the bonding force between the base material layer 101 and the coating layer 103. Alternatively, it is a layer formed by applying a paint made of a polyurethane-based thermosetting synthetic resin as a raw material.

However, when such a resin bumper is pulverized and pelletized to obtain a reclaimed material, the polypropylene resin material constituting the base layer 101 of the resin product is mixed with coating film fragments, and this coating material is mixed. In the molding process using a polypropylene resin material with mixed film pieces, the coating film pieces impair the flowability of the molten resin, cause molding defects in the resin product, and the coating film that emerges on the surface of the resin product Since the pieces cause a reduction in the appearance of the resin product and there is almost no interaction between the coating film piece and the polypropylene resin, the coating film piece prevents kneading and integration in the regenerated resin, thereby reducing the resin product. Mechanical properties are significantly reduced.

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

[0008] This coating film removing method is mainly classified into mechanical, physical and chemical methods. The mechanical coating removal method is
For example, using a compressed air to spray fine particles of abrasive material onto the surface of the coating film formed on the resin product to destroy and remove the coating film and deposits, or after finely pulverizing the resin product And a screen mesh method in which a mixed coating film piece is removed without being filtered by being filtered through a screen mesh under heating and melting.

[0009] The shot brass method is excellent in toxicity and environmental safety because it removes the coating film by friction and impact, etc., but requires a great deal of processing time, the coating film removal efficiency is not sufficient, and especially in the case of a curved portion. Processing is difficult. In addition, the screen mesh method is excellent in toxicity and environmental safety because a coating film piece is removed by filtration, but when the screen mesh is clogged, the extrusion pressure increases significantly, the extrusion amount decreases, and productivity increases. And the efficiency of removing the coating film pieces is not sufficient, and it is necessary to replace the screen mesh to avoid a decrease in production efficiency due to clogging of the screen mesh.

[0010] The method of physically removing the coating film is to remove the coating film using a halogen-based solvent or various organic solvents, utilizing the solvent permeation to the interface between the coating film and the substrate and the swelling phenomenon of the coating film by the solvent. It is inferior in environmental safety such as treatment of waste liquid, has relatively low coating film removal efficiency and processing ability, and may further deteriorate the base material.

[0011] These mechanical and physical coating removal methods include:
Due to low coating film removal efficiency, resin products using recycled resin materials obtained by these methods increase the production cost of the products and greatly limit the range of applications.

The chemical coating removal method is, for example, an organic salt method of chemically decomposing and removing the coating by cutting an ether bond in the vicinity of the cross-link of the coating resin with a mixed solution of ethanol and water containing an organic salt. There is.

This method has a problem in secondary treatment such as wastewater treatment, has a low treatment capacity, and is not preferable in terms of treatment efficiency.

Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 5-337941, there is proposed a synthetic resin surface peeling apparatus for cutting and peeling a coating film by applying a cutting and frictional force to the coating film between a pair of rotating bodies. Have been.

As shown in a front view schematically shown in FIG. 9 and a sectional view taken along the line II of FIG. 9 in this peeling apparatus, a resin product such as a side molding 1
22 are rotating bodies 123 and 124 made of foaming synthetic resin.
By setting the transfer speed V of the side molding 122 to be lower than the rotational peripheral speed of the rotating bodies 123 and 124, the transfer and the high friction between the coating 122a and the double-sided adhesive tape 122b of the side molding 122 are performed. By applying a force, the coating film 122a and the double-sided adhesive tape 122b on the surface of the side molding 122 are cut and peeled,
And the side molding 12 by the pair of conveying rollers 121.
2 is discharged to the outside.

In this apparatus, since the resin products are brought into contact with the rotating rotating bodies 123 and 124 made of foamable synthetic resin, the rotating bodies 123 and 124 are brittlely broken to generate dust, which is not preferable in the working environment. Further, it was not suitable for peeling a coating film of a bent or curved resin product.

The same applies to the case where the dissimilar resin or the like adhered to the surface of the resin base material is removed or peeled off.

[0018]

SUMMARY OF THE INVENTION Accordingly, a first object of the present invention, which has been made in view of the above points, is to remove the surface material coated or adhered on the surface of the resin base material, and to improve the environmental safety and treatment. An object of the present invention is to provide a method of peeling a surface material of a resin product, which is capable of obtaining a high-quality recycled resin product having excellent ability.

Further, a second object of the present invention is to provide an apparatus for peeling a surface material of a resin product, which is constructed so that the above-mentioned method for peeling a surface material can be carried out simply and inexpensively.

[0020]

According to a first aspect of the present invention, there is provided a method for peeling a surface material of a resin product, wherein the surface material is coated or adhered to a surface of a resin base material. The method is characterized in that a resin product is coarsely pulverized, and the coarsely pulverized material is conveyed while being rubbed under pressure to peel a surface material from the resinous base material.

According to the first aspect of the present invention, the resin product is coarsely pulverized without using a chemical such as an organic salt or a solvent, and without requiring secondary treatment such as wastewater treatment. The surface material can be peeled from the resin base material in a small number of steps of transporting while securely rubbing under pressure, so that the efficiency of removing the surface material, environmental safety, and processing capacity can be improved.

According to a second aspect of the present invention, in the method for removing a surface material of a resin product according to the first aspect, a polished material is mixed with a coarsely crushed resin product and transported.

According to the second aspect of the present invention, in addition to the first aspect, the coarsely pulverized resin product is brought into contact with and rubbed with the polished material under pressure, thereby facilitating the peeling of the surface material from the resin base material. Thus, the efficiency of removing the surface material can be further improved.

According to a third aspect of the present invention, there is provided a resin product surface material peeling apparatus which achieves the above-mentioned second object, comprising a resin material having a surface material coated or adhered on the surface of a resin base material. In a resin material surface material peeling apparatus for peeling a surface material from a cylinder part having an input port on one end side and a discharge port on the other end side, rotatably inserted into a cylinder of the cylinder part, A transfer spiral ridge portion having a transfer spiral ridge for transferring the input material supplied from the input port to the discharge port side, and the transfer force of the input material by the transfer spiral ridge portion is weaker. A rotating member having a backflow spiral ridge portion having a backflow spiral ridge portion for backflowing the input material to the input port side with a reverse conveying force; and a drive section for rotating and driving the rotating member. Then, insert the above A coarsely pulverized fat product or a mixture of the coarsely pulverized product and the polished product is charged and charged, and the charged material is conveyed in the cylinder while being rubbed under pressure by the rotation of the rotating member. Characterized in that the surface material is separated from the resin base material.

According to the third aspect of the present invention, the input material is conveyed against the reverse conveying force of the backflow spiral ridge by the conveying force of the conveying spiral ridge due to the rotation of the rotating member. Therefore, the input materials receive the pressure in the cylinder and are conveyed while being reliably rubbed. Therefore, the surface material can be effectively separated from the resin base material of the coarsely crushed resin product without using a chemical such as an organic salt or a solvent, and without requiring secondary treatment such as wastewater treatment. , Resulting in improved removal efficiency of surface materials, environmental safety and processing capacity. Further, for example, the cylinder unit, the rotating member, or the driving unit can use components of an existing extruder, for example, and thus can be configured simply and inexpensively.

According to a fourth aspect of the present invention, in the apparatus for peeling a surface material of a resin product according to the third aspect, the rotating member further includes a portion between the conveying spiral ridge portion and the backflow spiral ridge portion. A linear ridge portion having a linear ridge extending linearly in the axial direction.

According to the fourth aspect of the present invention, since the charged materials are stirred under pressure at the linear ridge portions, the charged materials are more reliably rubbed against each other, and the efficiency of removing the surface material can be further improved. .

According to a fifth aspect of the present invention, in the resin material surface material peeling apparatus of the fourth aspect, the rotating member includes the conveying spiral ridge portion, the straight ridge portion, and the backflow spiral ridge portion. It is characterized by having a plurality of portions in the axial direction.

According to the fifth aspect of the present invention, since the rubbing of the input material by stirring under pressure is repeated, the surface material can be more efficiently removed.

According to a sixth aspect of the present invention, in the surface material peeling apparatus for a resin product according to the fourth or fifth aspect, the height of the linear ridge of the linear ridge portion is changed in the axial direction. I do.

According to the invention of claim 6, for example, by lowering the height of the straight ridge of the straight ridge portion at the central portion, the effect of stirring the input material is enhanced, and the surface material is more efficiently removed. Becomes possible.

According to a seventh aspect of the present invention, in the resin material surface material peeling apparatus of the third aspect, the rotating member further includes a portion between the transport spiral protruding portion and the backflow spiral protruding portion. In addition, it has an elliptical ridge portion formed so that a plurality of elliptical ridges whose outer shapes are substantially elliptical cross each other when viewed from the axial direction.

According to the seventh aspect of the present invention, the input material is efficiently stirred while being pressed at the elliptical ridge portion, and the input materials are more reliably rubbed with each other, so that the efficiency of removing the surface material can be further improved. It becomes possible.

According to an eighth aspect of the present invention, in the resin material surface material separating apparatus according to the seventh aspect, the rotating member includes the conveying spiral ridge, the elliptical ridge, and the backflow spiral ridge. It is characterized by having a plurality of portions in the axial direction.

According to the eighth aspect of the present invention, the input materials are repeatedly stirred at the successive elliptical ridges under pressure and the input materials are rubbed with each other, so that the efficiency of removing the surface material can be further improved. .

According to a ninth aspect of the present invention, in the apparatus for removing a surface material of a resin product according to any one of the third to eighth aspects, the rotating member further includes a gap between the inner peripheral surface of the cylinder and the outer peripheral surface. It is characterized by having a constant void portion throughout.

According to the ninth aspect of the present invention, since the charged materials are adapted to each other while being pressed in the gap, the removal efficiency of the surface material can be improved.

The invention described in claim 10 is the invention according to claims 3 to 9
In any one of the surface material peeling apparatuses for resin products, the axial length of the spiral ridge portion for backflow is shorter than the axial length of the spiral ridge portion for conveyance.

The eleventh aspect of the present invention is the third aspect of the present invention.
0, wherein the gap between the backflow spiral ridge of the backflow spiral ridge and the inner peripheral surface of the cylinder is formed by the transfer spiral ridge of the transfer spiral ridge. It is characterized in that it is larger than the gap between the ridge and the inner peripheral surface of the cylinder.

According to the tenth and eleventh aspects of the present invention, it is possible to more smoothly convey the input material under an appropriate pressure.

Further, according to a twelfth aspect of the present invention, there is provided an apparatus for peeling a surface material of a resin product, wherein the surface material is peeled from a coarsely pulverized resin product having a surface material coated or adhered to the surface of a resin base material. In the resin material surface material peeling device, the input port on one end side, a cylinder portion having a discharge port on the other end side, rotatably inserted into the cylinder of the cylinder portion,
A transfer spiral ridge portion having a transfer spiral ridge for transferring the input material supplied from the input port to the discharge port side, and a gap between the inner peripheral surface of the cylinder is constant over the circumferential direction. A rotating member having a void portion, a driving unit for driving the rotating member to rotate, and a discharge amount adjusting valve for adjusting a discharge amount of the input material from the discharge port. A mixture of the coarsely pulverized product of the resin product or the coarsely pulverized product and the polished product is added to the mixture, and the amount of the input product discharged from the discharge port is adjusted by the discharge amount adjustment valve. Are transported while being rubbed under pressure by the rotation of the rotary member in the cylinder, and the surface material is separated from the resin base material of the coarsely pulverized material.

According to the twelfth aspect of the present invention, by appropriately adjusting the discharge amount of the input material from the cylinder by the discharge amount adjusting valve, the input material is reliably rubbed while receiving the pressure in the cylinder. In addition to being conveyed, in the gap portion of the rotating member, the charged materials are compatible with each other under pressure, so that, similarly to the case of claim 3, without using a chemical such as an organic salt or a solvent, and The surface material can be effectively separated from the resin base material of the coarsely crushed resin product without the need for secondary treatment such as wastewater treatment, and the efficiency of surface material removal, environmental safety and processing capacity can be improved. Improvements are brought. Further, in this case, similarly to the case of the third aspect, for example, the cylinder portion, the rotating member, or the driving portion can be configured by using, for example, parts of an existing extruder, so that the configuration is simple and inexpensive. It becomes possible.

According to a thirteenth aspect of the present invention, in the resin material surface material peeling apparatus according to the twelfth aspect, the rotating member further includes a plurality of elliptical ridges having a substantially elliptical outer shape when viewed from the axial direction. And has an elliptical ridge portion formed so as to intersect.

According to the thirteenth aspect of the present invention, the input material is efficiently stirred while being pressurized at the elliptical ridge portion, and the input materials are surely rubbed with each other, so that the efficiency of removing the surface material can be further improved. Becomes

According to a fourteenth aspect of the present invention, in the resin product surface material peeling apparatus according to the thirteenth aspect, the rotating member comprises:
It is characterized in that it has a plurality of the conveying spiral ridge portion, the gap portion, and the elliptical ridge portion in the axial direction.

According to the fourteenth aspect of the present invention, the input materials are repeatedly stirred at the successive elliptical ridges under pressure and the input materials are rubbed with each other more reliably, so that the efficiency of removing the surface material can be further improved. It becomes possible.

According to the fifteenth aspect of the present invention,
4. The surface material peeling apparatus for resin products according to any one of 4), further comprising a heating means for heating the inside of the cylinder.

According to the fifteenth aspect of the present invention, since the input material is heated in the cylinder, the peeling efficiency of the surface material can be further improved.

The invention according to claim 16 is the invention according to claims 3-1.
In any one of the surface material peeling apparatuses for resin products according to any one of the first to fifth aspects, the cylinder unit includes a plurality of cylinder elements removably connected in an axial direction.

According to the sixteenth aspect, for example, when a plurality of components constituting the rotating member are arranged in combination in the axial direction, the assembly can be easily performed.

The invention according to claim 17 is the invention according to claims 3-1.
6. The surface material peeling apparatus for resin products according to any one of 6, wherein the inner surface of the cylinder is formed as a rough surface.

According to the seventeenth aspect of the present invention, since the surface material of the coarsely pulverized resin product is peeled even when the resin product rubs against the inner surface of the cylinder, the efficiency of removing the surface material and the processing ability can be further improved. .

[0053]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a method and an apparatus for removing a surface material from a resin product according to the present invention will be described below with reference to the drawings.

(First Embodiment) The first embodiment will be described with reference to FIGS. FIG. 1 is a partially cutaway view of the entire configuration, FIG. 2 is a cross-sectional view illustrating a detailed configuration of a cylinder unit and a rotating member, and FIG. 3 is a diagram for explaining operation.
FIGS. 4A and 4B are diagrams showing two modified examples of the straight ridge portion shown in FIG.

As shown in FIG. 1, the surface material peeling device 1 includes a cylinder 10 and a cylinder 11 of the cylinder 10.
Rotating member 20 rotatably inserted in the inside, rotating member 2
And a drive unit 30 for driving the rotation of the drive unit 0.

As shown in FIG. 2, the cylinder portion 10 has an input port 12 communicating with the cylinder 11 at an end portion on the drive portion 30 side, that is, an outer peripheral surface of the one end portion.
2 is provided with a hopper 40 connected thereto, and a discharge port 13 is opened at an end opposite to the drive unit 30, that is, at an end face of the other end.

The rotating member 20 includes a conveying spiral ridge portion 21 having a conveying helical ridge 21a for conveying an input material supplied from the input port 12 to the discharge port 13 side, and the conveying spiral ridge portion 21a. A backflow spiral ridge portion 22 having a backflow spiral ridge 22a for backflowing the input material toward the inlet 12 with a reverse conveyance force weaker than the conveyance force of the input material by the ridge portion 21; A plurality of sets of linear ridges 23 provided between the spiral ridge 21 and the spiral ridge 22 for backflow and having one linear ridge 23a extending linearly in the axial direction. Have.

In this embodiment, a resin product having a surface material to be peeled, such as a bumper, is coarsely pulverized in advance, and the coarsely pulverized material 50 is placed in the hopper 40 together with the polished material as necessary, as shown in FIG. The liquid is supplied from the charging port 12 into the cylinder 11 either directly or through a feeder (not shown). In addition, the rotating member 20 has at least the input port 12.
Is provided so that the spiral ridge portion 21 for conveyance is located at this portion.

As described above, when the coarsely pulverized product 50 of the resin product is put into the cylinder 11, the coarsely pulverized product 50 is conveyed by the transporting spiral ridge 21a adjacent to the transporting spiral ridge 21 constituting the rotary member 20. It is supplied between the gap and the cylinder 11 and moves in the direction of arrow A in the cylinder 11 by the rotation of the rotating member 20.

At this time, the helical ridge portion 21 for conveyance uses the rotational force and the pushing force of the coarsely crushed material 50 due to the rotation to generate
The coarsely crushed materials are rubbed with each other, and the coarsely crushed material 50 is extruded in the spiral ridge portion 22 for reverse flow against the conveyance force in the reverse direction due to the rotation thereof. The crushed material 50 is agitated in a pressurized state by the conveying force of the conveying spiral ridge portion 21 and the reverse conveying force of the backflow spiral ridge portion 22 in the straight ridge portion 23. The coarsely crushed materials are rubbed against each other, and these actions are
Repeated at the corresponding part according to the transport of 0.

Accordingly, the coarsely pulverized material 50 is surely rubbed against each other while being subjected to pressure in the cylinder 11 and is agitated and conveyed. During this time, a force for separating the surface material, for example, a shearing force acts, so that the surface material is almost completely separated from the resin base material and is extruded from the outlet 13. In particular, the abrasive is mixed with the coarsely crushed resin product 50 and the cylinder 11
When the raw material is put into the inside, the coarsely pulverized material 50 comes into contact with and rubs against the mixed abrasive material, so that the peeling of the surface material is promoted, and the efficiency of removing the surface material can be further increased.

Here, the surface material of the coarsely pulverized material 50 is separated into particles in the cylinder 11 and is extruded together with the resin base material from the discharge port 13 and discharged. And the surface material can be easily separated and separated by, for example, specific gravity, particle size separation or electrostatic separation.
Therefore, a high quality recycled resin product can be obtained by recycling the resin base material from which the surface material has been separated and separated.

In addition, the above-described cylinder unit 10 and rotating member 2
The drive unit 30 or the drive unit 30 can be configured by using, for example, parts of an existing extruder, so that the entire unit can be simple and inexpensive.

Further, the resin product is coarsely pulverized without using a chemical such as an organic salt or a solvent or a secondary treatment such as drainage treatment, and the coarsely pulverized product 50 is rotated by the rotation of the rotating member 20. Since the surface material is peeled off from the resin base material in a small process of securely rubbing and extruding while being pressurized in the cylinder 11, the surface material removal efficiency, environmental safety, and processing ability can be improved.

The straight ridge portion 23 is formed by changing the height of the straight ridge 23a in the axial direction so as to lower the height at the center, for example, or as shown in FIG. The ridges 23a can be provided symmetrically, or four straight ridges 23a can be provided symmetrically as shown in FIG. 4 (b), whereby the stirring effect can be further increased and the surface material can be removed more efficiently. it can.

Further, the axial length of the spiral ridge portion 22 for the backflow is made shorter than the axial length of the spiral ridge portion 21 for conveyance, or the gap between the spiral ridge 22a for the reverse flow and the inner peripheral surface of the cylinder. Can be made larger than the gap between the spiral ridge 21a for conveyance and the inner peripheral surface of the cylinder so that the coarsely crushed material 50 can be conveyed more smoothly under an appropriate pressure.

(Second Embodiment) FIGS. 5 and 6 show a second embodiment. FIG. 5 is a diagram showing the configuration of the main part of a cylinder portion and a rotating member, and FIG. 6 is a diagram shown in FIG. It is a perspective view of an elliptical ridge part.

In the present embodiment, the rotary member 20 is replaced with the straight ridge portion 23 of the first embodiment, and the outer shape is formed between the transport spiral ridge portion 21 and the backflow spiral ridge portion 22. A plurality of cylinders in which a plurality of substantially elliptical ridges 24a are formed so as to be sequentially orthogonal to each other when viewed from the axial direction, and the cylinder 10 is detachably connected in the axial direction. It is configured by the element 11a. An inlet 12 is formed in the cylinder element 11a where the coarsely crushed resin product 50 is to be charged.

As described above, the provision of the elliptical ridge portion 24 between the conveying spiral ridge portion 21 and the backflow spiral ridge portion 22 makes it possible to provide a more compact structure than in the case where the straight ridge portion 23 is provided.
Since the effect of stirring the coarsely crushed material in this portion can be enhanced, the coarsely crushed materials can be efficiently stirred under pressure and rubbed more reliably, and the removal efficiency of the surface material can be further increased. . In addition, by forming the cylinder portion 10 into an element, the transporting spiral ridge portion 21, the elliptical ridge portion 24, and the backflow spiral ridge portion 22 are connected to each other to rotate the rotating member 2.
When assembling 0, the assembling work can be easily performed.

In the first and second embodiments, an appropriate portion of the rotary member 20 may be provided with a constant gap with the inner circumferential surface of the cylinder in the circumferential direction. It is also possible to increase the efficiency of removing the surface material by mixing the input materials with each other while applying pressure to the portions.

(Third Embodiment) FIG. 7 shows the structure of a main part of a third embodiment. In the present embodiment, in the first embodiment, a discharge amount adjusting valve 25 for adjusting the discharge amount of the input material from the discharge port 13 is provided on the discharge port 13 side of the cylinder 11. In addition, the rotating member 20 includes a conveying spiral ridge portion 21 having a conveying spiral ridge 21a and a gap portion 26 in which a gap between the inner peripheral surface of the cylinder 11 and the inner peripheral surface is constant in the circumferential direction. Multiple sets are provided.

According to the present embodiment, the discharge amount of the coarsely pulverized material 50 from the cylinder 11 is appropriately adjusted by the discharge amount adjusting valve 25, so that the coarsely pulverized material 50 is coarsely pulverized while receiving pressure in the cylinder 11. The objects are reliably rubbed and transported, and in the gap portion 26 of the rotating member 20,
Since the coarsely pulverized materials are compatible with each other under pressure, the surface material can be effectively separated from the resin base material of the coarsely pulverized material 50 as in the case of the above embodiment, and the efficiency of removing the surface material can be improved. , Environmental safety and processing capacity can be improved.

In the present embodiment, the rotating member 2
0, an oval ridge portion 24 as shown in the second embodiment is provided at the appropriate position, and the coarsely pulverized products are agitated under pressure by the oval ridge portion 24 so as to more reliably rub each other. Thus, the efficiency of removing the surface material can be further increased.

The present invention is not limited to the above embodiment, but can be variously modified without departing from the spirit of the invention. For example, the number of spiral ridges for conveyance or spiral ridges for backflow is not limited to one, and a plurality of spiral ridges may be provided. Also, the sequential elliptical ridges 24a of the elliptical ridge portions 24 are not limited to being orthogonal,
It is also possible to provide different angles, for example, by 60 °.

Further, the inner surface of the cylinder is formed to be rough, and the surface material is peeled off even when the coarsely pulverized resin product rubs against the inner surface of the cylinder, thereby further improving the efficiency of removing the surface material and the processing capacity. can do.

Further, since the adhesion strength of the surface material of the resin product has a large temperature dependency, a heating means is provided in the cylinder to heat the inside of the cylinder to, for example, 40 ° C. to 80 ° C., thereby increasing the peeling efficiency of the surface material. It can be even higher.

An opening may be formed in the lower surface of the cylinder, and a mesh may be provided in the opening to allow a part of the granular surface material separated from the coarsely pulverized material to drop. In this case, since the surface material pieces contained in the discharge pushed out from the discharge port of the cylinder portion are reduced,
The work of separating and separating the resin base material and the surface material from the discharged material can be more easily performed.

[0078]

According to the method of the present invention for removing the surface material from a resin product as described above, the resin material can be used without using a chemical such as an organic salt or a solvent, and without requiring secondary treatment such as wastewater treatment. The surface material is peeled from the resin base material in a small process in which the product is coarsely pulverized and the coarsely pulverized material is securely rubbed under pressure and conveyed, so the surface material removal efficiency, environmental safety and processing capacity are excellent. It is very versatile and can greatly contribute to the recycling of resin products in a wide range of fields.

Further, according to the resin product surface material peeling apparatus of the present invention, the use of a chemical such as an organic salt or a solvent is eliminated.
And without requiring secondary treatment such as wastewater treatment, the resin product is coarsely pulverized, and the coarsely pulverized material is conveyed while being rubbed in a cylinder while applying pressure, so that the surface material can be reliably removed from the resin base material. It is possible to peel off, improving the removal efficiency of surface materials, environmental safety and processing capacity, and for example, the cylinder part, the rotating member or the driving part can be made by using the parts of the existing extruder, for example. Because it can be configured, it can be simple and inexpensive.

[Brief description of the drawings]

FIG. 1 is a partially cutaway view showing the entire configuration of a resin product surface material peeling apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a detailed configuration of a cylinder unit and a rotating member shown in FIG. 1;

FIG. 3 is a diagram for explaining the operation of the first embodiment.

FIG. 4 is a perspective view showing two modified examples of the linear ridge portion used in the first embodiment.

FIG. 5 is a diagram illustrating a configuration of a main part of a cylinder unit and a rotating member according to a second embodiment.

6 is a perspective view of the elliptical ridge shown in FIG.

FIG. 7 is a diagram showing a configuration of a main part of a third embodiment.

FIG. 8 is a sectional view of a main part of a resin bumper.

FIG. 9 is a front view showing an outline of a conventional peeling device.

FIG. 10 is a sectional view taken along line II of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface material peeling apparatus 10 Cylinder part 11 Cylinder 11a Cylinder element 12 Injection port 13 Discharge port 20 Rotating member 21 Conveyor spiral ridge 21a Conveyor spiral ridge 22 Backflow spiral ridge 22a Backflow spiral ridge 23 Straight Ridge 23a Straight ridge 24 Oval ridge 24a Oval ridge 25 Discharge adjusting valve 26 Void 30 Drive unit 40 Hopper 50 Coarsely crushed material

Claims (17)

[Claims] 1. A resin product having a surface material coated or adhered to the surface of a resin base material is roughly pulverized, and the coarsely pulverized material is conveyed while being rubbed under pressure to remove the surface material from the resin base material. A method for peeling a surface material of a resin product, the method comprising peeling the surface material. 2. The method according to claim 1, wherein an abrasive is mixed with the coarsely pulverized resin product and transported. 3. A resin product surface material peeling apparatus for peeling a surface material from a coarsely pulverized resin product having a surface material coated or bonded on a surface of a resin base material, wherein an input port is provided at one end side; A cylinder portion having a discharge port on the other end side, and a transfer spiral ridge rotatably inserted into the cylinder of the cylinder portion, for transferring an input material supplied from the input port to the discharge port side. A spiral ridge portion for transport having a reverse helical ridge portion for reversely flowing the input material to the input port side with a reverse transport force weaker than the transport force of the input material by the spiral spiral ridge portion for transport. A rotary member having a spiral ridge portion for backflow having a strip, and a drive unit for rotating the rotary member, and a coarsely crushed product or the coarsely crushed product of the resin product is introduced into the cylinder from the input port. Abrasive material is mixed and thrown in, A surface material peeling apparatus for a resin product, wherein the surface material is peeled from the resin base material of the coarsely pulverized material while being conveyed while applying pressure by the rotation of the rotary member in the cylinder. . 4. The rotary member further includes a linear ridge extending linearly in the axial direction between the transport spiral ridge and the backflow spiral ridge. The surface material peeling apparatus for resin products according to claim 3, further comprising: 5. The resin product according to claim 4, wherein the rotating member has a plurality of the conveying spiral ridges, the straight ridges, and the backflow spiral ridges in the axial direction. Surface material peeling device. 6. The resin material surface material peeling apparatus according to claim 4, wherein the height of the linear ridge of the linear ridge portion is changed in the axial direction. 7. The rotating member further intersects a plurality of elliptical ridges having a substantially elliptical outer shape between the transport spiral ridge and the backflow spiral ridge when viewed from the axial direction. The resin material surface material peeling device according to claim 3, further comprising an elliptical ridge portion formed so as to be formed. 8. The resin product according to claim 7, wherein the rotating member has a plurality of the conveying spiral ridges, the elliptical ridges, and the backflow spiral ridges in the axial direction. Surface material peeling device. 9. The rotating member according to claim 3, wherein a gap with the inner peripheral surface of the cylinder has a constant gap portion in a circumferential direction.
The surface material peeling device for a resin product according to any one of the above. 10. The method according to claim 3, wherein an axial length of the backflow spiral ridge portion is shorter than an axial length of the transport spiral ridge portion. Surface material peeling device for resin products. 11. A gap between the backflow spiral ridge of the backflow spiral ridge portion and the inner peripheral surface of the cylinder is provided by the transfer spiral ridge of the transport spiral ridge portion and the inner peripheral surface of the cylinder. 3. The gap between the first and second members is larger than the gap between the first and second members.
0. A surface material peeling apparatus for resin products according to any one of the above items. 12. A resin material surface material peeling apparatus for peeling a surface material from a coarsely pulverized resin product having a surface material coated or adhered to a surface of a resin base material, wherein an input port is provided at one end side; A cylinder portion having a discharge port on the other end side, and a transfer spiral ridge rotatably inserted into the cylinder of the cylinder portion, for transferring an input material supplied from the input port to the discharge port side. A spiral ridge portion for conveyance having a rotating member having a constant gap portion in a circumferential direction with a gap between the inner peripheral surface of the cylinder and a driving portion for rotating and driving the rotating member; A discharge amount adjusting valve for adjusting the discharge amount of the input material, and a coarsely crushed material of the resin product or a mixture of the coarsely crushed material and the polished material is poured into the cylinder from the input port, The amount of the input material discharged from the discharge port By adjusting with an amount adjustment valve, the input material was conveyed while being rubbed under pressure by the rotation of the rotating member in the cylinder, and the surface material was separated from the resin base material of the coarsely pulverized material. A surface material peeling device for a resin product. 13. The rotary member according to claim 12, further comprising an elliptical ridge portion formed so that a plurality of elliptical ridges having an approximately elliptical outer shape cross each other when viewed from the axial direction. A surface material peeling device for a resin product as described in the above. 14. The rotating member according to claim 1, wherein the rotating spiral ridge portion, the gap portion, and the elliptical ridge portion have a plurality in the axial direction.
4. The surface material peeling device for resin products according to 3. 15. The resin material surface material peeling apparatus according to claim 3, further comprising a heating means for heating the inside of the cylinder. 16. The resin material surface material peeling device according to claim 3, wherein said cylinder portion is constituted by a plurality of cylinder elements connected detachably in an axial direction. 17. The apparatus according to claim 3, wherein an inner surface of the cylinder is formed with a rough surface.