JP3116554B2 - Synthetic resin surface peeling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention removes a double-sided tape, a coating film and the like adhered to a side molding, a bumper, and other synthetic resin decorative plates used as functional parts for decoration and cushioning of automobiles and the like. The present invention relates to a device for removing a synthetic resin surface.

[0002]

2. Description of the Related Art In general, decorative synthetic resin products, such as side moldings for automobiles, are often coated on the surface of the product in order to improve appearance and improve product quality. In many cases, a double-sided tape is bonded to the back surface of the product to be attached to the body of an automobile.

[0003] In-process defective products generated during the production of such synthetic resin products such as side moldings for automobiles, and recovered products of actual synthetic resin products separated from end-of-life vehicles separate coating films and double-sided tape. Since it takes time and effort, there is a case where these are recycled without being separated. However, even if the recycled material is manufactured by crushing while having the coating film and the double-sided tape, the recycling cost becomes extremely high,
The ratio of recycled synthetic resin products was not high because the yield of recycled products was poor and the mechanical properties were significantly reduced.

On the other hand, studies on chemically separating a double-sided tape, a coating film, and the like using an organic solvent or the like have been actively conducted recently, but (1) the separation efficiency is poor.

(2) Since an organic solvent is used, damage to the synthetic resin product body is large, and deterioration of physical properties is inevitable.

(3) It is necessary to treat the separated organic solvent as a waste liquid.

However, it is difficult to say that the method is industrially useful.

[0008]

However, at present, there is a growing trend of recycling synthetic resin products from the viewpoint of environmental protection, and the synthetic resin products such as the side moldings for automobiles are being recycled. . Of course, in the case of recycling, it is necessary to make the reproduction cost lower than the current state. Also, to stabilize the physical properties,
It is not preferable to mix a coating film or a double-sided tape with the material to be recycled.

Therefore, according to the present invention, a synthetic resin molded article can be obtained by removing surface treatments such as a coating film and a double-sided tape applied for commercializing a synthetic resin product. An object of the present invention is to provide a device for removing a synthetic resin surface.

[0010]

In the apparatus for separating a synthetic resin surface according to the present invention, the synthetic resin product comes into contact with the surface thereof, and a difference speed is generated between the transport speed of the synthetic resin product and the peripheral moving speed. A rotating body made of a foamable synthetic resin rotated so as to rotate, a driving unit for rotating the rotating body at a predetermined number of revolutions so that the differential speed is generated, and the rotating body and the synthetic resin product. And a pressing means for pressing the rotating body against the synthetic resin product with a predetermined pressure.

[0011]

According to the present invention, a rotating body made of a foamable synthetic resin is rotated at a predetermined rotational speed by a driving means while being in contact with the surface of the synthetic resin product. At this time, the rotating body is pressed at a predetermined pressure by the pressing force urging means. Thereby, the rotating body cuts and peels off the coating film and the double-sided tape on the surface of the synthetic resin product. The peeled coating film and the double-sided tape adhere to the rotating body, but the rotating body is made of foaming synthetic resin, and during cutting and peeling, the contact portion of the rotating body with the synthetic resin is brittlely broken and powdered. The peeled coating film and the double-sided tape do not become integral with the rotating body.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing a flow as viewed from the front as an apparatus for removing a synthetic resin surface according to an embodiment of the present invention, in which a coating film and a double-sided tape of a side molding for an automobile are simultaneously removed. FIG. 2 is an explanatory view of a synthetic resin surface peeling apparatus according to an embodiment of the present invention as viewed from a side.

In FIG. 1, an automobile side molding 4
Is a coating film 2 on the upper surface of the synthetic resin molded product 1 serving as the core material.
And a double-sided tape 3 on its lower surface.
Are joined.

At the entrance side of the transport path for transporting the automobile side molding 4, an automobile side molding 4 to be transported is provided.
, A pair of transport rollers 21 which are nipped by the pressing force of the two and transported by the rotation thereof.
The rotating body 5 is disposed above a position slightly away from the pair of transport rollers 21 in the transport direction of the side molding 4 for a vehicle. A rotator 6 is disposed at a lower position of the side molding 4 for a vehicle facing the rotator 5.
A pair of transport rollers 22 are disposed above and below a position slightly away from the rotating body 5 and the rotating body 6 in the transport direction of the side molding 4 for the vehicle, by the pressing force of both, and transported by the rotation. It is located on the exit side of the transport path for transporting the side molding 4 for automobiles. The pair of transport rollers 21 and the pair of transport rollers 22 have substantially the same mechanism.

The automobile side molding 4 is transferred to the rotating body 5 and the rotating body 6 by a pair of conveying rollers 21, and
A cutting and peeling step of removing the coating film 2 and the double-sided tape 3 of the side molding 4 for an automobile using the rotating bodies 5 and 6 and discharging the synthetic resin molded article 1 from the rotating bodies 5 and 6 by the pair of conveying rollers 22. Having a flow of

The rotating body 5 and the rotating body 6 used in this embodiment
Is vinyl chloride (PVC) as a soft foaming synthetic resin
Is formed. Specifically, a plasticizer, a heat stabilizer, and a foaming agent are blended in appropriate amounts in a PVC resin, and kneaded and molded by a usual method. Generally used materials have a material hardness (JISA) of 30 to 95 (preferably about 40 to 80) and an expansion ratio of about 2 to 50. In addition, according to experiments conducted by the present inventors, it was confirmed that, in comparison with a hard elastomer, a material formed of soft foamable vinyl chloride had good release characteristics. The rotator 5 and the rotator 6 of this embodiment are not limited to soft foaming synthetic resins, but are preferably foaming synthetic resins. That is, the foamed synthetic resin can form a pumice-like uneven surface due to the foamed cavities, and the coating film 2 and the double-sided tape 3 are cut by friction of the coating film 2 and the double-sided tape 3. Before the peeling and the deterioration of the peeling ability, the places used for the peeling are sequentially subjected to brittle fracture, and the surfaces of the rotating bodies 5 and 6 are powdered of the coating film 2 and the double-sided tape adhered by the cutting peeling. 3 and can always be separated from the rotating bodies 5 and 6
A part of it becomes a new surface.

In particular, as shown in FIG. 2, the rotating body 5 of the present embodiment is composed of a number of element disks 5a, each of which is voluntarily standardized to have the same diameter and thickness, and is laminated on the shaft 5b with a fastening means 5
and is rotatable integrally with the shaft 5b. Further, the rotating body 6 of the present embodiment has an element disk 6a standardized to the same diameter and thickness disposed via two spacers 6d, and a fastening means 6c attached to the shaft 6b.
And is rotatable integrally with the shaft 6b.

However, when the present invention is carried out, the rotating body 5
The rotating body 6 may be formed by lamination, or may be formed alone. However, in the case of forming by lamination, the thickness can be arbitrarily set by lamination.

Further, the rotating bodies 5 and 6 are configured as shown in FIG.

FIG. 3 is a structural view of a synthetic resin surface peeling apparatus according to an embodiment of the present invention, which has a rotating body 5 for removing the coating film 2 and the double-sided tape 3 of the side molding 4 for an automobile.

In FIG. 3, the rotating body 5 shown here is
It is also equivalent to the rotating body 6 and usually has a cylindrical shape in an initial state, but is worn by cutting and peeling of the coating film 2 and the double-sided tape 3 so as to conform to the outer shape of the synthetic resin molded product 1. become. The rotating body 5 is supported by a substantially U-shaped support 8 by a shaft 5b. The shaft 5b of the rotating body 5 is directly connected to a driving means 7 composed of a motor such as an induction motor, a series motor or an air motor, and the driving means 7 is attached to a support 8.
As the driving means 7, an electric or air motor having a rotation characteristic of high-speed rotation is generally used.

On the upper part of the substantially U-shaped support member 8, one or a plurality of support members 8 are attached so as to restrict the rotation with respect to the body attachment member 9 attached to the main body 10 to which the support 8 is fixed. The guide member 12 is fixed. The guide member 12 is inserted through the through hole 9 a of the body attachment member 9, and the guide member 12 is inserted into the through hole 9 a of the body attachment member 9.
Is moved up and down to restrict the rotation with respect to the body attachment member 9. A constant torque motor 13 as a pressing force urging means is provided on a motor mounting base 14 arranged in parallel with the body mounting member 9. The constant-torque motor 13 has a constant-torque control or constant-torque output characteristic, and equalizes the pressing force of the rotating body 5 against the coating film 2 or the double-sided tape 3 of the side molding 4 for an automobile by external control. Is what you can do. Output shaft 1 of the constant torque motor 13
1 is provided with a ball screw, and the ball screw of the output shaft 11 is screwed to the body mounting member 9. The end of the output shaft 11 on the opposite side of the constant torque motor 13 is:
It is rotatably supported on the upper part of a substantially U-shaped support body 8. Therefore, the electric motor mounting base 14 provided with the constant torque motor 13 moves up and down on the upper surface side of the body mounting member 9 while its rotation is regulated by the guide member 12.

One of the plurality of guide members 12 is formed with a linear gear, that is, a rack 12a. The rack 12a is provided with a pinion 15 of an encoder 15.
a. The output of the encoder 15 detects the position of the support 8 by the guide member 12 and determines the position of the support 8 in a no-load state by a control system (not shown).

Next, the operation of the thus-constructed synthetic resin surface peeling apparatus of this embodiment will be described.

First, a pair of transport rollers 21 for transporting the automobile side molding 4 to the rotating body 5 and the rotating body 6 side, the coating film 2 and the double-sided tape 3 of the automobile side molding 4 from the rotating body 5 and the rotating body 6 side. The pair of transport rollers 22 for discharging the synthetic resin molded article 1 from which the resin has been removed are rotated at a constant speed by a motor (not shown). At this time, the transport speed of the transport rollers 21 and 22 is V0. Rotating body 5
The rotating body 6 is rotated at a high speed by the driving means 7 attached to the supporting body 8. The rotation speed at this time is determined by the conveyance speed V0 of the side molding 4 for the vehicle by the conveyance rollers 21 and 22. The rotation speeds of the rotating bodies 5 and 6 are set to N, and the rotating bodies 5 and 6 are rotated.
When the diameter of the rotating body 5 and the rotating body 6 is D, the peripheral speed V of the rotating body 5 and the rotating body 6 is V = πDN.
(V = πDN> V0)
)Is required. At this time, since the diameters D of the rotating bodies 5 and 6 are worn down by their use and the diameters D are reduced, first, a change in the diameter D0 of the usable limit of the rotating bodies 5 and 6 is considered. Therefore, the peripheral speed V of the rotating body 5 and the rotating body 6 is about 100 to 1000 times the conveying speed V0,
Preferably, it is set to an intermediate value. As a result, the magnification of the peripheral speed V and the transport speed V0 means that the limit characteristic of the cutting and peeling of the diameter D0 of the use limit of the rotating body 5 and the rotating body 6 is determined. However, the relationship between the peripheral speed V and the transport speed V0 also changes depending on the properties of the side molding 4 for the automobile, the rotating bodies 5 and 6.

After the speed V around the rotator 5 and the rotator 6 and the transport speed V0 of the transport rollers 21 and 22 are set in a predetermined relationship, the rotator 5 is stopped at a predetermined position. Keep it. Therefore, a pair of transport rollers 2
When the vehicle side molding 4 is supplied during the period 1, the vehicle side molding 4 is transported by the pair of transport rollers 21 and supplied between the rotating body 5 and the rotating body 6. Rotating body 5
Car side molding 4 supplied between the motor and the rotating body 6
In other words, the rotating body 5 comes into contact with the automobile side molding 4 from the upper side and the rotating body 6 from the lower side with a constant torque by the action of the constant torque motor 13. Since the transport speed V0 of the side molding 4 for an automobile is lower than the peripheral speed V of the rotating body 5 and the rotating body 6, the coating 2 and the double-sided tape 3 of the side molding 4 for the automobile are cut and high. The frictional force acts to cut off the coating film 2 and the double-sided tape 3 on the surface of the side molding 4 for a vehicle. The synthetic resin molded article 1 from which the coating film 2 and the double-sided tape 3 of the automobile side molding 4 have been removed is discharged from the rotator 5 and the rotator 6 and discharged to the outside by a pair of transport rollers 22.

The coating film 2 and the double-sided tape 3 on the surface of the automobile side molding 4 are coated with the coating film 2 by the speed difference between the conveying speed V 0 of the automobile side molding 4 and the peripheral speed V of the rotating bodies 5 and 6. And the double-sided tape 3 is cut off. The coating film 2 and the double-sided tape 3 that have been cut and peeled off are directly blown off from the periphery of the rotator 5 and the rotator 6 by centrifugal force, or adhere to the periphery of the rotator 5 or the rotator 6. Alternatively, the coating film 2 and the double-sided tape 3 which are filled in the foamed hollow portion of the rotating body 6 or are pulverized or agglomerated together rotate with the rotating body 5 or the rotating body 6. As a result, the partition walls forming the foamed hollow portion of the rotating body 5 or the rotating body 6 are subjected to a large external force at the time of cutting and peeling, and their surfaces are brittlely destroyed, and the coating film 2 and the double-sided tape are applied. 3 and fall from the periphery of the rotating body 5 or the rotating body 6.

Therefore, the rotating body 5 and the rotating body 6 are continuously formed by removing the coating film 2 and the double-sided tape 3 of the side molding 4 for an automobile and forming the synthetic resin molded article 1 made of a single synthetic resin.
Can be obtained.

In this embodiment, the rotating body 5 and the rotating body 6 are used at the same time to remove the coating film 2 and the double-sided tape 3 on the front and back of the side molding 4 for an automobile. Does not require the use of the rotating body 5 and the rotating body 6 at the same time to cut and separate the front and back of the side molding 4 for an automobile. For example, it can be implemented as shown in FIG.

FIG. 4 is a cross-sectional view of a main part of a synthetic resin surface peeling apparatus according to another embodiment of the present invention. In the drawings, the same reference numerals and symbols as those of the above-described embodiment denote the same or corresponding components as those of the above-described embodiment.

FIG. 4 shows the rotary member 6 of the embodiment as a table-shaped sliding plate 20 which does not escape downward, and slides and transports the side molding 4 (not shown) for the automobile along the upper surface thereof. It is to let. That is, a concave groove 21 is formed in the sliding plate 20 of the present embodiment, and the automobile side molding 4 is slid in the concave groove 21 by a conveying roller (not shown) to rotate the rotating body of the synthetic resin surface peeling device. 5 to the lower part. The rotating body 5 can remove one surface of the side molding 4 for a vehicle, that is, the coating film 2 or the double-sided tape 3 with a predetermined pressing force, to obtain a synthetic resin molded product 1 made of a single synthetic resin.

As described above, the apparatus for removing a synthetic resin surface according to the present embodiment comes into contact with the surface of the synthetic resin product and generates a difference speed between the transport speed V0 and the peripheral speed V of the synthetic resin product. Rotating bodies 5 and 6 made of a foamable synthetic resin rotated at a predetermined speed; driving means 7 for rotating the rotating bodies 5 and 6 at a predetermined rotation speed so as to generate the differential speed; A rotating member holding means comprising a substantially U-shaped support member 8 which adjustably holds a relative distance between the rotating members 6 and the synthetic resin product; and rotating the rotating members 5 and 6 toward the synthetic resin product at a predetermined pressure. Constant torque motor 13 as pressing force urging means for pressing
Is provided.

Therefore, the difference between the transport speed V0 of the synthetic resin product used as the side molding 4 for an automobile and the peripheral speed V of the rotating bodies 5 and 6 causes the coating film 2 on the surface of the rotating body 5 and 6 to rotate.
And the double-sided tape 3 is cut off. Further, the coating film 2 and the double-sided tape 3 that have been cut and peeled are blown off directly from the periphery of the rotating bodies 5 and 6 by centrifugal force, or adhere to the surroundings of the rotating bodies 5 and 6, and The coating film 2 and the double-sided tape 3 on the surface of the synthetic resin product are cut off by being filled in the foamed hollow portion. Then, the coating film 2 and the double-sided tape 3 attached to the periphery of the rotating bodies 5 and 6 or filled in the foamed hollow portions of the rotating bodies 5 and 6 are integrally formed with the rotating body 5 or the rotating body 6. Rotate. Thereby, the rotating body 5
Alternatively, the partition wall forming the foamed hollow portion of the rotating body 6 receives a large external force during cutting and peeling,
Their surfaces are brittlely fractured to form powders or small lumps of the coating film 2 and the double-sided tape 3 and fall from around the rotating body 5 or the rotating body 6.

Therefore, by bringing the rotating bodies 5 and 6 made of foaming synthetic resin rotating on the surface of the synthetic resin product into contact with a predetermined pressure, a coating film, a double-sided tape, and an adhesive adhered to the surface of the synthetic resin product. Agents, metals, etc. that can not be treated as a single material due to the surface treatment of decorative products used in automobiles or synthetic resin products as specific functional parts. By removing, recycling becomes possible. Needless to say, in this embodiment, the case of the side molding 4 for an automobile has been described as a synthetic resin product. However, when the present invention is implemented, the use as a synthetic resin product is not limited to an automobile.

The rotating bodies 5 and 6 made of foamable synthetic resin used here are to be finely divided as a result, and are to be brittlely broken by the minute structural units. It can also be molded by recycling the synthetic resin product obtained by implementation.

By the way, from the foamable synthetic resin which is brought into contact with the surface of the synthetic resin product of the above embodiment and rotated so that a difference speed is generated between the transport speed V0 and the peripheral speed V of the synthetic resin product. Rotating bodies 5 and 6 are
Although the shape of 6 is made to match the outer shape of the synthetic resin product, when using the present invention, the number of rotating bodies may be determined according to the outer shape of the synthetic resin product, or It is also possible to obtain a synthetic resin product from which desired surface treatment has been removed by repeated cutting and peeling of the product.

The driving means 7 for rotating the rotating bodies 5 and 6 of the above embodiment at a predetermined number of revolutions so as to generate a differential speed with the transport speed V0 of the synthetic resin product is provided by the transport roller 2.
Although a motor independent of a motor (not shown) for driving the motors 1 and 22 is used, the motor may be shared when the present invention is implemented.

The rotating body holding means for holding the relative spacing between the rotating bodies 5 and 6 and the synthetic resin product in the above embodiment in an adjustable manner comprises a substantially U-shaped support 8. In practicing the present invention, any mechanism capable of controlling the positioning of the rotating body may be used.

Further, the pressing means for pressing the rotating bodies 5 and 6 of the above embodiment toward the synthetic resin product at a predetermined pressure uses the constant torque motor 13, but the present invention is implemented. In this case, a spring for applying an elastic force or a hydraulic / pneumatically controlled cylinder may be used.

In practicing the present invention, the number and shape of the rotating bodies of the apparatus for separating the synthetic resin surface do not matter as in the above embodiments. For example, depending on the shape of the surface of the long or chip-shaped synthetic resin surface to be peeled off,
In some cases, four rotators are provided on the upper, lower, left and right sides. Alternatively, the rotating body of the peeling device for the synthetic resin surface is made long, and the coating film, double-sided tape, adhesive, metal, etc. on the long or chip-shaped synthetic resin surface flowing on the surface of the rotating body is removed. Can be.

In practicing the present invention, the rotating direction of the rotating body in each of the above embodiments can be reversed.
In this case, since the rotation of the rotating body becomes a load on the transport roller, it is necessary to increase the transport energy.

[0043]

As described above, the apparatus for removing a synthetic resin surface according to the present invention has a foaming synthetic resin rotated so that a difference speed is generated between the conveying speed of the synthetic resin product and the peripheral moving speed. A rotating body made of resin is brought into contact with the surface of the synthetic resin product. As a result, the surface treated portion is cut off by the difference between the transport speed of the synthetic resin product having a specific application and the peripheral speed of the rotating body. In addition, the cut and peeled part is blown off directly from the periphery of the rotating body by centrifugal force, or adheres to the periphery of the rotating body, and it is filled in the foamed cavity forming the rotating body, The surface-treated portion of the synthetic resin product is cut off. Then, the surface-treated portion attached to the periphery of the rotating body or filled in the foamed hollow portion of the rotating body integrally rotates with the rotating body, but forms the foamed hollow portion of the rotating body. The partition walls are subjected to a large external force during cutting and peeling, and the surface-treated portion of which the surface is brittlely broken and removed is turned into a powder or a small lump, which can be dropped from around the rotating body. .

Therefore, by bringing a rotating body made of a foaming synthetic resin that rotates on the surface of the synthetic resin product into contact with a predetermined pressure, a coating film, a double-sided tape, an adhesive, and a metal adhered to the surface of the synthetic resin product. By removing the surface treatment part of the synthetic resin product, it is possible to remove the surface treatment part such as a decorative material or a specific functional component by the surface treatment of the synthetic resin product. Recycling becomes possible, and resources can be reused. In addition, since the rotating body made of the foamable synthetic resin used here is to be finely divided as a result and is to be brittlely broken in the minute structural unit, it is necessary to mold the synthetic resin product by recycling. In addition, since the recycled material can be processed by the recycled synthetic resin product, waste of resources is eliminated and the use efficiency is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a flow as viewed from the front of a device for removing a synthetic resin surface according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a synthetic resin surface peeling apparatus according to one embodiment of the present invention as viewed from a side.

FIG. 3 is a configuration diagram of an apparatus for peeling a synthetic resin surface according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of an essential part of a synthetic resin surface peeling apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Synthetic resin molded article 5, 6 Rotating body 7 Driving means 8 Support body (rotating body holding means) 13 Constant torque motor (pressing force urging means) V0 Transport speed V Peripheral speed

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeki Suzuki 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Masaki 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-48-79235 (JP, A) JP-A-5-69443 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29B 17/00-17 / 02 B44D 3/16 C08J 11/00-11/28

Claims (1)

(57) [Claims] 1. A rotating body made of a foamable synthetic resin which is brought into contact with the surface of a synthetic resin product and is rotated so as to generate a speed difference between a transport speed of the synthetic resin product and a peripheral moving speed; Driving means for rotating the rotating body at a predetermined number of revolutions so that the differential speed is generated; rotating body holding means for adjusting and holding a relative distance between the rotating body and the synthetic resin product; And a pressing force urging means for pressing the rotating body toward the synthetic resin product with a predetermined pressure.