JP3182087B2 - Coating peeler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to coating of resin materials such as bumpers, side moldings, and CD-ROMs used as functional parts for decoration and cushioning of automobiles and the like, for example, by coating or plating. processing is concerned the coating film peeling equipment for peeling a film from a resin member that has been subjected.

[0002]

2. Description of the Related Art In recent years, recycling of resin members has been called out due to increasing concerns about environmental problems and resource recycling. For example, even in the automobile industry, a process which occurs when manufacturing resin members such as bumpers and side moldings. Attention has been focused on the recycling of resin members separated and recovered from defective products and end-of-life vehicles.

[0003] Such resin members such as bumpers and side moldings are often coated on the surface of products in order to improve appearance and quality. For example, on the surface of a bumper, a coating film is formed on a resin material made of a thermoplastic resin such as a polypropylene resin via a primer layer made of a thermoplastic resin such as a chlorinated polyolefin resin. This coating film is, for example, a thermosetting resin such as an aminopolyester-based, aminoacrylic, polyesterurethane-based or acrylurethane-based resin, and these resins before the curing reaction are in a liquid state. Granted. 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, if the coated bumper is crushed and reused as it is, a piece of the coating film is mixed with the polypropylene resin constituting the material of the resin member, and the polypropylene resin mixed with the coating film piece is removed. In the molding process used,
Coating fragments hinder the fluidity of the molten resin, cause molding defects such as "burn", "weld mark", and "bubbles" in the recycled resin product, and the coating fragments that emerge on the surface of the resin product However, there are problems such as impairing the appearance of the resin product.

Further, since the coating film piece is a thermosetting resin and the polypropylene resin serving as a base resin is a thermoplastic resin, there is almost no compatibility between the coating film piece and the base resin, Uncoated film pieces prevent kneading and integration in the reclaimed resin, thereby significantly lowering the mechanical properties of the reclaimed resin product, greatly limiting the range of applications of the reclaimed resin product.

For this reason, it is necessary to remove the coating film when recycling the coated resin member. For this purpose, an apparatus for removing the coating film from the resin member is disclosed in Japanese Patent Application Laid-Open No. 5-33.
Japanese Patent Application Laid-Open No. 7941 discloses a device for removing a synthetic resin surface as shown in FIG.

The peeling device includes a pair of transport rollers 101
The resin material, for example, the side molding 102 is transferred between the rotating bodies 103 and 104 made of synthetic resin which is foamable, and the conveying speed V of the side molding 102 is reduced
By setting the rotation peripheral speed to be lower than the rotational peripheral speed of the side molding 1, cutting and high frictional force are applied to the coating film 102 a and the double-sided tape 102 b of the side molding 102.
02, the coating film 102a and the double-sided tape 102b are cut and peeled, and the side molding 102 is carried out to the outside by a pair of conveying rollers 101. However, the above-mentioned peeling device is not preferable in the working environment, such as that the rotating members 103 and 104 are brittlely broken to generate dust because the resin members are brought into contact with the rotating rotating members 103 and 104 made of foamable synthetic resin. There is a problem that it is not suitable for a resin member having a curved or curved shape. As a countermeasure for this, for example, as disclosed in JP-A-7-256640,
The coated resin member is rolled by a coating film peeling device having a pair of rolls arranged opposite to each other and having different rotational peripheral speeds, and a shearing shear stress is applied between the resin material and the coating film to form the resin material. There is a method of peeling the coating film from the. According to this method, the coating film can be removed with a simple apparatus and method.

[0008]

However, in the above-mentioned method, when resin members having different thicknesses are to be continuously processed, sufficient shearing between the resin material and the coating film may be caused depending on the difference in the thicknesses. There is a case where shear stress does not act and the removal rate of the coating film decreases. For this reason, every time the thickness of the resin member changes, the operator needs to sequentially adjust the gap between the two rolls, thereby reducing the working efficiency.

Accordingly, it is an object of the present invention is to provide a coating film peeling equipment capable thickness of the resin member improves the work efficiency even if different.

[0010]

According to the present invention, there is provided a coating film peeling apparatus for coating a resin material on a substrate .
The resin members are placed opposite to each other and
Shear between the resin material and the coating film.
To remove paint film from resin material
Detects the thickness of the resin member that is about to peel the coating film
Gap to adjust the gap between the roll thickness detector and the roll
The gap between the rolls according to the signal from the adjustment unit and the thickness detection unit
And a control unit for adjusting the
The operation switch and the input of this operation switch.
The plate moves forward to supply the resin member to the roll.
And a work supply device .

[0011] According to this configuration, the resin member to be processed even thickness is changed gap between the rolls is adjusted to always optimum state, optimal shear shear stress is applied the coating The removal rate is remarkably improved, and the troublesome work of adjusting the gap between the two rolls each time is not required, so that the coating film peeling processing with extremely high work efficiency can be performed, and the processing capacity is greatly improved.

[0012] The above-mentioned sheet thickness detecting section is provided for the roll.
It is desirable to measure the thickness of the resin member on the upstream side of the roll, provided on the upstream side in the transport direction of the resin member,
A non-contact type sensor is used for the plate thickness detection unit, which makes it possible to easily and accurately measure the thickness of the resin member.

The coating film peeling device includes an operation switch provided apart from the roll, and a work supply device for feeding the resin member toward the roll by pushing the push plate forward by input of the operation switch. It is desirable to have
Thus, the supply of the resin member can be performed automatically and in a continuous operation, and the work supply device can be operated after receiving the input signal of the operation switch and the measurement signal from the plate thickness detection unit. desirable.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the coating film peeling equipment that by the present invention
Will be described as an example the case of recycling recovered resin bumper paint is applied is relatively large parts Of an embodiment of the auto parts of.

FIG. 1 is an explanatory view showing an outline of a method of recycling a coated resin member carried out by the apparatus for peeling a coated resin member according to the present embodiment.

Referring to FIG. 1, an outline of this recycling method will be described. In-process defective products generated during the production and assembly of a resin bumper and bumpers W removed from a scrap car are collected in a resin product collection process a. The metal part is removed, and thereafter, if necessary, the resin member is cut into a resin member Wa having a predetermined width in the next resin product cutting step b.

The coating Wc of the resin member Wa is peeled off from the resin material Wb by a coating peeling device 1 described later in a coating peeling step c.

In the coating film peeling step c, the resin material Wb from which the coating film Wc has been peeled off is pulverized by a shredder or the like in the next pulverizing processing step d to become a pulverized material Wd.

In the following pelletizing step e, the pulverized material Wd is supplied to, for example, an extruder. The extruder advances the pulverized material Wd put in the hopper through a heating cylinder by rotation of a screw, and heats the material by a heater or the like. Then, it is melted while being advanced in the heating cylinder, and is extruded from a die to produce pellets We of a uniform shape. At this time, the remaining coating film pieces and the like are removed by the screen mesh provided at the tip of the heating cylinder. In addition, by automatically replacing the screen mesh, the processing capacity can be increased, and the productivity can be improved.

The pellet We obtained in the pelletizing step e is added with a pellet made of a virgin polypropylene resin or the like as necessary in the next molding step f, and becomes a recycled resin member such as a bumper W again.

In the pelletizing step e, the crushed material W
Although d is pelletized, the pelletizing step e can be omitted if the pulverized material Wd is in a pulverized state, for example, a finely pulverized state.

Next, the coating film peeling apparatus 1 for peeling and removing the coating film Wc from the resin material Wb in the coating film peeling step c will be described with reference to FIGS.

The coating film peeling device 1 is generally composed of a peeling device 1
0, an operation unit 30, a plate thickness detection unit 50, and a gap adjustment unit 70. FIG. 2 is a perspective view showing a main part of the peeling device 10, and FIG. FIG. 4 shows FIG.
5 is a sectional view taken along line AA in FIG. 5, and FIG. 5 is a sectional view taken along line BB in FIG.

As shown in FIGS. 2 and 4, the peeling device 10 includes a coating film-side roll 11 and a resin material-side roll 1 which are disposed to face each other.
The coating-side roll 11 and the resin-material-side roll 12 are made of metal and have a mirror-finished roll surface.
Alternatively, chrome plating is applied, and as shown in FIG. 2, the coating film-side roll 11 is provided on a support frame 13 and rotatably supported between a pair of opposed coating film-side roll support members 11a. Is rotationally driven by the rotary drive device 14 of the.

On the other hand, the resin material-side roll 12 is rotatably supported between a pair of resin material-side roll support members 12a which are vertically movably supported by a support frame 13 by a gap adjusting portion 70, which will be described later. The motor is rotationally driven by a rotary drive device 15 such as a motor with a speed reducer, which is connected via the motor. The resin material-side roll support member 12a is provided with a gap adjustment unit 70 by a signal from a plate thickness detection unit 50 described later.
Is actuated to move up and down so that the gap between the coating film side roll 11 and the resin material side roll 12 is adjusted, and for the rolling to be applied to the resin member Wa in accordance with the thickness of the resin member Wa from which the coating film is removed. The pressing force is adjusted to an optimal state.

Roll 11 on coating film side and roll 12 on resin material side
And the rotational peripheral speed is different from the rotational speed of the resin material side roll 12 pressed against the surface of the resin member Wb.
c, the rotational speed of the coating film-side roll 11 pressed against the surface is large, and the resin member W supplied between the two rolls 11 and 12
As shown in FIG. 6, they are driven to rotate in opposite directions so as to bite a and apply a pressing force.

At a position close to the roll surface of the coating film side roll 11, a scraper 17 for scraping off the coating film adhering to the roll surface of the coating film side roll 11 is provided. The coating film Wc scraped off from the roll surface of the roll 11 is carried out from the coating film peeling device 1 by a belt conveyor (not shown) or the like and collected. Reference numeral 18 denotes, for example, a cloth cleaning material that slides on the surface of the resin material side roll 12 and wipes off dust, coating film pieces, and the like attached to the surface of the roll.

Further, the peeling device 10 includes a work supply device 20 which constitutes a safety device 19 together with an operation unit 30 described later.
And an unloading device 25 for unloading the resin material Wb from which the coating film Wc has been peeled off.

As shown in FIGS. 2 and 4, the work supply device 20 has a front edge 21a located near the coating film-side roll 11 and an opposite coating film between the opposed coating-film-side roll support members 11a. Side roll 11 and resin material side roll 12
And a push plate driving device provided on the rear end edge 21b of the flat portion 21, for example, the air cylinder 22, the air cylinder 22, and the like. A push plate 23 that reciprocates between a forward end position 23a that approaches the coating film side roll 11 along the upper surface of the plane portion 21 due to expansion and contraction and a backward end position 23b that separates from the coating film side roll 11. ing.

The unloading device 25 is provided with the coating film side roll 11.
And a work supply device 20 via a resin member side roll 12
The upper end of the unloading device 25 is inclined near the upper part of the roll surface of the coating film side roll 11 and gradually descends as the distance from the coating film side roll 11 increases, and the lower end is outside the peeling device 10. And a guide member 27 erected at each end of the bottom portion 26, and a resin material W is provided on the bottom portion 26.
b is configured to slide out.

Above an air cylinder 22 provided at the rear end edge 21b of the flat portion 21, a slope 24a is formed so as to gradually descend as it approaches the coating film side roll 11.
And a substantially U-shaped flange portion 24b rising along both side edges and a rear edge of the slope 24a.
Are arranged.

Then, the resin member Wa thrown on the slope 24a of the throwing portion 24 slides down on the slope 24a and falls on the plane portion 21, and the resin member Wa dropped on the plane portion 21 has a sheet thickness. Sensors 51 and 5 as detection unit 50
The sheet thickness is detected by 2 and the air cylinder 22 is extended to push and supply between the coating film side roll 11 and the resin material side roll 12 by the push plate 23 which moves forward from the backward end position 23b to the forward end position 23a. It is configured to be.

As the sensors 51 and 52 of the plate thickness detecting section 50, for example, a non-contact sensor using a visible light laser is attached to the flat section 21 and the support frame 13 as shown in FIG.
The thickness of the resin member Wa passing between the sensors 51 and 52 is instantaneously detected.

The signal from the plate thickness detecting section 50 is immediately sent to the gap adjusting section 70, and the resin member Wa to be processed is processed.
Is automatically adjusted to an optimum gap between rolls for peeling off the coating film, for example, 50% of a plate thickness set in advance by a test or the like.

The gap adjusting unit 70 is a stepping motor 71 which is so-called rotationally driven in accordance with the detection result of the driving unit, for example, the plate thickness detecting unit 50, and is engaged with a pinion by the stepping motor 71 and has a lower end provided with a resin material side supporting member 11a. And a control unit 73 composed of a rack or the like that supports the resin material side roll 12 via the control unit 73.

On the other hand, the operation unit 30 disposed near the input unit 24 of the peeling device 10 has a support frame 31 and an operation box 32 supported by the support frame 31.
As shown in FIG. 5, on the upper surface of the operation box 32, first and second operation switches 33 and 34 and a first emergency stop switch 36 disposed between the operation switches 33 and 34 are spaced apart from each other. A second emergency stop switch 37 is provided below the support frame 31 and is activated by an operator operating a pedal, for example.

Further, the first and second operation switches 33 and 34, the first and second emergency stop switches 3 are provided in the operation box 32 of the operation section 30 or in the peeling device 10.
A control unit (not shown) for controlling the operations of the rotary driving devices 14 and 15 and the air cylinder 22 provided in the peeling device 10 in accordance with the operations of 6 and 37 is provided. FIG.
Indicates the connection relationship among the sensors 51 and 52, the gap adjustment unit 70, the operation switches 33 and 34, and the work supply device 20 described above. That is, the sensors 51, 52 are
A detection signal is sent to a control unit 73 of the work supply device 20 at the same time.
It is configured to send to. The work supply device 20 is configured to receive operation signals from the operation switches 33 and 34 and a control signal from the control unit 73.

Next, an operation method of the coating film peeling apparatus 1 configured as described above will be described.

The operator first enters the loading section 24 of the peeling device 10.
The resin member Wa is loaded on the slope 24a so that the coating film Wc faces the slope 24a.

The loaded resin member Wa slides down on the slope 24a shown in FIG. 4, and as shown in FIG.
It falls on 1 and is introduced. At this time, as shown in FIG. 6, the push plate 23 is retracted to the retreat end position 23b near the rear end edge 21b of the flat portion 21, and the inclined slope 24a
From behind, the operator can visually check the state of the resin member Wa introduced on the plane portion 21.

The resin member Wa dropped on the plane portion 21 is
The plate thickness is detected by sensors 51 and 52 as the plate thickness detecting section 50.

The signal from the sheet thickness detecting section 50 is immediately sent to the control section 73 of the gap adjusting section 70, and the resin material side roll 12 is adjusted up and down by the roll moving section 72 by the operation of the step motor 71. A roll gap between the film-side roll 11 and the resin-material-side roll 12 that is optimal for peeling off the film of the resin member Wa to be peeled, for example, 5 mm thick
Adjust automatically to 0%.

Next, when the operator operates the first and second operation switches 33 and 34, the push plate 23 moves forward from the reverse end position 23b with the extension of the air cylinder 22, and moves on the flat portion 21. The resin member Wa introduced into the substrate is pushed and pushed between the coating film side roll 11 and the resin material side roll 12 to be supplied.

The resin member Wa is pushed by the pressing plate 23 and is reliably pushed into the gap between the coating film side roll 11 and the resin material side roll 12 while moving forward. 12, and a shear shear stress is applied between the resin material Wb and the coating film Wc on the basis of the relative rotational peripheral speed difference between the two rolls 11 and 12 to apply the resin material Wb. The film Wc peels off.

The extension operation of the air cylinder 22 at this time may be performed by receiving a signal from the plate thickness detecting section 50, or may be performed by a signal from the control section 73 of the gap adjusting section 70. The operation may be performed in response to the completion of the gap adjustment.

On the other hand, the resin material Wb from which the coating film Wc has been peeled off
Is sent out onto the inclined bottom portion 26 of the unloading device 25 by the two rolls 11 and 12, slides on the bottom portion 26, is unloaded from the coating film peeling device 1, and is collected. And resin material W
The coating film Wc peeled off from the coating film roll b is adhered to the roll surface of the coating film side roll 11 and conveyed, scraped off from the roll surface of the coating film side roll 11 by the scraper 17, and removed from the coating film peeling device 1 by a belt conveyor or the like. It is carried out and collected.

After the peeling operation for peeling the coating film Wc from the resin material Wb by the cooperation of the peeling roll 11 and the resin material side roll 12 is completed, the operator operates the first operating switch 33 and the second operating switch 34. Is released, that is, when the hands are released from the first operation switch 33 and the second operation switch 34, the operations of the rotary driving devices 14 and 15 are stopped, and the rotation of the coating film side roll 11 and the resin element side roll 12 is stopped. Stops, and the push plate 23 moves backward to the reverse end position 23b and stops.

Next, when another resin member Wa is loaded, the thickness of the resin member Wa dropped on the flat portion 21 is detected by the sensors 51 and 52 as the plate thickness detecting section 50 as described above.

The signal from the sheet thickness detecting section 50 is immediately sent to the control section 73 of the gap adjusting section 70 and readjusted to the optimum gap between the rolls for removing the coating film of the resin member Wa to be processed. .

Next, when the operator operates the first and second operation switches 33 and 34, the push plate 23 moves forward from the reverse end position 23b with the extension of the air cylinder 22, and The resin member Wa introduced into the substrate is pushed and pushed between the coating film side roll 11 and the resin material side roll 12 to be supplied.

The resin member Wa is pushed by the pressing plate 23 and moves forward while moving forward with the coating film side roll 11 and the resin material side roll 1.
2 and is rolled by the pressing force of the coating film side roll 11 and the resin material side roll 12, and based on the difference in the relative rotational peripheral speed between the two rolls 11, 12, the resin material Wb Between the resin member Wb and the coating film Wc.

At this time, the gap between the two rolls 11 and 12 is always adjusted to an optimum state for processing regardless of the thickness of the resin member Wa. A certain shear shear stress acts between the force and the resin material Wb and the coating film Wc, and the coating film peels in a stable state.

According to the embodiment of the present invention described above, a coated resin member is rolled between rolls which are arranged opposite to each other and have different rotational peripheral speeds, and a shearing slip is caused between the resin material and the coating film. In a coating film peeling apparatus and method for applying a stress to peel a coating film from a resin material, a thickness detecting means for detecting a thickness of a resin member in advance prior to peeling of the coating film is provided, and a thickness detecting means is provided. The gap between the two rolls is automatically adjusted automatically to adjust the gap between the two rolls. The gap between the two rolls is always optimal even if the thickness of the resin member to be processed changes. The removal rate of the coating film is greatly improved, and the troublesome work of adjusting the gap between the two rolls each time becomes unnecessary. Can greatly increase processing capacity .

The present invention is not limited to the above-described embodiment. For example, the sensors 51 and 52
The present invention is not limited to a non-contact sensor using a visible light laser, but can be variously modified, for example, using another non-contact thickness measuring device, or a contact-type sensor that measures by contacting a detection member with a resin member.

[0055] According <br/> to by that the coating film peeling equipment in the present invention described above, the gap between the even thickness of the resin member to be processed is changed roll automatic always optimal state Is adjusted. The configuration that applies the optimal shear shear stress between the resin material and the coating film significantly improves the removal rate of the coating film, and also involves the troublesome work of adjusting the gap between both rolls each time. This is unnecessary, and the coating film can be removed with extremely high working efficiency, and the processing capacity is greatly improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an outline of a method of recycling a coated resin member for explaining an embodiment of an apparatus for peeling a coated resin member according to the present invention.

FIG. 2 is a perspective view showing a main part of the coating film peeling device.

FIG. 3 is a plan view of the coating film peeling device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a diagram illustrating the operation of the coating film peeling device.

FIG. 7 is a block diagram illustrating the operation of the coating film peeling device.

FIG. 8 is a diagram illustrating a conventional coating film peeling apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coating film peeling device 10 peeling device 11 coating film side roll 12 resin material side roll 19 safety device 20 work supply device 23 push plate 24 input section 24a slope 33 first operation switch 34 second operation switch 36 first Emergency stop switch 37 Second emergency stop switch 50 Plate thickness detection unit 51, 52 Sensor 70 Gap adjustment unit 71 Step motor 72 Roll moving unit 73 Control member Wa Resin member Wb Resin material Wc Coating

Claims (3)

(57) [Claims] Claims: 1. A resin member having a resin material coated thereon,
Rolling is performed between rolls that are arranged opposite to each other and have different rotational peripheral speeds, and a coating film peeling device that applies shear shear stress between the resin material and the coating film to peel the coating film from the resin material A thickness detection unit for detecting the thickness of the resin member, a gap adjustment unit for adjusting the gap between the rolls, a control unit for adjusting the gap between the rolls based on a signal from the thickness detection unit, and the roll Operating switch installed at a distance from
And the push plate moves forward by the input of this operation switch.
And a work supply device for supplying a resin member toward the roll . 2. The work supply device according to claim 1, wherein
Input signal of the switch and the measurement signal from the thickness detector.
2. The coating of claim 1, wherein the coating is activated after the coating.
Stripping device. 3. The work supply device according to claim 1, wherein
Switch and an adjustment end signal from the control unit.
3. The method according to claim 1 or 2, characterized in that the actuation is carried out after the beam is struck.
The coating film stripping apparatus according to the above.