JP2003200349A - Coating removing method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating removing method and device that use a blasting method safely and productively, can handle an amorphous treated object and can easily remove a coating thereon. <P>SOLUTION: The coating removing device 1 comprises a coating scratcher 10 having a punch or a die for scratching a painted surface of a treated object C where a coating P is applied to a surface of base metal M, a coating peeler 30 having a nozzle 370 for projecting or jetting projectiles G at the scratched painted surface of the treated object Ca with the coating P scratched to peel the scratched coating Pa, a cleaner 40 having a nozzle 430 for jetting a cleaning material for cleaning the surface of the base metal M from which the coating Pa is peeled, and a dust collector 50 for suctioning and storing dust discharged from the coating peeler 30 and cleaner 40. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating which safely and efficiently removes the coating material in order to recycle a member, which is an object to be treated, whose surface is coated with a high quality material. The present invention relates to a removing method and an apparatus thereof.

[0002]

2. Description of the Related Art Video cameras, notebook computers, MDs
(Mini disk) Non-ferrous metals, resins, etc., which have a low specific gravity, are used as the base material for exterior parts of portable electronic devices such as players. And on the surface of these exterior parts,
In order to improve corrosion resistance and the like, it is usually coated as a surface treatment. In the case of recycling a member such as an exterior product which is such an object to be processed, if the member is melted with the coating applied, the dissolution yield and quality are deteriorated, and therefore the coating must be removed.

The base material of the coated member includes non-ferrous metal such as magnesium alloy, aluminum alloy and titanium alloy, and resin material such as carbon fiber reinforced engineering plastic, and these members are to be recycled.

The coating includes acrylic coating and epoxy resin coating, but the coating to be removed is not specified.

In the following description, a magnesium alloy will be described as an example of the base material. Energy required for manufacturing a recycled ingot of a magnesium alloy is about 3% of that of a virgin ingot, which is equal to that of an aluminum alloy and is a metal having excellent recyclability. With magnesium alloy die casting, only about 50% of the purchased ingot is shipped as the final casting. Clean scraps generated during die casting are remelted and recycled in the die casting factory. After die casting, the surface-treated coated material is rarely recycled. Considering the future increase in demand, it is an urgent task to establish the recycling technology. The conventional paint removal methods are: 1. Chemical removal method, 2. Thermal removal method, 3. There is a mechanical removal method. These methods are briefly described below. 1. Chemical removal method This chemical removal method is a method of removing the coating by applying a chemical to the coated surface of the member or immersing the member in the chemical. A method to remove paint by applying a paint remover. In order to remove the coating in a short time using the former method, it is necessary to use a powerful drug such as sulfuric acid or nitric acid. 2. Mechanical Removal Method This mechanical removal method is a method of removing the coating by blasting a projection material such as metal particles such as steel particles, zinc particles, and aluminum particles onto the surface of the coating at high speed.

Such a blast material is hard metal particles, and a method of removing the coating using the blast material is disclosed in JP-A-7-6-.
1611. In this paint removal method using hard metal particles, the base material may also be ground by the metal particles.

In order to prevent the grinding of the base material, it is possible to solve it by projecting a soft projection material such as plastic particles or plant particles onto the coated surface at a high speed. When a soft shot material is used, the base material is not removed together with the coating, so the risk of dust explosion is low and the recycling rate is not reduced. 3. Thermal Removal Method This thermal removal method is, as disclosed in Japanese Patent Application Laid-Open No. 7-188798, a method in which the entire member is heated at a heating temperature of 300 ° C. or higher and a melting point of the base material or lower to burn and remove the coating. Is.

[0008] It has been attempted to recycle the members by melting and casting without removing the paint {Magazine "Resources and Materials" 115 (1999) No. 3 Change in properties of recycled material from die-cast painted parts made of AZ91D magnesium alloy by adding manganese}.

[0009]

However, these paint removing methods have problems in securing a safe working environment and productivity as described below. That is, in the above-mentioned chemical removal method, it is necessary to ensure the safety of the working environment and to treat the waste liquid, and therefore the equipment investment amount and running cost are high. Further, when a neutral coating remover is used, it takes 5 to 6 hours to remove the stripping agent, so that there is a problem that productivity is inferior.

In the mechanical removing method, the base material may be ground by the hard shot material. Since the removed base material causes dust explosion, it is necessary to ensure the safety of the working environment, resulting in high capital investment. There is also a problem that the recycled rate is lowered because the ground base material is not recycled.

When a soft shot material is used, there are the above-mentioned advantages, but since it takes time to remove the coating by the soft shot material as compared with the hard shot material, there is a problem that productivity is inferior.

Further, in the above-mentioned thermal removal method, a large amount of energy is required for heating, and since harmful gas is generated by painting or the like, it is necessary to treat smoke and secure the safety of the working environment. However, there is a problem that running cost becomes high.

Furthermore, in the method of recycling the above-mentioned member by melting and casting, Fe, Ni, Cr,
Since Cu is expected to be mixed in and Cu components cannot be removed,
Cannot meet the JIS standard. The yield of recycled materials is as low as 60 to 75%, and there is a problem that harmful gas is generated from painting.

Therefore, the present invention uses a blasting method, is safe, has high productivity, can handle an object having an irregular shape, and can easily remove the coating, and a method of removing the coating. The purpose is to obtain a device.

The blast processing is a processing method utilizing the effect obtained by accelerating a particulate projection material to fly it in space and collide it with the surface of an object to be processed. There are roughly two methods for blasting. That is, (1) injection method: a method of injecting particles from a nozzle using the injection force of compressed gas.

(2) Projection method: A method of projecting particles with a high-speed rotor.

Further, these two methods include a dry type in which a particulate blast material is sprayed as it is and a wet type in which a blast material is mixed with a liquid such as water and sprayed. In the present invention, the blasting method is not limited.

[0018]

SUMMARY OF THE INVENTION Therefore, according to the method for removing coating of the present invention, after the surface of the base material is scratched on the coating of the object to be treated, the base material is softer than the base material. The problem is solved by adopting a method of removing the coating by projecting a projectile material such as a plastic grain or a plant grain at a high speed.

[0019] The scratches in the coating of the object to be treated are dot-like scratches,
Scratching may be performed by plastic deformation such as linear scratches or cracks such as circular or linear scratches on the object to be processed. Also,
The coating may be treated to weaken or break the coating crosslinks by heating. Furthermore, the method of removing the coating may be carried out by combining the mechanical damage such as spot-like, linear scratches and cracks with the heating of the surface to be scratched.

By air-blowing the surface of the base material after removing the coating of the object to be processed, it is possible to remove the coating pieces, the shot material, and the crushed shot pieces adhering to the surface.

Further, in the paint removing device of the present invention, a paint scratching device equipped with a punch or a mold for scratching the painted surface of the object whose surface is coated with the base material, and the paint scratching device. A coating stripping device equipped with a nozzle for projecting or spraying a projection material onto the scratched coating surface of the placed object to remove the scratched coating, and cleaning the surface of the base material from which the coating has been stripped A cleaning device having a nozzle for injecting a cleaning material, and a dust collecting device that sucks and discharges dust discharged from the coating stripping device and the cleaning device,
The above problems are solved.

A projectile material projected or jetted by the coating stripping device, a used projectile material crushed by hitting the object to be treated, and the coating material of the stripped coating material are collected and used for stripping the coating material. Relatively large particles are supplied to the nozzle again, and fine particles are collected by the dust collector.

Therefore, according to the paint removing method of the present invention,
After mechanically damaging the coating on the surface of the object to be treated, the coating can be easily removed by projecting plastic particles, plant particles, etc., which are softer than the base material, onto the coating part at high speed. Moreover, by air blowing the base material after removing the coating material, it is possible to increase the recycling rate of the base material, excluding the paint pieces, the shot material, and the crushed shot material adhering to the surface of the base material. Moreover, the used blast material can be reused, and the coated particles of other fine particles, the blast material, and the crushed blast material can be collected.

By disposing the dismantling work equipment in the vicinity of the paint removing apparatus of the present invention, the work efficiency can be greatly improved.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION A paint removing method and an apparatus therefor according to an embodiment of the present invention will be described below with reference to the drawings. In addition,
Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are attached, but unless otherwise stated, they limit these aspects. Please note that it is not limited to.

FIG. 1 is a cross-sectional view of an exterior article with a coating which is one of the objects to be coated according to the present invention, and FIG. 2 is a schematic configuration diagram of a coating removing apparatus according to an embodiment of the present invention. 3 shows a process flow of the coating removing method of the present invention, FIG. 4 shows the surface of the object to be treated that has been given dot-like scratches, FIG. A is its plan view, and FIG. A cross-sectional view taken along the line AA,
FIG. 5 shows the surface of the object to be treated that has been linearly scratched, FIG. 5A is a plan view thereof, FIG. 5B is a cross-sectional view taken along the line AA of FIG. 4 is a schematic cross-sectional view of a paint scratching device for making a dot-like scratch, and FIG. 7 is a paint scratching device for making a linear scratch shown in FIG. Is a schematic cross-sectional view thereof, and FIG. B is BB of FIG.
8 is a cross-sectional view taken along the line, FIG. 8 shows the surface of the object to be processed that is circularly cracked, and FIG. 8A is a plan view thereof.
FIG. 9B is a cross-sectional view taken along the line AA in FIG. 9A, and FIG. 9 shows the surface of the object to be treated that has been subjected to linear cracks and scratches, and FIG. 11 is a cross-sectional view taken along the line AA in FIG. 10A, FIG. 10 is a schematic cross-sectional view of the linear crack insertion device for performing the linear crack insertion shown in FIG. 9, and FIG.
1 is a schematic sectional view of a rolling scratching device for rolling scratches on the surface of an object to be processed, FIG. 12 is a schematic cross-sectional view of a cracking scratching device by projecting a hard ball which is one of the projection materials, FIG.
3 is a schematic cross-sectional view of the suction nozzle device, FIG. 14 is a schematic cross-sectional view of a coating heating device that removes by heating the coating of the object to be treated, and FIG. 15 is a coating stripping device that constitutes the coating removing device shown in FIG. FIG. 16 is a schematic cross-sectional view, and FIG. 16 is a schematic cross-sectional view of a cleaning device for an object to be processed which constitutes the paint removing device shown in FIG.

In FIG. 1, reference symbol M is an object to be processed,
For example, it refers to the exterior part of a notebook computer with paint. The coating C is applied to the surface of the base material M of the exterior component C. The coating P is performed after cleaning the surface of the base material M such as an oxide film and processing oil with stains and applying a rust preventive treatment.

FIG. 2 is a schematic sectional view showing a paint removing apparatus according to an embodiment of the present invention. The paint removing device 1 is composed of a paint scratching device 10, a paint removing device 30, a cleaning device 40, and a dust collecting device 50, which are main parts.

The dismantling work of the discarded notebook type personal computer may be carried out at different places. However, when it is better to carry out the integrated recycling work at the same place, as shown in FIG. 2, it is necessary. Depending on the situation, the dismantling work facility 60 may be provided on the upstream side of the coating scratching device 10. The dismantling work facility 60 is provided with a required number of sorting collection boxes such as a board collection box 62 and a keyboard collection box 63 centering on the disassembly work table 61. Further, the paint-exfoliated exterior article Cb is collected in the paint-exfoliated exterior article collection box 64.

At the dismantling work facility 60 in the previous process, the discarded notebook type personal computer loosens the fixing screws and the like by the worker, and the electronic circuit board, keyboard, storage device, wiring, terminals,
Remove exterior parts and dismantle. The disassembled electronic circuit board is housed in the board collecting box 52, the keyboard is housed in the keyboard collecting box 53, and other parts are housed in respective sorting collecting boxes (not shown).

The coated exterior article C taken out by the operator is
It is placed on an endless stainless mesh conveyor (hereinafter simply referred to as "conveyor") 11 that moves from the front position side of the entrance of the paint scratching device 10 to the inside thereof, changes direction at the exit side and returns to the entrance side. . Then, the surface of the exterior article C is scratched at a predetermined position in the paint scratching device 10. The structure of the paint scratching device 10 will be described later.

The damaged exterior product Ca is carried into the paint removing device 30 located downstream. The scratched exterior product Ca is blasted by projecting a shot material such as a plastic grain or a plant grain that is softer than the base material in the paint scratching device 10, and the surface coating is removed.

The coating-removed exterior product Cb (base material M) in which the coating P has been removed from the scratched exterior product Ca is washed in the cleaning device 40, and the coating-removed recovery box 60 arranged on the unloading side thereof. It is housed in and collected.

A projection material projected by the coating stripping device 30,
The dust of the coating P removed by the shot material is collected by the dust collector 50.

When the coating P is removed by peeling or the like, the shielding plate has a structure that blocks the opening so that the projection material and the like do not flow in the front and rear processes. Similarly, when the coating-removed exterior component Cb is washed, the shielding plate has a structure that closes the opening so that paint pieces and the like do not flow to the front and rear processes. Illustration of the structure of any shielding plate is omitted.

As described briefly above, the process flow of the method for removing the coating material of the exterior component C is roughly divided into the coating scratching step S1 performed by the coating scratching device 10 as shown in FIG.
Paint removing step S2 performed by the paint removing device 30, cleaning device 4
The cleaning process S3 is performed at 0.

By scratching the coating P of the exterior article C in the coating scratching step S1, the coating P can be peeled off in a short time.

In the paint removing step S2, the paint is removed by blasting or the like.

In the cleaning step S3, the exterior product C with the paint removed
By air-blowing b, the coated pieces, shot particles, and crushed shot pieces are removed.

Next, the details of the step of damaging the coating P will be described.

In FIG. 4, the dot-like scratches D on the coating P surface of the exterior component C
5 shows a state in which a linear scratch L is put on the coating P surface of the exterior article C in FIG. In both of these examples, only the coating P is scratched and the base material M is not positively deformed.
Although the depths of the scratches D and the scratches L are not specified, it is preferable that they reach the base material M in order to remove the coating P. The smaller pitch of the scratches D or the scratches L is preferable for removing the coating P.

FIG. 6 shows a paint scratching device 10A for inserting a dot scratch D. The paint scratching device 10A includes a conveyor 110, a load receiving plate 120, and a punch device 13.
0, and a control device 140.

The load receiving plate 120 is fixed on a horizontal plate such as the bottom surface of the paint scratching device 10A.

The conveyor 110 is made of stainless mesh and has an endless structure as described above.
The exterior article C placed on and carried in is stopped at the position of the upper surface of the load receiving plate 120. The positioning of the exterior component C on the load receiving plate 120 is performed by the control device 14
It is done at zero.

The punch device 130 includes a punch 131 having a round bar shape whose lower end is formed in an inverted conical shape, and the punch 1
A support plate 132 for supporting the movable body 31 in a vertically movable state, a housing 134 fixed below the support plate 132 and provided with linear guides 133 at upper and lower inner ends, respectively, and a lower end of the housing 134. The punch 131 includes a compression coil spring 136 interposed between the flange 135 and the flange 135, and a stopper 137 fixed to the upper end of the punch 131 and protruding upward from the support plate 132.

The punch 131 is inserted into a through hole formed in the support plate 132 and slightly larger than the diameter of the punch 131. The punch 131 has a linear guide 133,
It is supported by a linear guide 133 in the housing 134 so that it can smoothly slide in the vertical direction. It is composed of a mechanism capable of absorbing the difference in height of the outer package C. The stopper 137 prevents the punch 131 from coming off. Punch 13
In the case where 1 makes a point-like scratch on the coating P surface of the exterior component C, the excessive weight is determined by the compression coil spring 136 and the lowered position.

A paint scratching device 10 constructed as described above.
When the exterior article C is carried into A by the conveyor 110,
The outer package C is detected by a limit switch (not shown), and driving of the conveyor 110 is stopped. The support plate 132 then descends, and therefore the punch 131 descends. The load and the descending speed of the punch are selected so that they are enough to damage the coating P and do not positively damage the base material M. As described above, the load is the compression coil spring 136.
And the descending position. The support plate 132 is connected to a linear guide and an air cylinder (not shown),
Exercise vertically. At the same time, many spot-like scratches on the painted surface D
A plurality of punches 131 are arranged on the support plate 132 in order to insert the holes. If there is enough time, the support plate 132 may be moved in a plane and moved up and down to repeat the scratching of the dot-like scratches D.

Such operation of the punch device 130 is performed by the control device 140 having a built-in computer.

Next, the paint scratching device 10B for inserting the linear scratch L shown in FIG. 5 will be described with reference to FIG. It should be noted that the paint scratching device 10 shown in FIG.
The same structures and components as those of A are designated by the same reference numerals, and their description will be omitted.

The paint scratching device 10B is provided on the conveyor 1
10, load receiving plate 120, blade device 160,
And a control device 140.

The load receiving plate 120 is fixed on a horizontal plate such as the bottom surface of the paint scratching device 10B.

As described above, the conveyor 110 is made of stainless mesh, and the exterior product C is carried into the coating flaw-introducing device 10B by the conveyor 110, and the carried exterior product C is introduced.
Is stopped at the position of the upper surface of the load receiving plate 120.
The positioning of the exterior component C on the load receiving plate 120 is performed by the control device 140.

The blade device 160 includes a blade 161,
Support plate 162, pair of shafts 163, pair of linear guides 164, compression coil spring 165, stopper 1
66 and the like.

The blade 161 has a predetermined width, and its cross section is V-shaped as shown in FIG. 7B. A pair of shafts 163 are vertically attached to the upper surfaces of both ends of the blade 161.

The blade 161 is supported by the support plate 162. The supporting structure is as follows. The support plate 162 is a member having an L-shaped cross section, and linear guides 164 are fixed to both ends of the horizontal plate portion 1621 by screws or the like, and the linear guides 164 are fixed to the blade 161. The pair of shafts 163 are respectively inserted, and the upper end portions of the respective shafts 163 protruding to the horizontal plate portion 1621 of the support plate 162 are adjusted by the stoppers 166, respectively.
It is fixed to prevent the shaft 163 from coming off. A compression coil spring 165 is attached to each portion of the shaft 163 existing between the lower end of the linear guide 164 and the upper end of the blade 161.

The blade 161 includes a pair of shafts 163.
Can move up and down in the linear guide 164, and can absorb the height difference of the exterior article C carried in by the conveyor 110. The blade 161 is guided by a linear guide 164, and is vertically driven by an air cylinder (not shown) connected to the linear guide 164.

Next, with the blade device 160 constructed as described above, a linear scratch L is formed on the coating P surface of the exterior article C.
The operation of putting in will be described.

First, the limit switch (not shown) detects the exterior article C on the conveyed conveyor 110,
The driving of the conveyor 110 is stopped. A load receiving plate 120 is arranged below the conveyor 110 at the scratching position, as in the case of the coating scratching device 10A shown in FIG.

Next, the support plate 162 and the blade 161 are lowered. The load and the descending speed of the blade 161 are selected such that they are sufficient to damage the coating P of the exterior component C and do not positively damage the base material M.
The load is determined by the compression coil spring 165 and the lowered position.
Thus, it is possible to form a linear scratch L on the coating P surface of the exterior component C, as shown in FIG.

At the same time, in order to insert many linear scratches L on the coating P surface, the blade device 160 is provided with a plurality of blades 16.
1 is provided.

If the linear scratch L has time to spare, the support plate 162 may be moved in a plane and moved up and down to repeat the linear scratch. .

Further, as another method for inserting the linear scratch L, the punch 131 shown in FIG. 6 is lowered to support the point P scratch D on the coating P surface of the exterior article C. By moving the plate 132 to a flat surface, it is possible to insert a linear scratch L.

In the above description, in order to remove (separate) the coating P of the exterior article C, the coating scratching device 10A or 10 is used.
Using B, the spot-like scratches D on the coating P surface of the exterior product C, respectively.
Alternatively, a method has been adopted in which a linear scratch L is inserted to facilitate the peeling of the coating P. However, in order to remove (peel) the coating P, in addition to these methods, the surface of the exterior article C may be removed. You may go with cracks.

FIG. 8 shows an outer package C having a circular crack S on its surface and a linear crack V on FIG. In these two cases,
By actively plastically deforming the base material M, cracks S and V are introduced into the coating P. Although the depths of the cracks S and V are not specified, it is preferable that they reach the base material in order to remove the coating P. The smaller the pitch of the cracks S and V, the better for removing the paint. However, it is necessary that the blasting process for removing paint, which is a post-process, and the air blowing do not hinder the removal of the coated pieces, shot particles, and crushed shot material.

The circular crack S shown in FIG. 8 can be scratched by using a punch having a spherical tip instead of the punch 131 of the paint scratching device 10A shown in FIG. 6, for example.

To insert the linear crack V shown in FIG.
Paint scratching device 1 of the third embodiment as shown in FIG.
It is recommended to use 0C. Below, this paint scratching device 10C
The configuration of will be described.

The paint scratching device 10C comprises a cracking scratching device 170 and a control device 140. The crack insertion device 170 is mainly composed of a fixed die 171 and a push die 173.

The fixed die 171 is a die having a V-shaped cross section and a predetermined number of V grooves 172 formed on the upper surface thereof in parallel to each other. The stationary die 171 is placed on a horizontal plate such as the bottom surface of the paint scratching device 10C. It is fixed.

The pressing die 173 is the V groove 172 of the fixed die 171.
A required number of V-shaped ridges 174 having a V-shaped cross section and substantially the same length as the length of the V-shaped groove 172 are formed in parallel with each other, and are fixed to the movable plate 175 with screws or the like. This movable plate 175 is a paint scratching device 1
It is attached to a pair of left and right rails 177 fixed to a vertical fixing plate 176 such as a 0C side plate, and linear guides 178 that slide on the rails 177, respectively.

The means for moving the movable plate 175 up and down is, for example, a hydraulic cylinder 179. The hydraulic cylinder 179 is supported and fixed to the horizontal plate of the L-shaped support plate 181 which is fixed to the vertical fixed plate 176. The plunger 180 of the hydraulic cylinder 179 is attached to a horizontal plate of an L-shaped attachment plate 182 which is fixed above the movable plate 175 with a screw or the like.

A paint scratching device 10 constructed as described above.
When the linear crack V is put on the coating P surface of the exterior article C by using C, first, the exterior article C is carried into the crack entry device 170 by the conveyor 110 (FIG. 2). The delivered exterior parts C are detected by a limit switch (not shown),
The driving of the conveyor 110 is stopped. After that, the exterior article C is set on the fixed die 171 with a pick (not shown) having a suction pad.

Next, the hydraulic cylinder 179 operates under the control device 140, the plunger 180 projects downward, and the pressing die 173 including the movable plate 175 is guided by the linear guide 164 and the rail 177 and descends. The load and the descending speed of the pressing die 173 are selected so that the base material M is plastically deformed but not cut. The load is determined by the sectional area of the hydraulic cylinder 179 and the pressure setting value. When the linear crack V enters the exterior part C, the push die 173 is moved to the hydraulic cylinder 1.
79 raises to the original upper position. After that, such an operation is repeated, and the linear cracks V are put in the exterior products C which are successively carried in.

If the shapes of the fixed die 171 and the push die 173 are changed, a circular crack S can be inserted.

FIG. 11 shows a paint scratching device 10D of the fourth embodiment. The paint scratching device 10D is a rolling scratching device and includes a roller 190 and a load receiving plate 192.

Various projections 191 are formed on the surface of the roller 190.
Is provided. Depending on the shape and arrangement of the protrusions 191,
The scratch shape may be a dot shape, a linear shape, a knurled shape, or the like.

The load receiving plate 192 is a flat plate and is fixed on a horizontal plate such as the bottom plate of the paint scratching device 10D.

When the exterior product C is to be damaged by using the coating damage producing device 10D, the exterior product C to be processed is loaded on the conveyor 110 (not shown). While moving the exterior article C that has been carried in, by rolling the roller 190 on the surface of the exterior article C, for example, at a constant speed in the direction of arrow A, damage such as the above-mentioned point, line, or knurl You can If necessary, the exterior component C may be fixed at the time of scratching.

Next, FIG. 12 shows a paint scratching device 10E of the fifth embodiment. The paint scratching device 10E is a crack scratching device that cracks by projecting a hard ball B onto the paint P surface by centrifugal projection. The paint scratching device 10E is a rotating body in which an impeller 201 and a blade 202 are provided in the center of a disc 200. The deflector 203 on the outer side of the impeller 201 is fixed although some window directions can be adjusted.

As for the operation of the paint scratching apparatus 10E, the hard sphere B supplied to the center is deflected from the window of the impeller 201 by the centrifugal force of the rotation of the disk 200.
3 is supplied to the base of the blade 202 through the window of the deflector 203 and projected from the tip of the blade onto the surface of the exterior article C carried in by the conveyor 110.

By adjusting the projection speed, the projection time, the distance, etc. of the hard sphere B, the coating P surface of the exterior article C can be cracked and the base material M cannot be scraped (the base material M is deformed. Select the conditions.

The coating scratching device 10D has a structure in which the shielding plate blocks the opening so that the hard balls B are not scattered. Then, the hard balls B gather at the bottom of the closed chamber. A bucket elevator (not shown) is used to collect the collected hard balls B.

As described above, the hard ball B is used as an example of the shot material. The projection material may have a polygonal shape as long as the base material is not shaved and the coated surface is cracked. The blasting method is not limited.

FIG. 13 shows a paint scratching device 10F of the sixth embodiment. The paint scratching device 10F is a suction nozzle device 210. This suction type nozzle device 21
Reference numeral 0 includes a nozzle body 211, an air jet 212, and a nozzle tip 213. Compressed air into an air jet 2
When jetting from 12 through the nozzle tip 213, a negative pressure is generated inside the nozzle body 211 (near reference numeral 225),
The shot material G sucked from the suction port 224 is used for the nozzle tip 2
Eject from 13.

Also, the following coating P corresponding to scratching
There is a paint scratching device 10G of the seventh embodiment for scratching or peeling. This is due to the coating heating device 220 as shown in FIG. This coating heating device 22
0 includes, for example, a ceramic heater.

Exterior article C carried in by the conveyor 110
Heats the ceramic heater only on the surface of the coating P to weaken or break the cross-linking of the coating P. Although not shown, the entire heating step is surrounded and organic substances that may evaporate are sucked and collected. The heating method of the coating P does not matter.

Next, with reference to FIG. 15, the paint peeling apparatus 30 arranged in the paint P peeling step will be described.

This paint removing device 30 is used in the cabinet 3
10, a stripping chamber 320 provided inside the cabinet 310, a pedestal 321 provided in the middle of the stripping chamber 320, and a funnel-shaped recovery receiver 330 provided below the stripping chamber 320, A tank 340 in which a funnel-shaped partial bottom portion 341 is fitted above the cabinet 310 and a recovery receiver 33.
0 bottom 331 and the pipe 350 connected to the side surface of the tank 340, and the pipe 3 connected to the upper end of the tank 340.
51, the tank 3 connected to the pipe 351 through the side surface of the tank 340 connected to the pipe 350
A partition plate 342 arranged so as to extend downward from the upper part of 40, a dust collecting device 50 connected to the other end of the pipe 351, and a bottom part 341 of the tank 340 are connected via a hose 371. Nozzle 370, its nozzle 370
And a hose 372 for supplying compressed air to.

Next, the operation of the coating stripping apparatus 30 having such a configuration will be described. First, the tank 340
A predetermined amount of, for example, granular projection material G is stored therein.

Next, the exterior component Ca that has been damaged by the conveyor 110 is carried onto the pedestal 321 in the cabinet 310, detected by a limit switch (not shown), the drive of the conveyor 110 is stopped, and the cabinet The carry-in port of 310 is closed with a shielding plate 311.

The shot material G in the tank 340 falls by gravity into the nozzle 370 via the hose 371. Then, compressed air is supplied from the hose 372, and the nozzle 370 is operated to coat the projection material G with a coating damage.
It is projected on the surface of, and the scratched coating P is peeled off.

The shot material G that has been shot, the used shot material Ga that has been shot and crushed, and the coating P that has been peeled off are collected in a collection receiver 330 below the receiving table 321. A suction airflow is generated by operating the dust collector 50, and the suction airflow acts on the collection receiver 330 to collect the blast material G, the blast material Ga that has been crushed by blasting, and the peeled coating P.
Is sucked up and is pneumatically transported to the tank 340 via the pipe 350. The tank 340 has a kind of cyclone structure, and the finely crushed shot material Ga and the peeled coating piece Pa are centrifugally classified and collected by the dust collecting device 50 via the pipe 351. The reusable blast material G is stored in the lower portion of the tank 340, flows into the nozzle 370 again via the hose 371, and is used for peeling the coating Pa.

The paint peeling conditions are the material of the shot material used,
It depends on the particle size, shape, speed of jetting or projection, density, angle, distance, time, etc., and on the type and thickness of coating. By blasting the shot material G such as plastic particles or plant particles that are softer than the base material M at high speed, it is possible to find the condition for peeling the coating P without scraping the base material.
A mechanism (not shown) for moving the nozzle 370 is adopted as necessary depending on the painting area and painting position. When the peeling time is limited, a plurality of nozzles 370 may be adopted.

Next, the cleaning device 30 used in the cleaning step will be described with reference to FIG. This cleaning device 30
Is a cabinet 410 and a shielding plate 41 that closes the carry-in port
1. A cleaning chamber 420 provided in an intermediate portion of the cabinet 410, a pedestal 421 disposed at a position lateral to the shielding plate 411 in the cleaning chamber 420, and an air blow nozzle disposed above the pedestal 421. 430, an air tube 431 connected to the air blow nozzle 430, a pipe 440 connected from the bottom portion 421 of the cleaning chamber 420 to the dust collector 50, and the like.

Next, the operation of the cleaning device 40 thus constructed will be described.

First, the shield plate 411 is opened, and the conveyor 11
At 0, the exterior product Cb with the peeled paint is carried into the cleaning chamber 420, and the exterior product Cb with the peeled paint is detected by a limit switch (not shown) on the pedestal 421 to convey the conveyor 110.
Is stopped, and the carry-in port is closed with the shielding plate 411.

Thereafter, the compressed air is supplied to the air tube 431.
It is sprayed from the air blow nozzle 430 to the coating-exfoliated exterior article Cb via. There is a possibility that the blast material G, the crushed blast material Ga, and the peeled paint piece Pa may remain on the surface of the paint-exfoliated exterior article Cb, though in a small amount. The blast material G from the exterior article Cb and the crushed blast material G by the flow of compressed air
a, the peeled coating pieces Pa gather in the lower part of the cleaning chamber 420. By causing the suction airflow of the dust collector 50 to act on the lower portion of the cleaning chamber 420, the blast material G and the crushed blast material G
a, the peeled paint piece Pa is sucked up, and the tank 340 above the paint peeling apparatus 20 is passed through the pipe 440.
Air transport to. The finely crushed shot material Ca and the peeled paint piece Pa are centrifugally classified and sent to the dust collector 50 via the pipe 351.

The washed exterior parts Cb are collected in the paint-exfoliated exterior parts collection box 64 for recycling.

Depending on the coating area and coating position of the exterior component C, the air blow nozzle 430 may be moved as necessary by using a driving device. Further, when the cleaning time is limited, it is effective to use a plurality of air blow nozzles 430. Furthermore, if a reduction in the yield of dissolution and a reduction in quality when recycling the base material M are allowed, this cleaning step may be omitted. Incidentally, the transport device,
The mechanism of the dust collecting device does not matter in the present invention.

[0099]

As described above, according to the present invention, 1. A safe working environment can be ensured. No dust is generated in the base material, so there is no possibility of dust explosion. It is safe because it does not use a deleterious substance. It does not burn paint, so it is safe because there is little or no harmful gas. 2 ． Removal of paint The amount of base material to be removed can be significantly reduced even if the base material is scraped when removing the paint. Remove the paint,
Since the base material is hardly ground, the recycling rate of the base material is high. Since it is a dry process, it is not a chemical method and no waste liquid treatment is required. After the peeling and removal, the base material can be cleaned only by air blow, which is a dry process. 3. No waste liquid treatment is required in the cleaning process, so equipment investment and running costs can be reduced. The amount of energy used is smaller than that of the thermal treatment method.When only scratching is performed, it is normal temperature treatment, so less energy is required to burn the paint, and the purpose is to weaken the coating cross-linking on the paint surface or to cut it. Less energy to burn paint because it heats to 5. The removal time can be shortened by adding scratches or the like to the high-productivity surface-area paint. 6. It is possible to deal with indefinite 3-dimensional shapes. There is no restriction on the installation location of various devices. Since this paint removal device is relatively small and requires a small scale investment, it can be installed in small factories such as dismantling factories such as personal computers. Of course, it can be installed in a factory that recycles the base material, and it has many excellent effects.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an exterior article with a coating which is one of the objects to be removed according to the present invention.

FIG. 2 is a schematic configuration diagram of a paint removing device according to an embodiment of the present invention.

FIG. 3 is a process flow of the coating removing method of the present invention.

4A and 4B show a surface of an object to be treated in which dot-like scratches have been made, FIG. 4A is a plan view thereof, and FIG.
It is sectional drawing on the A line.

5A and 5B show a surface of an object to be treated which is linearly scratched, and FIG. 5A is a plan view thereof, and FIG. 5B is A- of FIG.
It is sectional drawing on the A line.

FIG. 6 is a schematic cross-sectional view of a paint scratching device shown in FIG. 4 for performing dot scratching.

7 is a coating scratching device for performing the linear scratches shown in FIG. 5, FIG. A being a schematic sectional view thereof, and FIG.
FIG. 4B is a sectional view taken along line BB of FIG.

8A and 8B show a surface of an object to be processed which is circularly cracked, FIG. 8A is a plan view thereof, and FIG. 8B is a sectional view taken along line AA of FIG.

9A and 9B show a surface of an object to be treated which is linearly cracked and scratched, and FIG. 9A is a plan view thereof, and FIG. 9B is a sectional view taken along line AA of FIG. 9A.

FIG. 10 is a schematic cross-sectional view of the linear crack insertion device for performing linear crack insertion shown in FIG.

FIG. 11 is a schematic cross-sectional view of a rolling scratching device for rolling scratches on the surface of an object to be processed.

FIG. 12 is a schematic cross-sectional view of a crack insertion device for projecting a hard ball which is one of the projectiles.

FIG. 13 is a schematic sectional view of a suction type nozzle device.

FIG. 14 is a schematic cross-sectional view of a coating heating device that is removed by heating the coating of an object to be treated.

15 is a schematic cross-sectional view of a paint removing device that constitutes the paint removing device shown in FIG.

16 is a schematic cross-sectional view of a cleaning device for an object to be processed which constitutes the paint removing device shown in FIG.

[Explanation of symbols]

C ... Exterior parts, M ... Base material, P ... Painting, D ... Dots, L ...
Linear scratches, S ... Circular cracks, G ... Projection material, 1 ... Paint removing device according to an embodiment of the present invention, 10 ... Paint scratching device, 1
0A ... Paint scratching device of the first embodiment, 110 ... Conveyor, 120 ... Load receiving plate, 130 ... Punch device,
131 ... Punch, 140 ... Control device, 10B ... Paint scratching device of the second embodiment, 160 ... Blade device, 161
... Blade, 10C ... Paint scratching device of the third embodiment,
170 ... Crack scratching device, 171 ... Fixed type, 172 ... Press type, 10D ... Paint scratching device of the fourth embodiment, 190
... Roller, 191 ... Protrusion, 192 ... Load receiving plate, 10E ... Paint scratching device of the fifth embodiment, 200 ...
Disk, 201 ... Impeller, 202 ... Blade, 20
3 ... Deflector, 10F ... Paint scratching device of sixth embodiment, 210 ... Suction nozzle device, 211 ... Nozzle body, 213 ... Nozzle tip, 10G ... Paint scratching device of seventh embodiment, 220 ... Coating heating device , 30 ... Paint stripping device, 310 ... Cabinet, 320 ... Peeling chamber, 330
... Collection receiver 370 ... Nozzle, 40 ... Cleaning device, 410
... Cabinet, 411 ... Cradle, 420 ... Washing room, 4
30 ... Nozzle, 50 ... Dust collector, 60 ... Demolition work equipment,
61 ... Disassembly work table, 62 ... Substrate collection box, 6
3 ... Keyboard collection box, 64 ... Paint peeled exterior parts collection box

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B24C 9/00 B24C 9/00 EG 11/00 11/00 BZ (72) Inventor Yoshiaki Owada Tokyo 6-35, Kita-Shinagawa, Shinagawa-ku Sony Corporation F-term (reference) 3B116 AA46 AB14 BA03 BA06 BB22 BB72 BB90 4D075 AA06 BB04Z BB20Z DA23 DB07 DB31 DC18 EA02 4F033 BA05 DA01 EA01

Claims (11)

[Claims] 1. A method of removing the coating by scratching the coating of an object to be processed, the surface of the base material being coated, and then projecting a projectile material softer than the base material at a high speed. Characteristic paint removal method. 2. The coating removing method according to claim 1, wherein the scratches are dot-like scratches. 3. The paint removing method according to claim 1, wherein the scratches are linear scratches. 4. A projection material softer than the base material is projected at a high speed after the surface of the coating is cracked by plastically deforming an object to be coated on the surface of the base material. A coating removal method, characterized in that the coating is removed thereby. 5. The method of removing paint according to claim 4, wherein the crack is formed by projecting a hard sphere having a relatively large diameter onto the surface of the object to be treated. 6. The coating material is coated on the surface of the base material to weaken or cut the coating cross-linking by heating the coating of the object to be treated, and then a projection material softer than the base material is projected at high speed. A coating removal method, characterized in that the coating is removed thereby. 7. A softer material than the base material after the coating cross-linking bond is weakened or cut by heating the coating surface while scratching the coating of the object to be treated on the surface of the base material. A method for removing paint, characterized in that the paint is removed by high-speed projection of a projection material such as plastic particles or plant particles. 8. A paint piece or a shot material adhered to the surface of the base material after the coating is removed by air blowing the surface of the base material after the coating is removed. The method for removing paint according to claim 1, wherein the crushed projection pieces are removed. 9. A coating scratching device equipped with a punch or a mold for scratching a coated surface of a workpiece whose surface is coated with a base material; A coating stripping device equipped with a nozzle for spraying or spraying a shot material onto the scratched coating surface to peel off the scratched coating, and a nozzle for spraying a cleaning material for washing the surface of the base material from which the coating has been stripped off. A paint removing device comprising: a cleaning device; and a dust collecting device that sucks and stores dust discharged from the paint removing device and the cleaning device. 10. A blast material projected or jetted by the coating stripping device, a used blast material crushed by hitting the object to be processed, and a coating material of the coating that has been stripped off are collected, and among these, The paint removing device according to claim 9, wherein relatively large particles to be supplied are supplied again to the nozzle, and fine particles are collected by the dust collecting device. 11. A dismantling work facility for disassembling a waste material coated on the surface of a base material and separating the constituent members is arranged in the vicinity of the paint scratching device. Item 9. A paint removing device according to Item 9.