KR100202166B1 - Paint coated on plastic removing apparatus - Google Patents

Abstract

The present invention relates to a device for collecting and pulverizing a product coated with paint on a high quality resin surface such as a bumper for automobiles, and then completely removing and removing the coated paint on the surface.

That is, the resin product, the caustic soda and MC mixed in the rotary cylinder 4, mixed with the mixed solution, that is, the chemicals are added together and sufficiently stirred so that the paint is peeled off from the resin product, and the product is again dehydrator 10 and the centrifuge. The paint peeled from the product is completely separated and removed by the process through 24, and the product is recycled by extruding and recycling the recycled chip through the conventional extruder 32 again.

Description

Peeling device for paint attached to the surface of resin products

The present invention is mainly to collect and crush the resin product coated with a paint layer on the surface, such as a bumper for automobiles, and then to separate and remove the paint layer coated on the surface to collect and recycle only good quality resin.

In general, products such as bumpers for automobiles are injection molded using high quality resins in terms of their functions. However, these products are not recycled due to the inability to peel off the paint layer coated on the surface of the product, and are incinerated or some small amount is recycled by crushing the paint without peeling and then mixing it with an ordinary resin at an appropriate ratio. .

However, the bumpers collected from the scrapped cars or the bumpers collected due to replacement in the event of accidents are not recycled, thus increasing the environmental pollution.

In order to solve these problems, a coating film removal method such as Japanese Patent Laid-Open No. 5-185024 has been provided.

That is, a small amount of methanol and sodium hydroxide are added to the container, followed by heating and stirring, and the coating film formed on the product is removed by inputting and treating the product having the coating film formed therein.

However, in the above method, since the mixed solution of methanol and sodium hydroxide in the container needs to be heated, not only does it cause energy waste due to heating, but the heating means is not directly heating the container, but indirectly heating, that is, heating the container filled with the heating solution. Since the solution filled in the heating vessel is heated and the heating solution is configured to heat the methanol and sodium hydroxide solution filled in the vessel, the heating means is not only cumbersome, but also a means for stirring the product after putting the product to be processed in the vessel and stirring it. Although it is used, this is because the product is not evenly stirred, so that effective stripping is not achieved, and the treatment capacity is also small, so that the efficient stripping operation could not be expected.

The present invention has been made to correct these problems.

That is, the discarded bumper is collected and then pulverized, and the pulverized product is first put into a centrifuge with an appropriate amount of medicine and then treated to peel off the paint coated on the surface.

As the paint separated from the crushed product is moved along the transfer screw, the peeled paint or the medicine is separated first and the separated product is put into the centrifugal dehydrator and dried again. The separated and separated product is collected in a sump.

The product collected in the sump is transferred to the centrifuge again by second drying with a hot air dryer, the product transferred to the centrifuge is completely dried, the paint is completely separated from the product, only pure resin remains, and the resin is again By conveying along the feed screw is fed to the extruder to be extruded, it is possible to recycle high-quality resin used in bumpers and the like.

Ideally, the agent used in the treatment process is a mixture of caustic soda (NaOH) and methylene chloride (CH ₂ Cl), and the mixing ratio of caustic soda and methylene chloride is about 1: 9. This is ideal.

1 is a schematic configuration diagram of the process of the present invention, and a state diagram of a rotating cylinder and a dehydrator portion.

2 is a schematic diagram of a process of the present invention showing a state of the centrifuge and the extruder.

* Explanation of symbols for main parts of the drawings

2: frame 4: rotating cylinder

6: transfer screw 8: transfer pipe

10: dehydrator 12: hopper

14: rotating body 16: outlet

18: catch 20: pen

22: transfer pipe 24: centrifuge

26: transfer pipe 28: supply pipe

30: transfer screw 32: extruder

34: Hopper

Hereinafter, an embodiment of the present invention will be described in detail by process according to the accompanying drawings.

Step 1: Paint Peeling Process

를 함께 투입한 다음 충분히 교반하여 제품에 코팅된 페인트를 제품으로부터 박리시킨다.About 500kg and chemicals 40 of which product is installed by rotating the rotating cylinder 4 on the frame 2 so as to be rotated by the driving motor M, and then crushing the bumpers collected in the rotating cylinder 4.

Are added together and then stirred sufficiently to release the paint coated on the product from the product.

At this time, the stirring time of the product should be about 30 to 60 minutes, and the injected chemicals are ideally added with caustic soda and M.C (methylene chloride) in a ratio of about 1: 9.

When the peeling of the paint layer is completed from the crushed product as described above, the product is transferred to the centrifugal dehydrator through a transfer pipe 8 provided with a transfer screw 6.

At this time, the transfer pipe 8 is composed of a mesh so that the paint and the chemicals attached to the product during the transfer of the product falls down some.

Second Process: Dewatering Process

This process is a dehydration process that removes water, paint, etc. attached to the product and is made as follows.

That is, the product in which the product and the paint are separated through the first process is transferred through the transfer screw 6, and the transferred product is supplied to the dehydrator 10 through the hopper 12, and the product supplied to the dehydrator 10 is The paint attached to the product is separated by dehydration by the rotating body 14 rotated by the motor M, and the product, which is separated from the drying and the paint, is discharged to the outside through the outlet 16 configured at one side of the dehydrator 10. The discharged and discharged product is collected in the sump 18.

As described above, the product collected in the sump (18) is again transferred to the centrifuge (24) while further drying is carried out through the transfer pipe (22) by the suction force of the pen (20).

Third process: drying process

This process is to dry the product dehydrated in the second process once more to complete the drying.

That is, when the product is transferred to the centrifuge 24 through the transfer pipe 22 by the suction force of the fan 20, the water is dehydrated and dried once more using the centrifuge 24 rotated by the motor M2. After a minute of treatment, the water and paint attached to the product are almost separated and only the pure product (PP resin) remains.

As described above, the peeled paint attached to the product or the product of which water is almost removed is supplied to the conveying tube 26 through the supply tube 28 connected to the conveying tube 26 at the bottom of the centrifuge 24, and the conveying tube The product supplied to (26) is fed back through the feed screw 30 rotated by the motor (M3) and at the same time separate the unseparated paint and the like once more hopper 34 of the conventional extruder (32) It is supplied as a recycled chip for production reuse.

The present invention constructed as described above collects waste bumpers, which are disposed of, and pulverizes them to a certain size, and then puts the crushed product together with the chemicals in the rotating cylinder 4 and peels paint attached to the pulverized product by stirring for a predetermined time. After drying, the dried product is sequentially processed again through the dehydrator 10 and the centrifuge 24 through the transfer screw 6 and the transfer pipe 22 to completely remove and remove the paint attached to the product. It is possible to reuse pure high quality resin.

In this process, the third process can be treated once more as needed, in which case more complete separation of the paint is possible.

Therefore, the present invention collects the bumper formed of high-quality resin without disposal and then pulverizes to remove the coated paint on the surface of the bumper so that only pure resin can be recycled, thereby reducing environmental pollution and providing high-quality resin at low cost. You will be able to receive such effects.

Claims (1)

About 40 kg of the resin product pulverized in the rotary cylinder 4, about 40 mixed solution of caustic soda and MC (methylene chloride) in a ratio of 1: 9

After the injection, the coated paint was peeled off by stirring for about 30 to 60 minutes, and the peeled paint was supplied to the dehydrator 10 through the transfer pipe 8 to primaryly separate the chemical and the peeled paint. The first separated product is again supplied to the centrifuge (24), dried to remove the remaining paint, and the product is supplied to the conventional extruder (32) through the transfer pipe (26) to recycle the regenerated chip. A peeling device for paint attached to a surface of a resin product, characterized in that it is produced and recycled.

Images