KR100406195B1 - Reprocessing method and device of powder coatings - Google Patents

Abstract

The present invention relates to a powder coating reprocessing method and apparatus for collecting by-products generated in the manufacturing process of powder coating to remove impurities and reuse them.

The reprocessing method of the powder coating of the present invention comprises the steps of separating the foreign matter of the waste powder paint generated and stored during the manufacturing process of the powder coating, and transferring the foreign matter from the waste powder paint to a storage cycle, and Take out to the lower part of the storage cycle, characterized in that it comprises the step of mixing as heated asphalt and aggregate with a certain ratio to use as asphalt.

Further, the powder coating reprocessing apparatus includes a hopper capable of injecting stored powder powder, a screen provided in a mesh shape on the hopper, and a powder coating poured on the screen by vibrating under the hopper. A vibrator in which particles of the particle fall down, a transfer screw installed to transfer the fine particles of the powder coating dropped to the bottom of the hopper, a bucket elevator for elevating the powder coating transferred by the transfer screw, and the bucket elevator Characterized in that the dust collector including a dust collector, such as fine particles contained in the powder coating to be supplied comprises a storage cycle installed on the top.

Description

Reprocessing method and device of powder coatings

The present invention relates to a powder coating reprocessing method and apparatus for collecting by-products generated in the manufacturing process of powder coating to remove impurities and reuse them.

Generally, the powder coating composition is composed of a resin, a solvent, a pigment, and an additive, and the powder coating is a powder obtained by uniformly melting and dispersing a resin, a pigment, and an additive, which is a 100% solids containing no solvent. As a powder coating, it is not coated by a general method (brush, roller, general spray, etc.), but an electrostatic powder coating or a fluid immersion coating is formed to form a coating film.

Advantages of such powder coatings are high economical efficiency, recovery powder coatings can be used, waste disposal costs are reduced because there is no waste, and adhesiveness is easy to clean.

In addition, there is no risk of poisoning, fire or explosion by solvents, and there is little environmental pollution such as air pollution or water pollution.With the convenience of painting technology, a thick coating film can be obtained by one coating. Is improved.

Disadvantages are the need for special coating equipment for powder coating, difficult to change color in the work line, difficult for thin film coating (less than 40㎛), high curing temperature, smoothness of paint and precision of color coating are inferior to liquid powder coating.

As shown in FIG. 3, a general powder coating process includes a feeding step (S1) for supplying a resin, a pigment, and a wheeler, a mixing step (S2) for mixing the same, and a melt extrusion step (S3) for heating after mixing; Cooling step (S4) for cooling the melt-extruded powder coating, grinding step (S5) to make a fine powder after the cooling step (S4), and the coarse particles of the powder coating through this grinding step (S5) It consists of a separation step of filtering (S6), and a packaging step (S7) of packaging the powder coating through the separation step (S6).

In this way, when the manufacturing process of the powder coating is completed to the packaging is a cleaning step (S8) of course.

The powder coating, which is scattered during the process of manufacturing the powder coating as described above, is collected by a dust collector or the waste powder coating generated by cleaning the residue is collected on the bag.

At this time, when the total weight of the powder coating powder is 100, 30% is generated in the melt extrusion step (S3), 10% is generated in the cooling step (S4), 15% in the grinding step (S5), the 30% in the separation step (S6), 5% occurs in the packaging step (S7), and finally 10% occurs in the cleaning step (S8).

The collected waste powder paint can be used to make a liquid in the case of white color and combine it with other colors, but the dark or turbid color can be buried in a designated place because it does not have the original color.

The amount of landfill is about 3,000 tons per year nationwide, and the figure is increasing by 11.2% per year, and its use is increasing exponentially because it recommends the use of powder coating without harmful substances.

However, because the powder coating is not decomposed in the soil, it has to be buried in a designated landfill place, there is a problem that the landfill site is insufficient.

The present invention has been made in view of the conventional problems as described above, by collecting the waste powder paint generated during the manufacturing process of the powder coating to remove impurities, so that it can be mixed with the asphalt used in the manufacture of ascone in a certain ratio. To solve the conventional problems, as well as to provide a method and apparatus for reprocessing powder coating to improve the quality of asphalt products.

1 is a schematic view showing an apparatus for removing and storing impurities to reuse by-products generated during the manufacturing process of powder coating according to the present invention,

2 is a process chart showing a reprocessing process of waste powder coating according to an embodiment of the present invention;

3 is a process chart showing a manufacturing process of a general powder coating.

<Explanation of symbols for the main parts of the drawings>

W: waste powder coating

11: hopper

14: vibrator

15: Feeding screw

16: Bucket Elevator

17: dust collector

18: storage

Reprocessing method of the powder coating of the present invention for achieving the above object, the step of separating the foreign matter of the waste powder paint generated and stored during the manufacturing process of the powder coating, when the foreign matter is separated from the waste powder coating Transferring to the furnace, and the step of taking out to the lower portion of the storage cycle and mixed with heated asphalt and aggregate at a certain ratio, characterized in that it comprises a step of using as asphalt.

In addition, the powder coating reprocessing apparatus includes a hopper which is capable of injecting stored powder powder, a screen installed in a net shape so that only fine particles pass on the hopper, and installed at a lower portion of the hopper to vibrate the Lifting the vibrator so that the fine particles of the powder coating poured on the screen fall down, the transfer screw installed to transfer the fine particles of the powder coating dropped to the lower side of the hopper to one side, and the powder coating conveyed by the transfer screw It is characterized in that it comprises a bucket elevator and a dust collector installed at the top of the dust collector for collecting the particles such as fine particles contained in the powder coating supplied to the bucket elevator.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing an apparatus for removing and storing impurities for reuse of by-products generated during the manufacturing process of powder coating according to the present invention, Figure 2 is a reprocessing process of waste powder coating according to an embodiment of the present invention As a process drawing which is shown, the same code | symbol is attached | subjected to the same site | part as FIG. 3 explaining a prior art, and the description is abbreviate | omitted.

Mixed item ratio Waste Powder Coating 0.3 to 1.0 wt% asphalt 3.5 to 6.5 wt% aggregate 92.5 ~ 96.2 wt% Herein, the step (S11) of separating the foreign matter will be described in more detail. After pouring the waste powder paint (W) onto the screen 12 installed on the hopper 11, the worker (around the hopper 11 ( At the same time, the 13 observes the impurities on the screen 12 and removes them to the outside (the process of removing impurities), and at the same time, small particles are caused by the vibration of the vibrator 14 installed at the lower portion of the hopper 11. It is supposed to move to the lower part of.

And the step (S12) for transferring the waste powder coating (W) to the storage path 18, while transferring the waste powder coating (W) moved to the lower portion of the hopper 11 to the transfer screw (15) The powder coating material supplied to the upper part of the storage path 18 by the elevator 16 and supplied to the upper part of the storage path 18 by the dust collector 17 installed on the upper part of the storage path 18. While filtering again, it is stored in the storage path 18.

In addition, as shown in Table 1, mixing with asphalt and aggregate at a predetermined ratio and using as asphalt (S13), with a powder coating taken out of a predetermined amount in the storage cycle 18, and 160 ~ 180 ℃ Ascon is produced by stirring and mixing together the aggregate separated by size in a heated and stored hot bin and asphalt heated to 140 to 160 ° C. Meanwhile, the powder coating reprocessing apparatus is capable of injecting the stored waste powder coating (W). The hopper 11, the screen 12 installed in a mesh shape so that only fine particles pass on the hopper 11, and the screen 12 installed under the hopper 11 by vibration. It includes a vibrator (14) so that the fine particles of the powder coating poured in the lower portion.

In addition, the transfer screw 15 is installed to transfer the fine particles of the powder coating dropped to the lower side of the hopper 11, the bucket elevator 16 for elevating the powder coating transferred by the transfer screw 15, and The dust collector 17 which collects the fine particles etc. contained in the powder coating material supplied to this bucket elevator 16 includes the storage path 18 provided in the upper part.

Here, when the asphalt and the powder powder are mixed in a weight ratio of 90:10 to 70:30, the load is applied to the test specimens of density (kg / cm 3) and Marshall test specimens, as shown in Table 2, compared to using only asphalt. Stability (kg), which is the load at the time of destruction of the specimen, the porosity (%) of the volume of the pore of the compacted bitumen mixture, %), And the performance of the flow is improved.

Asphalt and waste powder coating weight ratio (%) Density (kg / cm 3) Porosity (%) Saturation (%) Stability (kg) Frow 0 2.336 4.11 76.3 921 32 5 2.334 4.56 74.44 916 31 10 2.338 4.41 75.0 2110 34 15 2.342 4.22 75.9 1543 37 20 2.350 4.30 77.3 1395 32 25 2.339 4.35 75.3 1118 25 30 2.331 4.69 73.8 925 20 35 2.324 4.98 72.5 839 16 40 2.318 5.23 71.5 764 13

At this time, the mixing ratio of the asphalt powder and the waste powder is 85:15 in weight ratio, that is, when mixed at 15%, the performance is the best state.

The main reason for improved quality of Ascon is that 60% of the resin (epoxy resin, polyester resin) contained in the waste powder paint is contained. The thermosetting material is maintained while maintaining the plastic deformation and stability is increased.

As described above, the waste powder paint generated during the powder coating process is collected to remove impurities, and then mixed with the asphalt used in the manufacture of ascone at a predetermined ratio, thereby allowing the waste powder paint to be disposed at a designated landfill site. There is an effect that can solve the conventional problems to be buried.

Ascon product quality has the effect of improving density, stability, porosity, saturation, and flow.

Claims (5)

Separating foreign substances generated and stored in the powder coating during the manufacturing process of the powder coating; When the foreign matter is separated from the waste powder paint is transferred to the storage cycle, 0.3 to 1.0 wt% of the waste powder paint from which the foreign matter is separated, 3.5 to 6.5 wt% of the heated asphalt taken out to the lower part of the storage cycle, Aggregate 92.5 ~ 96.2 wt% of the powder coating reprocessing method comprising the step of using as an asphalt mixture. The method of claim 1, Separating the foreign substance is a process of pouring waste powder paint on the screen installed on the hopper to remove impurities, and the process of moving small particles to the bottom of the hopper through the screen by the vibration of the vibrator installed on the bottom of the hopper And transferring the waste powder paint moved to the lower portion of the hopper to a storage cycle through a transfer screw and a bucket elevator, and filtering dust of the powder paint supplied to the upper portion of the storage cycle by a dust collector. Reprocessing powder coating comprising a. The method according to claim 1 or 2, The asphalt and waste powder coating is a weight ratio of 90:10 to 70:30 by mixing the powder coating, characterized in that used for use. delete A hopper for storing stored powder powder, a screen installed in a mesh shape so that only fine particles pass on the hopper, and fine particles of powder coating poured on the screen by vibrating under the hopper. A vibrator in which the lower portion falls down, a transfer screw installed to transfer the fine particles of the powder coating dropped to the lower portion of the hopper to one side, a bucket elevator for elevating the powder coating transferred by the transfer screw, and the bucket elevator. Reprocessing device for powder coating comprising a storage cyclone installed on top of the dust collector for collecting dust such as fine particles contained in the powder coating supplied.