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Recycling method for recovering metal type powder coating

A technology of powder coating and metal molding, applied in the direction of powder coating, etc., can solve the problems that the recycled powder cannot be reused, destroys the composition ratio of the powder, and has a complex structure, so as to achieve great social and economic benefits, solve processing problems, and avoid pollution environmental effects

Inactive Publication Date: 2009-12-23
ZHEJIANG WANFENG MOTORCYCLE WHEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal-type powder coating is a special powder coating. The biggest feature is that metal particles are used as pigments, and pigments are one of the important factors affecting surface smoothness. Resin, curing agent, etc. are film-forming substances, which are mixed by mechanical stirring. The delivery of the content of each component will have a great impact on the color, leveling, shrinkage and solubility of the coating film. In the electrostatic spraying operation, due to the excellent conductivity of the metal pigment, the coating is in the spray gun pole The needles keep accumulating and fall off automatically to a certain extent, and because the specific gravity of the metal powder in the metal-type powder coating is relatively high, the uniformity of the particles is poor. Floating out of the coated workpiece, in addition, the metal pigment has poor dispersion and is easy to form small powder clusters
In this way, the content of each component in the recycled powder has changed. There is more aluminum powder and less resin curing agent, which destroys the composition ratio of the original powder and seriously affects the performance of the powder, especially the color and leveling.
This type of powder cannot be used like other types such as epoxy powder. After recycling, it can be mixed with new powder for secondary use. Theoretically, the recycled powder can no longer be reused. The recovered metal powder can only be discarded and wasted. In practice During use, the discarded ratio reaches more than 30%, and if the structure of the sprayed part is complex, it is as high as more than 50%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 33.3Kg of base powder to the batching tank (the content of each component: 21.65Kg of pure polyester; 4.66Kg of barium sulfate solid; 4.66Kg of titanium dioxide; 1.50Kg of curing agent; 0.4Kg of pigment; 0.26Kg of leveling agent; 701 doses 0.07Kg; Benzoin 0.1Kg), and then take an appropriate amount of metal-type powder coating recycled powder, after sieving, take 66.7Kg recycled powder and add it to the batching tank, stir evenly with a high-speed machine, and the time does not exceed 30 seconds to obtain new powder.

Embodiment 2

[0015] Add base powder 28.5Kg (wherein the content of each component: pure polyester 18.53Kg; barium sulfate solid 3.99Kg; titanium self-powder 3.99Kg; curing agent 1.28Kg; pigment 0.34Kg; leveling agent 0.22Kg; 701 Benzoin 0.06Kg; Benzoin 0.09Kg), and then take an appropriate amount of metal-type powder coating recycled powder, after sieving, take 71.5Kg recycled powder and add it to the batching tank, stir evenly with a high-speed machine, and the new powder will be obtained within 30 seconds .

Embodiment 3

[0017] Add 25.0Kg of base powder to the batching tank (the content of each component: pure polyester 16.25Kg; barium sulfate solid 3.50Kg; titanium dioxide 3.50Kg; curing agent 1.13Kg; pigment 0.3Kg; leveling agent 0.2Kg; 701 doses 0.05Kg; Benzoin 0.07Kg), and then take an appropriate amount of recycled metal-type powder coating powder, after sieving, take 75.0Kg of recycled powder and add it to the batching tank, and stir evenly with a high-speed machine for no more than 30 seconds to obtain new powder.

[0018] In the method of the invention, the metal powder utilization rate reaches over 95%.

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PUM

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Abstract

The invention provides a recovery and reuse method of metal powder paint. The method is to mix the metal powder paint recycled powder after sieving with the prepared base powder according to a certain proportion, and stir the mixture at a high speed evenly to obtain the metal powder paint. Powder coating fresh powder. The method has the advantages of simple process, easy operation and low cost, and the recovered metal type powder can be recycled, while the performance, color and workability are the same as those of the original powder, thereby achieving effective recycling, protecting the environment and saving resources.

Description

technical field [0001] The invention relates to a recovery and reuse method of metal powder paint. technical background [0002] In industrial production, most industrial products such as home appliances, automobiles, motorcycles, toys, etc. need to be sprayed on the surface for protection and decoration. Metal-type powder coating is a special powder coating. The biggest feature is that metal particles are used as pigments, and pigments are one of the important factors affecting surface smoothness. Resin, curing agent, etc. are film-forming substances, which are mixed by mechanical stirring. The delivery of the content of each component will have a great impact on the color, leveling, shrinkage and solubility of the coating film. In the electrostatic spraying operation, due to the excellent conductivity of the metal pigment, the coating is in the spray gun pole The needles keep accumulating and fall off automatically to a certain extent, and because the specific gravity of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/03
Inventor 王小杰吕旭春
Owner ZHEJIANG WANFENG MOTORCYCLE WHEEL
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