Coating apparatus – With means to apply electrical and/or radiant energy to work... – Electrostatic and/or electromagnetic attraction or...
Patent
1984-08-28
1986-01-14
Bueker, Richard
Coating apparatus
With means to apply electrical and/or radiant energy to work...
Electrostatic and/or electromagnetic attraction or...
118634, 118635, 118638, B05D 104
Patent
active
045639779
ABSTRACT:
Inside the enclosing wall (1) of the electrostatic coating plant for applying dry or wet color coatings to electrically conductive surfaces of articles (2) set up in an insulated position is located an electrostatically chargeable curtain (9), the charge polarity of which is the same as that of the spraying gun (7) used for the coating operation. The article (2) set up in an insulated position is supplied with opposite polarity, which is necessary for the electrostatic coating, by an inductor arrangement (16) arranged above the article (2), the inductor arrangement (16) applying an electrostatic field produced by means of a peak inductor (19) to an electrically conducting layer (18), which is located on the rear of a casing piece (17) made of insulating material. The charge field radiated from the surface of the casing piece (17) brings the article (2) to be coated, suspended beneath the casing piece (17), to a potential at which the material particles located in the spraying jet (8) of the spraying gun ( 7) strike both the front and rear surface sections with approximately uniform distribution.
The achieved electrostatic guidance of the coating material particles enables both an optimum utilization of the coating material and a speeded-up operating function of the coating plant.
REFERENCES:
patent: 2428991 (1947-10-01), Ransburg
patent: 2729191 (1956-01-01), Ransburg
patent: 2730988 (1956-01-01), Starkey
patent: 3976031 (1976-08-01), Itoh
patent: 4230068 (1980-10-01), Itoh et al.
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