Coating processes – Interior of hollow article coating – Rotating the article
Patent
1982-10-22
1984-06-19
Hoffman, James R.
Coating processes
Interior of hollow article coating
Rotating the article
427239, B05D 722
Patent
active
044553293
ABSTRACT:
A method for coating metal pipe with a thixotropic coating having a wet film thickness between 30 to 120 mils. The coating is a coal tar epoxy made up of a two component resin and pigment blend with the pigment comprising two sizes of glass beads. The coating material is applied via a slinger rotated within the bore of a pipe while it is moved slowly end to end past the slinger. The coating material is discharged from the slinger in a 360.degree. radial pattern in a plane substantially perpendicular to the axis of the pipe and direction of movement so as to cause a build up of a ring of the material of uniform thickness and thereby form incrementally, but continuously, due to continuous movement of the pipe, a coating of uniform thickness. The pipe is thereafter rotated while the coating is wet to develop a centrifugal force in the range of 50 g to 100 g. The pipe may also be vibrated while being rotated to enhance depletion of air bubbles and spread of coating into cracks and interstices in the internal surface of the pipe and form a smooth lining.
REFERENCES:
patent: 3253075 (1966-05-01), McLaughlin et al.
patent: 4390568 (1983-06-01), Schwenk et al.
"Mainstay Composite Concrete Pipe", Mainstay Corporation, Oct. 1969.
American Cast Iron Pipe Company
Hoffman James R.
LandOfFree
Method for coating the interior surface of metal pipes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for coating the interior surface of metal pipes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for coating the interior surface of metal pipes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-413912