Method of coating small workpieces with plastic material

Details Method of coating small workpieces with plastic material Method of coating small workpieces with plastic material

1973-07-23

1976-12-28

Husack, Ralph

Coating processes

Solid particles or fibers applied

Nonuniform speed or nonrectilinear base motion

427185, 427195, 427242, B05D 312, B05D 124

Patent

active

040003388

ABSTRACT:
Small workpieces to be coated with plastic material are preheated and dropped onto a fluidized bed of plastic powder subjected to compound vibratory motion which causes the powder and the workpieces to move along a helical ramp onto a screen overlying the point of entry, with some of the particles fusing onto the workpiece surfaces to form a film. The remainder of the powder, on reaching the screen, drops back onto the bed as the coated workpieces move on to a receptacle. Fresh workpieces are deposited on the bed through one or more chutes traversing the screen; to prevent the rise of any particles through the chutes, a downward airflow is created therein.

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