公开(公告)号：JPH02237667A

公开(公告)日：1990-09-20

申请号：JP1047890

申请日：1990-01-19

Applicant: NORDSON CORP

Inventor： ROBAATO ERU UOOKAA ,  DONARUDO II SHIYASUTAA ,  JIYON SHIYAAPURESU ,  ARAN JIEE NOBE ,  JIEEMUZU SHII MAAFUI

IPC: B05B5/04 ,  B05B5/053 ,  B05B5/06 ,  B05B7/08

Abstract: PURPOSE: To provide an electrostatic spraying apparatus which is safe and is high in coating material transfer efficiency by reducing the amt. of a conductive material used for a rotary atomizer as far as possible. CONSTITUTION: The liquid coating material in an annular cavity 34 is admitted through a coating material passage 36 into a forward cup cavity 38 by rotation of a cup 20 and is moved toward a front atomizing edge 42 along an inside cup wall 40. The coating material is then atomized by centrifugal force to form an atomizing spray pattern 29. The liquid coating material is electrified by coming into contact with an electrifying electrode 46 at the time of moving from the passage 36 to the front atomizing edge 42 of the cup. The forward projecting ends of conductors 214, 218b and 220b part extremely slightly from the outside surface of a semiconductor ring 102 and when high voltage is transmitted from an insulation cable 74 to the conductors 214, 218b and 220b, the electrostatic energy is transmitted beyond this spacing to the semiconductor ring 102 and is transferred to the ring electrode 46 via a pin 104, by which the liquid coating material is contactually electrified.

公开(公告)号：JPH02233160A

公开(公告)日：1990-09-14

申请号：JP2859790

申请日：1990-02-09

Applicant: NORDSON CORP

Inventor： ARAN JIEE NOBE ,  JIYOSEFU ACHIRU ERII PINTERON ,  DANIERU PINORUTO

IPC: B05B5/025 ,  B05B5/12 ,  B05B15/04 ,  B05C7/02 ,  B05C19/06 ,  B05D1/06 ,  B05D7/22

Abstract: PURPOSE: To uniformly coat the interior surfaces of hollow tubular articles with a powder coating material by releasing a pneumatic transporting powder stream impressed with an electrostatic charge into the open end of the hollow tubular articles via a nozzle, applying the powder coating material to the interior surface thereof and sucking and collecting the excess powder with a collection shroud. CONSTITUTION: The nozzle assembly 1 moves back and forth in a rotating grounded vessel body 3 and adheres and applies the pneumatic transporting powder to the interior surface while releasing the pneumatic transporting powder previously impressed with the electrostatic charge as jet stream 14 from the two release orifices 9. The other open end 5b of the vessel body 3 is enclosed by the collection shroud 6 which sucks and removes the excess powder not adhered on the interior surface of the can body 3 by a pipe 17 connected to a vacuum source. The powder is then guided into a powder recycling unit to be recycled. The entire part of the interior surface of the article is thus uniformly coated and protected with the min. amt. of the powder.

公开(公告)号：JPH06206018A

公开(公告)日：1994-07-26

申请号：JP24839693

申请日：1993-10-05

Applicant: NORDSON CORP

Inventor： KAATEISU BII HARAA ,  ARAN JIEE NOBE ,  GERARUDO DABURIYU KURAMU

IPC: B05B5/043 ,  B05B5/03 ,  B05B5/047

Abstract: PURPOSE: To obtain a tribo-electric powder spray gun for tribo-electrically charging powder by providing the spray gun with a charging block for frictionally charging the powder while the powder passes through an annular spacing and a sprayhead of a charging block outlet for dosing the charged powder. CONSTITUTION: The outside diameter of an inner wear sleeve 38 increases overall in the same position as the position in a longitudinal direction where the bore of an outer wear sleeve 40 decreases and the outside diameter of the inner wear sleeve 38 decreases overall in the same position as the position in the longitudinal direction where the bore of an outer wear sleeve 40 increases and, therefore, a narrow flow passages of a wave shape is formed for the powder by the annular spacing 46 between the sleeves 38 and 40. While the powder mixed with the diffuser air coming from a diffuser nozzle 28 flows through the annular spacing 46, the powder comes into contact repetitively with the inner and outer wear sleeve 38 and 40, by which the powder is frictionally charged by the charging portion 26 and the charged powder is dosed to the sprayhead 17 existing in the outlet of the charging portion 26.