A rotary atomizing coating device includes a rotary atomizing head. The rotary atomizing head includes a first bell cup, a second bell cup, and an inner member. The outer peripheral surface of the inner member is provided with paint discharge holes. The paint discharge holes communicate with a paint supply passage. The first bell cup includes a plurality of through holes. The plurality of through holes are disposed near the paint discharge holes. The plurality of through holes communicate with the second bell cup.

A rotary atomizing coating device includes a rotary atomizing head. The rotary atomizing head includes a first bell cup, a second bell cup, and an inner member. The outer peripheral surface of the inner member is provided with paint discharge holes. The paint discharge holes communicate with a paint supply passage. The first bell cup includes a plurality of through holes. The plurality of through holes are disposed near the paint discharge holes. The plurality of through holes communicate with the second bell cup.

The angle adapter according to the invention for a powder spray device comprises an upstream housing, which has an upstream powder channel, a connection to the powder spray device, and a longitudinal axis, about which the housing can be rotated. The powder spray device additionally comprises a pivot body comprising a downstream powder channel, which connects to the upstream powder channel The pivot body can be pivoted about a pivot axis, whereby the pivot axis runs obliquely to the longitudinal axis. A nozzle is additionally provided, which connects to the pivot body. Several webs and grooves are provided at the housing and pivot body, whereby the webs protrude into the grooves, and the webs and grooves are formed so that they form a labyrinth. A high voltage line is furthermore provided, which extends from the upstream housing via the pivot body all the way into the nozzle and which is formed there as high voltage electrode.

The present invention relates to a portable spay device and, more specifically, to a portable spray device moving a cartridge member by means of a simple rotational motion of a spray rotating body, thereby enabling powder positioned inside the cartridge member to be effectively sprayed to the outside.

An electrostatic atomizing coating apparatus and method incorporate a rotary head having a base portion, an open end and a plurality of grooves formed radially on an inner peripheral surface of the open end, an inside diameter of the rotary head increasing from the base portion toward the open end, and a motor configured to rotate the rotary head to discharge a thread-shaped paint. A voltage is applied to the rotary head so as to form an electrostatic field between the open end of the rotary head and an earthed coating target and to electrostatically atomize the thread-shaped paint discharged from the open end. Voltage output from the generator is controlled so as to adjust an intensity of the electrostatic field and to control a particle diameter of the electrostatically atomized thread-shaped paint.

A bell cup (3) of a rotary atomization-type coating device (1) is provided. This device has a rotary shaft (13) and a feed tube (15) inserted in the rotary shaft. The bell cup is fitted to a tip end part of the rotary shaft and has a coating material spreading surface (31) on an inner surface of the bell cup. The feed tube discharges a coating material to the coating material spreading surface. The coating material spreading surface includes a region extending from a predetermined position on a proximal end side to a distal end edge. The region is constituted of a convex curved surface toward an extension of the rotary shaft. The outermost surface of at least part (31B) of the coating material spreading surface is covered by a diamond-like carbon film (50) free from silicon at least on its outermost surface.

An electrostatic atomizing coating apparatus and method incorporate a rotary head having a base portion, an open end and a plurality of grooves formed radially on an inner peripheral surface of the open end, an inside diameter of the rotary head increasing from the base portion toward the open end, and a motor configured to rotate the rotary head to discharge a thread-shaped paint. A voltage is applied to the rotary head so as to form an electrostatic field between the open end of the rotary head and an earthed coating target and to electrostatically atomize the thread-shaped paint discharged from the open end. Voltage output from the generator is controlled so as to adjust an intensity of the electrostatic field and to control a particle diameter of the electrostatically atomized thread-shaped paint.

A bell cup (3) of a rotary atomization-type coating device (1) is provided. This device has a rotary shaft (13) and a feed tube (15) inserted in the rotary shaft. The bell cup is fitted to a tip end part of the rotary shaft and has a coating material spreading surface (31) on an inner surface of the bell cup. The feed tube discharges a coating material to the coating material spreading surface. The coating material spreading surface includes a region extending from a predetermined position on a proximal end side to a distal end edge. The region is constituted of a convex curved surface toward an extension of the rotary shaft. The outermost surface of at least part (31B) of the coating material spreading surface is covered by a diamond-like carbon film (50) free from silicon at least on its outermost surface.

PROBLEM TO BE SOLVED: To evolve a spark discharge preventing effect of an electrostatic coating device. SOLUTION: One coating robot has an arm equipped with a plurality of electrostatic coating devices 100 close to each other and the plurality of the electrostatic coating devices 100 is connected in parallel with each other to one high-voltage generator 102. A hollow rotary shaft 108 driven by an air motor 104 is disposed with nine plate-shaped resistors 120 arranged circumferentially at intervals. The nine plate-shaped resistors 120 are connected in series and a high voltage is applied via the resistors 120 to a rotary atomization head 110. The rotary atomization head 110 is made of a semiconductive resin.

The present invention relates to a portable spay device and, more specifically, to a portable spray device moving a cartridge member by means of a simple rotational motion of a spray rotating body, thereby enabling powder positioned inside the cartridge member to be effectively sprayed to the outside.