Abstract: An object of the present invention is to provide a cartridge-type coating machine having a coating device for spraying paint, to which a simple, light and inexpensive cartridge for storing paint therein and for supplying the paint to the coating device is detachably attached. In a coating machine 11, a coating device having a rotary atomizing head 14 and the like is disposed at a front part of a housing 12, and a cartridge 21, in which paint is stored, is detachably attached to a rear part of the housing 12. Paint in the cartridge 21 is supplied to the rotary atomizing head 14 by pressurizing the cartridge 21 by liquid fluid, and a pressure solvent storage chamber 18b for storing the liquid fluid is formed by the housing 12 and the cartridge 21.

Abstract: A tank base (12) is formed of a mount block (13) and a feed tube (16), and a first paint passage (17) is provided internally through the feed tube (16). A baggy tank (19) is composed of a support member (20) and a bag member (21) having opposite ends thereof securely fixed to the support member (20) to define a paint chamber (22) therein. A second paint passage (23) is provided in a fore end portion (20A) of the support member (20). A tank accommodating case (25) is provided to accommodate the bag member (21). The baggy tank (19) is set in position within the tank accommodating case (25) with opposite ends of the support member (20) gripped between the mount block (13) of the tank base (12) and the tank accommodating case (25), bringing the paint chamber (22) into communication with the first paint passage (17) through the second paint passage (23).

Abstract: An atomizer, provided with an air motor and a rotary atomizing head is mounted on a front side of a housing member. An external electrode assembly, provided with support arms, electrode support members and acicular electrode members is mounted on the outer side of the housing member. A high voltage is supplied to acicular electrode members by a high voltage generator. Electrode support members are covered by a tubular cover member formed of an insulating resin film. An annular gap space is formed between the cover member and electrode support members.

Abstract: A coupling portion is provided on an outer peripheral side of a rotational shaft, a stationary ring is mounted on a fore end portion of an air motor, a rotatable ring is rotatably attached to a stationary ring, and slide plates are provided between the stationary ring and the rotatable ring movably in radially inward and outward directions of the rotational shaft. A slider shift mechanism provided on the stationary ring and the rotatable ring brings each slide plate into and out of engagement with the coupling portions in step with a rotational movement of the rotatable ring. Thus, for locking the rotational shaft in a fixed state, an operator grips and turns the rotatable ring with one hand to engage the slide plates with the coupling portions by the slider shift mechanism. In this state, a rotary atomizing head can be mounted on or dismantled from the rotational shaft.

Abstract: An atomizer including an air motor and a rotary atomizing head, mounted in a front side of a housing member, while a high voltage generator applying a high voltage to paint through the air motor is mounted in a rear side of the housing member. A cover member is fitted on the housing member to cover an outer surface of the housing member. Opposite axial ends of the cover member are fitted on and attached to opposite axial ends of the housing member so as to leave an annular gap space between the cover member and the housing member. The annular gap space keeps almost entire radially confront areas of the cover member and the housing member, preventing high voltage electrostatic charges on the outer surfaces of the cover member from leaking through the housing member.

Abstract: An atomizer (1) which is composed of an air motor (2) and a rotary atomizing head (3) is mounted in a front side of a housing member (9), outer surfaces (9A) of which are covered in a cover member (10). Further, a high voltage discharge electrode assembly (15) is provided around a front side of the housing member (9), with outer periphery of the cover member (10) circumvented by a blade ring (17) of the high voltage discharge electrode assembly (15). An edge portion (19) in the shape of a thin blade is provided at a projected rear end of the blade ring (17). Thus, electric field is concentrated at the edge portion (19) to induce a corona discharge on and around entire blade ring (17).

Abstract: A rotary atomizing-head type coating machine, wherein a paint passage for flowing a paint to a rotary atomizing-head, a turbine air passage flowing a turbine air to the turbine of an air motor, a discharge air passage for flowing the turbine air after driving the turbine to the outside in the form of a discharge air, and a heat insulating air discharge passage of a heat insulated air passage axially extending while surrounding the discharge air passage and allowing hot heat insulated air to flow therein are formed in the bottom part of a housing body forming a housing. Thus, even if the turbine air expanded in a heat insulated state and reduced in temperature flows in the discharge air passage, the housing can be prevented from being cooled by the discharge air by flowing a heat insulated air with a temperature higher than that of the discharge air in the heat insulated air discharge passage.

Abstract: A first wash fluid discharging passage (15) having an outlet end thereof opened to an outer peripheral surface (8C) is provided on a rotary atomizing head (7) and positioned behind a paint reservoir (12). On the other hand, a second wash fluid discharging passage (20) having an outlet end thereof opened to the paint reservoir (12) is also provided on the rotary atomizing head (7) positioned around a fore end of a paint tube (18). In addition, a nozzle (22) is provided at a fore outlet end of a wash fluid tube (19). The nozzle (22) internally defines an annular chamber (24) for pooling a wash fluid. The nozzle (22) is provided with first and second outlet openings (25, 26) to spurt a wash fluid toward the first and second wash fluid discharging passages (15, 20). Further, a check valve (27) is provided in the annular chamber (24) of the nozzle (22) to prevent a reverse flow of a wash fluid.

Abstract: An atomizer, provided with an air motor and a rotary atomizing head is mounted on a front side of a housing member. An external electrode assembly, provided with support arms, electrode support members and acicular electrode members is mounted on the outer side of the housing member. A high voltage is supplied to acicular electrode members by a high voltage generator. Electrode support members are covered by a tubular cover member formed of an insulating resin film. An annular gap space is formed between the cover member and electrode support members.

Abstract: A current sensor for detecting a full return current is connected to a high voltage generator. A leakage current detector including current sensors for detecting a leakage current is provided at the surface of the cover of a coating machine, air passages and a paint passage. Based on current detection values obtained by the current sensors, a high voltage control unit controls a power supply voltage control unit and a high voltage to be output from the high voltage generator can be raised or dropped. By employing the current detection values, the high voltage control unit can identify and provide notification of a location where the leakage current is increased and the insulation is deteriorated, and can request an operator to perform maintenance for the pertinent location. Further, upon occurrence of the insulation being deteriorated, the high voltage control unit can stop the high voltage supply.

Abstract: An air source (11) is connected to an air motor (3) through an electropneumatic converter (12) which is connected to a rotational controller (13). Upon changing settings in a target rotational speed (N0) or paint discharge rate (Q0), in order to supply a necessary air pressure for rotationally driving the air motor (3) in a steady state with new setting conditions, the rotation controller (13) selects a steady value (is) from a rotational data selection processing table, and outputs to the electropneumatic converter (12) the newly selected steady value (is) as an input current value (i). By so doing, the rotational speed of the air motor (3) is quickly controlled toward the changed target rotational speed (N0).

Abstract: Two sprayer units (8, 9) are arranged along a conveyer (3). A coating surface of a panel (11) conveyed by the conveyer (3) is divided into four coating areas (CAa to CAd). Then, the sprayer units (8, 9) reciprocate parallel to the conveying direction and coat the individual coating areas (CAa to CAd). At this time, at the boundaries of the coating areas (CAa to CAd), the positions of the turning paths (Ta0 to Td0) for reciprocation of the sprayer units (8, 9) are shifted from lo the front side to the rear side in the conveying direction and step-like coating trajectories (Ta to Td) are formed. As a result, the size of the area coated by each of the sprayer units (8, 9) can be expanded.

Abstract: A panel (9) is conveyed by using a conveyer (3), and the coating surface of the panel (9) is divided into two coating areas (CAa, CAb). Further, the coating areas (CAa, CAb) are coated by reciprocating sprayer units (6, 7) parallel to a conveying direction. At this time, at a boundary between the coating areas (CAa, CAb), the positions of turning paths (Ta0, Tb0) of the reciprocation of a coating machine are shifted sequentially from the front side to the rear side in the conveying direction, so that coating trajectories (Ta, Tb) like a series of steps are formed. Thus, at the boundary between the coating areas (CAa, CAb), the turning paths (Ta0, Tb0) can be spread and located, and the occurrence of color shading can be prevented.

Abstract: Segmental outward projections (12) are provided at radially opposite positions on the circumference of a tubular mount portion (7) of a main body (5), and truncated side portions (13) are provided between and at the opposite sides of the segmental outward projection (12). On the other hand, D-Shaped inward projections (14) are projected radially inward from a boundary portion between fore and rear inner peripheral surface portions (10B) and (10C) of a shaping air ring (10) in such a way as to define an outward projection passageway (15) conforming in shape with the segmental outward projections (12). At the time of mounting the rotary atomizing head (4) on the rotational shaft (3), the outward projections (12) are put in a conforming angular position relative to the outward projection passageway (15) to pass the inward projections (14).

Abstract: Segmental outward projections (12) are provided at radially opposite positions on the circumference of a tubular mount portion (7) of a main body (5), and truncated side portions (13) are provided between and at the opposite sides of the segmental outward projection (12). On the other hand, D-Shaped inward projections (14) are projected radially inward from a boundary portion between fore and rear inner peripheral surface portions (10B) and (10C) of a shaping air ring (10) in such a way as to define an outward projection passageway (15) conforming in shape with the segmental outward projections (12). At the time of mounting the rotary atomizing head (4) on the rotational shaft (3), the outward projections (12) are put in a conforming angular position relative to the outward projection passageway (15) to pass the inward projections (14).

Abstract: Segmental outward projections (12) are provided at radially opposite positions on the circumference of a tubular mount portion (7) of a main body (5), and truncated side portions (13) are provided between and at the opposite sides of the segmental outward projection (12). On the other hand, D-Shaped inward projections (14) are projected radially inward from a boundary portion between fore and rear inner peripheral surface portions (10B) and (10C) of a shaping air ring (10) in such a way as to define an outward projection passageway (15) conforming in shape with the segmental outward projections (12). At the time of mounting the rotary atomizing head (4) on the rotational shaft (3), the outward projections (12) are put in a conforming angular position relative to the outward projection passageway (15) to pass the inward projections (14).

Abstract: A paint cartridge is provided with a wash fluid passage in communication with a paint chamber, along with a wash fluid valve adapted to open and close the wash fluid passage. Provided on the side of a replenishing stool are a replenishing valve which supplies or discharges paint to or from the paint chamber, an extruding thinner feed/discharge valve which supplies or discharges paint-extruding thinner to or from an extruding thinner chamber, and a wash fluid supply valve which supplies a wash fluid to the paint chamber through the wash fluid passage. Accordingly, upon opening the replenishing valve, wash fluid supply valve and wash fluid valve, a wash fluid from the wash fluid supply valve is allowed to flow into the paint chamber through the wash fluid passage and discharged through a feed tube to wash away deposited paint therefrom.

Abstract: When replacing a paint cartridge (25) on the coating apparatus (11), a replenished paint cartridge of a next paint color is picked up from one of paint replenisher units (55a to 55n) by one gripper member (101) of a cartridge gripper (100). In the next place, while the replenished paint cartridge (25) is being continuously gripped on one gripper member (101), a consumed or empty paint cartridge (25) is gripped and removed from the housing (12) by the other gripper member (102). Then, the replenished paint cartridge on one gripper member (101) is loaded on the housing (12), and the empty paint cartridge (25) is returned to a corresponding one of the paint replenisher units (55a to 55n). Thus, the paint cartridges (25) can be replaced in a significantly simplified manner.

Abstract: An apparatus for replenishing paint into a paint cartridge (25), which is capable of putting paint in respiratory circulation while the cartridge is in a waiting state. The apparatus includes a replenishing valve (61) which is capable of feeding paint to and from a paint chamber (30) of the paint cartridge (25) which is set on a replenishing stool (52), and a respiratory paint circulation valve (91) which is capable of feeding paint-extruding thinner to and from a thinner chamber (31) of the cartridge. After switching the replenishing valve (61) to a drain or discharge side, paint-extruding thinner is supplied from the respiratory paint circulation valve (91) to push paint out of the paint chamber (30) of the cartridge (25). Then, after switching the replenishing valve (61) to the side of a paint supply source, paint-extruding thinner is discharged by way of the respiratory paint circulation valve (91) to suck paint into the paint chamber (30).

Abstract: In a color A area coating stage, color A paint is coated on a vehicle body (12) to form a color A coating (PA). In a next border zone coating stage, a border zone coating (PB1) is formed by means of a rotary atomizing head type sprayer unit (31) which is tilted with respect to a coating surface of the vehicle body (12) and adapted to spray color B paint toward the vehicle body (12) solely by centrifugal force. In a succeeding belt zone coating stage, a belt zone coating is formed continuously from the border zone coating (PB1) by means of a tilted rotary atomizing head type sprayer unit. In a next remainder area coating stage, a remainder area coating is formed on remaining areas of the coating surface continuously from the belt zone coating. By these arrangements, sprayed color B paint particles are allowed to deposit and settle on the vehicle body (12) without rebounding when applying the border zone coating (PB), forming a clear and well-defined border line (BL).