Abstract:
A paint cartridge includes a baggy tank having a dual structure formed by an inner bag and an outer bag in a cylindrical body. Inside the inner bag is a paint chamber. Between the outer bag and the cylindrical body, an extruding liquid flows. A detector provided in the space between the inner bag and the outer bag is visually observable from outside the cylindrical body. In the detector, a pattern formed by using one or more materials changes due to contact with paint which leaks when the inner bag has broken or with extruding liquid which leaks when the outer bag has broken. In consequence, it is possible to detect the breakage of the inner bag and the outer bag by visually observing a change in the detector's pattern from the outside.
Abstract:
A cartridge discharges paint in a paint chamber from a feed tube by displacing a piston in a tank. A waste liquid adjusting valve located on a downstream side of a waste liquid passage on-off valve and including a throttle passage is provided in a waste liquid passage to be connected to the feed tube. This waste liquid adjusting valve is opened at the time of washing clean the paint chamber and a paint supply passage of the feed tube to widely enlarge the passage cross-sectional area of the waste liquid passage. When paint is replenished into the paint supply passage, the waste liquid adjusting valve uses the throttle passage as a flow passage to narrowly throttle the passage cross-sectional area of the waste liquid passage. The amount of discarded paint which flows out from the feed tube is thereby reduced.
Abstract:
An atomizer (2) with a rotary atomizing head (4) is mounted on the front side of a housing member (6) in which an air motor (3) is accommodated. A primary external electrode (8) is located around the outer peripheral side of the housing member (6) in such a way as to encircle the housing member (6). A secondary external electrode (10) is located on the front side of the housing member (6), in a position closer to the rotary atomizing head (4) than the primary external electrode (8). A first high voltage (V1) in the form of a direct-current voltage is supplied to the primary external electrode (8) from a first high voltage generator (11). On the other hand, a second high voltage (V2), in the form of a pulsating voltage (V2p) consisting of a series of intermittent pulses in a range lower than the first high voltage (V1), is supplied to the secondary external electrode (10) from a second high voltage generator (12).
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:
A common body (15) of a coater unit (14) is mounted on a robot device (13). A common body gripper (33) is fixedly mounted on a fixed plate (32) of an atomizing head changing and washing device (31). At the time of replacing a used atomizing head (19′) and a used paint cartridge (24′) by a washed atomizing head (19) and a replenished paint cartridge (24), respectively, the common body (15) is gripped and located in a predetermined position by the common body gripper (33). When the common body (15) is gripped by the common body gripper (33), the robot device (13) is put in a reduced power mode attenuating driving forces to leave said common body (15) in a freely movable state by application of an external force.
Abstract:
An atomizer including an air motor and a rotary atomizing head is mounted in a front side of a housing member, outer surfaces of which are covered in a cover member. Further, a high voltage discharge electrode assembly is provided around a front side of the housing member, with an outer periphery of the cover member circumvented by a blade ring of the high voltage discharge electrode assembly. An edge portion in the shape of a thin blade is provided at a projected rear end of the blade ring. Thus, an electric field is concentrated at the edge portion to induce a corona discharge on and around the entire blade ring.
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:
Two sprayer units are arranged along a conveyer. A coating surface of a panel conveyed by the conveyer is divided into four coating areas. Then, the sprayer units reciprocate parallel to the conveying direction and coat the individual coating areas. At this time, at the boundaries of the coating areas, the positions of the turning paths for reciprocation of the sprayer units are shifted from the front side to the rear side in the conveying direction and step-like coating trajectories are formed. As a result, the size of the area coated by each of the sprayer units can be expanded.
Abstract:
A round outer periphery of a valve mount member (17) is provided at a rear end portion (3D) of a housing (3) of a main coater body (2), main component valves (22) and wash fluid valve (30) of a main component valve assembly (21) are detachably mounted along with hardener valves (35) and wash fluid valve (36) of a hardener valve assembly (34), a trigger valve (40) and a front end washing valve (43) by means of a clamping mechanism (28). Thus, the respective main component valves (22) and hardener valves (35) are located in positions in the proximity of a rotary atomizing head (5) of the main coater body (2), realizing a significant reduction in length of paint supply passages, permitting to carry out a washing operation in an efficient manner. Besides, the respective main component valves (22) and hardener valves (35) can be detachably mounted on the valve mount member (17) easily by screw members (29) of clamping mechanisms (28), permitting to perform replacement jobs efficiently.
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).