Abstract: An electrical separating unit is disclosed for a fluid conveying line, in particular a paint conveying line, which has an elongated separating pipe that can be freed or closed at its ends by separating valves. The interior of the separating pipe can be brought by a compressor to a pressure that is significantly above atmospheric pressure or can be evacuated by a suction pump to a pressure that is significantly below atmospheric pressure. In both cases the electrical resistance of the separating unit has a significantly higher value than if a pipeline over a corresponding length was only freed from paint, solvent, or cleaning agent, and was filled with air.

Abstract: The invention concerns an electric separation unit (28) for a liquid supply pipe (12), in particular for a supply pipe used for paint. Said unit comprises a housing (30) having a chamber (34), wherein a discharge sheath (44) is arranged. The latter forms part of a fluid channel, which extends from the inlet (52) to the outlet (54) of the housing (30). The liquid contained in the sheath can be discharged by pressurizing the outer part of the discharge sheath (44) and compressing said sheath, an isolating passageway not containing any liquid passage being thus obtained.

Abstract: A pig for conveying a working medium inside a feed line comprises a pig body which can be driven inside the feed line by a pushing medium and which has on one front side a projection with a free front surface. The pig also contains at least one first and one second circumferential sealing element arranged on the pig body which are made of elastomeric material and which are at a distance from each other in the direction of the longitudinal axis of the pig body and which run coaxial to the longitudinal axis of the pig body. The sealing elements can be pressed against the inner wall of the feed line, in that the working medium or the pushing medium bears against a contact surface of the respective sealing element. The contact surface of the sealing element neighboring the front side with the projection is smaller than the contact surface of the other sealing element.

Abstract: An electrical separating unit is disclosed for a fluid conveying line, in particular a paint conveying line, which has an elongated separating pipe that can be freed or closed at its ends by separating valves. The interior of the separating pipe can be brought by a compressor to a pressure that is significantly above atmospheric pressure or can be evacuated by a suction pump to a pressure that is significantly below atmospheric pressure. In both cases the electrical resistance of the separating unit has a significantly higher value than if a pipeline over a corresponding length was only freed from paint, solvent, or cleaning agent, and was filled with air.

Abstract: A reservoir for powdery media, in particular powder coating, comprises a housing having at least one inlet and at least one outlet for the powdery medium. A fluidising floor of porous, air-permeable material is located in the interior of the housing at a distance from its base. A pressure chamber which is chargeable with compressed air is located between the fluidising floor and the base of the housing. The outlet has the shape of an upwardly open funnel which is located in the lower partial zone of the housing adjacent to the fluidising floor. In this way well-mixed powdery medium the grain-size distribution of which corresponds to the maximum extent to that of the fluidised powdery medium inside the reservoir is always withdrawn.

Abstract: A reservoir for powdery media, in particular powder coating, comprises a housing having at least one inlet and an outlet. A fluidising floor of porous, air-permeable material is located in the interior of the housing at a distance from its base. In this way a pressure chamber which is chargeable with compressed air is formed between the fluidising floor and the base of the housing. In order to reduce the quantity of compressed air required for fluidising and to keep low the mechanical stress imposed on the powdery medium when in the fluidised state, the cross-section of the housing narrows downwardly towards the fluidising floor. In addition, this shape of the housing generates turbulence in the fluidised powdery material.

Abstract: A powder source for a powder coating plant comprises a storage vessel for powder and a star feeder metering unit, provided on its outlet. The outlet of the latter is connected to the inlet of a conditioning vessel, which has a permeable base section impinged by compressed gas and transfers metered powder and air to a fluid mixture, which is drawn off through an outlet at the lower end of the conditioning vessel.

Abstract: A high-speed rotary atomiser for applying powder coating includes a housing together with a rotatable bell disc arranged at the front of housing A guidance air arrangement in the form of a rotationally symmetrical air guidance body coaxial to bell disc is provided for shaping the powder cloud generated by the high-speed rotary atomizer, which air guidance body is mounted on the front of housing. Air guidance body has a jacket surface to which guidance air be so supplied that it flows forwards along jacket surface as a substantially rotationally symmetrical air curtain along jacket surface. The air curtain flowing over the jacket surface of air guidance body impinges on the powder cloud generated by bell disc and shapes it according to the quantity and velocity of the air curtain and according to the geometry of air guidance body.

Abstract: A reservoir for powdery media, in particular powder coating, comprises a housing having at least one inlet and an outlet. A fluidising floor of porous, air-permeable material is located in the interior of the housing at a distance from its base. In this way a pressure chamber which is chargeable with compressed air is formed between the fluidising floor and the base of the housing. In order to reduce the quantity of compressed air required for fluidising and to keep low the mechanical stress imposed on the powdery medium when in the fluidised state, the cross-section of the housing narrows downwardly towards the fluidising floor. In addition, this shape of the housing generates turbulence in the fluidised powdery material.

Abstract: An installation for coating objects with a powder, in particular for powder painting, comprises a booth, in which powder can be applied to the objects, a recovery device for the excess powder, which does not adhere to the objects during coating, a storage container for fresh powder and a mixing container, which can be supplied with excess powder from the recovery device and fresh powder from the storage container. A screening machine is arranged in the immediate vicinity of the mixing container, preferably directly beneath the latter, and serves at the same time as an application container, in which mixed powder can be temporarily stored for removal by the application device. The screening machine is not subjected to any low-frequency vibrations, so that a weighing device, which continuously measures the weight of the screening machine, measures the instantaneous consumption of mixed powder in real time.

Abstract: A reservoir for powdery media, in particular powder coating, comprises a housing having at least one inlet and at least one outlet for the powdery medium. A fluidising floor of porous, air-permeable material is located in the interior of the housing at a distance from its base. A pressure chamber which is chargeable with compressed air is located between the fluidising floor and the base of the housing. The outlet has the shape of an upwardly open funnel which is located in the lower partial zone of the housing adjacent to the fluidising floor. In this way well-mixed powdery medium the grain-size distribution of which corresponds to the maximum extent to that of the fluidised powdery medium inside the reservoir is always withdrawn.

Abstract: A high-speed rotary atomizer for applying powder coating includes a housing to the front end of which a bell disc is rotatably mounted. Bell disc is driven by a motor arranged inside housing. At least one powder supply channel passes through housing, and emerges at the front of housing. This channel contains an acceleration jet in which the coating powder particles are accelerated to a higher velocity which is maintained over at least a certain distance. The increased velocity, preferably supported by acceleration air forming a surface layer, prevents coating powder particles from being deposited on the walls of powder supply channel. In this way an insulating section is formed by which a backflash of the high voltage used to ionise the coating powder particles, from the internal electrode of the high-speed rotary atomizer towards the powder supply, is prevented.

Abstract: A high-speed rotary atomizer for applying powder coating comprises in a known manner a housing (1), in which a motor (13) is accommodated. The motor (13) rotates a bell-shaped plate (16) which is disposed at the front of the housing (1). At least one powder supply duct (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) leads through the housing and opens at the front of the housing (1). Its cross section can therefore be kept very large, thereby increasing the powder output of the high-speed rotary atomizer. This also enables a plurality of powder supply ducts (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) to be laid, which in turn results in a higher powder throughput and improved homogeneity of the powder cloud which is produced.

Abstract: An installation for coating objects with a powder, in particular for powder painting, comprises a booth, in which powder can be applied to the objects, a recovery device for the excess powder, which does not adhere to the objects during coating, a storage container for fresh powder and a mixing container, which can be supplied with excess powder from the recovery device and fresh powder from the storage container. A screening machine is arranged in the immediate vicinity of the mixing container, preferably directly beneath the latter, and serves at the same time as an application container, in which mixed powder can be temporarily stored for removal by the application device. The screening machine is not subjected to any low-frequency vibrations, so that a weighing device, which continuously measures the weight of the screening machine, measures the instantaneous consumption of mixed powder in real time.

Abstract: A high-speed rotary atomizer for applying powder coating comprises in a known manner a housing (1), in which a motor (13) is accommodated. The motor (13) rotates a bell-shaped plate (16) which is disposed at the front of the housing (1). At least one powder supply duct (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) leads through the housing and opens at the front of the housing (1). Its cross section can therefore be kept very large, thereby increasing the powder output of the high-speed rotary atomizer. This also enables a plurality of powder supply ducts (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) to be laid, which in turn results in a higher powder throughput and improved homogeneity of the powder cloud which is produced.

Abstract: A high-speed rotary atomiser for applying powder coating includes a housing (1) together with a rotatable bell disc (16) arranged at the front of housing (1). A motor (13) driving bell disc (16) is accommodated in housing (1). At least one powder supply channel emerging at the front of housing (1) passes through housing (1). A guidance air arrangement in the form of a rotationally symmetrical air guidance body (37) coaxial to bell disc (16) is provided for shaping the powder cloud generated by the high-speed rotary atomiser, which air guidance body (37) is mounted on the front of housing (1). Air guidance body (37) has a jacket surface (39, 43) to which guidance air can be so supplied that it flows forwards along jacket surface (39, 43) as a substantially rotationally symmetrical air curtain. In addition, air guidance body (37) has an axial through-bore (38) through which the coating powder flows towards bell disc (16).

Abstract: A high-speed rotary atomiser for applying powder coating includes a housing (1) to the front end of which a bell disc (16) is rotatably mounted. Bell disc (16) is driven by a motor (13) arranged inside housing (1). At least one powder supply channel (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) passes through housing (1), and emerges at the front of housing (1). This channel contains an acceleration jet (27, 28) in which the coating powder particles are accelerated to a higher velocity which is maintained over at least a certain distance. The increased velocity, preferably supported by acceleration air forming a surface layer, prevents coating powder particles from being deposited on the walls of powder supply channel (28, 29, 22, 23, 24, 25, 11, 12, 9, 10). In this way an insulating section is formed by which a backflash of the high voltage used to ionise the coating powder particles, from the internal electrode (4) of the high-speed rotary atomiser towards the powder supply, is prevented.