A barrel for use with a liquid spray gun platform to provide a liquid spray gun comprises a main body and an inseparable nozzle. The main body comprises at least one center air delivery passage and at least one liquid-handling passage. The inseparable nozzle defines a liquid-emitting orifice that is in fluid communication with the at least on liquid-handling passage of the main body, and defines a center air orifice that is in fluid communication with the at least on center air delivery passage of the main body.

A system (1, 101, 201) for spraying hot-melt adhesive onto glued surfaces comprising a melter (61) to heat hot-melt adhesive, an air compressor (60), a power and control system (63) and a gun (10). The gun (10) is connected to the melter (61) by a pipe (53) with screw connectors (54, 55), through which a hot-melt adhesive being heated flows, and the air compressor (60) by an air pipe (56) with screw connectors (57, 58) through which a pressurized compressed air flows. The gun (10) has a nozzle (20) with a hot-melt adhesive outlet or orifice (21) and a compressed air outlet (23). The pipe (53) through which flows the hot-melt adhesive having a viscosity between 2500 mPa.Math.s and 7000 mPa.Math.s and a temperature between 120° C. and 200° C., and a density between 0.8 kg/dcm.sup.3 and 1.4 kg/dcm.sup.3, and the air pipe (56) are fitted in an insulating layer of a hose (50), and wherein the throughput of the pipe (53) through which the hot-melt adhesive being heated flows is between 0.5 kg/h and 1.5 kg/h, while the air pipe (56) has a throughput between 0.1 m.sup.3/min and 0.6 m.sup.3/min.

A system (1, 101, 201) for spraying hot-melt adhesive onto glued surfaces comprising a melter (61) to heat hot-melt adhesive, an air compressor (60), a power and control system (63) and a gun (10). The gun (10) is connected to the melter (61) by a pipe (53) with screw connectors (54, 55), through which a hot-melt adhesive being heated flows, and the air compressor (60) by an air pipe (56) with screw connectors (57, 58) through which a pressurized compressed air flows. The gun (10) has a nozzle (20) with a hot-melt adhesive outlet or orifice (21) and a compressed air outlet (23). The pipe (53) through which flows the hot-melt adhesive having a viscosity between 2500 mPa.Math.s and 7000 mPa.Math.s and a temperature between 120° C. and 200° C., and a density between 0.8 kg/dcm.sup.3 and 1.4 kg/dcm.sup.3, and the air pipe (56) are fitted in an insulating layer of a hose (50), and wherein the throughput of the pipe (53) through which the hot-melt adhesive being heated flows is between 0.5 kg/h and 1.5 kg/h, while the air pipe (56) has a throughput between 0.1 m.sup.3/min and 0.6 m.sup.3/min.

An atomizing spray nozzle device includes an atomizing zone housing that receives different phases of materials used to form a coating. The atomizing zone housing mixes the different phases of the materials into a two-phase mixture of ceramic-liquid droplets in a carrier gas. The device also includes a plenum housing fluidly coupled with the atomizing housing and extending from the atomizing housing to a delivery end. The plenum housing includes an interior plenum that receives the two-phase mixture of ceramic-liquid droplets in the carrier gas from the atomizing zone housing. The device also includes one or more delivery nozzles fluidly coupled with the plenum chamber. The delivery nozzles provide outlets from which the two-phase mixture of ceramic-liquid droplets in the carrier gas is delivered onto one or more surfaces of a target object as the coating on the target object.

A fluid atomizer comprising a body having a front surface, a rear surface and a body axis extending from the front to rear surfaces. The body comprises a first fluid outlet disposed in the front surface of the body, a first fluid inlet, and a first fluid passageway connecting the first fluid inlet with the first fluid outlet. The first fluid outlet defines an arcuate slit. The body further comprises a second fluid outlet disposed in the front surface of the body, a second fluid inlet, and a second fluid passageway connecting the second fluid inlet with the second fluid outlet. A shelf having an attraction surface protrudes from the front surface of the body. The second fluid outlet is located between the first fluid outlet and the shelf. The atomizer can be used in apparatus and methods utilizing atomized fluid.

An atomizing spray nozzle device includes an atomizing zone housing that receives different phases of materials used to form a coating. The atomizing zone housing mixes the different phases of the materials into a two-phase mixture of ceramic-liquid droplets in a carrier gas. The device also includes a plenum housing fluidly coupled with the atomizing housing and extending from the atomizing housing to a delivery end. The plenum housing includes an interior plenum that receives the two-phase mixture of ceramic-liquid droplets in the carrier gas from the atomizing zone housing. The device also includes one or more delivery nozzles fluidly coupled with the plenum chamber. The delivery nozzles provide outlets from which the two-phase mixture of ceramic-liquid droplets in the carrier gas is delivered onto one or more surfaces of a target object as the coating on the target object.

A spray nozzle is disclosed that includes a nozzle body having a first portion with a cylindrical configuration and a second portion including a dome-shaped end wall. The first and second portions of the nozzle body define an internal fluid passage having a downstream end defined by the dome-shaped end wall. A flow control element is arranged at an inlet end of the internal fluid passage. The flow control element includes a pre-orifice through which fluid can enter the internal fluid passage of the nozzle body. First and second discharge orifices are provided in the dome-shaped end wall with each of the first and second discharge orifices being arranged on a respective one of opposing sides of an apex of the dome-shaped end wall. The first and second discharge orifices are configured to produce a fan-shaped fluid discharge pattern with each discharge orifice having an elongated slit-like configuration.

A spray nozzle is disclosed that includes a nozzle body having a first portion with a cylindrical configuration and a second portion including a dome-shaped end wall. The first and second portions of the nozzle body define an internal fluid passage having a downstream end defined by the dome-shaped end wall. A flow control element is arranged at an inlet end of the internal fluid passage. The flow control element includes a pre-orifice through which fluid can enter the internal fluid passage of the nozzle body. First and second discharge orifices are provided in the dome-shaped end wall with each of the first and second discharge orifices being arranged on a respective one of opposing sides of an apex of the dome-shaped end wall. The first and second discharge orifices are configured to produce a fan-shaped fluid discharge pattern with each discharge orifice having an elongated slit-like configuration.

A method for operating a hand-held spray device, wherein in a first step a target orientation of the spray nozzle relative to the operator control unit is defined, and wherein during operation a rotation of the spray device, brought about by manual movement of the spray, through a z swinging angle, about a z axis which is orthogonal with respect to the longitudinal axis and/or through a y swinging angle about a y axis which is orthogonal with respect to the longitudinal axis and orthogonal with respect to the z axis, by a single sensor and wherein the z swinging angle and/or the y swinging angle engage as interference variables in a closed-loop control circuit and make available closed-loop control variables in such a way that the spray nozzle retains its target orientation by means of closed-loop control of the swinging mechanism.

A method for operating a hand-held spray device, wherein in a first step a target orientation of the spray nozzle relative to the operator control unit is defined, and wherein during operation a rotation of the spray device, brought about by manual movement of the spray, through a z swinging angle, about a z axis which is orthogonal with respect to the longitudinal axis and/or through a y swinging angle about a y axis which is orthogonal with respect to the longitudinal axis and orthogonal with respect to the z axis, by a single sensor and wherein the z swinging angle and/or the y swinging angle engage as interference variables in a closed-loop control circuit and make available closed-loop control variables in such a way that the spray nozzle retains its target orientation by means of closed-loop control of the swinging mechanism.