An additive layer manufacturing apparatus comprising a doctor blade (57) having a tip (51) which, in use, is arranged proximal to a material layer (59) to be recoated during an additive layer manufacturing method, the doctor blade (57) having a cavity (50) with an inlet and an outlet, the outlet located at the tip (51) and the inlet connectable to an air supply (53) whereby air can be directed through the cavity (50) to the outlet and onto a surface (59a) of the material layer (59).

An apparatus for controlling deposition of material from a plasma transferred wire arc (PTWA) torch within a bore is provided. The apparatus includes a duct and a plurality of cannons. The duct includes a plurality of fluid passageways separated by cross-members. The plurality of cannons are disposed adjacent and downstream from the plurality of fluid passageways of the duct. The flow of fluid is simultaneously directed through all of the fluid passageways and the plurality of cannons and past the PTWA torch in the bore.

A contact nozzle for coating an elastic strand with an adhesive. Air is discharged at the adhesive in contact with the strand, causing the adhesive to spread around the periphery of the strand. The air assists with release of the adhesive from the nozzle and also cleans the nozzle to discourage adhesive build-up on the nozzle.

A contact nozzle for coating an elastic strand with an adhesive. Air is discharged at the adhesive in contact with the strand, causing the adhesive to spread around the periphery of the strand. The air assists with release of the adhesive from the nozzle and also cleans the nozzle to discourage adhesive build-up on the nozzle.

A metering device is disclosed for regulating the depth of flowable product coating a surface movable relative to the metering device by directing an air curtain towards the surface. The metering device comprises a body (10) having an interior chamber (12), an inlet for connecting the chamber to a source of gas under super-ambient pressure; and an opening (16) communicating with the chamber and having a mouth through which gas is discharged from the chamber towards the surface to form the air curtain. A porous or reticulated membrane (18) is secured to, or formed integrally with, the body of the device to lie in the path of the gas discharged through the mouth of the opening.

A metering device is disclosed for regulating the depth of flowable product coating a surface movable relative to the metering device by directing an air curtain towards the surface. The metering device comprises a body (10) having an interior chamber (12), an inlet for connecting the chamber to a source of gas under super-ambient pressure; and an opening (16) communicating with the chamber and having a mouth through which gas is discharged from the chamber towards the surface to form the air curtain. A porous or reticulated membrane (18) is secured to, or formed integrally with, the body of the device to lie in the path of the gas discharged through the mouth of the opening.

Provided is a method for manufacturing a hot-dip metal-coated steel strip. The method includes continuously dipping a steel strip in a molten metal bath, injecting a gas from gas injection ports of paired gas wiping nozzles arranged on both front and back surface sides of the steel strip onto the steel strip pulled-up from the molten metal bath to adjust an adhesion amount of molten metal which adheres to both surfaces of the steel strip, and continuously manufacturing a hot-dip metal-coated steel strip, in which the paired gas wiping nozzles are operated under defined conditions.

Proposed is an apparatus for inspecting and repairing a dispensed viscous fluid, the apparatus including a dispenser module dispensing a viscous fluid on a workpiece, a vision module generating original images by photographing the viscous fluid dispensed on the workpiece, a robot module moving the dispenser module and the vision module through predetermined paths, respectively, and a control module determining whether a defective part exists in the dispensed viscous fluid by analyzing the original images and controlling the dispenser module and the robot module to dispense a viscous fluid to a defective part when the defective part exists. Accordingly, a defect occurring in the viscous fluid dispensed on the workpiece can be repaired, and furthermore, the shape of the viscous fluid in the repaired part can be formed by using a correction module, thereby improving application quality.

Proposed is an apparatus for inspecting and repairing a dispensed viscous fluid, the apparatus including a dispenser module dispensing a viscous fluid on a workpiece, a vision module generating original images by photographing the viscous fluid dispensed on the workpiece, a robot module moving the dispenser module and the vision module through predetermined paths, respectively, and a control module determining whether a defective part exists in the dispensed viscous fluid by analyzing the original images and controlling the dispenser module and the robot module to dispense a viscous fluid to a defective part when the defective part exists. Accordingly, a defect occurring in the viscous fluid dispensed on the workpiece can be repaired, and furthermore, the shape of the viscous fluid in the repaired part can be formed by using a correction module, thereby improving application quality.

The invention relates to a device and a method for hot-dip coating a metal strip with a metal covering, wherein the metal strip is directed continuously through a melt bath, wherein the thickness of the metal covering present on the metal strip when it leaves the melt bath is adjusted by means of a scraping device, and wherein slag which is present on the melt bath is driven away from the metal strip leaving the melt bath by means of a gas flow. To prevent slag from coming into contact with the metal strip leaving the melt bath, the invention drives away the slag from the metal strip by means of at least one nozzle which is arranged in close proximity to the metal strip, that a gas flow which extends over the width of the metal strip is directed onto the surface of the melt bath.