Abstract:
A die coating method and apparatus includes a die (40) having an upstream bar (64) with an upstream lip (60) and a downstream bar (66) with a downstream lip (62). The upstream lip is formed as a land (68) and the downstream lip is formed as a sharp edge (70). Coating fluid exists the die (40) from the slot to form a continuous coating bead between the upstream die lip, the downstream die lip, and the surface being coated. A metering roller (332) removes excess coating fluid from the coated web. The apparatus can include a roller (330) on which the coating fluid is initially coated and which contacts a web. A doctor blade (338) or a metering roller removes excess coating fluid from the roller.
Abstract:
A nozzle assembly for use in separation apparatus for separation of liquid suspensions, a separation apparatus including such a nozzle assembly (1), and a method for its use. In the nozzle assembly (1), the outlet end of the nozzle is biasable towards the inner surface of the rotatable screening drum (7) of the separation apparatus, and tracking means (6) are provided on the nozzle to contact the drum (7) and maintain a substantially constant distance between the nozzle outlet and the drum surface. The outlet end of the nozzle can be swivelable relative to the feed means of the nozzle. The tracking means (6) can comprise a roller or a pad.
Abstract:
A surface of a 3-D object is digitized automatically and stored in a memory (88). Based on the signal representation, the 3-D object areas of the surface are defined for color and boundaries. Coatings application paths are defined within each area and various parameters for applying coatings for each point in each path are also defined including spray pattern, amount of coatings to be applied, speed of application along the path, among others; for each area, the points of the selected path are correlated with the angle of attack, spray pattern, amount of coatings and speed. A set of programmed instructions are compiled for execution in a general purpose computer. An assembly line of objects to be painted may then be set up and the retrieved instructions executed.
Abstract:
A method of providing a protective skin around a core (20) of an umbilical structure comprising the application of one or more lines of fluent covering material to the surface of the core to form a substantially even and regular coating followed by curing and drying the coating is described herein. The lines may be of helical (28) or longitudinal (85) form. The covering material may be a two part polyurethane composition. Apparatus adapted to apply helical windings (28) of covering material to a core is also described.
Abstract:
A device (1) is disclosed for supplying a pourable, paste-like and/or gaseous substance (9) to an application site which extends in the longitudinal direction of the device and for applying the substance, in particular by means of a doctoring element (91, 92, 93), to an application surface (81) which extends over a large width along the application site. The flow of substance is supplied in three steps. In the first step (I), a connection duct (5) designed as a pipe, hose or the like gathers the substance, forms a centralised flow of substance and supplies it to the device. In a second step (II), the flow of substance is subdivided by a substance flow subdividing arrangement into a plurality of flowpaths uniformly distributed over the width of the application site. In a third step (III), a layer of substance having a homogeneous surface and a uniform thickness over the whole width of application is spread on the application surface.
Abstract:
A one-piece nozzle (14) adapted for use within an adhesive dispenser (10) includes a nozzle body (14) formed with a throughbore (40) having a discharge outlet (44) within a nozzle tip portion (42) which emits a bead of adhesive. A nozzle cap (38) mounts the nozzle body (14) to the adhesive dispenser (10) such that an adhesive passageway (30) within the dispenser (10) communicates with the throughbore (40) in the nozzle body (14) and a plunger valve (22) associated with the adhesive dispenser (10) extends into the nozzle body (14) in position to engage a seat (46) formed at the nozzle tip. A number of air jet bores (110) are drilled in the nozzle body (14), each communicating with an air passage (140) formed between an outer surface (96) of the nozzle body (14) and an inner surface (130) of the nozzle cap (38), which discharge jets of air into contact with the adhesive bead producting an elongated adhesive fiber deposited in a spiral pattern onto a substrate.
Abstract:
An apparatus (10) for coating a pattern of spaced discrete patches (12) on a web (14) of material includes an extrusion die (18) and a metering pump (20) which supplies coating fluid to the extrusion die (18) from a fluid reservoir (24). A valve (26) directs fluid to either the extrusion die (18) or the fluid reservoir (24) and a piston provides a pulsed flow of fluid to the extrusion die (18). A controller, including a digital preset counter, controls the length of the coated portions of the web (14), the distance between the coated portions of the web (14), and the timing of the valve (26) with respect to the operation of the piston (28).
Abstract:
The description relates to a device (10) for the intermittent application of a fluid to a substrate with a valve actuated by a pressure medium which opens a fluid chanel leading from an inlet (30) to an application nozzle (38) or the like in a controlled manner and has a valve needle (70) co-opoerating with a valve seat (36) which bears in coaxial array a piston (80) movable to and fro in a cylinder (42) in the direction of the axis of the valve needle (70) and having a central drilling through which the valve needle (70) passes. Thereby the piston (80) is shrunk on the valve needle (70) and there is a further intimate connection between the piston (80) and the valve needle (70) which is produced after the shrunk joint has been made.
Abstract:
A method and device for applying liquid, in which, for applying liquid onto the base film by the use of an extrusion type applying head, a flexible body is outwardly extended from the slit opening on the downstream side of the liquid flowing slit of the extrusion type applying head so as to be in contact with the surface of a base film moving continuously, whereby liquid emitted from the liquid flowing-out slit and to be applied onto the base film is evenly applied while being smoothed by the flexible body without causing uneven thickness or streaks of liquid even over a wide range of application conditions.