Abstract:
An adhesive laying machine has a nozzle 10 through which a bead 12 of adhesive is extruded onto a surface 14. The viscosity of the adhesive can vary, and in order to ensure that a bead of uniform dimensions is laid, a viscosity- dependent parameter is sensed and the result is fed back to the machine operation which is then altered to bring the parameter back to a predetermined value. Either the speed of the nozzle is altered, keeping the pumping pressure through the nozzle constant, or vice versa.
Abstract:
The invention relates to a system for applying sealant material to the welded seams of an automobile body. The apparatus of the invention includes a reciprocating piston pump for supplying the material under pressure from a reservoir to an overhead distribution manifold. From a manifold the material is supplied to a plurality of extrusion guns through drop lines, each of which includes a volumetric metering gear pump for maintaining a constant flow rate to said guns irrespective of pressure changes which may occur in the distribution manifold.
Abstract:
Un dispositif pour étaler des substances sur des maté riaux en ruban (0), qui comprend une tête d'extrusion (1, 2) et une barre tournante (22) portée par un organe de support (18) séparé et appliqué à la tête en position adjacente à la fente de débit (8) de la tête. La fente de débit a une cavité intérieure profilée (9) dans laquelle sont insérés des segments de lamelle de limitation qui s'étendent jusqu'au débouché de la fente (8) pour délimiter latéralement la zone d'étalement. En outre la barre tournante (22) a sa surface opérative limitée aux zones d'étalement et elle est creusée ou emportée dans les zones où il ne faut pas effectuer l'étalement, en évitant ainsi le contact de ces zones avec le ruban (0) ou avec le rouleau (13) sur lequel il s'appuie en correspondance de la barre tournante (22). Le dispositif permet d'effectuer l'étalement sur des largeurs réglables inférieures à la largeur de la tête d'extru sion (1, 2) ainsi que sur des bandes séparées les unes des autres par des zones non étalées.
Abstract:
Disclosed herein is a liquid applicator apparatus comprising a liquid dispensing nozzle (34;202) and a solvent- containing sump (66;212) in which the tip of the nozzle is stored to prevent nozzle clogging during periods of non-use. To simplify movement of the nozzle from its stored position to its liquid-dispensing position, the sump is movably (e.g. slidably or pivotally) mounted for movement away from the path of movement of the nozzle. Means (38,74,80,88; 228,236) are provided for coordinating the respective movements of the nozzle and sump.
Abstract:
An elongate nozzle (30), such as provided by a slice (20) in the delivery of feed stock from a headbox (12) to the Foudrinier wire (24) of a paper-making machine or by the lips of a sheet plastics extrusion die, has its delivery height profile (5) adjustable at points along the nozzle (30) by electro-hydraulic actuator devices (40) which are coupled to the upper slice lip (26) or one lip of the extrusion die. Each device (40) comprises a servo motor (130) whose piston (48) is coupled to the lip (26) and an electrically energized torque motor (110) which controls the servo motor (130) via a servo control valve (120). Each actuator (40) has a linear voltage differential transformer (LVDT) (60) connected with it to measure the local delivery height (5) of the nozzle (30). The torque motor (110) is controlled by an error signal dependent on the difference between an input signal (136) representing a desired height and a signal (132) from the LVDT representing actual height. In a paper-making machine the actuators (40) may be controlled by a computer (150) that determines a nozzle profile (5) in dependence upon a grammage profile measurement made on the paper web (174). The hydraulic fluid for a paper-making machine is preferably water-based to minimise contamination if leakage occurs.
Abstract:
An apparatus for coating the threads of articles such as fasteners, pipes, plugs, valves, fittings, etc., includes an indexing table for intermittently moving the articles along an arcuate path, rotatable article spindle assemblies on the table radially spaced apart an equal distance and being stopped at a dispensing station and at a wiping station spaced therefrom equal to such distance. A dispensing head at the dispensing station includes a nozzle for delivering a coating of the sealant onto the threads of a rotating article, and a wiper wheel at the wiping station wipes the coated threads and presses the coated sealant into the thread roots during rotation of the wheel which likewise rotates the coated articles.
Abstract:
In the coating of a strip article of indeterminate length, wherein the article is continuously advanced lengthwise past a dam while liquid coating material is supplied to a major surface of the article ahead of the dam, the article is passed through a gap of extended length immediately beyond the dam, the gap being defined between uniformly spaced walls one of which faces the article surface bearing the coating material. The spacing between the gap walls is equal to the thickness of the strip article plus a desired wet thickness of the layer of coating material. Coating material of different colours or shades may be supplied to different portions of the strip surface for producing coatings of varied patterns.
Abstract:
Máquina para aplicar a las cantoneras (3) el adhesivo inmediatamente antes de la fijación de dichas cantoneras (3) a las aristas del bloque paletizado, incorpora una bancada (1) en la que se define una base (2) de asiento para les cantoneras (3), por detrás de la cual una columna (4) sustenta un cabezal (5) dotado de un depósito de adhesivo con sus correspondientes medios dosificadores, y una boquilla (6) que suministra la dosis de adhesivo a la cantonera (3) en el punto elegido de la misma, mediante enfrentamiento de la cantonera a la boquilla y actuando sobre un pedal (7) de manera que el operario selecciona el número de puntos de adhesivo establecidos a lo largo de la cantonera (3) y su distanciamiento.
Abstract:
This invention provides the following coating device (10) wherein coating solution, continuously extruded through two slits (12) at constant intervals, as formed between two edges of the front end (14) consisting back edge (b) and front edge (f) in the moving direction of substrate, is adhered in such a manner to coat the ssurface of the moving substrate in a predetermined moving route, characterized in that each edge of said front end has a combination shape of flat surface or a protruded round-shape, the shortest distance (L1) between the vertical line passing through top point in back direction at front edge, and extended line of slit wall surface at front edge is 0.5 - 2 times of slit interval (d) and 0.5 times less than W1, the thickness of front edge, the distance (H) between horizontal lines passing through each top point of back edge and front edge is 0.5 - 2 times of slit interval (d), the shortest distance (L2) between vertical line passing through the top point at back edge and extended line of slit at back edge is 0.2 - 1.5 times of slit interval (d). By using a coating device according to this invention, good coating surface without coating defects, such as transverse step, stripe in the length direction, pin hole and overflow, may be obtained. In addition to that, the superior physical properties of final product may be obtained.
Abstract:
A coating insert (60) used within a coating assembly (10) for defining at least one edge of coating fluid as it is applied to a substrate moving past the coating assembly is disclosed. The coating assembly includes a trough (10) having first and second transverse ends. At least one coating insert (60) is inserted within the trough to define an edge of coated fluid on a substrate. The coating insert (60), having one or two edge-defining surfaces (70), is positioned within the trough. The first end of the edge-defining surface (70) is closer to the adjacent transverse end of the trough than the second end of the edge-defining surface. The top face of the coating insert may also include a second edge-defining surface having first and second ends that may define another edge of the coated fluid on a substrate.