Abstract:
A coating material quantity control system for the coating of articles in a production line operation having a plurality of coating material dispensing devices. Each device is connected to a plurality of coating material feed lines carrying various coating materials, each associated with a separate flow control device. A program control device, upon initiation of the selection of a new coating material type, assures the sequence of the necessary changeover operations. A common control is provided for the flow control devices associated with each coating material dispensing device. The program control device also controls control parameters in each such common control for the selected coating material type, and for variations in size of that portion of the article being coated which is before a particular coating material dispensing device.
Abstract:
A spraying arrangement having particular adaptability for use in combination with a conveyor installation characterized by conventional sprayer equipment for painting or coating production parts, where excess paint or coating material is deposited on a back up shield, the latter serving to overcome, or at least minimize, overspray.Particular importance of the arrangement lies in the fact that the load capabilities of the conveyor can be more fully utilized, i.e. the parts under process can be sprayed from opposite sides of the aforesaid shield, being mounted on the same conveyor hanger.The shield may be in the form of selectively movable porous material and, in the instance of electrostatic paint spraying, a grid, charged with the same electrical potential as the part, is disposed within passes of the shield for even more effective excess material collecting purposes.
Abstract:
A continuous processing system is disclosed wherein glass containers are coated with an exterior protective film of plastic resin which, when cured and quenched as prescribed, provides a clear transparent protective shield against bottle shattering either from internal gas pressures (as when containing carbonated beverages) or from rough external handling as by dropping on a hard surface. The process includes pre-heating of containers, applying powdered resin in a continuous electrostatic spray, passing the spray coated containers through a curing oven, air cooling the cured products and subsequent water quenching and drying before discharge from the system. The foregoing abstract is not to be taken either as a complete exposition or as a limitation of the present invention. In order to understand the full nature and extent of the technical disclosure of this application, reference must be had to the following detailed description and the accompanying drawings as well as to the claims.
Abstract:
An apparatus is provided for spray coating individual articles. The apparatus shown includes a conveyor for advancing the articles, a scanner for producing signals corresponding to the size and shape of the articles, a memory device for receiving signals from the scanner, and spray coating devices controlled by the memory device to provide a spray pattern for each article in accordance with its size and shape.
Abstract:
A method of depositing a metallic material onto a non-metallic substrate by depositing electrostatically charged particles of an admixture or solution including a thermally decomposable metal salt and a combustion retarding solvent to the non-metallic substrate. The non-metallic substrate is heated to an elevated temperature prior to the transference of the admixture to the substrate. The combustion retarding constituent of the admixture tends to partially decompose and vaporize at the elevated temperature of the non-metallic substrate and the metal salt tends to thermally decompose depositing a metallic material onto the non-metallic substrate. If the substrate is heated to a sufficiently high temperature, the metallic material tends to diffuse into a non-metallic substrate such as glass to thereby alter the color of the substrate. The solution to be formed into electrostatically charged particles contains a metal salt and a combustion retarding solvent.
Abstract:
A fluidic apparatus for and a method of controlling the spray emission time and the direction of movement of a reciprocating spray emitting device of a spray coating system.
Abstract:
The invention concerns apparatus for delivering metered quantities of powdered material towards a point of use, the said apparatus comprising a rotor having an outer perforated shell whose perforations are adapted to receive the powdered material, the rotor also having an inner perforated shell which is mounted within the outer perforated shell, means comprising a porous filling which spaces the inner shell from the outer shell, the said means closely contacting the outer perforated shell, powder supply means arranged to supply the powdered material as the rotor rotates to the perforations in successive portions of the outer perforated shell, and a fluid conduit which is disposed within the inner perforated shell and which is, at any moment, sealed to a portion thereof which is angularly spaced from the portion of the outer perforated shell which is being supplied with powdered material from the powder supply means, means to supply the fluid conduit with a fluid which will pass through the inner perforated shell and the porous filling, the powdered material being ejected from the perforations in the outer perforated shell and delivered in metered quantities towards the point of use.
Abstract:
941,183. Coating-apparatus. RANSBURG ELECTRO - COATING CORPORATION. Nov. 20, 1959 [Nov. 20, 1958], No. 39429/59. Heading B2B. Apparatus for the spray coating of articles comprises spraying means for forming a spray of liquid coating material particles, a plurality of sources of liquid for delivery to the spraying means, means associated with each source for controlling the delivery of liquid therefrom to the spraying means, a common operator for the delivery-controlling means selectively operable to cause delivery from any one source to the spraying means while preventing delivery from the others, and power-activated means energizable during delivery of coating material from the selected source so as in a predetermined cycle to terminate delivery of liquid from one source, and after a delay to initiate delivery of liquid from a different source. The apparatus may be arranged to supply solvent alone to the spraying means for a period after each lot of coating liquid, to clean the spray head. In the form shown in Fig. 3, paint from each of the containers 40a, 40b or 40c may be fed to an associated port delivering on to the internal face of a rotated electrostatic spraying head 10, e.g. in the case of the container 40a by means of a gear pump 41a, driven by an electric motor 43a. The flow of liquid delivered to the head through the conduit 31a is controlled by a compressed air operated on-off valve 42a, the compressed air for operating this being controlled by an air valve 45a, operated by a solenoid 51a which also controls the motor 43a. Further, a mixture of air and cleaning solvent from a pressurized container 46 may be supplied by a pipe 47 to a port delivering it to the internal surface of the head 10, and, if desired, to a nozzle directed against the external surface, the flow being controlled by a valve 48 operated by a solenoid 52. A cylindrical shroud 16 may be moved forward to surround the head 10 by a compressed air cylinder 19, the supply to which is controlled by a valve 50 operated by a solenoid 53. An electrical control panel 55 provides for operating the solenoids to deliver liquid from the one containers 40a, b or c to the atomizer while preventing delivery from the others, and for terminating the delivery of one paint to the head, supply of cleaning solvent to the head for a predetermined time, and initiating the delivery of another paint; preferably, the shroud is moved into spray-intercepting relation with the head during cleaning, and then retracted. In the apparatus of Fig. 6 a number of compressed air spray guns, such as 60a, 60c, radiate from a hub 61 which is charged to a high electrical potential by a source 73, and supported on an insulating column 62 which can be rotated by a D.C. motor 80 to bring a selected gun opposite an opening in a housing 64, the gun then being flanked by electrodes 74. Each gun is supplied by a paint line such as 75a and compressed air line (e.g. 76a) simultaneously controlled by a solenoid, e.g. 79a. The operation of motor 80 is controlled by a series of positioning solenoids 82a, b, c &c., a motor switch 83 mounted eccentrically on shaft 62, and a motor reversing switch 84. The operation of the apparatus is controlled by a series of push-buttons PB 11, 12, 13 &c. and a relay system contained in a control panel 85. On pressing one of the push buttons, the supply of paint and air to the operative paint-gun is cut off by operation of its associated solenoid 79, and the core of its associated solenoid 82 is retracted, allowing the switch 83 to initiate rotation of the shaft 62 by the motor 80. This movement is terminated by the switch 83 striking the core of another solenoid 82, which has meanwhile been protruded. The appropriate solenoid 79 is then operated to commence spraying of paint of another colour. In order to prevent the air and paint lines becoming tangled, rotation of the shaft 62 is restricted to less than 360 degrees by the switch 84, which, when it strikes a pin, not shown, causes reversal of the motor 80.