A new and improved hot melt adhesive or other thermoplastic material dispensing system comprises two separate and independent rotary gear-type metering pumps with two separate and independent supply sources and fluid supply passageways, or two separate and independent sets of rotary gear-type metering pumps with two separate and independent supply sources and fluid supply passageways, which are able to independently output precisely metered amounts of the hot melt adhesive materials simultaneously onto a particularly substrate through suitable output devices so as to result in a multitude of different hot melt adhesive patterns and at different locations.

A fluid dispensing apparatus is disclosed. Systems include an in-line or linear bladder apparatus configured to expand to collect a charge of fluid, and contract to assist with fluid delivery and dispensing. During a dispense-off period process fluid can collect in this bladder after the process fluid is pushed through a fine filter (micro filter). A given filtration rate can be less than a dispense rate and thus the system herein compensates for filter-lag that often accompanies fluid filtering for microfabrication, while providing a generally linear configuration that reduces chances for defect creation.

An apparatus for melting and dispensing thermoplastic material is provided that includes an un-heated hopper having an inlet for receiving particles of a thermoplastic material and an outlet for discharging the particles and a heated manifold including at least one cavity formed therein and having an inlet and an outlet the inlet communicating with the outlet of the hopper for receipt of the particles from the hopper. The hopper is disposed external of the heated manifold. The heated manifold is effective for melting the particles into molten thermoplastic material therein. The apparatus further includes a pump having an inlet in fluid communication with the cavity. An outlet of the pump is in fluid communication with an inlet of a dispenser and an outlet of the dispenser is effective for dispensing the molten thermoplastic material therethrough.

The invention relates to a dosing system (1) for a dosing material having a dosing device (5) with a housing (11), the housing (11) comprising a feed channel (80) for dosing material, a nozzle (40), a discharge element (31) and an actuator unit (10) coupled to the discharge element (31) and/or the nozzle (40). The dosing device (5) further comprises a dosing material reservoir (70) which is coupled to the housing (11) or integrated into the housing (11). The dosing system (1) has a plurality of temperature control devices (2, 2′, 2″) which are each assigned to different temperature zones (6, 6′, 6″) of the dosing system (1) in order to control the temperature zones (6, 6′, 6″) differently. At least one first temperature zone (6) is assigned to the dosing material reservoir (70) and at least one second temperature zone (6″) is assigned to the nozzle (40). Preferably, at least one of the temperature control devices (2, 2′, 2″), preferably at least the temperature control device (2) assigned to the dosing material reservoir (6), comprises a cooling device (3, 3′, 3″) having a cold source (93, 93′, 95, 99).

A method for controlling an ejector is disclosed, wherein the ejector comprises an actuator arrangement configured to eject a droplet of viscous medium onto a substrate, and wherein the droplet forms part of a sequence of a plurality of droplets. The method comprises obtaining a control parameter for controlling the operation of the actuator arrangement, and operating the actuator arrangement, using the control parameter, in order to eject the droplet. The obtained control parameter is based on at least one of: a time period between the droplet and a previous droplet in the sequence, a difference in target size of the droplet and a size of the previous droplet in the sequence, and the droplets position in the sequence.

Systems for removing gas from a sealant and transferring gas-less sealant to an applicator are provided. The system may comprise: a rotatable chamber including: a first opening for receiving sealant; a hollow conduit arranged such that when gas accumulates in the center of the rotatable chamber when the rotatable chamber is rotating, the gas is ventable from the rotatable chamber; a second opening for receiving gas-less sealant from the rotatable chamber after the gas is vented from the hollow conduit; and a motor operatively configured to rotate the rotatable chamber; and a gas-less sealant applicator in fluid communication with the second opening of the rotatable chamber such that gas-less sealant released by the second opening is flowable into the applicator. The system may also include a robot arm including an end effector with a sealant dispensing nozzle. A method for applying sealant to an aircraft structure is also provided.

The inventive concept provides an apparatus for processing a substrate. The apparatus includes a mount; a processing liquid supply nozzle configured to provide a processing liquid to the substrate and a discharge container including: a base plate including a liquid outlet and an exhaust port; an inner wall standing on an inner circumference of the base plate; an outer wall standing on an outer circumference of the base plate; and a barrier standing on the base plate to separate a first space connected to the liquid outlet from a second space connected to the exhaust port. The apparatus further includes an inner cover configured to guide the flow of a processing liquid from the substrate supported by the mount to the first space of the discharge container; and a flow guide mounted in the first space of the discharge container.

The present disclosure provides a curved surface coating device. The curved surface coating device includes a bracket having a first and second ends. The curved surface coating device includes a glue coating portion connected with the first end of the bracket. The curved surface coating device includes a transmission member connected between the first and second ends of the bracket and its distance from the first end of the bracket is adjustable. The curved surface coating device includes a first driving mechanism connected with the transmission member for driving the bracket to rotate about the transmission member as a center of rotation. The curved surface coating device includes a second driving mechanism connected with the bracket for driving the bracket to move on a line where the first end and the second end are located.

A valve seat assembly including a housing having a cavity and a puck located in the cavity and connected to the housing. The puck having a greater hardness than the housing.

A dispensing system can include a material delivery assembly that includes a tubular reservoir with a tubular extension, where the tubular reservoir includes a longitudinal axis; a nozzle body, where the tubular extension fluidly couples the tubular reservoir to the nozzle body; and a rotor coupling that operatively couples to the material delivery assembly for rotation of the tubular reservoir about its longitudinal axis.