The present invention relates to melter for processing substantially solid, free-flowing adhesive particulate and supplying liquid adhesive. The melter has a tank for receiving adhesive, a heating device coupled with said tank for heating and liquefying adhesive particles, at least one pump for conveying the liquid adhesive, and a filling device for filling the tank with the substantially solid, free-flowing adhesive particulate. The filling device is arranged such that adhesive particulate can be fed into the tank through an inlet opening of said tank. The invention also relates to a filling device for filling a tank of an adhesive melter with substantially solid, free-flowing adhesive particles.

A valve module with floating member for use in a fluid applicator and a fluid applicator comprising said valve module are disclosed. The fluid applicator further includes a valve module that is configured to control a flow of fluid from the chamber to the cavity. The valve module includes an upper valve seat and a valve stem operatively coupled to the drive pin and extending from the chamber to the cavity. The valve module further includes a retaining tip attached to the valve stem and a floating member disposed in the cavity between the opening and the retaining tip such that the valve stem passes through the floating member and the floating member is movable along a longitudinal axis of the valve stem.

An improved pneumatic jetting valve includes a housing with first and second chambers. A pneumatic piston is enclosed between the chambers. First and second solenoid valves are configured to respectively supply air pressure to the chambers and to exhaust the chambers. A controller is operable to regulate the pressurization and venting of the chambers. The controller controls the timing of control signals for the first and second solenoid valves to control the overlap time during which both the first and second chambers are pressurized. By controlling this overlap time, the controller controls the speed of the drive pin of the jetting valve and thereby the speed at which the valve closes to jet a droplet of material. This allows a valve speed to be selected that is most appropriate for the viscosity of the material being jetted. Numerous new methods for utilizing the improved jetting valve and system are disclosed.

An apparatus for conveying viscous material out of a barrel-like container having a container bottom and a container wall that extends upward from the container bottom has a follower plate for closing off the container, which plate is movable in the direction toward the container bottom, lying against the inner surface of the container wall, which surface faces the container interior, and which plate has a dome that extends upward from an underside intended to lie on the viscous material, which dome opens, in the center, into a material exit opening. The apparatus has a pump for conveying the viscous material through the material exit opening. At least one displacement body projects into the dome through the material exit opening and is connected with the pump for displacement of the material situated in the dome and/or air situated in the dome, and at least one closeable venting opening vents the dome.

A metering valve for viscous materials has a housing, a material channel extending in the housing and opening into material outlet openings, and a number of valve pins, which are movably mounted in the housing, the number corresponding to the number of material outlet openings, wherein a valve seat is associated with each valve pin and each valve pin is movable between a closed position, in which it sits on the valve seat associated with it and closes one of the material outlet openings, and an open position, in which the material outlet opening concerned is exposed. The valve pins are produced from carbide and are guided in a longitudinally displaceable manner through feed-through openings in a guide block arranged at a distance from the valve seats, wherein the guide block is produced from carbide, at least on the inner surfaces of the feed-through openings facing the valve pins.

A fluid supply cup, including a container. The container is arranged with an air-vent hole closed by a valve, a part of an edge of a side wall of the container surrounding a bottom extends downward to form a skirt for supporting the container; a corresponding position of the skirt corresponding to the air-vent hole is arranged with a corresponding gap, and a corresponding position of the valve and an edge of the skirt form a base for supporting the container. In the fluid supply cup, the base is formed by the gap cooperating with the corresponding position of the valve, preventing errors in an injection molding process from affecting normal placement of the fluid supply cup, and the valve can be quickly closed.

An intermittent valve includes: a valve main unit having: an inflow chamber, a supply chamber and a return chamber; a piston; a supply valve allowing a coating material to flow from the inflow chamber to the supply chamber when the piston is in a first position and blocking the flow when the piston is in a second position; and a return valve blocking the coating material from flowing from the inflow chamber to the return chamber when the piston is in the first position and allows the flow when the piston is in the second position. The valve diameter of the supply valve is 1.53 times or more the valve diameter of the return valve.

A jig for dispensing an underfilling material may include a jig body, a dispensing passage and an air passage. The jig body may be configured to cover a package substrate on which a semiconductor chip may be mounted via conductive bumps. The dispensing passage may be formed at one side of the jig body to dispense the underfilling material between the semiconductor chip and the package substrate. The air passage may be extended from the dispensing passage to the other side of the jig body. The jig body may accurately define a dispense region of the underfilling material on an upper surface of the package substrate. Thus, it may not be required to sensitively control a discharge amount of the underfilling material so that a waste of the underfilling material may be reduced. Further, when the underfilling material may make contact with the air passage with closing of the dispensing passage by the cover, the air lock may be formed in the air passage. Thus, a void may not be formed in the underfilling material. Furthermore, an overflow of the underfilling material may be prevented.

A dispensing unit includes a main housing having a main chamber, a reciprocating piston, a nozzle, and an adjuster assembly. The adjuster assembly includes an adjuster housing having an adjuster chamber co-axial with the main chamber. The adjuster assembly further includes an actuator disposed in the adjuster chamber and axially movable within the adjuster chamber. The actuator is configured to engage the reciprocating piston assembly and to drive the downward movement of the reciprocating piston assembly. The reciprocating piston assembly includes a first piston portion having a lower end configured to pressurize fluid within an orifice of the nozzle and a second piston portion that is separate from the first piston portion and having an upper end configured to engage the actuator. The first piston portion is configured to move a first distance and the second piston portion is configured to move a second distance.

A device for conveying viscous material to an applicator has a conveying cylinder in which a double-acting conveying piston is movable to and fro. The conveying cylinder has first and second chambers separated from one another by the conveying piston. Each chamber has a material inlet and outlet. A conveying device is connected to the material inlets for the pressurized introduction of viscous material into the conveying cylinder chambers, and a valve device closes and opens the material inlets and outlets. In a first switching position, the valve device opens the first chamber material inlet and the second chamber material outlet and closes the second chamber material inlet and the first chamber material outlet and, in a second switching position, releases the second chamber material inlet and the first chamber material outlet and closes the first chamber material inlet and the second chamber material outlet.