Systems and methods for closed loop fluid velocity control for jetting are disclosed. A method includes dispensing a first volume of viscous fluid from a nozzle of a dispensing device according to a first value of an operating parameter that affects the exit velocity of the first volume. A characteristic of the first volume is measured using a sensor. The characteristic of the first volume is then compared to a range of values to determine whether the characteristic of the first volume is outside of the range. The value of the operating parameter is adjusted to a second value in response to determining that the characteristic of the first volume is outside the range. A second volume of viscous fluid is dispensed according to the second value of the operating parameter. The exit velocity of the second volume is different than the first volume.

A method includes distributing a powder onto a first sheet, periodically closing a distribution port by a first opening-closing portion, and periodically closing the distribution port by a second opening-closing portion in the same cycle period as that of the first opening-closing portion and at a timing later than that of the first opening-closing portion. The method also includes moving the second opening-closing portion such that it extends from an upstream-side edge of the first opening-closing portion toward an upstream side of a movement direction, during a time period during which the upstream-side edge of the first opening-closing portion overlaps the distribution port. Further, the method includes setting a difference between timings at which the first and second opening-closing portion overlap the distribution port, respectively.

A device and method for dispensing a flowable medium which is an adhesive, a hot glue or a hot melt adhesive. The device has a housing with an interior space and a rod mounted in the housing, wherein the rod is movable by means of an actuator between a first end position and a second end position in an axial direction. The device comprises a diaphragm, wherein the rod passes through the diaphragm, wherein the diaphragm is mounted in a sealed manner in the housing radially on the outside and is mounted in a sealed manner in the rod radially on the inside, wherein the diaphragm divides the interior space into a first cavity and a second cavity and separates the first cavity from the second cavity in a fluid tight manner, and wherein the first cavity serves to hold the flowable medium. The device has at least one channel which opens into the first cavity and through which the flowable medium can flow into the first cavity, and a dispensing opening into the first cavity for dispensing the flowable medium, wherein the rod has a sealing section, and wherein the sealing section closes the dispensing opening in the first end position and is arranged at a distance from the dispensing opening in the second end position. A pressure medium acting on the diaphragm is arranged in the second cavity.

A device for dispensing a flowable medium, includes a housing having a cavity for receiving the flowable medium, a rod mounted in a bearing section of the housing, wherein the rod is movable by means of an actuator between a first end position and a second end position in an axial direction, a dispensing opening, opening into the cavity, for dispensing the flowable medium, wherein the rod has a sealing section, wherein the sealing section closes the dispensing opening in the first end position and is arranged at a distance from the dispensing opening in the second end position, a bellows seal for sealing off the bearing section from the cavity, wherein the rod passes through the bellows seal, wherein the bellows seal is mounted in a sealed manner on the rod and in a sealed manner on the housing, wherein a first section of the bellows seal is connected to the rod in a manner fixed relative to the rod, and a second section of the bellows seal is connected to the housing in a manner fixed relative to the housing, wherein the bellows seal has at least one compensating section for compensating an axial compression or extension of the bellows seal, wherein the compensating section projects radially relative to adjoining regions of the bellows seal, and having at least one channel, opening into the cavity, through which the flowable medium can flow into the cavity, wherein a projection of a center line of a channel section of the at least one channel, said channel section opening into the cavity, onto a projection plane formed perpendicularly to the axial direction forms a circle tangent of a circle formed concentrically with the rod.

The present invention relates to a system for circulating a slurry including, a coating die for applying a electrode active material slurry on the current collector; a tank for supplying the electrode active material slurry to the coating die; and a circulation piping for connecting the coating die and the tank, wherein the slurry circulates through the circulation piping connected from at least one of the left surface, the right surface, the rear surface, and the lower surface of the coating die to the tank at the time of a line stop.

A method for controlling a recirculation pump assembly is disclosed. The method includes receiving a process-dependent characteristic and determining a recirculation flow rate of adhesive that flows to the recirculation pump assembly based on the process-dependent characteristic. The method further includes determining a recirculation pump speed of the recirculation pump assembly for pumping the adhesive to a supply channel using the recirculation flow rate, and adjusting an operating speed of the recirculation pump assembly to match the recirculation pump speed. A system and storage device for performing the above method are also disclosed.

Problem: To supply a device and a method for accurately discharging a fixed amount of a liquid, the liquid containing solid particles, in a state that the solid particles are dispersed in the liquid material. Solution: A discharge device for a liquid material containing solid particles includes a first reservoir, a first air pressure supply pipe, a metering portion having a metering hole, a plunger moving back and forth in the metering hole, a nozzle, a switching valve having a first position and a second position, a plunger driver, and a switching valve driver. The discharge device further includes a second reservoir, a second air pressure supply pipe, a branch portion provided in an upper portion of the metering hole and having a branch flow path, and an opening/closing mechanism that establishes or cuts off communication between the second reservoir and the metering hole. In the discharge device, the liquid material inside the first reservoir can be transferred to the second reservoir, and the liquid material inside the second reservoir can be transferred to the first reservoir. A discharge method is carried out using the discharge device.

The present disclosure describes a method and system for controlling dispensing of adhesive from an applicator. The method includes pumping adhesive from a plurality of pump assemblies to a plurality of dispensing modules and measuring current draw from each of the plurality of pump assemblies. The method also includes determining an adjustment to an operating speed of each of the plurality of pump assemblies individually based on their respective current draws and adjusting the operating speed of each of the plurality of pump assemblies individually.

A system and method for dispensing an injection material to an injection point. The injection material is stored in a tank and disposed to parallel piped vessels. An orifice is disposed in piping connected to discharge ends of the vessels, and has an opening with a designated cross sectional area. A high pressure fluid drives the injection material to the injection point; the pressure of the high pressure fluid is regulated with a pressure control valve. Valves in the inlet and discharge piping connected to the vessels are selectively opened and closed so that injection material flows to and from the vessels. Vessels vent to a recycle/recovery system to reduce vessel pressure enabling refilling with injection material. Valves in the pressurizing and depressurizing lines are selectively opened and closed to depressurize and refill the vessels to have continuous chemical injection to the injection location.

An application device for applying a flowable medium onto a substrate, having a discharge valve having a closure member which, in its open position, releases a metering opening of the discharge valve, such that the flowable medium can flow through the metering opening in the direction of the substrate, wherein the closure member is movable by an electromagnet of the discharge valve from a closing position, in which it closes the metering opening, to an open position, and having a main control unit, which is connected to the discharge valve, and which delivers electrical output voltage signals which moves and maintains the closure member to the open position. A modification unit is arranged between the main control unit and the discharge valve, which is configured such it receives output voltage signals from the main control unit, modifies these signals and relays the latter in a modified form to the electromagnet.