EP4108413

[0001] To form a foamed body in which bubbles are appropriately dispersed in a paste material, without clogging a nozzle. [0002] A dispenser 1 used for discharging a mixture of gas and a paste material includes: a nozzle part 2 provided in a tip end part of a body 11 and having a tip end opening 22 through which the mixture is discharged; a flow path 4 for the mixture extending from an introduction part 5 for the mixture to the tip end opening 22 through a hollow space 20 of the nozzle part 2; a needle part 3 movable in the flow path 4 of the nozzle part 2 to open and close the flow path 4; a driving part (7, 8, and 9) that drives the needle part 3; and a stopper part (10, 14, and 16) that limits an operation range of the needle part 3. The nozzle part 2 has a tapered section 23 in which an inside diameter of the flow path 4 of the nozzle part 2 relative to an operation range of a tip end of the needle part 3 decreases toward the tip end opening 22. In addition, a stopper position adjusting part (10a, 16a, 13, 12, and 18) that adjusts a stop position defined by the stopper part is also provided. According to a method of the present invention, discharge pressure of the mixture discharged from the tip end opening of the nozzle part is adjusted to be pressure within the pressure range of 4 MPa to 15 MPa, by adjusting the position of the stopper part with the stopper position adjusting part.