DISPENSING MODULE, APPLICATOR HEAD AND NOZZLE HOLDER FOR DISPENSING A FLUID, IN PARTICULAR HOT-MELT ADHESIVE

摘要

The invention relates to a dispensing module (1) for an applicator head for dispensing a fluid, in particular hot-melt adhesive, comprising a module housing (5), a valve body accommodated in the module housing (5), an adapter (7) through which the valve body extends, comprising a proximal end (49) and a distal end (41), the distal end (41) being connected by means of a screw connection (51) to the module housing (5), a nozzle holder (9) which is adapted to be inserted into a matching recess in a base member of the applicator head, and one or a plurality of sealing elements (57, 59, 61) for sealing the nozzle holder (9) and the base member against each other in a fluid-tight manner. According to the invention, it is proposed that the nozzle holder (9) comprises a cavity (69) through which the valve body extends, is connected by means of a screw connection (51) to the proximal end (49) of the adapter (7), comprises a valve seat (79) which is adapted to cooperate with a valve head (31) of the valve body, and comprises an elongate section (75) upstream from the valve seat (79), within which the cavity (69) is limited to a narrow gap (77).

主权项

1. A dispensing module for an applicator head for dispensing a fluid, in particular hot-melt adhesive, comprising
a module housing, a valve body accommodated in the module housing, an adapter through which the valve body extends, comprising a proximal end and a distal end, the distal end being connected by means of a screw connection to the module housing, a nozzle holder which is adapted to be inserted into a matching recess in a base member of the applicator head, and one or a plurality of sealing elements for sealing the nozzle holder and the base member against each other in a fluid-tight manner, wherein the nozzle holder comprises a cavity through which the valve body extends, characterized in that the nozzle holder is connected by means of a screw connection to the proximal end (49) of the adapter, comprises a valve seat which is adapted to cooperate with a valve head of the valve body, wherein the amount of fluid passing between the valve seat and the valve head depends on the pressure drop produced by opening of the valve, and comprises an elongate section upstream from the valve seat, within which the cavity is limited to a narrow gap such that said pressure drop already occurs when said fluid is flowing through said narrow gap.