Self-closing membrane valve

Self-closing diaphragm valve (V) with a slit diaphragm (1) and a dome-like securing part (2) associated with a mounting region (6) of the diaphragm (1), wherein the securing part (2) is connected in a positively locking or integral manner to the diaphragm (1) and has a configuration enabling securement in a closure part (7) by latching or over-engagement on the outer periphery of the circumference.

Closure (8) which is produced by plastic injection molding and is intended for a dispensing container, including a blow-molded bottle, the closure (8) having a self-closing diaphragm valve (V) which interacts with a securing part (2), wherein the diaphragm (1), which is of dome-like configuration even in a free-span region, is connected in a positively locking or integral manner to the securing part (2), the securing part (2) being secured in the closure (8) by latching.

Closure according to claim 16, wherein the closure part (7), which encircles the securing part (2) on the outside, acts on the diaphragm (1), at the same time, in the manner of a cutting edge in the region of overlap with the securing part (2).

Process for producing a self-closing diaphragm valve (V) with fitting of a diaphragm (1) in an annular securing part (2), the diaphragm (1) consisting of an elastomer, wherein a securing part (2) is produced by plastic injection molding, and the elastomer material (59) is then added in a fluid state to the securing part (2) accommodated in a mold (60) and, with the aid of a counter-mold (63), the elastomer material (59) is distributed in order to form the diaphragm as desired.

Self-closing diaphragm valve (V) which is accommodated in an annular securing part (2), produced by plastic injection molding, and has a diaphragm (1) made of an elastomer material (59) with a slit (4) for forming a dispensing opening when acted upon by pressure, wherein the diaphragm (1), when formed in a manner in which it is free of cut edges on its circumferential periphery (58), is connected in a positively locking and/or integral manner to the securing part (2).