EP0840698A2

EP0840698A2 - Injection-moulded plastic valve-closing element

Info

Publication number: EP0840698A2
Application number: EP96928383A
Authority: EP
Inventors: Clemens Schumacher
Original assignee: Zeller Plastik Koehn Graebner and Co; Zeller Plastik GmbH
Current assignee: Zeller Plastik Deutschland GmbH
Priority date: 1995-07-27
Filing date: 1996-07-26
Publication date: 1998-05-13
Also published as: MX9800777A; WO1997005033A3; BR9609722A; WO1997005033A2; AU6787596A; CA2227603A1

Abstract

The invention concerns a valve-closing element (V) having a flap (10), a seat (11) and a length of flow line and manufactured by injection-moulded, the flap (10), seat (11) and length of line being integral with each other and the attached flap (10) being designed to rest freely against the seat surface (12) at the zone of greatest radius of motion (R). To ensure reliable operation, the invention proposes that the flap connection (A) is located at a lower level than that of the position of rest on the seat (11) at the zone of greatest radius of motion (R).

Description

Closure orcran made in plastic injection molding

The invention relates to a closure member consisting of a valve flap and a valve seat and manufactured in a plastic injection molding process, with a line section, the valve flap, the valve seat and the line section being formed in one piece with one another, and furthermore the connected valve flap is formed in the area of the largest radius of movement for free support on the valve seat surface.

The range of the largest movement radius can extend to the connection of the valve flap that enables the folding movement. The one-piece manufacture of the closure member, even with line sections going out on both sides, is generally difficult. Although almost all parameters regarding material selection, resilience, shrinkage adhesion etc. are largely taken into account, it is difficult to achieve to achieve the gap-free position of the valve flap, that is to say that the sprayed state of the valve flap in the closed position thereof corresponds to the exact valve seat desired. In addition, demolding is not without influence on the final one

Valve flap position, since when the shaping slide is pulled, a vacuum situation occurs in the mutual environment of the valve flap. Depending on the selected sequence of core pulling, this leads to a gap-forming lifting of the valve flap from its valve seat or to a sucking in of the valve flap in the line section adjoining the valve seat surface. This can go as far as jamming clinging. One like the other means committee, before especially if attention has to be paid to the viscosity of the liquid to be dispensed.

The object of the invention is to remedy this and to make a closure member produced by the plastic injection molding process more reliable.

This object is achieved by the invention specified in the claims.

10

As a result of such a configuration, a generic closure member with increased functional reliability is achieved. The spraying imponderables are eliminated with simple means. Without the free circulation on the

Losing 15 valve seat surface is also effectively avoided that the valve flap gets stuck in the line section adjoining the valve seat. This is achieved with simple means in that the connection of the valve flap is deepened compared to the support on the valve seat in the area of the greatest movement radius. The relevant line section itself forms an effective barrier. In other words: the arm length of the valve flap is greater than the clear hollow cross section of the line section.

25 The valve flap can no longer immerse beyond the valve seat surface; a thought swiveling goes into the material. If, on the other hand, the shaping releases are to be carried out primarily in the opposite direction, the corresponding positional securing of the valve flap is left

30 cause in a simple manner that the valve flap has on its side facing the valve seat a recess having an undercut. The correspondingly designed end of the other slide can be inserted into this undercut like a mushroom head

• Immerse _a c injection mold. The latter stops over the cut the valve flap into position. The pot shape achieved in this way also has a stabilizing effect on the valve flap itself. Even the subsequent removal of the slide from the recess does not lead to a pinching of the

Valve flap. The invention further suggests that the line section has an essentially circular cross section and that the valve seat surface is formed in a plane which includes an acute angle with a central axis of the line section. Viewed perpendicularly to the valve seat surface, this leads to an elliptical edge contour of the line section with a naturally corresponding counter-contour of the periphery of the valve flap. It is also provided that the valve flap is molded onto the valve seat via two material bridges. This stabilizes the direction of folding, thus avoiding transverse displacement of the valve flap. In addition, a snap effect is excluded; the restoring force of the material can act unimpeded in the sense of the closure of the closure member. Specifically, with regard to the addressed connection of the valve flap, the procedure is such that a connecting line of the material bridges with respect to the valve flap runs as a secant. In this way, a double-armed valve flap with clearance is also created in the area of the periphery of the shorter arm. It is also favorable that the line section extends at both ends of the valve flap. The free line section acts to protect the flap.

The invention further relates to a method for producing a closure member in the plastic injection molding process, with a valve flap, a valve seat and a line section, the valve flap and the valve seat being made in one piece via a connecting material bridge be sprayed, further working on both sides of the valve flap with slides, it being advantageous according to the invention that a slide arranged on the valve seat side with the valve flap is more strongly arrested with the valve flap than the oppositely pressing slide and that withdrawal of the valve flap more strongly arrested slider is carried out by resting the valve flap on a stop surface. This can be the barrier preventing the valve flap from being immersed. On the other hand, it is advantageous if the stronger attachment is achieved by means of a clamp holder, that is to say in the sense of the undercut explained above. In addition, it is procedurally advantageous that the demolding of the valve flap takes place in such a way that there is essentially no movement of the valve flap, so that the sprayed state of the valve flap corresponds to the closed position and the "freezing" of the macromolecules essentially takes place in this closed position.

In a further development it is proposed that the valve flap opens towards the interior of the closure member against a discharge direction of the medium predetermined on the closure member. A valve flap which acts in this way can advantageously be used for rapid, reliable pressure compensation. Such closure members are preferably used, for example, on spray dispensers if their liquid substance to be dispensed has a viscosity that leaves the liquid region to an even higher viscosity (eg oven cleaner), in which case the air balance via the outlet openings is otherwise too hesitant or would not set enough.

The invention also expediently relates to a closure member produced in the plastic injection molding process a domed cover, in which a plurality of outlet openings are formed, with an outlet direction, which outlet openings enclose an acute angle with a main direction of the closure member, it being advantageous according to the invention that when the closure cover is formed in one piece with a Closure wall, the outlet openings have a channel-like cross section which is practically constant over a substantial length. It is an outlet opening that has a jet-forming effect. Via the arched course of the sealing cover, the outlet openings can form a beam which widens outwards and is oriented practically towards a conical surface (like a watering can screen head). An embodiment has the effect that the ejection openings are composed of two sections which are different in cross-section but essentially the same over the length, the smaller section being arranged on the outside. Accordingly, a kind of antechamber of larger volume is created on the inside, to which the spray nozzle of the other section, reduced in cross-section, expediently adjoins concentrically. De-molding can be done purely axially, despite the orientation-giving inclination of the channel-forming molded parts. The undercut areas that were briefly displaced are spontaneously and cleanly found, as was found. In addition, it is advantageous that a transition of the closure cover into the closure wall is of reduced thickness in relation to the thickness of the closure cover. It is further proposed that a mouth for extending the channel-like outlet openings is formed on the outside of the bend of the breech cover, while raising it above the outside of the breech cover. The corresponding accumulation of material also leads to a stabilization of the surroundings of such channel-like outlet openings.

The invention further relates to a method for producing a closure member with a curved closure cover, in which a plurality of outlet openings are formed with an outlet direction, which outlet openings form an acute angle with a main direction of the closure member, it being advantageous according to the invention that the closure cover is turned inside out from an essentially concave shape in the injection position into an essentially convex shape in the position of use. Axial removal from the mold is also possible here, but the desired inclination of the channel-like outlet openings now arises from the aforementioned inversion, so that a radiation cone can also be built up in the case of closure members produced in this way. The position of use is stable due to an over-dead-center effect. On a closure blanket with a preferably centrally arranged air compensation opening or media passage opening, formed on an opening wall of the closure blanket, it proves to be advantageous that the opening wall is connected to the opening wall via a transition that is thinner in relation to the thickness of the closure blanket. Thus there is a rotationally symmetrical circumferential hinge effect which facilitates the everting process. Finally, another advantageous feature of the invention is that the closure cover is designed with such a thickness and elasticity that when turned inside out there is a curvature contour composed of a concave and a convex area. This also leads to a favorable jet formation without any other directional shaping effort.

The subject matter of the invention is explained below with reference to illustrative exemplary embodiments. It shows:

1 the closure element according to the invention in a bristle attachment of a container containing a treatment liquid, partially cut, according to the first exemplary embodiment,

2 shows the closure member in individual representation with the projection surfaces drawn in,

3 shows the closure member in a considerably enlarged representation, on average,

4 incorporates the closure member into a pouring spout attachment, which is assigned to the mouth of a bottle as a container in a bouncing manner, according to the second exemplary embodiment,

5 this closure member again in individual representation with the projection surfaces of the valve flap and valve seat, which facilitate understanding,

6 shows a half section through a closure element, realized on a spray head designed as an insert of a container with a resilient wall, forming a valve-controlled air compensation opening, as a third exemplary embodiment, 7 is a top view of this,

8 shows the section in the area of a jet-forming outlet opening, in the spray position, enlarged,

9 the same in the position of use demolding position, also enlarged,

10 shows a variant of the closure member according to FIG. 6,

11 shows the closure member in individual representation with the projection surfaces drawn in (in the last instance corresponding approximately to FIG. 2),

12 shows the spray head designed as an insert in half section with the curvature structure brought into the position of use by turning its closure cover over, as a fourth exemplary embodiment,

13 the same in the demolding position, before being turned inside out,

14 shows a variant of the curvature contour of the closure cover,

15 shows an outlet opening with a mouth formed on the outside and

16 shows a last embodiment of the closure member, forming both an air compensation opening and a media outlet opening in a valve-controlled manner, representing a fifth exemplary embodiment. The container 1 according to FIG. 1, which contains, for example, a textile cleaning agent, shoe cream or similar spreading agent, consists of plastic and can be compressed to dispense the corresponding treatment liquid. There is a kind of tube. For the spreading of the medium, a bristle-like spreading body 2 serves as a top end of this dispenser. The corresponding bristle attachment 3 is assigned to the mouth 4 of the container 1. The whole is covered by a screwable protective cap 5. The latter is connected to the neck 6 of the container taking into account the originality and child safety that is common today.

In the application shown in FIG. 4, the neck 6 of the container 1 carries a pouring spout attachment 7. Also in this second exemplary embodiment there is a protective cap 5, which is, however, implemented as a hinged lid hinged peripherally.

Both protective caps 5 have a stopper 9 on the inside. The plug closes tightly into a line section containing a closure member V, through which the treatment liquid is applied. The functional part of the closure member V controlling this flow path is a check valve.

The closure member V consists of a valve flap 10 and a stationary valve seat 11. The side of the valve seat 11 facing the valve flap 10 forms a valve seat surface 12.

The valve flap 10 is integrally connected to the valve seat 11. This takes place in the plastic injection molding process. The articulation of the joints is used Plastic material allowing valve flap 10 and also having a sufficient restoring force in the closing direction, such as PP, LDPE-PP.

The line section mentioned, which is integral with the valve flap 10 and the valve seat 11, extends at least on the output side, but preferably on both sides of the closure member V, so that with vertical alignment a line section a is implemented at the top and a line section b below, the whole either in one piece with the bristle attachment 3 or the pouring spout attachment 7.

The valve flap 10 is located in a larger cross-sectional area of the line section, so that, in addition to the corresponding injection molding requirement, there is also a sufficiently large swivel clearance for the valve flap 10. In this respect, it is also favorable that the valve flap 10 tapers significantly in the peripheral direction toward the outside. It is practically a conical plate.

The connection A is made in such a way that the valve flap 10 is designed in the region of the largest movement radius R for free support on the valve seat surface 12. It is an essentially gap-free, sealing overlay. The valve seat 11 is embodied on a perforated transverse wall of the line section a, b, the opening being the line section denoted by b.

The movement connection A of the valve flap 10 determines the movement radius. Said connection A is arranged in a recessed manner relative to the region of the largest movement radius R (see FIG. 3). The depth is indicated by T ben and corresponds to about half the length of the longer valve arm of the valve flap 10. The corresponding hinge formation takes place, as can be seen from the overall exemplary embodiment shown, over two material bridges 13. These lie, designed in the manner of spherical segments and projecting somewhat into the lower line section b, between valve flap 10 and valve seat surface 12 of the valve seat 11. They (13) extend on a secant xx of the valve flap 10, which is circular in the left-hand projection surface of FIG. 2, and is circumferentially spaced from one another in a quarter circle. A connecting line L of the material bridges 13 shown in FIGS. 2 and 5 illustrates the position of the secant xx. The clearly eccentrically lying secant xx, which at the same time defines the geometric folding axis, leads to a longer arm I, including the largest movement radius R, and to a significantly smaller arm II on the valve flap 10. When the valve flap 10 is opened, its blade-like edge dips from the valve seat surface 12, which also sharpens at an acute angle, into the interior of the lower guide section b without hindrance. In return, however, it is not possible for the longer arm I to plunge further in the direction of the lower line section b via the zone of the valve seat surface 12 that falls towards it. This is prevented by a blocking wall zone 14 of the lower line section b. The lower connection A mentioned is responsible for this. The free end of the valve flap 10, on the other hand, rises, ie pointing in the direction of discharge of the medium. The line section a / b has a substantially circular cross section (see FIGS. 2 and 5). In contrast, the valve seat surface 12 is formed in a plane EE, which forms an acute angle alpha with a central axis yy of the elongated line section a / b. closes (see Fig. 3). The angle alpha is approximately 60 degrees.

A projection perpendicular to the valve seat surface 12 or the practically gap-free edge of the valve flap 10 has an elliptical outline (see FIGS. 2 and 5). This results in a greater length in the pivoting plane of the valve flap 10 than the clear diameter D of the lower line section b. The plane corresponding to the folding plane is identical to the longer ellipse axis z-z of the valve flap 10 (see FIGS. 2 and 5). The shorter elliptical axis z ', z' of the valve flap 10 corresponds to said diameter D.

When the slide of the plastic injection device forming the underside of the valve flap 10, etc. is withdrawn, the vacuum situation which occurs here is not able to "slide" the valve flap 10 into the lower line section b, which is caused by the demolding. Rather, the valve flap 10 is optimally supported.

When the upper slide forming the upper side of the valve flap 10, etc. is withdrawn accordingly, there is no change in the position of the freshly formed valve flap 10. In this regard, the procedure is such that the valve flap 10 has an undercut 15 on its side facing the valve seat 11. The latter is located in a recess 16 in the central region of the cup flap body which is inclined in this way. The circumferential undercut has a flank angle of approximately 3 degrees. Undercut 15 plus recess 16 are the impression of the lower slide of the plastic spraying device which has a corresponding projection. The valve flap 10 thus holds on to the lower, still standing slide when the upper slide moves upward. The interlocking of the projection and the valve flap 10 can be removed by deliberately pulling off the lower slide, the support explained reaching through the wall zone 14. 0

The method for producing such a closure member V in the plastic injection molding process, with a valve flap 10, a valve seat 11 and a line section a, b, the valve flap 10 and the valve seat 5 being connected via a connecting material bridge 13 are injected in pieces and the valve flap 10 is operated on both sides with sliders (not shown), so that a valve flap on the valve flap side is reinforced with the valve flap 10 0 with respect to the oppositely pressing slide Valve flap is arrested and that the more strongly arrested slide is pulled back by resting the valve flap 10 on a stop surface. This can also be a cross-sectional

25 act as a small, central mandrel that can be pulled off the valve flap 10 easily after pulling the corresponding slide, that is to say after the vacuum situation has ceased to exist, because of its small area. In the opposite direction, the method described would come

30 liability by means of a clamping bracket for carrying, ie using the undercut 15. In any case, however, the adjustment is such that the demolding of the valve flap 10 takes place in such a way that there is essentially no movement of the valve flap 10, so that • _ac the spraying state of the valve flap 10 of the closure part * lung corresponds and the "freezing" of the macromolecules takes place essentially in this closed position.

The bristle attachment 3 is troughed. The upper line section a connects at a central, deepest point. The bristles 17 are surrounded by an annular wall 18. This extends approximately to half the bristle height and forms a pot which, for example in the tilt / use position, retains any excess treatment liquid. Resetting the collapsible wall of the container 1 has a closing effect on the valve flap 10 for a while. The terms "above" and "below" refer to the dispenser in the standing position.

The valve member V according to the third and fourth exemplary embodiment shows the valve flap 10 not in connection with a media outlet opening, but rather an air compensation opening LA. The folding movement accordingly does not occur in the direction of discharge arrow 19, but in the direction of the container 1.

With regard to the aforementioned container 1, this is a so-called squeeze container with at least partially collapsible, resilient wall. The medium is loaded via this so that, for example, it passes through a plurality of outlet openings 20, essentially in the direction of application arrow 19, in a spray bundle. The latter are correspondingly beam-forming or -forming and in their clear cross-section they are considerably smaller than the line section bringing the air equalization, in FIG. 6 only realized as the upper line section a. Correspondingly, the problem of rapid air balancing, which is frequently observed in spray dispensers, is removed, which is particularly evident when the liquid to be dispensed has a relatively high viscosity. On the other hand, a practically sieve-forming distribution of cross-sectionally smaller outlet openings 20, which brings about a spray cone, is useful in itself. The medium is applied as a multi-jet spray cone.

As the variant according to FIG. 10 illustrates, the closure member V can also be extended in a tube-like manner with respect to its line section, beyond the valve seat surface 12, so that a lower line section b is also present here. Thus there is an annular, exposed protective wall with respect to the valve flap 10, even in the open position.

With regard to the valve flap 10 opening towards the inside of the closure member V, the same design features as for the previous two exemplary embodiments apply. The reference numbers are transferred accordingly, that is to say they can be read.

The closure member V according to the third and fourth exemplary embodiments is implemented as an insert 21. It sits in the opening of the neck 6 of the container 1. The plug-in part is formed by an outer wall 22. This merges via an annular base 23 lying on the reservoir side into a free-standing closure wall 24 which is parallel to the space and runs concentrically to the outer wall 22. The walls are circular.

The closure wall 24 carries a closure cover 25.

It is arched. It is a dome-like or spherical section-like curvature. Its center is occupied by the air equalization opening LA mentioned. The outlet openings 20 are distributed around them. Their exit direction arrow 26 extends at an acute angle beta to a main direction, roughly corresponding to the application direction arrow 19 in FIG. 6 or the central axis yy of the elongated line section a or a / b.

A total of eight outlet openings 20 which form an oblique jet are realized. Eε is referred to Figure 7. There, the outlet openings 20 are well distributed over two imaginary circles K 1 and K 2. Kl is the inner circle. Its four outlet openings 20 lie on the bisector of the four outlet openings 20 of the outer circle K2. It is also possible to provide outlet openings 20 which go beyond the number mentioned.

All of the outlet openings 20 extend essentially by the shortest route between the outside and the inside of the arched closure ceiling 25. A beam-forming effect is advantageous if the outlet openings 20 form a channel-like cross section that is practically constant over a substantial length. This can be done via appropriately inclined core pins which can be moved in the exit direction arrow 26. A more pronounced inclination of the outlet openings 20, on the other hand, leads to an even greater channel length thereof.

A significantly simpler form results from FIGS. 8 and 9. There, the outlet openings 20 are composed of two sections 20 ′ and 20 ″ having different cross sections. The cross-sectional jump 20 '''lies in the middle of the thickness of the closure cover 25. The sections ε coincide with the direction of exit arrow 26 on their the length in cross-section is essentially constant. Shaping are an upper mold core 27 and a lower mold core 28. The section 20 'with the smaller diameter faces the outside of the closure cover 25. The coaxially connected

Abεchnitte ^20, 20 ¹ 'εind zylindriεch gene and the Abformun- or marks corresponding cylindrically shaped Kernstiftabεchnitte 28' and 28 '' deε lower mandrel 28. The upper mold core 27 follows the curvature of the comparison circuit 0 ceiling 25. The Formkere 27.28 are axially moved in the opposite direction to each other to release the molding, specifically in the central axis yy. First the upper one is drawn; A certain solidification of the spraying mass already arises. The undercut situation given due to the inclination of the axes of the core pin sections 28 ', 28' ^{1 is} acceptable, since the corresponding wall parts spontaneously re-enter the channel-forming impressions after the core pin sections 28 ', 28 ^{1 1} emerge reset the molded basic setting. Affected are only an upper, in cross-section wedge-shaped sickle piece 29 and a lower, in cross-section also wedge-shaped sickle piece 30 on the downward side of the closure cover 25. The desired beam-forming structure remains

25 obtained, at the same time with the advantage of forming an antechamber located on the closure side in the form of the section 20 ″ of the outlet openings 20 as a preparation space.

30 The peripheral outlet openings 20, which lie on the outer circle K2, assume an inclined position slightly beyond the angle Beta. Beta includes an angle of approximately 25 degrees to the central axis yy, the appropriate axial alignment of the outer _ _ς Austrittεöffnungen 20 is approximately 35 degrees. As can be seen from the drawings, the closure wall 24 continues beyond the spherically curved closure cover 25 as a free ring wall. In terms of height, it extends beyond the zenith and merges from there into a funnel-shaped lip 31. This is placed in such a way that it does not interfere with the jacket of the spray cone, which is determined by the outer outlet openings 20. A spot-like application can be achieved by strongly approaching or even placing the lip 31 on the target location.

The fourth exemplary embodiment shows a similar insert 21, in which, however, the spray position according to FIG. 13 is different with regard to the course of the closure cover 25 than the finished use position of the closure member V shown in FIG. 12. The closure member also produced here by injection molding, that is to say the entire insert 21 is produced in such a way that, starting from an essentially concave shape in the spray position, the closure cover 25 is turned inside out in an essentially convex shape in the position of use. In this embodiment example, undivided core pins can be used, ie the core pin can extend continuously from the upper molded part 27 or the lower molded part 28, namely axially parallel to the central axis yy. Reference is made to FIG. 13. After the closing cover 25, which is then curved as shown in FIG. 6, has been turned in the opposite direction, the central axes (exit direction arrow 26) of the outlet openings 20 likewise take an acute angle beta to the main direction of the delivery direction arrow 19, represented by arrow 26. Here, too, there is an approximately the same angle Beta with a correspondingly greater convergence of the outlet openings 20 in the outer circle K2. The reference numbers are also used here analogously.

The position of use is also securely maintained, since the curvature surface of the closure cover 25 is larger than the clear diameter or. inner cross section of the insert 21, circumscribed by the closure wall 24. A dead center plane formed by the rotationally symmetrical connection zone is thus exceeded. This is not only defined by the corresponding connection, but also designed to act as a hinge in a favorable manner. This looks structurally such that an outer transition 32 of the closure cover 25 into the closure wall 24 is of reduced thickness in relation to the thickness of the closure cover 25. Said transition 32 is reached due to an upper-side annular groove 33 and an underside annular groove 34 of the closure blanket 25. Thus, the material is partially thinned from both sides to approximately half the thickness of the closure blanket 25. This can, however, depend on the material be different.

The degree of curvature in FIG. 12 is shown somewhat exaggerated for the sake of clarity of the inversion. The valve formed in the center is not adversely affected during the inversion process. This applies both with regard to the valve flap 10 and the valve seat surface 12 or the valve seat 11 realized on the connection-like line section and the connection A. Here, too, there is a material-reduced, inner transition 35 between the inner region of the closure cover 25 and the connection-forming part Opening wall 36 of line section a is taken into account, again by an upper and lower annular groove 37 and 38 respectively. FIG. 14 shows a variant of the peripheral connection zone of the transition 32 there. It consists in that the closure cover 25 is equipped with such a thickness and elasticity that when turned inside out there is a concave and a convex region 25 ′ or 25 '' composite curvature contour results. The outer region, designated 25 ', is the concave. In order to obtain the corresponding stiffness on the upper side for the stronger holding down of this edge zone, the transition 32 is only grooved on the underside. The notch-like ring groove here bears the reference number 39. The remaining ring grooves are U-shaped bounded grooves. The inner area 25 '' is higher. Overall, there is a corrugated membrane-like, rotationally symmetrical, raised dome in the center. The channel-forming outlet openings 20 cross the sealing cover 25 here at a slight slant, and are therefore extended.

FIG. 15 shows a measure which promotes jet formation with regard to the stepped and untufted outlet openings 20. The unstaged one is illustrated as an example. The measure consists in that an opening 40 is formed on the bend side of the closure cover 25. This additionally extends the channel-like outlet openings 20 by raising them above the outside of the closure cover 25. The outer edge of the mouth 40 slopes down at an angle in a rotationally symmetrical manner. It is lip-like.

FIG. 16 shows a possibility of simultaneously fitting the closure member V on an insert 21 with an air compensation opening LA and also providing a media outlet opening, here formed by the line section a / b explained in detail. The valve flap 10 of the first-mentioned device opens inwards, thus in the direction of the container 1; the valve flap 10 of the other device opens outwards, that is to say in the direction of application arrow 19. Both parts are in the center of the relevant insert 21. In addition to a, no further outlet openings need to be arranged.

With regard to insert 21, it should also be mentioned that its outer wall 22 merges at the top into an outwardly directed annular flange 22 ', which lies supported on the free, flat end edge 6' of neck 6. In order to facilitate the plug-in assignment, an outside chamfer 41 is also carried out on the transition area between said wall 22 and the subsequent ring base 23.

All the features disclosed are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also included in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims

Expectations

1. From a valve flap (10) and a valve seat (11) consisting of a plastic injection molded closure member (V) with a line section, the valve flap (10), the valve seat

(11) and the line section are formed integrally with one another, and the connected valve flap (10) in the area of the largest movement radius (R) for free support on the valve seat surface

(12) is formed, characterized in that the connection (A) of the valve flap (10) is recessed in relation to the support on the valve seat (11) in the region of the greatest movement radius (R).

2. Closure member according to claim 1 or in particular, characterized in that the valve flap

(10) has on its side facing the valve seat (11) a recess (16) with an undercut (15).

3. Closure member according to one or more of the preceding claims or in particular according thereto, characterized in that the line section (a, b) has a substantially circular cross section and that the valve seat surface (12) is formed in one plane (EE) det, which includes an acute angle (alpha) with a central axis (yy) of the line section (a, b).

4. Closure member according to one or more of the preceding claims or in particular according thereto, characterized in that the valve flap (10) is molded onto the valve seat (11) via two material bridges (13).

5. Closure member according to one or more of the preceding claims or in particular according thereto, characterized in that a connecting line (L) of the material bridges (13) with respect to the valve flap (10) runs as a secant (x-x).

6. Process for the manufacture of a closure member (V) in the plastic injection molding process, with a valve flap (10) and a valve seat (11) and a line section (a, b), the valve flap (10) and the valve seat (11) having a material bridges (13) connecting them are injection-molded in one piece, further work being carried out on both sides of the valve flap (10) with slides, characterized in that a slide valve arranged on the valve seat side with the valve flap (10) is reinforced with the slide valve (10) opposite the oppositely pressing slide the valve flap (10) is arrested and that the more strongly arrested slide is pulled back with the valve flap (10) resting on a stop surface.

7. The method according to claim 6 or in particular according thereto, characterized in that the stronger arrest is achieved by a clamp.

8. The method according to one or more of the preceding claims 6, 7, characterized in that the removal of the valve flap (10) takes place in such a way that there is essentially no movement of the valve flap (10).

9. Closing member according to one or more of the preceding claims or in particular thereafter, characterized in that the line section extends on both sides of the valve flap (10).

10. Locking member according to one or more of the preceding claims or in particular according thereto, characterized in that the valve flap (10) counter to a direction of delivery (19) of the medium, which is predetermined on the locking member (V), towards the interior of the locking member (V ) opens.

11. The closure member (V) produced by the plastic injection molding process with a curved closure cover

(25), in which a plurality of outlet openings (20) are formed, with an outlet direction (arrow 26), which outlet openings (20) enclose an acute angle (Beta) with a main direction of the closure member (V), characterized in that at one-piece design of the closure cover (25) with a closure wall (24), the outlet openings (20) have a channel-like cross section, which is practically constant over a substantial length.

12. Closure member according to one or more of the preceding claims or in particular according thereto, characterized in that the outlet openings (20) consist of two sections which are different in cross section but essentially constant over the length

(20 ', 20' ') put together, a smaller section (20') being arranged on the outside.

13. Closure member according to one or more of the preceding claims or in particular, characterized in that a transition (32) of the closure cover (25) into the closure wall (24) has a reduced thickness in relation to the thickness of the closure cover (25) ¬ det.

14. Closure member according to one or more of the preceding claims or in particular according thereto, characterized in that the outside of the curvature of the sealing cover (25) has an opening (40) for extending the channel-like outlet openings (20) while raising them above the outside of the Closure blanket (25) is formed.

15. A process for producing a closure member (V) with a curved closure cover (25) in which a plurality of outlet openings (20) are formed with an exit direction (arrow 26), which outlet openings (20) have a main direction of the closure member (V). enclose an acute angle (beta), characterized in that, starting from an essentially concave shape in the spray position, the closure blanket (25) is turned inside out into an essentially convex shape in the distribution of use.

16. Closure member with a closure blanket with a preferably centrally arranged air compensation opening (LA) or media outlet opening, formed on an opening wall (36), characterized in that the opening wall (36) via a reduced-thickness transition with respect to the thickness of the closure blanket (25) ( 35) is connected to the opening wall (36).

17. Closure member according to one or more of the preceding claims or in particular according thereto, characterized in that the closure cover (25) is designed with such a thickness and elasticity that when turned inside out one of the concave and convex areas (25 'and 25 '') composite curvature contour results.