DE1575061B2

DE1575061B2 - Pressure atomizer pack with self-closing valve

Info

Publication number: DE1575061B2
Application number: DE1967S0109352
Authority: DE
Inventors: Hans Ing.(Grad.) 4600 Dortmund Grothoff
Original assignee: Individual
Current assignee: Individual
Priority date: 1967-04-15
Filing date: 1967-04-15
Publication date: 1978-03-16
Also published as: FR1583209A; DE1575061C3; GB1217524A; DE1575061A1

Description

der eine weitere Stelle für Diffusionsverluste bedeutet und die Gewichtsverluste der Zerstäuberpackung praktisch verdoppelt. Weiter ist bei dieser Anordnung der komplizierte und aufwendige Aufbau nachteilig und einer Massenfabrikation abträglich. Gegenüber der erstgenannten Anordnung werden zwei zusätzliche Bauteile — Zwischenstück und Dichtungsring — benötigt, die die Herstellung verteuern, wobei andererseits der höhere Gestehungspreis den Vorteilen nicht entspricht, womit begründet ist, daß dieser Anordnung kein wirtschaftlicher Erfolg zuteil werden konnte.which is another source of diffusion losses and the weight losses of the atomizer pack practically doubled. Furthermore, the complicated and expensive structure is disadvantageous in this arrangement detrimental to mass production. Compared to the first-mentioned arrangement, there are two additional Components - intermediate piece and sealing ring - required, which make the production more expensive, while on the other hand the higher cost price does not correspond to the advantages, which justifies that this arrangement no economic success could be achieved.

Der Erfindung liegt die Aufgabe zugrunde, eine leichte Führung des Ventilgliedes mit geringstmöglichem Reibungswiderstand in der Öffnung des Ventildeckeldoms sicherzustellen und Beschädigungen und '5 Abrieb am Ventilglied durch die Ventildeckeldomöffnung zu vermeiden, die Stanzfläche der Ventildeckeldomöffnung der Korrosionsgefahr durch die Atmosphäre zu entziehen, die Diffusion der Inhaltsstoffe der Zerstäuberpackung durch die Dichtungsscheibe auf ein Minimum zu reduzieren und eine Beschädigungsmöglichkeit der Dichtungsscheibe durch Stanzkanten der Ventildeckeldomöffnung auszuschließen; weiter soll die Anordnung gute strömungstechnische Eigenschaften aufweisen, keine zusätzlichen Bauteile zur Lösung benötigen und in einer Massenfabrikation ohne nennenswerten zusätzlichen Aufwand unter Benutzung der bekannten Hilfsmittel sicher herstellbar sein.The invention is based on the object of an easy guidance of the valve member with the least possible To ensure frictional resistance in the opening of the valve cover dome and damage and '5 To avoid abrasion on the valve member through the valve cover dome opening, the punched surface of the valve cover dome opening to remove the risk of corrosion through the atmosphere, the diffusion of the ingredients of the To reduce the atomizer packing through the sealing washer to a minimum and a possibility of damage exclude the sealing washer by punching the valve cover dome opening; further should the Arrangement have good fluidic properties, no additional components for the solution need and in a mass production without significant additional effort using the known tools can be safely produced.

Die Erfindung löst die Aufgabe dadurch, daß der Rand der Durchtrittsöffnung im Dom des Ventildeckels durch Umbördeln zum Innern des Behälters hin abgerundet ist.The invention solves the problem in that the edge of the passage opening in the dome of the valve cover is rounded by flanging towards the inside of the container.

Die Erfindung ist nachstehend anhand der Zeichnungen von Ausführungsbeispielen erläutert. Es zeigtThe invention is explained below with reference to the drawings of exemplary embodiments. It shows

Fig. 1 einen senkrechten Schnitt durch den Ventildeckel und das Selbstschlußventil einer Druckzerstäuberpackung mit nach innen abgerundetem Rand der Durchtrittsöffnung im Ventildeckeldom,Fig. 1 is a vertical section through the valve cover and the self-closing valve of a pressure atomizer pack with inwardly rounded edge of the passage opening in the valve cover dome,

F i g. 2 einen vergrößerten Ausschnitt nach F i g. 1 undF i g. 2 shows an enlarged section according to FIG. 1 and

Fig.3 einen Ausschnitt ähnlich Fig.2, jedoch mit kegelig nach außen hochgedrücktem Rand der Durchtrittsöffnung. FIG. 3 shows a detail similar to FIG. 2, but with conical outwardly pushed up edge of the passage opening.

In Fig. 1 ist ein Teil einer Druckzerstäuberpackung mit einem Selbstschlußventil dargestellt, wobei die obere Öffnung des nicht dargestellten Behälters durch einen Ventildeckel 1 aus Metall verschlossen ist. In den nach der dem Druckbehälter abgekehrten Seite ausgestülpten Dom 2 sind eine Dichtungsscheibe 3 und ein Ventilgehäuse 4 mit Tauchrohrhalter 5 eingesetzt, die durch eine Krimpung 6 gegen die Unterseite des Ventildeckeldoms dicht verspannt sind durch Andruck des oberen Randes 7 des Ventilgehäuses gegen den Außenrand der Dichtungsscheibe. Eine Druckfeder 8 stützt sich mit dem unteren Ende am Ventilgehäuse und am oberen Ende an einem rohrförmigen, eine öffnung 10 im Ventildeckeldom durchsetzendes Ventilglied 9 unter Vorspannung ab. Das obere Ende des Ventilgliedes dient zur Aufnahme eines Ventilbetätigungs- und Abgabekopfes, der nicht dargestellt ist. Mindestens eine radiale, mit der Axialbohrung 11 des Ventilgliedes verbundene Durchtrittsöffnung 12 ist in Abhängigkeit von der Axialbewegung des Ventilgliedes gegenüber dem Innenraum des Behälters durch die am Ventilglied anliegende Dichtungsscheibe 3 abgedichtet.In Fig. 1 part of a pressure atomizer pack is shown with a self-closing valve, the upper opening of the container, not shown, is closed by a valve cover 1 made of metal. In the after the side facing away from the pressure vessel everted dome 2 are a sealing washer 3 and a valve housing 4 with immersion tube holder 5 used, which by a crimp 6 against the underside of the Valve cover domes are tightly clamped by pressing the upper edge 7 of the valve housing against the Outer edge of the sealing washer. A compression spring 8 is supported with the lower end on the valve housing and at the upper end on a tubular valve member 9 penetrating an opening 10 in the valve cover dome under tension. The upper end of the valve member is used to accommodate a valve actuation and Dispensing head, which is not shown. At least one radial, with the axial bore 11 of the valve member connected passage opening 12 is dependent on the axial movement of the valve member opposite the interior of the container is sealed by the sealing washer 3 resting on the valve member.

Die Dichtungsscheibe greift in eine Ringnut 13 des Ventilgliedes ein und paßt sich im wesentlichen dem Profil der Nut mit einer gewissen Vorspannung an.The sealing washer engages in an annular groove 13 of the valve member and essentially fits the Profile of the groove with a certain preload.

Es ist vorgesehen, daß der Rand 14 der Durchtrittsöffnung 10 im Dom 2 des Ventildeckels 1 durch Umbördeln zum Innern des Behälters hin abgerundet ist.It is provided that the edge 14 of the passage opening 10 in the dome 2 of the valve cover 1 by flanging is rounded towards the inside of the container.

Die Dichtungsscheibe 3 wird durch die Vorspannung der Feder 8 über die Abdichtfläche 15 des Ventilgliedes 9 gegen den nach innen umgelegten Rand 14 des Ventildeckeldoms angedrückt. Dadurch, daß der umgelegte Rand über die umgebende Innenfläche des Ventildeckeldoms übersteht, verstärkt sich die Flächenpressung der Dichtung ringförmig in diesem Bereich. Damit ist eine direkte Diffusion der Inhaltsstoffe der Zerstäuberpackung nur noch zwischen der Unterseite 16 und dem an der Oberseite der Dichtungsscheibe zwischen dem Rand 14 und dem Ventilglied 9 verbleibenden, zur Gesamtfläche der Dichtungsscheibe vergleichsweise kleinen Flächenausschnitt möglich. Der umgelegte Rand 14 bildet auch eine Barriere für die Inhaltsstoffe, die von der Unterseite 16 in den den Rand 14 umgebenden freien Raum 17 durch die Dichtungsscheibe hindurchdiffundiert sind und verringert damit insgesamt die Diffusionsverluste der Zerstäuberpakkung wesentlich. Durch den umgelegten Rand 14 wird außerdem eine Kraft auf die Dichtungsscheibe in Richtung auf die Ringnut 13 des Ventilgliedes hervorgerufen, durch die die Abdichtung in diesem Bereich ebenfalls begünstigt wird.The sealing washer 3 is by the bias of the spring 8 over the sealing surface 15 of the valve member 9 pressed against the inwardly folded edge 14 of the valve cover dome. By the fact that the turned over If the edge protrudes beyond the surrounding inner surface of the valve cover dome, the surface pressure increases the seal ring-shaped in this area. This is a direct diffusion of the ingredients Atomizer pack only between the bottom 16 and that on the top of the sealing washer remaining between the edge 14 and the valve member 9, to the total surface of the sealing washer comparatively small area sections possible. The folded edge 14 also forms a barrier for the Ingredients from the underside 16 into the free space 17 surrounding the edge 14 through the sealing washer are diffused through and thus overall reduces the diffusion losses of the atomizer pack essential. The folded edge 14 also exerts a force on the sealing washer in Direction caused by the annular groove 13 of the valve member, through which the seal in this Area is also favored.

Gemäß F i g. 3 ist der umgelegte Rand 14 nach oben konisch herausgedückt. Die Abrundung der oberen Kante des Randes 14 wird dadurch verstärkt. Pie erhöhte Flächenpressung der Dichtungsscheibe im Bereich des Randes 14 bleibt dabei durch die Bildung des freien Raumes 17 jedoch weitestgehend bestehen. Die ungeschützte Stanzfläche 18 des Randes 14 liegt von außen nicht sichtbar hinter der Abdichtfläche des Randes und ist somit vor Korrosion auslösenden atmosphärischen Einflüssen geschützt. Eine Korrosion durch Diffusionsbestandteile ist ebenfalls nicht möglich, da Wasser nicht durch die verwendeten Dichtungsmaterialien hindurchtreten kann und in dem freien Raum 17 Sauerstoff nicht vorhanden ist.According to FIG. 3, the folded edge 14 is pushed out conically upwards. The rounding of the top Edge of the edge 14 is reinforced. Pie increased surface pressure of the sealing washer in the However, the area of the edge 14 largely remains due to the formation of the free space 17. The unprotected punching surface 18 of the edge 14 is not visible from the outside behind the sealing surface of the Edge and is thus protected from corrosion-inducing atmospheric influences. A corrosion due to diffusion constituents is also not possible, as water cannot penetrate the sealing materials used can pass and in the free space 17 oxygen is not available.

Das Umlegen des Randes 14 der öffnung 10 im Ventildeckeldom wird im Anschluß an das Ausstanzen eines im Durchmesser kleiner als die spätere öffnung bemessenen Loches durchgeführt, wobei es nicht zu Beschädigungen der auf dem Metall befindlichen Zinnoder zusätzlichen Lackschicht kommt. Dagegen werden durch den Stanzvorgang gebildete Stanzgrate an der zur Dichtungsscheibe 3 weisenden Kante der Stanzfläche 18 weggestaucht und die Kante so weit verrundet, daß keine Beschädigungsmöglichkeit für die Dichtungsscheibe gegeben ist.The folding over of the edge 14 of the opening 10 in the valve cover dome is carried out following the punching out a hole with a diameter smaller than the subsequent opening is carried out, whereby it is not closed Damage to the tin or additional paint layer on the metal. Be against it Punching burrs formed by the punching process on the edge of the punching surface facing the sealing washer 3 18 compressed away and the edge rounded so far that there is no possibility of damage to the sealing washer given is.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Claim:

Pressure atomizer pack with self-closing valve, the opening of which is through a valve cover made of metal is closed, in the valve cover dome of which is everted towards the side facing away from the pressure vessel a sealing washer and a valve housing are used, in which the valve cover dome and the Valve housing by deforming the cover dome to against the underside of the valve housing below Intermediate layer of the sealing washer are tightly clamped, in which a tubular, after the The end facing away from the pressure vessel is open and the valve member is spring-loaded in the closing direction, a '5 Opening in the valve cover dome, in which the upper end of the valve member for receiving a Valve actuation and dispensing head is formed and in which at least one radial, with the Axial bore of the valve member connected passage opening depending on the axial movement of the valve member with respect to the interior of the container by the contact with the valve member Sealing washer is sealed, characterized in that the edge (14) of the passage opening (10) in the dome (2) of the valve cover (1) by flanging towards the inside of the container is rounded.

3030th

The invention relates to a pressure atomizer pack with a self-closing valve, the opening of which by a Valve cover made of metal is closed, in which the side facing away from the pressure vessel is turned out Valve cover dome a sealing washer and a valve housing are used, in which the valve cover dome and the valve housing by deforming the cover dome against the underside of the valve housing are tightly clamped with the interposition of the sealing washer, in which a tubular, after the The end remote from the pressure vessel is open and the valve member is spring-loaded in the closing direction and has an opening in the Passed through valve cover dome, in which the upper end of the valve member for receiving a valve actuation and delivery head is formed and in which at least one radial, with the axial bore of the Valve member connected passage opening depending on the axial movement of the valve member sealed against the interior of the container by the sealing washer resting on the valve member is.

A self-closing valve of this type is described with the German patent 8 42 563. In this arrangement, the edges of the edge of the passage opening of the valve cover dome are directed slightly downwards in the direction of the sealing washer. Since the passage opening is produced by punching, the resulting edges are inevitably sharp-edged and have a punched burr on one side. The resulting disadvantages are manifold. So the desired ease of movement of the valve member is not ensured. Rather, during the actuation process there is increased frictional resistance with the possibility of scraping off the plastic material ^{b5 of} the valve member when it is scraped past the punched edges. The punched surface exposed to the atmosphere is unprotected due to the usual manufacture of the valve cover from tinplate and exposed to the risk of corrosion, which can easily spread over the entire valve cover as a result of the infiltration of the tin layer and make the pressure atomizer packaging unsaleable by causing an unsightly appearance. The same applies to the use of these valve covers in body sprays, where the hexachlorophene content of these products can cause a red color spreading over the surface of the valve cover through reaction with the iron on the punching surface. Furthermore, the punched edges are also unfavorable in terms of flow technology with regard to the pressure filling of the atomizer packs with propellant gas, since these lead to a flow separation and the formation of turbulence, whereby the filling speed is adversely affected. Pressure atomizer packs cause a more or less high weight loss of the pack during storage, depending on the contents of the pack, by diffusion of the solvents contained in the pack through the sealing washer arranged in the valve. The aforementioned arrangement initially brings about an improvement at this point due to the downward-facing edge of the edge of the passage opening and the resulting increased surface pressure compared to the sealing washer, but this is canceled again when the punched edge facing the seal gradually becomes due to the sharpness Cuts into sealing washer and continues to damage the sealing washer.

The arrangement made known by the American patent specification 30 11 686 brings compared to the aforementioned state only insofar an improvement with it, as the punched surface of the passage opening through the sealing washer is covered and thus largely protected from corrosion. the However, other aforementioned defects are also present to the same extent in this arrangement, whereby the risk of damage to the sealing washer by the punched edge in this case as a result of the still stronger bending of the edge of the passage opening compared to the first-mentioned arrangement is reinforced.

The arrangement according to the American patent 27 72 820 is in contrast to the aforementioned arrangements This is an improvement in that the punching surface and the punching edges of the opening of the The valve cover is covered by an additional metal spacer that is rounded on both sides with which the disadvantages of the previous ones caused by the sharpness of the punched edges Arrangements in this arrangement are not given. The susceptibility to corrosion is with this solution however, it is reinforced by the fact that in addition to the unprotected ones in contact with the atmosphere Punched surfaces of the valve cover opening and of the intermediate piece resting on the valve cover outer surface there is a cavity between the intermediate piece and the outer surface of the valve cover, in which in particular When testing the water bath, water can penetrate the filled pressure atomizer, whereby the cavity offers particularly ideal corrosion conditions. In terms of tightness, the arrangement is as to be disadvantageous. The sealing washer experiences through the lower rounding of the intermediate piece a ring-shaped increased surface pressure, but is for sealing between the intermediate piece and the Valve cover an additional sealing ring is provided,