DE1952458A1 - Valve part for aerosol container and device for its manufacture - Google Patents

Description

Valve part for aerosol container and device for its manufacture.

Me jirfindun-u- refers to valves and concerns in particular valves for reducing the delivery of one in one Container pressurized product, such as z.ü. are packed in i) 'o :: - n so-called aerosols!

-on the 'J-e'bist of the Asroscl technique this is converted into a st:' - c ^v , u. vnfrni; e rorm. ^ ebraerrce produce-placed in a container under ^ ruc'c, the pressure required being ζ.ή. by as Yi.rd ^ rrr.f an.7 "of an otoff s with a low boiling point o'l-iv ü.uj? ch a compressed gas or by a Konb: '-: ·. ·;.!; ! ·: ·· -! -Ixosor 'jsiacn Ld ^ licriiceiten is evoked.

: Containers under pressure are marked with a V "

ti.>. ν .r-

en

w.! se

s makes it possible to use the ürzenuanis on a regular basis ^ in such a verxtil must be trained

be. ··, d.:.: .. it tightly closes the ü3L rtsr suv ^ and o-.s oj .. c / ff. c'oen c.gg ^ L-zeu ^ nisses about · the valve sv / i see üu:.: oj_ij .-. nc \ --r fol;.: t.iic.eu ^ .bgabevorgingen prevents uii this « o.:<=.:v-,ji- ■ a Lu onuourochen, .include the so far known- ■ j \ n .a.:. -.OKOiV-XItI.-e me'irex -.- j components including one

009818/1270

BATH ORIGINAL

1952 * 58

A separate spring is used to keep the controllable flow path of the valve normally closed. These components have to be manufactured separately ² and then assembled to form a complete valve, and the amount of time required to manufacture and assemble the various parts has a decisive influence on the cost of the valves and thus also on the selling price of the product under pressure.

According to the invention, a Jierosolver.üii be created, which, in comparison to known ilonstruc- operations includes a smaller number of parts to be manufactured separately and then assembled, and besides lerr; sees the üirfindun «pre-call dunking for the creation of one Valve forward «

According to one of its iv-erfcnale the Erfir.:lu.r. _; j a valve part, which is a single U ¹ C rm piece that delimits a .btrömungsweg, and in which a cavity a section; of the S'ormstucks, wherein an annular sealing member can normally be held in such a position that it rests against the portion mentioned to keep the Ötrömüngsiveg closed; a spring is also provided which also forms a solid rsestandteilteil or .abschnitt the iOrmstücks, normally holds the sealing part in contact with the mentioned portion and allows a relative movement between the annular ..uichtungteil and said portion, so that the _{; ::;} Flow path can be opened.

According to a second feature, the invention provides injection mold suitable for processing a thermoplastic material or »a tool for manufacturing the inventive valve part before; this tool includes several components made of ketall, which are inside the tool delimit a cavity and comprise iieiles which protrude into the cavity which includes the outer shape of the valve member determine the external shape of the spring section;

U09818 / 1270

ORIGINAL BATHROOM

Further, the mentioned Ieile define the shape of the outlet channel of the valve member, an annular cavity within the valve member for _receiving% of the annular seal member, the inner shape of a part of the tfand of the cavity forming the spring section as well as the shape of a channel that is one of the Auslaikanal by Extends portion of the valve part, which is surrounded by the annular cavity, and which leads to an opening which opens at a surface of the mentioned portion in the annular cavity.

The contiguous shaped stick according to the invention comprises several sections, namely a first annular one Section by means of which the fitting or valve part can be installed in a container with a sealing effect can, a second portion delimiting an outlet channel, an annular forming said spring, the first Section with the second section connecting third section as well as a fourth .section, which extends from the second section extends out into the space within the first section and the spring section and with a channel is provided connecting the outlet channel to an opening in a surface of the fourth section, wherein the second section together with the fourth section opposite the first section against the spring force of the FederabsOhnitts is movable. The annular sealing part must be held between the first and the fourth section so that there is normally the opening mentioned tightly closed, and the arrangement is such that the aforementioned relative movement to a relative movement between the annular sealing part and the fourth section, so that the opening is exposed. Preferably the radially inwardly directed surface of the ring-shaped sealing part serves to close the cffnu-ig light to keep.

U09818 / 127Q

BATH ORIGINAL

1992499

'. The first section preferably comprises an approach to which a dip tube can be attached, which either encloses the approach or is inserted into it «This approach forms the inlet channel of the valve.

It should be particularly noted that the extending through the valve member controllable channel apart from the inlet and the outlet has no connection with the outer surface of the integral molding. This is in contrast to the valves known up to now, which are composed of several parts, whereby the connection points between the parts may form leakage paths which, in certain areas between the inlet and the outlet of the valve, connect the controllable flow channel of the valve to the outer surface of the valve can form. The avoidance of such leak paths results according to the invention in particular from the use of a single molded piece and from the need to use only one additional component, namely the annular sealing part, which is enclosed by the molded piece and not attached to it, so that it forms part of the outer surface of the valve. The sealing between the valve and the container therefore only serves to prevent the contents from escaping from the main body of the container and therefore does not also serve to prevent the escape of the product via the dip tube or the inlet of the valve.

When between the annular sealing part and brought about the portion of the fitting enclosed by it Relative movement can be a sliding movement and / or act an expansion movement. If a sliding movement is provided, the annular sealing part be essentially rigid, while the fitting is expediently made of rubber. In the other case mentioned is the sealing part, on the other hand, is preferably elastic, or it consists of an elastomer material.

BATH ORIGINAL

009818/1270

1952459

With regard to the expansion movement mentioned, it should be noted that the enclosed by the annular sealing part Section of the molded piece can have a shoulder or the like, on which the sealing part or the sealing ring can support, so that the aforementioned relative movement when using an elastic sealing ring to such a deformation of the sealing ring causes its radially inwardly directed surface to widen or of the adjacent surface of the section of the molding enclosed by it is "unrolled"

The sealing ring can be a simple circular seal, which preferably, but not necessarily, consists of an elastic material or an elastomer material, for example rubber or "EVA". It is even possible to use the seal as an end section of the Train immersion tube. It may be advantageous to give the outer surface of the seal a conical shape so that the sealing part cooperates with an interference fit with the wall of the cavity in the fitting. In addition, the seal can be held in place on a seat formed by an inner shoulder of the fitting. In any event, the seal is preferably given external dimensions which are larger than the internal dimensions of the cavity it receives, so that the seal is compressed and held in the desired position in the cavity in order to reliably close the channel of the valve. If such a seat is formed on the molded piece, it can be formed by a projection on the outer or inner surface of the cavity receiving the seal. Another way to keep the seal in place would be to insert a dip tube so into an inlet port of the valve. to be installed so that the end of the smoke pipe is supported on the seal. The immersion tube can be firmly connected to the fitting, for example by welding.

Furthermore, in the sealing zone of the valve, i.e. in the sealing surface of the sealing ring and / or in * EVA = Abbreviation for ethylene vinyl acetate

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BATH ORIGINAL

the sealing surface of the fitting, form a hat, so that the pressure prevailing in the container acts on the inner surface of the spring section, which then has the task of a The membrane takes over, through which the spring action is supported .wird.

Furthermore, the fourth section can have a plurality of openings on its outside, which along the axis of the fourth section open at different levels, so that a single opening are used for dispensing the product while all of the openings can be used to allow the container to be filled quickly.

Regarding the mode of operation of the valve, above of relative axial movements between the sealing part and the portion of the jamb piece that is enclosed by it spoken. In addition, however, the valve can also be actuated by a relative tilting movement. Assuming that there is only one opening, which is normally kept closed by an elastic sealing ring, only causes tilting within a limited range of directions that the valve is opened. To avoid this disadvantage, one can Provide a groove that extends over the entire circumference or at least most of the circumference of the sealing zone extends and in communication with the channel of the sealing part enclosed portion of the fitting is. This groove can be in the sealing part and / or that of it Enclosed section will be formed · Will have a tilting motion brought about practically in any sighting, this groove is opened so that there is an open delivery channel extends through the valve /

The outer surface of the molding can be any suitable Obtained a shape that enables the molded piece, for example, by a flanging process with a sealing effect with a To connect metal cap, which forms an intermediate piece closing the container, or with the wall of any

009818/1270 * bad original

suitable container, e.g. the conical top of an aerosol container. For example, you can use the fitting too for this purpose provided with an annular, outwardly protruding projection. The with the container or a connection or the outer surface of the molded piece in contact with the intermediate piece can have any number of small projections that extend seamlessly over the circumference of the • Extend the fitting and when pressing against the spacer or the container wall can be deformed in order to create a seal between the fitting and the connecting part or to effect the container. Furthermore, you can provide one or more approaches that serve to seal a dip tube with Effect to connect with the valve. Accordingly, one or more approaches can be provided that make it possible to to connect a nozzle or an actuating button to the valve · Alternatively, you can use the nozzle or the Form the actuating button and / or the immersion tube as fixed components of the coherent fitting.

The invention and advantageous details of the invention are in the following on the basis of schematic drawings explained in more detail using exemplary embodiments.

Fig. 1 shows a two-part valve according to the invention in longitudinal section.

Fi'g. 2 and 5 are partial views of the valve according to Fig.

4 to 7 each show a further embodiment in section Forms "of the invention including dip tubes and nozzles

Fig. 8 is a vertical section through one according to the invention Aerkzeug or · * an injection mold for manufacturing of a valve according to the invention made of a thermoplastic Material.

In Fig. 1 can be seen in an axial section generally designated 1 valve according to the invention in

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BAD ORiGlHAL

^s Combination with a connecting piece or support part 2 made of metal, which can be connected to an edge of an aerosol container by flanging on its outer band.

The actual valve comprises two components, namely a one-piece molded piece 3 made of plastic, for example polypropylene or another suitable thermoplastic, and an annular component 4 acting as a seal, which consists of a elastic material or an elastomer, e.g. natural or synthetic rubber or "j ^ VA".

The molded piece 3 comprises a first section or main body 5 with a downwardly projecting tubular extension 6 delimiting an inlet channel 7 of the valve, a second section delimiting an outlet channel 10 and an annular, thin-walled third section 8 _f which acts as a spring and the first section 5 connects directly to the second section 9.

The second section 9 is followed by a fourth section 11, which together with the first section 5 an annular cavity 12 delimits. The outlet channel running inside the second section 9 extends through the fourth section 11 and communicates with the outer surface of this section via two channels 13 and 14, which open onto openings, one of which extends further in the direction of the inlet channel 7 than the other. Fig. 2 shows the section 11 when viewed in the direction of arrow A in Fig. 1, around the channel 13 and its Opening 15 on the outer surface of section 11 to recognize permit. FIG. 3 shows the section 11 when viewed in the direction of the arrow B in FIG. 1, around the channel 14 and to make its opening 16 recognizable on the outer surface of section 11.

It can also be seen from FIGS. 1 to 3 that the section 11 has a shoulder 17 on which the section 11 completely surrounds and at the top of the annular

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BAD ORiGhMAL

Seal 4 rests. It should also be noted that the section and the seal 4 have cooperating conical surfaces.

The first portion 5 is on its outer peripheral surface with ribs 18 extending in the circumferential direction and with circular ones on its annular upper end face Ribs 19 provided. The fins 18 are dimensioned so that they are with an interference fit with a cylindrical portion of the 'i' piece 2 work together. The deformation of the ribs 18 thus causes a seal between in this area the plastic of the valve and the metal of the I carrier so In addition, the l'ragstück 2 in the designated 20 Area so deformed that it flanges against section 5 is, so that the ribs 19 with sealing iVirkun ^ 'are brought into contact with the iragstück 2. at this arrangement- is not intended to be any separate Seal between the i'ra ^ 'piece of metal and the To arrange valve. However, with the valve according to Fi ^. 1 to 3 as well as the others to be described Provide a .seal for example designs by that you put liquid latex in the gap between the i'ragstack 2 and the molding 3 is injected.

u-use of the valve is a '. immersion pipe in the Section 6 introduced until its upper .rinde rests on the underside of the seal 4. This dip tube comes with the section 6 preferably connected by spot welding. In addition, a nozzle part is placed on section 9 or "built into" it

When the valve is already in use, there is a situation in the inlet channel 7 a pressure by which the seal 4 is pushed upwards 7 / ird, so that the sealing pressure increases due to the conical shape of the cooperating sealing surfaces, .i / ied now to section 3 with the help of the usually called üet ^ ti ^ ungsknopf trained nozzle a downward acting

009818/1270

BATH ORIGINAL

· -ΙΟ-

Applied force, the section 11 moves opposite the main body 5 downward, the spring portion 8 being deformed. This through the shoulder 17 on the seal 4 transmitted force causes the sealing surface of the gasket to widen or from the fourth section 11 is "unrolled" to the outside, so that the opening 15 with the Inlet channel 7 is connected and the pressurized product can be discharged through the nozzle - »/ can be grounded, tfird applied even stronger actuating force, the opening 16 is connected to the inlet channel 7, so that per unit of time a larger amount of the product is delivered.

The presence of the two channels 13 and 14 and the associated openings 15 and 16, which are arranged at different heights enables the associated container to be filled quickly via both channels and, if necessary, allows it a relatively slow dispensing speed using the channel 13 by the application of a small actuating force to achieve.

4 also shows a valve 1 according to the invention, which is modified in a certain way and combined with a nozzle part 21 made of plastic, a dip tube 22 made of plastic and a support piece 2 with a sealing ring 23 inserted therein. The shaped piece 3 differs in several points from that described with reference to FIG. 1. First, the cavity 12 is provided with a shoulder 24 for determining the position of the seal 4. Furthermore, the outlet channel 10 is arranged eccentrically in the second section 9 in order to give this section greater rigidity of the fourth section 11 connection. ι Further, the fourth section 11 is provided at the same height with the lower end of the channel 13 on its outer surface with a circumferentially extending annular groove sich'über its entire 25th When a lateral force is applied to the nozzle part 21, the annular groove 25 is thus connected to the inlet channel 7, and it is

009818/1270 'bad original

■ 19 ** 458

direction of the lateral force creates such a connection represents. If an additional channel according to the channel 14 after? 1 is provided for filling the container,

this channel preferably does not open into the hanging groove 25

It can be seen that both the nozzle part 21 and the immersion tube 22 are pushed onto outer surfaces of the molded piece 3 are, but other arrangements could be made and one of these components or both components respectively cooperate with an inner surface of the fitting. In the event that shoulder 17 is omitted, it should be noted that the valve could be operated simply by sliding a falling movement between the fourth section 11 and the sealing ring 4 brings about.

FIG. 5 shows an embodiment in which the nozzle part 21 and the dip tube 22 are inserted into sections of the molded part 3. It can be seen that the dip tube 22 the sealing ring 4 in the cavity of the molded piece in the _<proper position holds · The Ta chrohr can with the portion b of the molded piece welded.

In Fig. 5, the dashed lines indicate a channel on, which connects the outlet channel 10 with a surface of the fourth section "11, which is not on the radially inward facing surface, but on another surface of the sealing ring 4 is present. This channel 26 can be used to achieve a higher filling speed, because the pressure of the the outlet channel 10 while the container is being filled. led product lifts the sealing ring 4 down from the fourth section 11, so that an additional The flow path for introducing the product is exposed.

Furthermore, the valve according to FIG. 5 comprises one which is connected to the main body or the first section 5 Flange 27, by means of which the fitting can be sealed against a container. A rib 28 on the Top of the flange, which extends over its circumference

f Mt

009818/12

OR! QU-iAL INSPECTED

'stretches, contributes to the achievement of a perfect sealing · ο The flange can be flared with a support piece 2 are connected, with a seal optionally arranged between the two components will.

FIG. 6 shows a further embodiment in which the main section of the nozzle part 21 with the shaped piece 3 consists of one piece, the nozzle part 21 being closed at its upper end by a stopper 29 made of plastic is.

In this embodiment there is a sealing ring 4 provided with a conical outer surface which is supported on its underside on a shoulder 24 of the molded piece. A further seat 30 is formed on the fourth section Ii and can additionally or alternatively to the Shoulder 24 may be provided.

In this embodiment, the main body 5 of the valve is suspended from the upper part 31 of a plastic bottle together, the lower part 32 of which is separately molded and welded to the upper part 31.

Fig. 7 shows a valve 1 according to the invention, which with an aerosol container 33 with a sealing effect by means of a cup part 34 made of ketall, which is connected by a pressing operation is deformed so that it causes a seal against the neck of the üehälters; For improvement the sealing effect "a sealing ring 23 is also provided.

Fig. 6 shows schematically in longitudinal section an injection mold for producing the molded piece 3 for a valve from a thermoplastic material, as shown in FIG is. The tool or the injection mold comprises several from each other .separable components made of ketallic and in particular two components 35 and 36 for delimiting a cavity, the-

009818/1270 " _BAD original

1362458

sen inner shape determines the outer shape of the fitting. the The shape of the fitting on its inside is determined by two bolts 37 and 38, which fit into matching openings the components 35 and 36 can be introduced. The bolt 37 determines the shape of the outlet channel and the inner shape of the fourth section 11 of the shaped piece. Further if the bolt 37 carries detachably attached lugs 39 and 4-0 for generating the channels 13 and 14. The Components 35 and 36 contain cooling water channels 4-1 as well Channels 42 for injecting the thermoplastic material.

Furthermore, the injection mold is not shown with one Device for the automatic ejection of the molding provided, for example sliding in the channels of the components 35 and 36 guided tours «,

Finally, it is possible to push the sealing ring 4 through Cutting off a corresponding part to produce from a tube that consists of a Llastomer material.

.i / ie mentioned, the dip tube can serve to the sealing ring 4 to keep in his Ls. ^ E,, alternatively one can a relatively rigid short tube made of e.g. iwetall or I-olyäthyien consists of high specific gravity, provide to hold the sealing ring in place, and a flexible .l'auchrohr could be attached to this rigid pipe " be. Here it can be seen that the rigid pipe is the Sealing ring 4 holds more securely than a flexible pipe or a hose, and that one therefore on the use of a can do without a relatively rigid immersion tube.

Finally, it should be noted that on the molded piece 3 a closure cap for a bottle or can ausbilden .kann, the shaped piece then from the upper part of Fig. 6 receives an apparent shape. The closure cap 31 can be welded to a bottle or can, or the cap can be provided with an internal thread, or a metal fastening band enclosing the cap can be seen or another material.

Claims t

009818/1270

BATH ORIGINAL

Claims (1)

A ii S P H il C H E Valve part for delimiting a flow path through which geken. nzeichn.et that -the valve part 'Is designed as a one-piece molded piece (3) which contains a cavity (12) which forms a section (11) of the molded piece encloses, and in which an annular sealing member (4) can normally be held so that it closes the flow path, since it is supported on the mentioned section (11), and a spring is provided is, which is formed by a further section (8) of the molding, the sealing part normally in its Holds closed position and to open the flow path allows a relative movement between the sealing part and the cooperating section (11). 2. Valve part according to claim 1, characterized in that the one-piece molded piece (3) several comprises contiguous sections, namely a first annular section (4), by means of which the shaped piece is connected to or can be connected to a container with a sealing effect, an outlet channel (10) delimiting the second section (9) »a spring forming, the first section (5) with the second Section (9) connecting the annular third section (8) and a fourth section (11), which extends from the second section extends from and in a cavity (12) within the first section and the spring forming Ahschnitts is arranged, this fourth section delimiting one or more channels (13, 14 ·) which define the outlet channel (10) with an opening (15 »16) on a surface of the fourth section, the or each opening normally closed by the annular sealing part (4), is held. 3. Valve part according to claim 2, characterized in that the or each opening (15, 16) on 009818/1270 ORKSiNAL INSPECTED a surface of the fourth section (11) running in the circumferential direction opens, in order to there through the radially inwardly facing surface of the annular sealing part (4-) to be kept locked up. 4-. Valve part according to claim 3 »characterized in that the fourth section (11) is shaped in this way is that it moves away from the second section (9) rejuvenates. 5. Valve part according to claim 3 or 4-, characterized in that the fourth section (11) a hat (25) communicating with the opening (15) which extends at least over the major part of the circumference of the fourth section (11). 6. Valve part according to one of claims 3 to 5j, characterized in that the fourth section (11) has a groove which establishes a connection between surfaces of the annular sealing part (4) facing away from one another when the sealing part is in its closed position, and that this -sut not in connection with the or · each opening (15 »16) in the closed position _; -stent. 7. Valve part according to one of claims 2 to 6, characterized in that the fourth section (11) has several openings (15 »16) on its outer surface, each of which is associated with the outlet channel (10) stands, with two of the openings their ends further away from the second section (9) extending along the fourth section (11) extend over different lengths. 8. Valve part according to one of claims 1 to 7 »for receiving an elastic annular sealing part, characterized in that the shaped piece (3) has a shoulder or protrusion (17) which (049810/1270 BATH ORIGINAL si.ch is supported on the annular sealing part (4) so that that the sealing part with the mentioned Kelativbewe ^ 'ung is deformed. ■ 9. Valve part according to claim 2 and 9, characterized in that the shoulder or the Projection (17) is formed on the fourth section (11). 10o valve part according to one of claims 1 to 9 »thereby characterized in that the shaped piece (3) has a Has seat (24) for determining the position of the annular sealing part (4). 11. Valve part according to one of claims 1 to 10, characterized in that the shaped piece (3) is made of polypropylene. 12. Valve part according to one of claims 1 to 11, characterized in z-eich η et, deii the shaped piece (3) its outside one or more in the circumferential direction running butts (18, 19, 28) which cooperate with a sealing effect with a container or a l'ragstück. 13. Valve part according to one of Claims 1 to 12, characterized in that the shaped piece (3 ) has a flange (27) for fastening the shaped piece to a container or a support piece. 14. Valve part according to one of the λπξγ: smells 1 to 13, thereby characterized in that one with the fitting (3) pendent lug (6, an ijinlaßkarial (7), which is designed as a dip tube, or to which a dip tube can be attached. 15 · Valve part according to one of Claims 1 to 14, in combination with a spray nozzle, which draws g e k e η η, that a rlau: part (21) of the tipritz you send 009818/1270 BATH ORIGINAL 1952A58 partly forms part of the molded piece (3). 16. Valve part according to one of claims 1 "to 15" thereby gekennz eichnet that it is combined with the annular sealing part (4) that is inside of the fitting (3) is held so that it normally closes the flow path. 17 · valve part according to claim 16, characterized in that the outer surface of the annular Sealing part (4) is conical. 18. Valve part according to claim 16 or 7, characterized in that the annular sealing part (4) is held in place in the fitting (3) by a ear (22) engaging in the fitting » 19 · Valve part according to claim 16 or 17, characterized in that the annular sealing part (4) through an upper section of a dip tube (22) is formed. 2ü. Valve part according to one of Claims 16 to 18, characterized characterized in that the annular sealing part (4) has a rmt which has an open flow path between facing surfaces of the sealing part forms and in the closed position of the sealing part not with the opening or openings (15 »16) in Connection is " 21. Veitilteil according to one of claims 16 to 20, characterized characterized in that the annular sealing part (4) has a rjut which extends at least extends over the largest part of its inner circumferential surface and is in communication with the opening (15). 22. Ve; 'tilteil according to one of claims 18 to 21, characterized g.ekennz eichnet that the annular sealing part (4) consists of an elastomer material. 009818/1270 BAD ORSGINAL 1952453 M 23 * Tool or injection mold for a thermoplastic kmaterial for making a Yeritil part according to one of the Claims 1 "to 22, wherein the injection mold has several components made of ketall urcfaüt, characterized by .that the components ^ 35 »36, 37» 38) within the iipritz form delimit a cavity so that these .components include two .components (34, 33;) projecting into the cavity, that the inner shape of the cavity corresponds to the outer shape of the Valve part including the outer surface of the spring (8) defining the forming section, and that the "two components (37 »38) the shape of an outlet channel (10) of the valve part (3) also determine the shape of an inrierhaxb B of the valve "ceiis provided annular cavity (12) ^ for receiving the annular sealing part (4), wcbei the inner surface of the portion forming the spring forms a wall portion of the cavity, as well as the shape of a Channel (13) which extends from the outlet channel through a section (11) of the valve part which is surrounded by the cavity 'extends to an opening (15) which opens into the cavity on a surface of said section (11). 24. tool or äpritzform according to claim 23 "by at least one component (38) of an inlet channel (7) determines the shape of the valve member (3) and the annular cavity (12), and at least ψ a further component (37) for determining the Jä'orE of the outlet channel (10) and the channel (13) leading to the opening (15). ORIGINAL D09818 / 1270