JP2013502350A - Valve with safety protrusion - Google Patents

Abstract

The present invention relates to a container valve (1), said valve (1) having a plug system (10) and defining a channel (3) having an inflow end (4) and an outflow end (5). And a stem (6) configured to be slidable within the channel (3), the grommet (2) comprising at least two parts (7), (8) for hermetic engagement, the first of which Part (7) has a protrusion (11) into the second part (8).
[Selection] Figure 1

Description

  The present invention relates to a novel spray valve for a pressurized fluid container and to forceps, particularly a one-component polyurethane foam application.

  In a wide range of applications, it is generally known to store fluid in a pressurized state in a container (can or vessel). This fluid is normally delivered from the container by a valve provided in the container cup. Well-known applications are sprayable foams used for both industrial applications and hobbies. This leaves the container with the sprayable foam in a rather harsh situation in terms of temperature and pressure.

  In these harsh situations, the pressure in the container is increased and the valve is detached from the container, making it potentially safe.

  In order to avoid the above, several safety measures are used, for example providing a “burst part” in the overpressure relief valve or vessel. However, the use of overpressure relief valves is expensive. On the other hand, if fragile “burst parts” are provided in the containers, the use characteristics of these containers may cause inadvertent rupture of the containers, and cannot be selected at the construction site. .

  Still, to prevent the valve from being detached from the container due to overpressure, it is possible to mold a portion of the grommet onto the container cup. However, this above molding is a cost-effective process.

  The novel valve of the present invention eliminates the above-mentioned drawbacks. It is possible to increase the adhesion between the different grommet parts in order to prevent the valve from coming out of the container due to overpressure.

  The valve according to the present invention is a container valve, and the valve includes a cup, a grommet defining a channel having an inflow end and an outflow end, and a stem configured to be slidable in the channel, The grommet includes at least two parts that engage for sealing, the first part having a protrusion into the second part.

  In addition, while this valve is safe and sufficiently resilient, it is equally moisture resistant and prevents the valve from sticking or clogging.

  The use of a valve in the container has already been disclosed in EP1,074,484. The present invention discloses a valve comprising a plastic cup attached to the open edge of a pressurized metal container, which comprises a coupling device for the metal container adapter of the supply unit. The plastic cup further comprises a cylindrical pot wall that is deformable, in particular clinchable. The coupling device for the metal container adapter is formed as an integral connecting part. It is made of a plastic material and is attached to the outer edge of the valve head pot wall via a thin connecting web. A safety lip is provided to help withstand the pressure.

  The coupling device of the present invention includes a safety lip that helps withstand pressure, but the inside of the valve is not protected against rising pressure. If the pressure inside the metal container rises due to severe conditions in temperature and pressure, grommets made of different materials will loosen and the valve will come off the container. In addition, thermoplastic materials are well known as thermoplastic (TP) rubber properties, even if thermoplastic materials are used to provide hydrophobic properties and not dissipate / absorb ambient moisture in the container through the valve. There are other inconveniences such as “creep”. Creep deforms the material and causes the grommet to desorb from the cup when the container is placed under high pressure.

  From the above, the present invention does not use an embedding or molding step, does not require the use of a spring, and has a valve for supplying a pressurized fluid with safe characteristics, high adhesiveness, and sufficient elasticity, and the pressurization. And an assembly used to supply fluid.

  Furthermore, it is a valve provided for a container for supplying a pressurized fluid, and is water-repellent, suppressing the diffusion and / or absorption of moisture that causes the valve to become sticky or clogged.

  None of the prior art discloses a valve according to the present invention, nor does any of these documents suggest that the benefits currently available from this can be achieved.

  The present invention relates to a valve for a container, and the valve includes a plug system, and includes a grommet that defines a channel having an inflow end and an outflow end and a stem configured to be slidable in the channel. It comprises at least two parts that engage for sealing, the first part having a protrusion into the second part.

  The present invention relates to a container valve (1), said valve (1) having a plug system (10) and defining a channel (3) having an inflow end (4) and an outflow end (5). And a stem (6) configured to be slidable within the channel (3), and comprising at least two parts (7), (8) with which the grommet (2) engages for sealing, The first part (7) has a protrusion (11) into the second part (8).

  An advantage of the valve of the present invention is that the grommet design provides an additional safety measure. The container dome even when the container is under pressure due to severe conditions in temperature and pressure due to the first part of the grommet comprising the plug system and the protrusion into the second part of the grommet The valve cannot be removed from (9).

  Another advantage of the valve according to the present invention is that providing a first part of the grommet having a protrusion into the second part of the grommet provides additional elasticity. Also, increasing the contact surface of the first and second parts of the grommet provides additional adhesion and sealing. In addition, different parts of the hydrophobic grommet are dual injected. The technique of injecting parts of different grommets ensures the adhesion of the first and second parts of the grommets.

FIG. 1 is a schematic view of a valve for a pressurized fluid supply container according to the present invention.

  1 and 2, the present invention provides a valve (1) for a pressurized fluid supply container, which has a plug system (10) and has an inflow end (4) and an outflow end. A grommet (2) defining a channel (3) having (5), and a stem (6) configured to be slidable in the channel (3), the grommet (2) having the outflow end (5) A first part (7) provided on the inflow end (4) and a second part (8) provided on the inflow end (4). The first part (7) is provided with the second part (8). ) It has a protrusion part (11) inward.

  The valve (1) is designed with an opening in the container dome (9) that controls the fluid supply from the container. In the preferred embodiment, the valve (1) is clinched at the opening of the container dome (9). A radially outwardly extending plug system (10) is provided to stop the valve against the rim (30) of the container dome (9). This radially outwardly extending plug system (10) is preferably composed of a thermoplastic material reinforced with a reinforcing additive such as glass fiber. The plug system (10) is elastic. The plug system (10) of the grommet (2) is snapped into the opening of the container dome (9) and clinched to the rim (30) of the container dome (9). The plug system (10) provides additional safety. The first part of the grommet having a plug system and a protrusion into the second part of the grommet causes the valve from the container dome to become harsh in terms of temperature and pressure and the container to become overpressured. Will not come off.

  The first part (7) of the grommet (2) is made of a thermoplastic material such as polyethylene, polypropylene, polyamide, ABS, POM or PET, preferably reinforced with an additive such as glass fiber. When a thermoplastic material is used, particularly in the valve (1) in which the two parts (7) and (8) are in close contact with each other, the first part (7) protrudes into the second part (8) ( 11), and corrosion that occurs when a metal cup is used is preferably avoided.

  The first part (7) is formed in a ring shape and the central part defines the inflow end (4) of the channel (3). This first part (7) is designed to comprise a plug system (10) that clinch the valve (1) to the container rim (30), preferably by a radially outwardly extending portion (31). Has been. This extending part (31) can be designed as a continuous ring or, more preferably, as a radially extending part (31) with a number of spaces. As shown in FIG. 2, the part (31) extended in the radial direction which separated the space is provided. The shoulder (34) of the radially extending portion (31) across the space is provided to be snapped onto the container rim (30), so that the container dome ( Further safety is provided to prevent the valve (1) from being removed from 9).

  Preferably, the first part (7) further comprises an extension (19) which is injection molded and extended with the grommet and the plug system (10) of (2). This extension (19) extends over the rim (30) of the container dome (9) and is preferably designed as a multipurpose connection ring for the metal container adapter of the supply unit. Two or more, preferably four extension legs (33) are connected to the extension (19) to reinforce the extension (19). In the preferred embodiment, the four elongated parts (31), the extension (19) and the four legs (33) of the plug system (10) are integrally injection-molded simultaneously. The sealing of the first part (7) to the container dome (9) is thereby optimized. The first part (7) of the plug system (10) has a diameter larger than the inner diameter of the opening of the container dome (9), so that the shoulder (34) of the plug system (10) is connected to the container dome ( 9) The rim (30) can be inserted. As shown in FIG. 1 and more particularly in FIG. 3, the inner wall of the first part (7) is provided with a shoulder (22) and the inflow end (1) of the first part (7) of the grommet (2) ( 4) is shaped like a cone.

  Another preferred embodiment of the present invention may include an extension (not shown) surrounding the periphery instead of the four legs (33).

  The second part (8) of the grommet (2) preferably comprises a ring shape defining a part of the channel (3), from which the outflow end (5) of the channel (3) is defined. A conical wall extends. This wall is preferably defined by a stem (6) having an annular extension (12) provided at a predetermined distance from the ring shape. In this embodiment, the ring shape of the second part (8) of the grommet (2) is bonded to the first part (7) of the grommet (2). The second part (8) of the grommet (2) preferably comprises one or more, in this example three inwardly extending sealing lips (20).

  The first part (7) of the grommet (2) comprises a protrusion (11) in the second part (8) of the grommet (2). This protrusion (11) increases the adhesion between the first (7) and second (8) parts of the grommet (2). The protrusion (11) of the first part (7) into the second part (8) of the grommet (2) provides a contact surface between the two parts and thus the sealing degree of the parts (7) and (8) of the grommet. Increase. When the two parts (7) and (8) of the grommet (2) are more closely attached, the valve (1) cannot be detached from the container dome (9). Therefore, safety is improved. The protrusion (11) of the first part (7) into the second part (8) of the grommet (2) prevents the fluid in the container from contacting the second grommet part (8). Therefore, the material is prevented from sticking inside the grommet (2) and the valve function is prevented from being clogged. Furthermore, the plug (10) and the protrusion (11) extending radially outward improve the elasticity of the grommet (2) of the valve (1).

  According to the present invention, the first part (7) and the second part (8) of the grommet (2) are preferably dual injection molded. Further resiliency is imparted by injection molding different grommet parts (7) and (8). Further, the dual-formed grommet (2) ensures the degree of adhesion between the first and second parts of the grommet. The grommet (2) is designed to increase the degree of adhesion between the surfaces of different parts (7) and (8) of the grommet (2). This additional contact provides a safer alternative to the valve assembly than existing valves for pressurized metal containers. Furthermore, since the first part (7) is dual injection molded, the sealing of the container dome (9) to the rim (30) is optimized.

  The first part (7) of the grommet (2) is preferably made of a hydrophobic and thermoplastic material. The advantage is that the polyurea formed by the reaction between the polyurethane and the surrounding moisture contained in the container may not stick to the first part (7). For this reason, the valve (1) can be correctly sealed with the stem (6) over the entire life of the container.

  In a preferred embodiment, the first part (7) is made of a thermoplastic material, for example polypropylene, polyethylene, polyamide, ABS, POM or PET. These materials can be reinforced with additives such as glass fiber.

  Although these components are hydrophobic, other disadvantages such as creep, a property known to thermoplastic rubbers, occur. Thus, there is a need for an improved grommet that is hydrophobic but maintains the required rubber snappy properties and does not necessarily require a spring.

  According to the invention, the hardness of the first part (7) is harder than the second part (8) of the grommet (2). Preferably, the second part (8) is made of a material having a Shore hardness A35-A90, more preferably a Shore hardness A70-A85, and even more preferably a Shore hardness A80.

  The second part (8) is, for example, butadiene styrene, butylene styrene, silicone rubber, isopropyl ether (Kraton, Shell), chlorinated polyethylene (Tyrin, Dupont de Nemours), epichlorohydrin homopolymer or copolymer, ethylene propylene (Nordel, Dupont de Nemours), fluoroelastomers (Viton, Dupont de Nemours), Alclin MPR (chlorinated olefin interpolymer alloy), Santoprene, Vegaprene, Geolast, Thermolast, and Tresfin (Advanced Elastomer Services (Exxon, Elastollain (Elastrogran))) Can be made of elastomer. In a preferred embodiment of the invention, the second part (8) of the grommet (2) acts as a spring.

  As shown in FIG. 1, the stem (6) comprises a disc-shaped base (17) and a conical protrusion extending therefrom, which conical protrusion (14a) near the disc. And a supply channel (14) having an outlet (14b) at the distal end of the protrusion. The inflow port (14a) is defined by a conical protrusion hole adjacent to the disc-shaped base. The stem (6) preferably comprises first and second disc-like elastic lip portions (15), (16), both of which are provided on the outer circumference of the disc-like base portion (17). . The diameter of the first disc-shaped elastic lip portion (15) is preferably larger than the diameter of the second disc-shaped elastic lip portion (16).

  In the assembled configuration, the stem (6) is inserted into the channel (3) of the grommet (2), where the grommet (2) has a circular sealing lip (12) at the outflow end (5) and an inflow end (4 ) Between the disc-shaped base portions (17). The stem (6) is in close contact with the inner wall of the channel (3), where the seal is first and second facing the conical shoulder (22) of the first piece (7) of the piece or grommet (2). Two disc-shaped elastic lip portions (15), (16), guaranteed by an annular extension (12) facing the conical protrusion of the piece or stem (6).

  As shown in FIG. 1, the valve is incorporated in the opening of the rim (30) of the container dome (9), and the inner wall of the rim (30) opening includes the ring foam (19), The grommet (2) is fixedly sandwiched between the shoulder (34) of the first part (7), thereby providing a first sealing function. Clearly, the shoulder (34) of the first part (7) of the grommet (2) is located in the container. Furthermore, the first part (7) of the grommet preferably has a diameter that is larger than the inner diameter of the cup opening so that the valve (1) does not accidentally come off the dome (9).

  In a preferred embodiment, the second part (8) of the grommet (2) is injection molded along the first part (7) of the grommet. This method increases and optimizes the adhesion between the parts (7) and (8) having different grommets. The protrusion (11) of the first part (7) in the second part (8) of the grommet provides additional sealing and safety. Preferably, the second part (8) of the grommet (2) is injection-formed along the first part (7) and pressed against the rim (30) of the container dome (9). The closed contact surface (13) provides a second sealing mechanism. Since the second part (8) of the grommet (2) is made of an elastic material, a good seal is achieved between the container dome (9) and the grommet (2).

  In operation, the stem (6) is slidable between the open and closed positions of the valve (1). At rest, the disc (17) of the stem (6) pushes against the shoulder (22) of the inner wall of the first part (7) of the grommet so that the valve (1) is closed. To open the valve (1), the stem (6) is pushed in the direction of the container so that the inlet (14a) of the supply channel (3) is in fluid communication with the inner space of the container. When the pressure of the stem (6) is released, the grommet (2) is closed again in the closed position by the elasticity of the second part (8) of the grommet (2) and the pressure inside the container. Due to the protrusion (11) of the first part (7) of the grommet (2), the hole in the inlet (14a) of the supply channel (3) is arranged at the same distance from the second part (8) of the grommet. Both take the valve (1) open / closed position so that the fluid in the container does not contact the second part (8) of the grommet, so that the material adheres to the inside of the grommet (2). This prevents the valve function from being blocked.

  According to the preferred embodiment of the invention and the description of FIG. 1, the second part (8) of the grommet (2) is connected to the grommet of the container dome (9) via a number of injection shafts emanating from the grommet (2). Preferably, dual injection molding is performed on the first part (7) of (2). In this way, the second part (8) of the grommet (2) is fixed on the rim (30) of the container cup (9). Safety is improved by injection-molding the second part (8) of the grommet (2) on the rim of the container dome (9). Even if the pressure in the container rises, the valve (1) is prevented from being detached from the container dome (9). Furthermore, the adhesion between the first and second parts (7), (8) of the grommet (2) is considerably improved. The first part (8) of the grommet (2) on the first part (7) of the grommet (2) at the position where the contact surface (13) is pushed against the rim (30) of the container dome (9). Another advantage is that the radially outwardly extending plug (10) and the thermoplastic sealing surface (13) can seal the cup (9) of the pressurized metal container without using a crimping device. It is.

  Another embodiment of the present invention is provided with a thermoplastic multi-purpose connection ring (19) at the intermediate connection portion so that it can be easily mounted on the foam applicator shown in FIG. The presence of the external thread (21) facilitates the external attachment of the foam applicator to the thermoplastic multipurpose connection ring (19).

  According to a preferred embodiment of the invention, the thermoplastic multi-purpose connecting ring (19) is injection molded as an extension of the first part (7) of the grommet. For this reason, the valve (1) and the multipurpose connecting ring (19) are formed as an integral part provided on the rim (30) of the container dome (9) as shown in FIG.

  In another embodiment of the present invention, the valve (1) comprises a radially outwardly extending plug system (10) that provides additional safety. The plug system (10) is designed as two legs (40) pressed against the interior of the cup (9) of the container, as shown in FIG. Furthermore, this preferred embodiment design eliminates the need for mechanical clinching to secure the valve (1) to the rim (30) of the container dome (9), so that the valve (1) is a clinch instrument. It is possible to assemble without using, and the manufacturing is simplified and the manufacturing cost is reduced. Further sealing is achieved by the legs (10) extending radially outward of the first part (7) of the grommet abutting the container dome (9).

  In another embodiment of the invention, the spray valve (1) of the invention comprises a spring mechanism mounted on the first part (7) of the grommet (2) to assist in closing the valve during filling ( Not shown).

  Prior art grommets have been replaced by grommets (2) comprising a combination of the first part (7) having a protrusion (11) into the second part (8). This protrusion (11) prevents the second part (8) of the grommet from coming into contact with the contents of the container. Furthermore, the protrusion (11) improves the degree of adhesion at the interface between the first component (7) and the second component (8). This eliminates the need for additional processing steps such as laser welding to join both components.

  The valve (1) further needs to be water resistant. For this reason, the first part (7) of the grommet (2) is preferably made of a hydrophobic thermoplastic material. To prevent chemicals in the container from being moisture-reactive and reacting with moisture and / or gas to form the final polymer, thus preventing the final polymer from forming inside the metal container or vessel Any contact with ambient moisture should be avoided. Moisture is dissipated through the valve system, more specifically rubber grommets in the case of guns and tilt valves. Furthermore, contact between the chemical components in the container and the second part (8) of the grommet is prevented by the protrusion (11) of the first part (7) in the second part (8). Moisture permeation, which can cause stickiness or clogged valves, is thus avoided.

  The valve (1) of the present invention is a novel spray valve for pressurized fluid containers, and more specifically, for OCF (One Component Foam) applications such as polyurethane foam containers, and is used for adhesives, sealants, foods, etc. For supplies and spray paint.

  Although a valve has been described, other devices and / or containers comprising a valve according to the present invention in light of the above description may be suggested by one skilled in the art. It is therefore understood that such devices and / or containers are included within the scope of the invention as defined in the appended claims.

Claims (13)

A valve (1) for a container,
A grommet (2) having a plug system (10) and defining a channel (3) having an inflow end (4) and an outflow end (5);
A stem (6) slidably arranged in said channel (3),
The grommet (2) comprises at least two parts (7), (8) in sealing engagement, the first part (7) having a protrusion into the second part (8). Characteristic valve.   2. The valve (1) according to claim 1, wherein the grommet (2) is dual molded.   3. Valve (1) according to claim 2, characterized in that a multi-purpose connecting ring (19) is injected into the grommet (2) during the same process.   3. Valve (1) according to claim 2, characterized in that the second part (8) of the grommet (2) is formed by dual injection on the first part (7) of the grommet (2). And a valve.   2. Valve (1) according to claim 1, characterized in that said part (7) has a hardness higher than the hardness of said part (8).   Valve (1) according to claim 1, characterized in that at least the first part (7) of the grommet is made of a thermoplastic material selected from polypropylene or polyethylene, polyamide, ABS, POM or PET. Valve to do.   7. Valve (1) according to claim 6, characterized in that at least the first part (7) of the grommet is reinforced with filler or glass fibre.   8. Valve (1) according to claim 7, characterized in that the second part (8) of the grommet (2) is made of a thermoplastic elastomer.   2. Valve (1) according to claim 1, characterized in that the stem (6) is a polyolefin selected from polyethylene or polypropylene.   10. Valve (1) according to claim 9, characterized in that the stem (6) is reinforced with filler or glass fiber.   2. Valve according to claim 1, wherein the stem (6) comprises at least one circular sealing lip (15).   2. Valve according to claim 1, characterized in that the stem (6) comprises at least two annular elastic lips (15), (16). An assembly for a container,
A valve (1) according to any of claims 1 to 12,
-With a thermoplastic extension (19),
Assembly, characterized in that the thermoplastic extension (19) is formed as an integral part of the grommet (2).

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