RU2490188C2 - Tight container - Google Patents

Abstract

FIELD: packing industry.

SUBSTANCE: tight container includes a body, a lock, a cover of cup shape with a sealing gasket in the form of a ring arranged in a slot of a cover formed by a generatrix and external flanging. On the generatrix of the cover under the sealing gasket there are additional six-nine equidistant ledges with size of (20-40)% from the sealing gasket width.

EFFECT: invention provides for reliable sealing of containers, prevents fallout and twisting of a sealing gasket from a cover and simplifies process of sealing gasket removal and replacement.

2 dwg

Description

The invention relates to the field of packaging products in sealed containers. Specifically, it can be used in sealed containers intended for packing charges. Of all the requirements for a sealed container, the main one is to ensure reliable tightness of the container.

Known designs of sealed containers in the form of knots for docking cases with a lid, hermetic packaging, for example, according to the patent of the Russian Federation No. 2025422 [1], cases for ammunition, etc., including a case consisting of a cylinder with a firmly fixed bottom, a cup-shaped lid with gasket and shutter. The closest technical solution is the containers shown in GOST 20854-77 [2] type IV, VII and VIII (prototype).

The sealing of all the listed container designs (Fig. 1, packaging, type VII) is carried out by pressing the closure 2 of the cover 3 with the sealing gasket 4 to the end of the container body 1. For these structures, the container has a cup-shaped lid forming an annular groove 5 due to external flanging 6, in which the sealing gasket 4 is placed in the form of a ring, mainly of a square section (a × b) with a side size of 5.5 ± 0.5 mm, hereinafter referred to as the ring. There are rings of elongated cross section, but their thickness is mainly approximately in the same range, i.e. (5-6) mm. The outer flanging of the cover, forming a groove, is from 40 to 80% of the thickness "a" of the cross section of the ring. The generatrix of the cover 7, on which the ring is attached due to slight interference, exceeds the thickness of the ring from 50% and above its thickness (see figure 1).

The disadvantage of these types of containers is that when closing the shutter or opening the container, there are often cases (observed in practice on containers with a diameter of 233 mm; 174 mm) of falling out of the ring, which led to a violation of the tightness of the container.

However, one of the main disadvantages of these designs is that when the cover 3 is placed on the end of the housing 1 of its generatrix 7, the end of the housing 1 often falls on the edge of the ring 4, which can lead to the turning of the ring and squeezing it out of the groove, as a result of which a violation often occurs tightness of the container. For information, we can say that several million different types of containers are in operation with an inner container diameter of 233 mm, 207 mm, 174 mm, 147 mm with tolerances on the diameter of the case from 3.0 mm to 2.0 mm, since the case is obtained rolling (these are the most common types of containers). And the cover has a generatrix tolerance of 0.2 mm in diameter, as it is obtained by stamping.

The most important thing also lies in the fact that containers of this design are manufactured at enterprises and now, since there is the necessary production base: tooling and stamping (pressing) equipment.

An attempt to eliminate these shortcomings by gluing a sealing (rubber) ring with 78 BTsS-P glue, which ensures the tightness of the container during the warranty period for storing charges (10 years), did not give a positive effect. Firstly, in the adhesive 78 BCS-P there is a solvent that interacts with the components of the powder (its volatile), which leads to a change in its physicochemical and, therefore, ballistic characteristics. Secondly, if the ring is damaged, it cannot be replaced (tear off and stick a new one without cleaning the metal from glue, etc.). In addition, the operation of gluing the ring is time-consuming, since it is necessary to pre-degrease the surface and apply two layers of glue with drying for a certain time.

The aim of the present invention is to remedy these disadvantages, namely the provision of reliable sealing of containers.

This goal is achieved by the fact that in a sealed container that includes a housing, a closure and a cup-shaped lid with a gasket in the form of a ring located in the groove of the lid formed by the generatrix and the outer flange, six to ten outer protrusions are made on the lid form under the sealing ring equidistant from each other with a size of (20-40)% of the width “b” of the sealing ring.

The design of the proposed containers is presented in figure 2 and includes: the container body 1, the closure 2, the cup-shaped lid 3, the sealing ring 4. The ring has a square cross-section of 5.5 ± 0.5 mm (the most common). Even if the cross section of the ring is rectangular, then its thickness “a” is still at the level of 5-6 mm. This is due to the fact that all closure designs of known tar designs (eccentric, hooks, etc.) are made in such a way that, to ensure reliable sealing of the container, the sealing ring is compressed from 10 to 40% of its width “b” (in in our case, from 0.5 to 2.0 mm). Six to ten protrusions 8 are made on the generatrix 7 of the cover 3, equidistant from each other with a size of (20-40)% (0.2-0.4) from the width of the ring “b” (in our case from 1.0 to 2.0 mm).

These equidistant protrusions on the generatrix of the cover under the o-ring with a support provide the necessary technical result, namely: they prevent twisting of the gasket and exclude the possibility of it falling out during operations of removing, putting on the cover, etc. Removing and replacing this gasket can be done without significant effort. The presence on the generatrix of the lid of protrusions of size (20-40)% (0.2-0.4) of the thickness of the o-ring “a” (in our case from 1.0 to 2.0 mm) eliminates the possibility of the end of the container body on the edge o-ring.

Reducing the number of protrusions of less than six may not completely exclude the hitting the case on the edge of the ring. An increase in the number of protrusions of more than ten is not economically feasible, since the required degree of sealing of the container is already ensured due to the reliable retention of the ring in the right position and the complete elimination of the tare body getting on the edge of the sealing ring.

Reducing the size of the protrusion of less than 0.2 width "a" leads to poor retention of the ring. Increasing the size of the protrusion of more than 0.4 width "a" makes it difficult to install when replacing.

The design of containers with a diameter of 174 ^+2.0 mm was finalized in terms of introducing six protrusions equally spaced from each other on the generatrix of the lid. Checking the container by transportation showed that the sealing ring is held by these protrusions and the lid of the ring does not get edge on the end of the body.

LITERATURE

1. RF patent No. 2025422, MKI B65D 41/18. Sealed packaging for bulk and liquid materials / I.V. Yusupov, G.I. Marchenko, L.V. Grolman, G.G. Valeev, R.Kh. Khairutdinov, V.L. Khokhlov; Applicant and patent holder Kazan scientific researcher. chemical products. - No. 4939543/13; declared 05/28/91; publ. 12/30/94.

2. GOST B 20854-77. Special metal packaging. General specifications. - Instead of GOST B 20854-75; enter 01/01/78. - M: Publishing house of standards, 1979. - 32 p.

Claims (1)

Hermetic packaging, which includes a housing, a closure, a cup-shaped lid with a gasket in the form of a ring located in the lid groove formed by the generatrix and the outer flange, characterized in that six to ten additionally equidistant from each other are made on the generatrix of the lid under the gasket protrusions of size (20-40)% of the width of the gasket.

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