CZ36648U1 - A semi-finished product for producing a container for storing, transporting and discharging a beverage - Google Patents

Description

In the registration procedure, the Industrial Property Office does not determine whether the subject of the utility model meets the conditions of eligibility for protection according to § 1 of Act. E. 478/1992 Coll.

CZ 36648 UI

A semi-finished product for the production of a container for storing, transporting and discharging a beverage

Field of technology

The subject of the presented technical solution relates to semi-finished products for the production of a container for storing, transporting and discharging the liquid present in a pressure vessel, especially semi-finished products produced by injection under pressure, which are further used in the production of containers by blow molding and are equipped with closing means.

Current state of the art

To produce the final product, i.e. the container, the semi-finished product, which is essentially cylindrical in shape, obtained by casting from a polymeric material, preferably from polyethylene terephthalate, is heated and then a full-sized bottle is produced by internal air injection. During the blow molding process, the configuration of the container frame (body) changes so that the neck remains unchanged and matches the shape and size of the neck of the blank.

Containers closed with valve assemblies (caps; English fittings) are used for storing and dispensing beverages, for example beer. In order to push the beer out of the keg, it is necessary to create excessive pressure in it. For this purpose, a gas, usually carbon dioxide (sometimes nitrogen, inert gas or air), is supplied to the barrel of the drink. For plovers, the overpressure is typically about 2.5 to 3.5 bar. The pressure indicated is the operating pressure of the container. When assembling the container, it is necessary to check the force applied to tighten the cap in order to ensure the tightness of the structure. When disposing of the used container, safety precautions must also be observed by first releasing the excess pressure.

The caps have several channels that ensure the passage of liquid and gas. During the filling process, when the container is upside down, the beverage is injected through the first channel of the valve assembly, while the displaced gas exits the container through the second channel. If the container is filled in the normal position (cap upwards), as during the discharge process, gas (nitrogen or carbon dioxide) is introduced into the container through the first channel to force the beverage out of the container through the second channel. Bottling is carried out by means of a discharge head connected to the valve assembly, which presses on the spring elements of the valve assembly, with the subsequent opening of the channels, one of which is designed to supply inert gas under positive pressure, and the other channel is used to discharge the gas-extruded beverage.

For economic reasons, containers made from this type of preforms are usually blown directly at the place where the container is filled with the beverage. This is mainly due to the cost of transporting large containers. The customer is therefore supplied with a preform with closures corresponding to his throat.

A keg with a cap is known (utility model RU 168291, priority date 28/10/2016, published 26/1/2017) containing a container with a neck, a threaded cap consisting of a sleeve, a valve mounted therein and a spring which is placed coaxially, a sealing element , a cap and a common separation ring that is installed between the sleeve and the container, wherein the sealing element is configured as a single element consisting of two parts having different stiffnesses, where the lower part is a substrate for the spring, which is made of a rigid polymer material and configured as an elongated case, and the upper part is made of a soft polymer material, the cover being press-fitted into the socket.

A barrel (utility model RU 160000, priority date 22/06/2015, published 27/02/2016) is known with a screw cap and a spout, consisting of a hollow container in the form of an axisymmetric body consisting of a neck, a neck part, a shoulder part, a base , the lower part, a vertical tube that is inserted into the container, a threaded cap in the form of an axisymmetric body consisting of a sleeve in which a piston and a piston are mounted, which are located coaxially, the main rubber seals

- 1 CZ 36648 UI and cover, the inside of which is threaded, the handle consisting of a base and a frame, the neck part being formed as an oblong with a support thread, the lower part being formed in the form of voluminous drops, which are smoothed over the edges and surround the bottom of the barrel around the perimeter, the base of which is provided with a specific frame in the form of woven diamonds on the upper and lower sides, the vertical tube protrudes from the elongated throat part to the bottom in the middle of the barrel body, a washer is placed in the threaded cap between the main sealing rubber and the spring, the sleeve is provided thread, the threads of the sleeve and the cover are supporting, the sleeve is attached to the cover by means of the mentioned supporting thread, and a common sealing rubber is placed between the sleeve and the container, from the outside, the threaded cap has a cover with a system of grooves formed on the upper and lower edges, the inner side of the cover is provided with a support thread, the upper part of the cap cover is configured as flattened and gradually passing into the lower part ending with teeth p around the entire circumference, the handle is configured removable, the base of which is in the form of a ring with lobes that are distributed along the circumference from the inside, the frame is trapezoidal with at least two vertically oriented supports that are movably mounted on the ends of the ring (used as a prototype).

The known technical solutions do not provide any possibility to control the force applied during the assembly of the container and accordingly to check the tightness of the assembly. In addition, the threaded connection allows the container to be dismantled. Pressure relief is required for these purposes; otherwise, the procedure may be dangerous for people in the vicinity.

The essence of the technical solution

The technical task of the presented technical solution is to create a semi-finished product for the production of a container for storing, transporting and discharging a beverage, which includes a container with a large volume (20 to 30 liters) and a cap and provides a preset unscrewing force that prevents accidental unscrewing of the cap from the container.

The technical result of the presented technical solution is to ensure the reliability and safety of the container during storage, transport and dispensing of beverages.

The technical result is achieved by the fact that the semi-finished product for the production of a container for storing, transporting and discharging the beverage contains a polymer preform consisting of a cylindrical frame, a lower part and a neck, and a threaded cap, the neck of the preform is provided with a thread and a support ring on which there are locking teeth in the form of radial protrusions, and the screw cap includes a cover with a rim, which at the lower end contains locking grooves of rectangular shape with semi-oval cutouts.

In a preferred embodiment, at least one locking tooth has a trapezoidal shape in longitudinal section.

In another preferred embodiment, at least one locking tooth is arranged at an angle of less than 90° to the neck, preferably 30°-75° - also as at least one first locking tooth.

In another advantageous embodiment, at least one locking tooth is arranged to the neck at an angle equal to or greater than 90° - also as at least one other locking tooth.

In another advantageous embodiment, the semi-finished product according to the presented technical solution contains one to four locking teeth and one to four locking grooves.

Clarification of drawings

The claimed technical solution is illustrated by the drawings:

Giant. 1 is a general view of the preform;

-2CZ 36648 UI

Giant. 2 is the structure of the preform throat, namely:

Giant. 2a is a side view of the neck of the preform,

Giant. 2b is a cross-section through the throat on the line A-A and

Giant. 2c is an axonometric view of the neck of the preform.

Giant. 3 is an overall view of the closure, namely:

Giant. 3a is an axonometric view of a closure with a circular cover and

Giant. 3b is an axonometric view of a cap with a cover in the form of a truncated equilateral triangle.

Giant. 4 is a cross-section of the neck with the cap attached.

Examples of implementing a technical solution

The semi-finished product for the production of a container for storing, transporting and discharging the beverage contains a preform 1 (Fig. 1 to 2) and a cap 2 (Fig. 3 to 4).

The preform 1 includes a lower part 3, a cylindrical part 4 and a neck 5 with a thread. In the lower part of the neck 5 (Fig. 2, a, b, c), a support ring 6 is placed radially, on which there is at least one locking tooth 7, 7a (Fig. 2).

At least one locking tooth 7, 7a is formed in the form of a radial projection. The shape of the radial protrusion in the longitudinal section is trapezoidal.

It is possible to make a number of locking teeth 7, 7a, which are arranged at different angles to the neck 5 of the preform 1 (Fig. 2, item 7 and item 7a).

At least a part of the locking teeth 7, 7a is placed at a beveled angle of less than 90° to the neck 5 of the preform 1, preferably 30 to 75° - the first locking teeth 7. A part of the locking teeth 7, 7a is arranged at an angle equal to or greater than the neck 5 than 90° - second locking teeth 7a.

The location and length of the protrusions have been determined experimentally and correspond to the maximum force required to close the container to prevent unauthorized accidental opening.

Further, the size of the unscrewing force is determined by the number of locking teeth 7, 7a of the atom corresponding to the locking grooves 14. The greater the unscrewing force to be achieved, the more locking teeth 7, 7a need to be provided. However, increasing the number of locking grooves 14 and their corresponding locking teeth 7, 7a to more than four is impractical because it reduces the distance between the grooves 14 and thus reduces the strength of the cover shell, as it is made of plastic and can easily bend or break.

The locking teeth 7, 7a are distributed in a circle and the distances between them are equal.

Without locking teeth 7, 7a, the force for unscrewing is equal to the force for screwing in and is approximately 10N. One second locking tooth 7a arranged to the neck 5 at an angle of 90° will increase the force up to 15 N, two second locking teeth 7a will increase the force up to 20 N, four second locking teeth 7a will increase the force up to 30 N. If of the four locking teeth 7 , 7and two locking teeth located at an angle less than

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90° - the two first locking teeth 7, and the two locking teeth are located at an angle of 90° or more - the two second locking teeth 7a, then the unscrewing force is greater than 40 N.

The strength also depends on the hardness of the material of both, the neck and the frame.

A cap 2 is attached to the neck 5 of the container by means of a thread, including a cover 8 (Fig. 3, Fig. 4) made in the form of a mushroom with a central hole, containing a valve element 9 and a hollow rod 10 installed along the longitudinal axis, a spring 11 and an annular nut 12, which ensures its compression.

The cover 8 is provided with an annular edge 13, on the inner surface of which a thread is formed, and at its lower end there is at least one locking groove 14 designed to control the quality of the closure, as well as to control the unauthorized removal of the cap 2.

The locking groove 14 has the shape of a rectangular recess conjugated on both sides with semi-oval cutouts.

The provision of semi-oval cutouts makes it possible to remove the stresses that arise in the material when the cover 8 is screwed onto the neck 5 of the container. This is particularly important when operating and storing a container with a cap 2 at low temperatures.

The cover 8 can have a base either in the form of a circle (Fig. 3a) or in the form of a truncated equilateral triangle (Fig. 3b), the vertices of which are limited by a circle.

Implementation of the presented technical solution

The preform 1 is made of polymer materials, especially polyethylene terephthalate (PET), by injection molding. Polymeric materials are used to manufacture the cap 2, in particular the cover 8, the hollow rod 10 and the ring nut 12 of the cap 2 can be made of polyacetal and the valve element 9 can be made of silicone rubber.

After blowing the container from the preform 1, the neck 5 remains unchanged.

Giant. 2 is a structural drawing of the socket 5 and one of the specific embodiments of the locking teeth 7, 7a.

For example, in order to achieve a force for unscrewing the cap from the container of 40 N or more, there must be at least four locking elements on the neck 5 and on the cover 8.

The locking teeth 7, 7a are trapezoidal on the neck 5 in longitudinal section and are located at different angles as follows: the two first locking teeth 7 are located at an angle of 47° to the neck of the barrel and the other two second locking teeth 7a are located at an angle of 90°.

The container is assembled as follows:

The valve element 9 is installed in the center hole of the cover 8 of the cap 2, and the hollow rod 10 on which the spring 11 is installed is installed in the center hole of the valve element 9. A sealing ring 15 is installed between the spring 11 and the surface of the valve element 9. The resulting structure further compressed by ring nut 12.

To ensure a tight connection, a gasket is installed in the groove on the edge of the rim 13 and the cylindrical shoulder of the cover 8. The cap 2 is mounted in such a way that a tube for draining the drink is connected to it on the neck 5 of the container by means of a threaded connection.

When closing the container with a cap 2 equipped with locking grooves 14, the edges of the locking grooves 14 pass easily over the locking teeth 7, 7a of the neck 5 due to the bevel, without creating an obstacle for screwing. The force for screwing is always within the specified limits of the determined frame geometries,

-4CZ 36648 UI by the thickness of the sealing ring between cap 2 and the container and the number of revolutions. When attempting to unscrew, the opposite edge of the locking groove 14 on the cover 8 of the cap 2 engages with the locking teeth 7, 7a, the bevel directing the bending forces inward to the socket 5, maximally engaging with the locking teeth 7, 7a of the socket 5, thereby creating the maximum force for unscrewing .

Advantages:

- visual control of the quality of the closure, because when closed correctly, the protrusions of the cover should be exactly between the locking teeth 7, 7a of the neck 5;

- reliable closure that prevents unauthorized removal of the cap 2. The engaged locking teeth 7, 7a on the neck 5 and the locking grooves 14 on the cap 2 complicate the process of removing the cap 2. The cap 2 cannot be unscrewed without special devices, which increases the safety of handling containers under excessive pressure . If the cap 2 is removed from the container, damage to the 15 locking teeth 7, 7a of the neck 5 of the container will be visually visible.

Claims (4)

PROTECTION CLAIMS 1. A semi-finished product for the production of a container for storing, transporting and discharging a beverage containing a polymer preform (1) consisting of a cylindrical part (4), a lower part (3) and a neck (5), and a threaded cap (2), characterized by that the neck (5) of the preform (1) is provided with a thread and a support ring (6) on which there are locking teeth (7, 7a) in the form of radial protrusions, and the threaded cap (2) includes a cover (8) with a rim (13) , which at the lower end contains locking grooves (14) of rectangular shape with semi-oval cut-outs. 2. A semi-finished product according to claim 1, characterized in that at least one locking tooth (7, 7a) is trapezoidal in longitudinal section. 3. A semi-finished product according to claim 1, characterized in that at least one first locking tooth (7) is arranged at an angle of less than 90° to the neck (5), preferably 30° to 75°. 4. A semi-finished product according to claim 1, characterized in that at least one other locking tooth (7a) is arranged at an angle equal to or greater than 90° to the neck (5). 15 5. A semi-finished product according to claim 1, characterized in that it contains one to four locking teeth (7, 7a) and one to four locking grooves (14).