DE2051842A1 - Process for the production and use of capsules, which are used to attach and seal closures and bottles, and capsules produced according to this process - Google Patents

Description

Copy / goe

October 19, 1970 GzMa / Ra.

Enoplastic, 21100 Varese / Italy

Process for the manufacture and use of capsules, the fastening and sealing of caps and bottles serve, and capsules made by this process.

The subject of the present invention is the production of capsules made of plastic, essentially rigid plastic material, to be placed on bottle necks provided with closures, whereby mainly a frangible seal is to be produced and optionally on the bottle before or after the first opening of the capsule seal, a closure is applied to the pouring opening with which the whole or partially, if appropriate, a unitary whole can be formed.

The present invention therefore relates to a method for using these capsules on flat sharks. Further form the subject of the present invention the shaped and / or used capsules according to the already mentioned Procedure.

The prior art is used for sealing or fastening a closure or the like on the bottles, a laminar metallic element in the form of a capsule with coated

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free inner side used for the bottle neck. If However, the closure protrudes - once coated - is then deformed in place, or at least a furrow or groove Projection provided so that the capsule, once put on and fastened, can no longer be pulled off or otherwise removed without destroying it. This type of procedure entails Disadvantages that, linked to the production of capsules, greatly affect costs. Especially in manufacturing a deep-drawn capsule requires very ductile material, whereby it must also be taken into account that ductility is not only an indispensable factor for the drawing process, but also necessary for the subsequent deformation of the capsule on the bottle neck and on the closure. On the other hand, the desired elasticity must not, may not, exceed certain limits so it must not be so large that it allows the capsule to be removed and reused, but must be substantial Have a degree of inelasticity. Not all materials have these properties, which in general even contradict each other. Metals that are particularly expensive have these properties, and deep drawing can only be done at considerable expense using expensive and complicated machines be performed. With these capsules, there is also another difficulty in affixing fiscal seals.

The purpose of the present invention is to eliminate all these drawbacks and obtain real advantages and savings.

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The inventor has found that inexpensive, rigid plastic Plastic material can use that in one operation Can be deformed with different presses at very low costs by using the lowest possible weights and wall thicknesses. The idea of using plastic material would not have led to any satisfactory result if the inventor did not have this Would have completed the idea by putting the capsule in place (| to treat and specially on the outer surface of the envelope, which is then deformed in the place of attachment of the capsule will. This last idea is completed by employing the simplest means of practicing the process.

The invention has the purpose, cost and results obtained to improve significantly by using simple equipment that is available on the market and that can be used with existing equipment Funds are used. In fact, the capsules can be injection molded on conventional plastic injection molding machines Material done on a large scale. The application of these capsules made of plastic material to bottles can be done in the same place take place where the metallic capsule will be attached, however beforehand in a simple but corresponding modification of the head for the predetermined purpose. Those made from plastic injection molding Capsules can be obtained in any form for which plastic materials can be used, hence also in different ones Colors and patterns, with transparent walls or the

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same. In particular, the capsules with transparent walls allow the fiscal seals to be checked from the outside and consequently the application of this seal under the capsule, that protects it with it.

Further features, advantages and possible uses of the ^ New invention emerge from the accompanying illustrations of exemplary embodiments and from the following description.

It shows

Fig. 1 shows in section an injection mold and one according to the invention Capsule,

Fig. 2 partly in plan view, partly in cross section, according to capsule manufactured using the method of FIG.

Fig. 3 partly in plan view, partly in cross-section, the attachment with the coated capsule at the attachment point of this capsule,

Fig. K partly in plan view, partly in cross-section, the procedural ren of the attachment of the capsule according to Figure 3,

Fig. 5 is essentially a repetition of Fig. 2, however with a modification of the capsule,

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FIG. 6 essentially a repetition of FIG. 4, above with a variation of the capsule shown in Figure 5,

Fig. 7 and partly in plan view, partly in section, of a bottle with one of the many Ausgußvorrichtungetypen, wherein the capsule according to the invention can serve the bottle, even if the capsule is open even with the capsule to be connected to m,

8 shows a view of a bottle with one of the many closures to which the capsule according to the invention can be applied until the capsule is opened for the first time,

9 is a perspective view of a bottle neck with a closure, where the fiscal seal has already been affixed and a transparent capsule has been pulled over it,

Flg. 10 is a perspective view of a bottle neck to which a transparent, correctly attached capsule has been attached.

With reference to the figures, according to the present invention, a Capsule 2 made of plastic material. This capsule is injection molded in a conventional manner into a mold with two Parts 1 ', 1 "produced. The cavity 11 between these two parts is filled via a channel 12 by means of

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a nozzle 13 belonging to a conventional injection molding press. The shape of the capsule can be very different. In order to get to know the limits of the shape of the capsule, one only needs to consider its function. In order to wrap the top outside of the bottle, it must consist of at least a cylindrical wall 20 and a top wall 21, ie it must have a substantially cylindrical cup-like shape which can be pulled over the neck of the bottle. As far as the function of the capsule is concerned during and after the opening of the bottle, however, it is desirable that the cylindrical envelope 20 remain connected to the neck of the bottle. In order to empty the contents of the bottle, one must break the top wall 21 or the part 22 above the capsule. It is advantageous, however, that the part 22 which has to be removed can be removed without using special tools, but only by hand. For this purpose, a weak-walled furrow 23 is provided at a suitable height; The break occurs along this furrow when one part of the capsule is stressed in relation to the other, for example when rotating. In order to facilitate this handling, the upper part 22 is knurled or in any case designed so that it can be easily detached , for example by means of knurling 2k . To save money, the capsule 2 should be as soft as possible in its

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Application limits be designed in order to be able to detach them. For aesthetic and commercial reasons, the capsule should be made longer in order to give the bottle neck 4 a good appearance. This property, the length of the capsule 2 to stretch out, as well as the covered area, is another Feature of the present invention, since it is difficult with the metallic capsules, over a length of 60-70 mm (| go out.

Regarding the use of capsule 2, it should be said in advance, that according to the prior art for sealing machines, the metallic capsule is coated after sealing and in a subsequent operation is still attached to the bottle neck 4 by cold rolling the casing 25 on a furrow 40, which is attached to the bottle neck 4. This rolling is generally done by placing the bottle 4 in a rotatable device released from the bottle pressing against it itself is moved. The rotating device according to Figure 3 consists essentially of an axially attached part 5 with a Taper 50. The fixed part 5 axially moves a part 51 which is axially movable relative to the fixed part 5 and thus forms one Seat 52 to receive the head of the capsule 2. On the moving Part 51 is attached to a lever 54 at 53, the upper End is connected to a roller 55, which is with the taper 50 of the part 5 is engaged. The lower end of the lever

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3k carries a wheel 56 'whose axis is essentially parallel to the plane axis k . When the bottle k with a capsule 2 is placed in the fastening device, the head 22 of the capsule first enters the opening 52 with a thrust bearing function Lever, the lever 5k itself, the roller 55, the effect of rotating this roller 55 on the tapered surface 50 of the fixed part 5, bringing it against the outside with the effect of pressing the wheel 56 radially correspondingly against the inside whereby the constriction 25 is formed and is caused to unite with the furrow 40 of the bottle k (FIG. 4).

According to the present invention, the method and device are supplemented in the following way: Since the plastic material, which will be discussed below has proven to be not very suitable to be shaped in the prescribed manner, the inventor has successfully considered the envelope to heat at 25, which is then rolled * For this purpose, a warm air stream directed at the envelope 25. The warm one Air flow 6 softens the corresponding envelope 25. On the other hand, the wheel 56 is and is kept so cold that the material, while it is being formed, solidifies and at the same time is pressed strongly adhering to the bottle 4. Of course are

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not all plastic materials are suitable for the capsules, for which the present procedure is applicable. The inventor has found that for this purpose shock-resistant polystyrene with the following characteristics is most suitable:

Values necessary for production: Λ

Requirements for manufacturing:

specific gravity 1.05

apparent specific gravity 0.63

Injection molding shrinkage 0.004

Fluid index (comparison C) 70

Mechanical properties: 4.5 Impact resistance (1.27 x 0.64 cm sample) Tensile strenght: 320 Stretch limit 290 Pressure limit Expansion: 3.5 Stretch limit 28 Pressure limit 420 Flexural strength 2.5 Young's modulus of bending L 82 Hardness Rockwell A

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Thermal properties » Forming» temperature

(264 pel - sample 1.27 x 0.64 cm) Evaporation temperature Vicat 86

L · Various values; Absorption of water 0.12 Index of ray or * color refraction matt

With this material it is useful to obtain capsules that not only represent a seal, but also a fastening element for closures or pouring devices from of the kind as symbolically shown in FIGS. 2 and 5 and in detail in Flg. 7, 8 and 9 are shown. This material is also available uncolored, i.e. transparent. Capsules off transparent material (FIg * 9 and 10) are suitable for that under them legally prescribed fiscal seals 7 can be affixed, which are thereby more protected and also look more aesthetic. Of course, the capsule can also be equipped with an extension beyond the channel 40 be, as in Figs. 2, 3 »4, 9 utid 10, or with one on the other Furrow 4 limited active, as in Figs. 5 and 6.

There are numerous modifications to the subject matter of the invention possible without deviating from the basic principle of the invention.

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For example, local heating of the casing
be varied a lot; as well as that of the bike or such devices. The method described is the best, especially when the capsule has to exert considerable force in order to retain the closure or the pouring device on which not only the heating but also the cooling takes place.

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Claims (1)

- 12 claims 1. Process for the manufacture and application of capsules, the fastening and sealing of closures and Serving bottles, characterized in that a capsule made of plastic, semi-rigid, soft material is made and is pulled on the head of the bottle or on the closure that the envelope of the capsule accordingly the neck of a bottle or near a part of a bottle is heated, and that further by pressing the heated or softened surface against the corresponding one Bottle part and by generating or adding cooling a solidification of the softened or deformed parts in a rigid shape is achieved. 2. A process for the preparation of capsules according to claim 1, characterized in that the capsules are produced by injection molding. 3. The method according to claim 1, characterized in that a semi-rigid plastic material is used for casting the capsules . 109824/1048 2051 & Ä2 The method according to claim 3, characterized in that the plastic mass used to manufacture the capsules consists of impact-resistant polystyrene, preferably of the "580 ¹¹ " type. 5. A method for producing capsules according to claim 1, characterized in that the local heating of the capsule envelope is carried out with a warm air stream. 6. Process for the production of capsules according to Claims 1 to 5, characterized in that the shaping of the capsules, which they press against the corresponding piping part, by means of a heated and / or cooled or otherwise heat-dissipating wheel is carried out. 7 * Capsule as a fastening element for closures and bottles with closures or pouring devices, thereby characterized in that it is produced and used according to claims 1 to 6. 8. Capsule according to claim 5, characterized in that it consists of a single, through • in a line or weak-walled constriction in two parts divided body. 109824/10 L 8 9. Capsule according to claims 5 and 6, characterized marked «that they are made of transparent plastic material * 109824/1048 jb Blank page