JPH03176397A - Deep draw formed rotary type closing member and deep draw processing device for closing head to manufacture rotary type closing member - Google Patents

Abstract

PURPOSE: To detect and select an unsealed bottle rapidly and fully automatically without breaking it by slightly pushing a center region of an upper closure face inwardly in a glass bottle immediately after a closing process is completed. CONSTITUTION: A matrix 8 for a deep drawing apparatus has three notches 10, 11, 12 coaxial with a center axial line 9. A stopper 13 is pushed inwardly in the matrix 8 against force of a compression spring 14. Immediately after the stopper 13 reaches a final position or when it reaches the final position, an upper closure face that is a center region additionally deforms. That is, it is slightly pushed inwardly in a glass bottle. For this reason, a center pressing face 15 slightly protruding from a bottom 16 of the stopper 16 is provided. Thus whether the bottle has been sealed or unsealed can be easily and surely checked.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application 1 The present invention is a rotary closure made of deep-drawn aluminum for glass bottles under internal pressure, which comprises an upper closure surface and a lateral screw. a fully deformed rotary closure member with a threaded surface and optionally a locking ring, with a sealing element mounted on the inside of the upper closure surface, in particular near the transition to the lateral threaded surface; However, the present invention relates to a type in which the sealing member seals along the closed surface of the glass bottle.

Furthermore, the invention provides a deep drawing device for a closure head for producing rotary closures made of aluminum for glass bottles under internal pressure, which is provided with a master die that is attached to the blank from above, This matrix has a plurality of coaxial notches that decrease in size from the outside to the inside, and the first of these notches rotates from the outside to the inside. a second cutout having a constant diameter, the second cutout being progressively reduced in size until substantially equal to the maximum outer diameter of the closure member;
A third notch, which follows the notch, has a smaller diameter than this second notch and serves to deep-draw the material up to the lateral closure surface of the glass bottle, allowing the compression spring to A stopper (opposed bearing) that is pushed into the mother die against force is movably held in the third notch. ] Deep-drawn rotary closures are known which have an upper closure surface that is always curved upwards. The upper closing surface of this closure member usually does not curve slightly after the closing process. After this, the bottle bends significantly under the influence of internal pressure inside the bottle. However, such changes in the degree of curvature
This occurs only if the glass bottle is closed without any problems by the rotary closure and remains undamaged. This is because effective internal pressure can only be created in such a glass bottle. The predetermined shape change thus serves as an indicator for the normal and filling condition of the glass bottle, ie for the closed condition of the glass bottle.

It is therefore usually attempted to detect the deformation of the upper closing surface of the closure member by measuring methods in order to check the condition of the glass bottle. However, such measurements involve different difficulties. Naturally, it is possible that the rotary closure member, or its upper closure surface, may be exposed to the surface of the mouthpiece frame. However, in this case no difference is actually measured.

Therefore, rather only the central region of the upper closed surface is suitable for measurements. However, even in this central range, sufficiently clear differences are often not measured. This is because the central region P-curves only progressively (toward the outside), and such a deformation can of course be used as a basic condition for reliable measurements, even in the case of slight manufacturing or closing tolerances. That's because it doesn't work.

Furthermore, due to the curvature of the upper closing surface of the rotary closing member,
Even though a glass bottle is considered to be under no pressure, it is actually under internal pressure and vice versa. In other words, conventional measurements for checking the condition of glass bottles have to be carried out with great precision and are therefore very expensive.

However, despite this, no reliable results are obtained.

The measurements of shape changes mentioned above are limited to relatively large diameter rotary closures, closures known in practice as so-called screw-on closures. Rotating closure members of relatively small diameter, ie less than 35 mm, have only limited measured deformation. This means that such rotary closure members are excluded from the actual measuring operation and are not measured. Therefore, small-diameter glass bottles that are closed by such small-diameter closures are currently available in large quantities (100 per year in the Federal Republic of Germany alone).
billion units, 3005 tons (ml) per year throughout Europe
They are removed from the filling station without being checked. Such glass bottles are only considered to be sealed, or are tested for tightness on a random basis (eg, 1-2 per 100,000 or per hour).

In the latter case, the rotary closure member is then punctured to remove the gas from the bottle. In this case, the rotary closure element is unavoidably damaged or broken. Considering the defective layer rate of 1 bottle per 10,000 bottles estimated in this way, checking the tightness of the bottles is extremely uncertain and inadequate. Moreover, such a check can lead to damage to the rotary closure member.

[Problem to be Solved by the Invention 1] The object of the present invention is to provide a rotary closing member of the type mentioned in the introduction, which allows the sealing to be easily and reliably checked even if the diameter is less than 35+ m. In addition, all adverse events that give rise to non-occlusions, such as loosening or damage to the backing and damage to the bottle opening, are detected reliably before or during filling, closing and, if appropriate, pasteurization, etc. It's about doing.

In particular, the aim is to detect and sort out unsealed bottles quickly and fully automatically and without breakage, at a speed consistent with current filling efficiencies of 100,000 bottles per hour. The result is a general and permanent check of quality without reducing productivity.

[Means for Solving the Problems] According to the present invention, in the rotary closing member of the type mentioned at the beginning, the central area of the upper closing surface is connected to the interior of the glass bottle (the upper closing surface) immediately after the end of the closing process. This central area can then be pushed outward (above the upper closing surface) by the subsequent action of sufficient internal pressure. This problem is solved by

Furthermore, according to the invention, in a deep drawing device of the type mentioned in the introduction for a closing head for producing a rotary closing member, the stop has a central pressing surface, which central pressing surface is This problem is solved by slightly protruding from the bottom surface of the stopper and being coaxial with the central axis of the mother mold. In this case, the central pressing surface may be designed substantially flat like the other bottom surface, but it may also be in particular truncated-conical.

[Advantageous Effects of the Invention 1] In contrast to conventional rotary closures, the upper closing surface of the rotary closure of the present invention, i.e. the central area of this surface, does not point towards the outside in the starting condition of the glass bottle under internal pressure. It curves towards the inside of the glass bottle. Initially deformed in this way, the upper closing surface deforms significantly when internal pressure builds up inside the bottle, so that its deformation can be easily and reliably measured. In this case, the upper closing surface normally curves in the opposite direction to the so-called O position (the height of the upper closing surface of the bottle) and then curves strongly again above this O position.

Such deformations are measured more favorably than the deformations described above that occur in relatively large diameter rotating closure members.

This is because deformations going in the same direction do not have to be measured with slight differences, and so-called deformations going in the opposite direction can be measured with larger movements as additional measurement marks. As a result, the condition of the bottle can be easily and reliably checked.

For rotary closures of small diameter, i.e. less than 35 mm, for example closures used for bottles for beverages with a high carbonation content, in particular bottles for mineral water or lemonade, the arrangement according to the invention is suitable. is important. Because only through measurable deformation according to the invention,
This is because bottles that are not sealed can now be detected and sorted. In this case, the closure element according to the invention can be reliably and quickly measured for deformation. As a result, the condition of the bottle is determined fully automatically during the bottle filling or closing process.

Now, the rotary closure member according to the invention is manufactured by deforming the material during the closure process. Advantageously, however, after the blank has been placed on the bottle opening, first the upper closing surface is pushed into the interior of the bottle, then the blank is deep-drawn, and finally the threaded surface is formed by basting and rolling. It is formed. In this case, the deformation surface of the material does not have sharp, rugged transitions, and the upper closing surface has sufficient movement capacity.

With respect to the material produced in this way, it is not possible to form the rotary closure element according to the invention with a material that has previously been suitably deformed. Usually, constant predeformation can only be carried out by special deformation means, such as for example indentation deformation methods. Moreover, the movement capacity that is subsequently required to measure the condition of the bottle is limited by such deformation means.

Furthermore, the above-mentioned forward deformation makes it difficult to install sealing members, especially (flat) sealing discs. Furthermore, problems arise with regard to centering of the sealing member. That is, when forward deformation is performed, the sealing member is not reliably centered, and the apex of the sealing member located at the deepest point is shifted from the center of the opening of the bottle.

However, the apex of the sealing member at the center of the opening is a necessary location for later measurements.

According to a configuration of the invention, the central area of the upper closing surface is pushed into the interior of the glass bottle (downwards) by at least 0.4 mm (of the upper closing surface) after the closing step and by the same amount in the opposite direction. It can only be transformed.

Such variants of the central range are especially suitable for 30-351111
This is true for a rotary closure member with a diameter of 1. The indentation depth to be selected also depends on the material strength and the desired internal pressure. What is even more important is how quickly and accurately the condition of the bottle is to be measured, so that the production rate of the bottle is the effect 7 actor. According to an advantageous configuration of the invention, the upper closing surface After the closing process, the central area of the glass bottle is pushed into the interior of the vial (of the upper closing surface) by approximately 0.7+xm (downwards), so that it can be deformed by the same amount in the opposite direction.

By the way, in the deep drawing device for manufacturing the rotary closure member according to the present invention, as described above, the stopper in the mother mold is provided with a central pressing surface. This central pressure surface projects at least 0.4 myr from the bottom surface of the stop, but advantageously about 0.7+III! It stands out.

According to a further advantageous embodiment of the invention, the ratio of the diameter of the central pressure surface to the diameter of the entire bottom surface of the stop is at least l:
2. As a result, the upper closing surface of the closing member is not deformed partially but over a large area.

[Example 1 The invention will now be explained with reference to the illustrated embodiment.

According to FIGS. 1 and 2, a rotary closure member made of deep-drawn aluminum is fitted over the opening of a glass bottle, which has an upper closure surface 1, a lateral closure surface 2, and an external thread 3. There is.

The rotary closing member includes an upper closing surface 4, a side threaded surface 5, a fixing ring (not shown), and a sealing member 6.
It has The material and the sealing member 6 are the side closing surface 2
When the top is deep drawn and the side thread surface 5 is bottom-shaped by basting rolling, that is, the closing process is completed,
The upper closing surface 4, more precisely the central region 7, of the rotary closing member is directed towards the interior of the vial, i.e. the upper closing surface l.
It is pushed slightly downward. Such a state is usually an unstable state that must be created only at the beginning.

As soon as the glass bottle is closed and a large internal pressure acts regularly inside the bottle, for example after a certain time due to the release of molten gas, and in particular during heating, the upper closing surface 4, i.e. the central area 7, moves as the O position. Lifted beyond the plane of the upper closing surface l shown and deformed in the opposite direction to the initial one, such a deformation, shown in solid lines in FIG. 2, can almost certainly be detected visually. However, in all cases it can be easily and reliably detected metrologically.

However, such a deformed state can only be obtained with undamaged glass bottles and tight closures, or with sufficient gas content.

Therefore, the deformed state described above serves as a marker of the normal state. 1 Therefore, it must be obtained without fail and must be maintained until the product is consumed.

However, if the vial and the rotary closure are damaged or if they subsequently leak, the central region 7 of the upper closure surface 4 will return to its original shape from the above-mentioned shape, i.e. the outwardly curved shape. is returned to its shape. Immediately after the bottle filling or closing process and possibly the pasteurization process,
That is, if a pressure loss still occurs at the manufacturer's site, the central region 7 is fully deformed and this is reliably detected. However, only later, ie if the bottle leaks at the dealer and the consumer, the central area 7 partially returns to approximately the O position and deforms. This position is shown in dashed lines in FIG.

In FIG. 3, the basic structure of a deep drawing device according to the invention for a closing head for producing the rotary closing member is shown. As can be seen from this figure, the master mold 8 of the deep drawing device has three notches lO, Il, +2 coaxial with the central axis 9. The first of these cutouts 10 tapers gradually from the outside towards the inside until it is approximately equal to the maximum outer diameter of the rotary closure member. A second notch 11 following this notch IO has a constant diameter. Furthermore, a third notch 12 following this notch 11 has a smaller diameter than the notch 11 and serves for deep drawing of the material up to the lateral closing surface 2. Further, a stopper 13 is movably held within the third notch 12. In other words, the stopper 13 is pushed into the mother mold 8 against the force of the compression spring 14. This state is shown in the left half of FIG. 3 and is the state obtained after deep drawing. Furthermore, the stopper 13 shown in the left half is pushed in by a predetermined deep drawing depth (for example, 2.6 mm) with respect to the starting position shown in the right half.

Immediately before or when the stop 13 assumes its final position, the upper closing surface 4 and thus the central region 7 are additionally deformed. That is, it is pushed slightly towards the inside of the glass bottle. For this purpose, a central pressure surface 15 is provided which slightly projects from the bottom surface 16 of the stop 13. Moreover, this central pressing surface 15 is provided coaxially with respect to the central axis 9, and is formed in a substantially truncated conical shape. Moreover, the ratio of the diameter of the central pressing surface 15 and the diameter of the bottom surface 16 is
At least l:2, so that the rotary closure member can be deformed over a large area.

The rotary closure member manufactured (molded) in this way is
It is possible to easily and reliably check whether the device is in a sealed or non-sealed state. The variants to be considered for such checks are also particularly suitable for fully automatic checks on filled bottles.

[Brief explanation of drawings]

The drawings show an embodiment of a rotary closure member and a deep drawing device according to the present invention; FIG. 1 is a sectional view of the rotary closure member at the opening of the bottle immediately after the closing process; FIG. is a cross-sectional view of the rotary closure member under internal pressure (solid line) and in a later pressure drop state (dashed line) at a later point in time than in Figure 1; Figure 3 shows the top of the rotary closure member; FIG. 3 is a cross-sectional view of the deep drawing device and the opening of the glass bottle, with the right half showing the start of deformation of the closing surface and the left half showing the end of the deformation. l... Upper closing surface, 2... Lateral closing surface, 3... Male thread, 4... Upper closing surface, 5... Lateral threaded surface, 6
... Seal member, 7... Central range, 8... Mother mold,
9... Central axis line, 10.11.12... Notch, 1
3... Stopper, 14... Compression spring, 15... Center pressing surface, 16... Bottom surface

Claims (1)

[Claims] 1. A rotary closing member made of deep-drawn aluminum for glass bottles under internal pressure, comprising an upper closing surface, a lateral threaded surface and optionally a fixing ring. and a sealing member is attached to the inside of the upper closing surface, and the completely deformed rotary closing member is sealed along the opening edge of the glass bottle by this sealing member. , the central region (7) of the upper closing surface (4) can be pushed and deformed slightly towards the interior of the glass bottle (below the upper opening edge (1)) immediately after the end of the closing process. Furthermore, this central range (7)
deep-drawn rotary closure member, characterized in that it is extruded towards the outside (above the upper opening edge (1)) by the subsequent action of sufficient internal pressure. . 2. The central area (7) of the upper closing surface (4) towards the interior of the glass bottle (of the upper opening edge (1)) after the closing process
Claim 1: It is pushed in at least 0.4 mm (downward) and can be deformed by the same amount in the opposite direction.
Rotary closure member as described. 3. The central area (7) of the upper closing surface (4) towards the interior of the glass bottle (of the upper opening edge (1)) after the closing process
3. A rotary closure member according to claim 1 or claim 2, wherein the rotary closure member is adapted to be depressed (downwards) by approximately 0.7 mm and deformed by the same amount in the opposite direction. 4. A deep drawing machine for a closing head for producing a rotating aluminum closure for glass bottles under internal pressure, which is equipped with a matrix that is attached to the material from above; has a plurality of coaxial notches that decrease in size from the outside to the inside, and the first of these notches is used to open the rotary closure member from the outside to the inside. a diameter that gradually decreases until approximately equal to the maximum outer diameter of the first notch; a second notch that follows the first notch has a constant diameter and a second notch that follows the first notch; A third cutout has a smaller diameter than this second cutout and serves to deep draw the material up to the side opening edge of the vial, resisting the force of the compression spring. In the type in which a stopper that is pushed into the inside of the mother die is movably held in the third notch, the stopper (13) has a central pressing surface (15), This central pressing surface (15) slightly protrudes from the bottom surface (16) of the stopper (13), and
Deep drawing device for a closing head for producing a rotary closing member, characterized in that it is arranged coaxially with respect to the central axis (9) of a rotary closing member. 5. The center pressing surface (15) is connected to the bottom surface (13) of the stopper (13).
5. The rotatable closure member of claim 4, wherein the rotary closure member projects at least 0.4 mm from 16). 6. The center pressing surface (15) touches the bottom surface (13) of the stopper (13).
16), protruding by about 0.7 mm from
Rotary closure member as described. 7. According to any one of claims 4 to 6, the ratio of the diameter of the central pressing surface (15) to the overall diameter of the bottom surface (16) of the stopper (13) is at least 1:2. Rotating closure member.