EA010245B1 - Receptacle comprising a lid - Google Patents

Abstract

Disclosed are a top shell (1) or bottom shell (2) made from a deep-drawn molded plastic part as well as a receptacle which is composed of the two joined shells. The invention further relates to a method and a device for producing a top shell or bottom shell (1, 2). The aim of the invention is to create a first and a second shell (1, 2) which can be produced inexpensively as a disposable item while allowing the same to be locked together in a fixed but easily removable manner by joining the two shells together so as to create a largely tight receptacle. Said aim is achieved, among other things, by embodying a reducing collar (5) between the holding edge (4) and the pot-type central part (3) on the top shell (1) while disposing at least two identically pitched threads (7a, 7b, 7c, 7d, 7e, 7f) on the inner face (6) of the holding edge (4). The reducing collar (5) delimits the at least two threads (7a, 7b, 7c, 7d, 7e, 7f) on one side while said at least two threads (7a, 7b, 7c, 7d, 7e, 7f) are provided with an open thread inlet (48).

Description

The invention relates to a closing bowl and a bottom bowl from a shaped part made of a polymer material obtained by deep drawing, as well as a container assembled from two bowls. The invention also includes a method and apparatus for manufacturing a closing and bottom bowl.

From the combination of the first bowl, for example, the closing bowl, and the second bowl, for example the bottom bowl, a container is assembled, in which, in the assembled state, the first bowl externally acts on the second bowl, the second bowl being made with the round edge of the hole, and in which the first bowl acts as its holding edge over the second bowl. Such containers are used to store and transport small items of any kind, in particular, even food products, such as young cheese, yogurt and the like, and in the latter case, salads that are seasoned or which still have to be seasoned. Another type of container made by injection molding is disclosed in I8 5638976. The injection molding method has the advantage that containers with a wide variety of options with respect to their geometry can be manufactured. The disadvantage of this manufacturing method is the relatively high cost per unit of production.

Since containers are usually disposed of after use of the contents, only particularly economically manufactured containers that are made of thermoplastic material by deep drawing are taken into account for this purpose.

A container made of a deep drawn polymer material with two halves screwed together is described in I8 3322262. For screwing, the first half with an external thread and the second half with an internal thread are provided. Such a constructive solution with two threaded to each other threads can be performed only with high technological costs. In addition, the tightness of such screw-on containers is realized only by means of a threaded connection, which, with unavoidable manufacturing tolerances during the deep drawing process, leads to significant leaks. This, in particular, is unacceptable when packaging food products.

Traditional reclosable containers, for example for yogurt, with the simplest and most inexpensive closing and fixing means, have a bottom bowl with a corresponding closing bowl, and the closing bowl in the region of the opening edge has a so-called closing apron with locking elements that cover the bottom of the bowl. When the container is opened, the closing apron rises above the edge of the hole. To do this, the closing apron must be covered from the bottom, and the snap-lock device must be released to allow the cover to be removed. This is not only inconvenient, but there is a risk of fingers contacting the contents of the container.

Based on this, the invention is based on the task of providing the first and second cups, which, on the one hand, can be economically manufactured as disposable products, and, on the other hand, by means of assembly, provide a rigid but easily removable fixation for a substantially tight container .

Another separate task is to create a method and device for manufacturing the first bowl.

The problem according to the invention is solved by means of a first bowl, for example a closing bowl, on which fastening means for making a threaded connection are located, wherein the fastening means comprises a transitional belt formed between the retaining edge and made in the form of a cap and at least two retaining belts located on the inner side of the retaining edges with the same rise of the thread, and the transitional belt limits on the one hand these at least two threads, and these at least two thread turns respectively have an open thread entry.

Each thread turn is limited by the transitional belt like a flange so that in the region of transition from the thread turn to the transitional belt an acute converging wedge-shaped gap is formed in which the elements of the second bowl interacting with the thread turn are clamped. For this, the circumferential transition zone is made of constant width. Such a clamping fastening is especially favorable for polymer shaped parts made by deep drawing.

Preferably, the respective threads are respectively diametrically opposed. As a result of this, in the case of also diametrically opposed mating elements of the second bowl, for example holding wings, there is a clamping action distributed evenly along the edge of the hole, which is associated with a uniformly distributed clamping force of the closing bowl on the bottom bowl. This in turn leads to an increase in tightness, even over a longer period of use.

Preferably, the threads have a rise of 5 to 30 °. Fundamentally, even if any elevation of the threads can be realized, then in the above region there is a relatively small structural height of the retaining edge with a slight rotational movement to separate the first and second bowls.

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It has also proved favorable to provide the first bowl with a seal. Sealing can be performed, for example, in the form of a concentric circumferential sealing cone on the lower side of the first bowl between the central part made in the form of a cap and the transitional belt. In the case of assembled first and second cups, the sealing cone is supported in the direction of the second cup to its transition area from the edge of the hole to the inner wall and thereby creates a sealing effect. Alternatively, you can discard the circumferential sealing cone and instead weld a sealed film to the edge of the hole.

The second bowl has a side wall similar to the wall of the glass, which, at its upper section, is made with a round edge of the hole and is firmly closed by the bottom plate in its lower section. In accordance with the invention, fastening means for making a threaded connection are arranged on the second bowl, the fastening means including at least two openings of the rigid holding wings radially protruding at a circular edge. The concept is rigidly understood as rigidity, which allows the functionally correct opening and closing of the second bowl without elastic or plastic deformation of the retaining wings.

The retaining wings of the second bowl interact with the threads of the first bowl so that the holding wings in the assembled state of the cups enter the threads, and the first and second cups are mutually guided. A significant advantage with respect to the aforementioned threaded joints is that in the second bowl it is possible to dispense with the complex mating thread of the first thread bowl, thereby substantially reducing manufacturing costs.

The retaining wings should be diametrically opposed around the edge of the hole. Due to this, together with the retaining wings evenly distributed in the circumferential direction, contact pressure between the first and second cups evenly distributed around the edge of the hole is achieved. This results in good sealing and prevents inadvertent separation of the closing bowl from the bottom of the bowl.

With respect to the geometry of the retaining wings, a large number of embodiments are possible. In a preferred embodiment, the holding wings have a leading edge and a trailing edge radially extending relative to the second bowl, which are connected to each other by an outer edge concentrically curved relative to the second bowl.

As an alternative to the above embodiment, the holding wings may have a leading edge radially extending from the second bowl and a convexly curved trailing edge.

It has also proved favorable if the retaining wings are formed from a square or multifaceted retaining surface protruding beyond the edge of the hole.

In another preferred embodiment, the holding wings may be formed as holding cams.

Another separate objective of the invention is solved by means of the container with the first bowl that can be resealed and with the second bowl that can be attached to it, in which a transitional belt is formed between the retaining edge and the central part made in the form of a cap and in which the first and second cups are made with the possibility of screwing together with a threaded connection, and the threaded connection includes on the first bowl on the inner side of the retaining edge at least at least two turns of thread with the same elevation, which are bounded on one side by a transitional belt and accordingly have an open thread inlet, and on the second bowl at least two retaining wings extending radially protruding from the round edge of the hole.

The combination of the first bowl with the second bowl results in a largely sealed container. In response to the at least two threads of the structural element described above, these threads include a radially protruding holding wing located on the second bowl.

Preferably, the number of retaining wings is less than or equal to the number of threads. This facilitates the connection of the first and second bowls without causing interference from the retaining wings without a corresponding thread turn and without reverse bias during make-up.

Most preferably, at least two turns of thread in the circumferential direction of the retaining edge are wider than the retaining wings. As a result of this, in particular, in the input region of the thread turns, it is possible to precisely insert the retaining wings into the corresponding thread turn.

The first bowl in the region of the retaining edge and between opposing threads may have a nominal diameter that is slightly larger than the diameter of the full circle of the retaining wings.

It may also be advantageous if the first bowl in the region between the spiral teeth of the thread turns has an inner diameter that is slightly larger than the outer diameter of the edge of the hole.

By means of a larger retaining edge with respect to the hole in the inner diameter,

- 2 010245 it is possible to cover the top of the second bowl with the first bowl. Only in the area of the threads, is it, in the case of approximately the same wall thickness, visible from the outside. This expansion of the inner diameter is consistent with the size of the retaining wings in such a way that the retaining wings are installed in the thread along its entire length. The inner diameter in the area of the thread turns should be selected only slightly larger than the diameter of the full circle of the retaining wings in order to withstand as much as possible overlap between the side surface of the corresponding thread and the retaining wing installed in it.

Another separate problem is solved using the deep drawing method, using a molding tool with a retention sleeve that is not rotatable and rotatable with a threaded sleeve that can be rotated in a circumferential direction relative to the retention sleeve, in which the film is moved in the initial position of the retention sleeve and the threaded sleeve through the molding tool, then install this film to form the first bowl in the molding tool, clamp it and form, threaded the sleeve is twisted into the final position and the bowl is removed from the holding sleeve.

In the case of the method according to the invention, it is exclusively a molding process for manufacturing a bowl with a thread located on it, for example, a closing bowl. After positioning the film in the forming tool, the film is preferably loaded with compressed air from its upper side and pressed against the forming tool. In this technological operation, a bowl with thread turns is formed. To separate the bowl from the molding tool, in particular from the contours of the threads, a threaded sleeve is twisted. This means a process comparable to a nut and a bolt, with the first bowl playing the role of the nut and the threaded sleeve as the bolt. By unscrewing the bolt from the nut or, respectively, the threaded sleeve from the first bowl, the threaded sleeve comes out of contact with the first bowl and thereby releases it so that the first bowl can be separated upward from the molding tool.

In a preferred embodiment of the method, the bowl is held by a holding sleeve and / or film during twisting. In principle, it is possible to fix the first bowl during unscrewing solely due to the film, thereby preventing rotation of the bowl together with the threaded sleeve. However, in particular, in the case of soft or thin materials, this is problematic, since the film cannot absorb the forces arising during twisting and leads to deformation of the first bowl. For this reason, it is preferable to additionally hold the first bowl also, at least with a holding sleeve.

In the above method, the bowl may be removed with the film from the holding sleeve. At the next stage, the film equipped with the first bowls squeezed out in it is fed to the next conventional punching machine, on which the bowls are cut from the film.

However, the transportation of the film to a spatially remote punching machine leads to further cooling of the film and the first cups already molded therein, so that the cutting is not carried out concentrically around the intended shape of the first cup, but with an offset relative to it. This drawback comes to the fore especially with materials with high shrinkage of the material, for example, polypropylene (PP). The PP material has an irregular shrinkage of about 2% upon cooling. Less critical is time-cutting in the case of polystyrene (P8), which is calculated to shrink by a maximum of 0.5%.

Therefore, for materials with strong shrinkage, it is favorable if the first bowl is cut out of the film directly on the molding tool after unscrewing the threaded sleeve. This greatly reduces rejects, since it is now possible to precisely align the bowl with the punching tool and there is no intermediate transportation from the forming tool to the punching tool.

Qualitatively, even more accurate concentric molding is achieved if the bowl on the molding tool is already cut out of the film before unscrewing the threaded sleeve. In this case, the first bowl, since it is already separated from the film before twisting, can only be fixed due to the holding sleeve from joint rotation with the threaded sleeve. For this, the holding sleeve is provided with a geometric structure, which, after the molding process, is responsively formed in the first bowl and ensures the transmission of force with a geometric closure.

Since the first bowl is completely separated from the film, we are talking about a method of figured cutting.

As an alternative to the foregoing, it turned out to be favorable to cut the first bowl only partially from the film and leave the residual jumpers between the film and the bowl. In the case of this method, we are talking about cutting with steel tape. At the same time, the forces are perceived at least partially while the film is being unscrewed, and very precise concentric parts are still made. Residual jumpers are broken at the next stacking stage. A significant advantage is the low cost of production compared to curly cutting. The disadvantage compared to figure cutting is the possibly remaining, not completely broken off residual jumpers with dangerous cutting edges.

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The third separate problem is solved by means of a molding tool for manufacturing the first bowl with a stationary holding sleeve and rotatable in a circumferential direction relative to the holding sleeve from the initial position to the final position of the threaded sleeve, and contours (profiles) are formed in the threaded sleeve to form at least two turns of thread.

Preferably, an inner punch is located centrally inside the holding sleeve. The inner punch serves to mold the inner central part in the form of a cap and in a preferred embodiment it can be made with the possibility of movement in the axial direction separately or together with the holding sleeve. Due to this possibility of movement after unscrewing the threaded sleeve, it is possible to lift and move the first bowl relative to the molding tool.

Preferably, the threaded sleeve is arranged concentrically around the holding sleeve so that when unscrewing, the threaded sleeve rotates symmetrically around the holding sleeve. In this case, the holding sleeve should be inside, and the threaded sleeve should be outside.

In a preferred embodiment, the holding sleeve has an inclined wall portion on which the holding ribs are located. Moreover, depending on the angle of the inclined section of the wall, the holding ribs can be oriented in the axial or radial direction of the holding sleeve. In any case, the holding ribs should be located as perpendicular as possible with respect to the direction of rotation of the threaded sleeve so that the torque acting on the bowl due to the rotational movement of the threaded sleeve is sensed by the holding ribs.

For a neat molding process, it is sufficient if there is a holding device around the threaded sleeve, with which the film can be clamped on the outside of the molding tool and thereby be fixed. The holding device may include, for example, a stationary punching counter support and a holding plate configured to lower.

If the forming tool should be used for figure cutting or cutting with steel tape, instead of a holding device around the threaded sleeve, a device for holding and cutting can be located around the threaded sleeve.

Figure cutting can be particularly preferably carried out by means of a holding and punching device that includes a separating plate adapted to lower the knife plate and a stationary knife bush concentrically surrounding the threaded sleeve, the separating plate and knife plate being vertically movable. Preferably, the knife sleeve is located between the threaded sleeve and the separating plate.

With the help of the knife plate made with the possibility of lowering, the film, after it is moved through the molding tool, is clamped between the knife plate. At the end of the molding process and after unscrewing the threaded sleeve, it moves up, and the film is cut off with a knife plate. It is especially advantageous if, during the movement of the film, the knife sleeve protrudes slightly relative to the separating plate so that a ledge is formed in the film at the place of transition of the separating plate to the knife sleeve, which serves as a seal during the molding process.

Since the molding process must be supplemented by cutting with a steel tape, the device for holding and cutting down may include a stationary punching counter, made with the possibility of lowering the holding plate and made with the possibility of lowering a knife in the form of a steel tape onto the punching counter-support. By a knife in the form of a steel tape is meant a steel tape sharpened on one or both sides, which is annularly closed in the circumferential direction and is made with a recess on its sharpened lower side to form residual jumpers. In this case, the holding plate for holding the film and the knife in the form of a steel tape are two structural parts that are separated from each other, so that a worn knife in the form of a steel tape can be easily replaced separately. As a result, particularly low production costs become possible.

It is particularly preferred that openings for removing air are located on the holding sleeve. During deep drawing, the molding tool is usually loaded from above with compressed air so that the film adheres to the shaping tool and takes the shape of a bowl. This fit is supported by vents. It is also possible to attach a vacuum wire to the air vents and suck the film to the shaping tool.

In a particularly favorable embodiment of the invention, the threaded sleeve between the initial and final position during the extraction from the mold passes a distance of 10 to 25% of its circumference or peripheral circumference.

The invention is further explained in more detail on the basis of 14 figures, which show:

FIG. 1 is an external and perspective view of the first bowl as a closing bowl with a circumferential

- 4 010245 by the filling cone;

FIG. 2 is a side view of the first bowl of FIG. one;

FIG. 3 is a cross section of the first bowl according to FIG. one;

FIG. 4 is an enlarged partially cross-section of the retaining edge, transition belt, sealing cone and made in the form of a cap the Central part of the first bowl as a closing bowl;

FIG. 5 is an external and perspective view of a first bowl as a closing bowl without a sealing cone;

FIG. 6 is an external and perspective view of a first bowl as a closing bowl with a corrugated structure located exclusively inside;

FIG. 7 is an external and perspective view of a second bowl as a bottom bowl with symmetrically formed retaining wings;

FIG. 8 is a plan view of the second bowl of FIG. 7;

FIG. 9 is a side view of the second bowl of FIG. 7;

FIG. 10 is a top view of a second bowl as a bottom bowl with asymmetrically formed retaining wings;

FIG. 11a-c is a partial cross-sectional view of a molding tool in various functional positions;

FIG. 12a-c is a partial cross-sectional view of a molding tool in various functional positions for curly cutting;

FIG. 13 is a partial top view of the molding tool of FIG. 12;

FIG. 14a — a partial cross-sectional view of a molding tool in various functional positions for cutting with steel tape.

FIG. 1 shows the first bowl in the form of a closing bowl 1. The closing bowl 1 has a central part 3 convexly curved outwardly in the form of a cap, the peripheral wall 29 of which passes into the holding edge 4. Between the central part 3 made in the form of a cap and the holding edge 4 there is a in the form of a step, a transitional belt 5. The peripheral wall 29 is provided with a corrugated structure 30, which also protrudes on the inner side 29a (see Fig. 4).

The holding edge 4 is provided with fixing means 47 in the form of a total of four turns 7a, 7b, 7c, 7th, threads, the contours of which are made both on the inner side 6a (see Fig. 3), and on the outer side 6b of the holding edge 4. By means of the turns 7a, 7b, 7c, 7th thread, for example, a second bowl made in the form of a bottom bowl 2 can be attached to the closing bowl 1 (see Fig. 7).

In addition, the retaining edge 4 is surrounded on the outside by a circumferential groove obtained by the edge 49. It has a larger diameter than the closure bowl 1, since it is cut from the film 23 during manufacture, for example, using the one shown in more detail in FIG. 12 of the device 43 for holding and cutting, and the device 43 for holding and cutting like a sleeve surrounds the closure bowl 1.

In the side view of FIG. 2 you can see, in particular, the progress of the threads 7a, 7b, 7th of the thread. The thread turn 7c is not shown in this view, since it is on the back of the closing bowl 1. Four threads 7a, 7b, 7c, 7th of the thread protrude outward and are separated from each other by means of spiral teeth 17a, 17b, 17c, 17y. Spiral teeth 17a, 17b, 17c, 17th protrude inwardly on the inner side 6a (see Fig. 3) of the retaining edge 4 and form a working surface for the elements of the bottom bowl 2 made in return. Said elements can be formed, for example, in the form of holding wings 11a, 11b, 11c, 11th according to FIG. 5.

On the input side 31 of each thread turn 7a, 7b, 7c, 7th, respectively, there is a thread input 48, which expands funnel-shaped towards the front side 31 to provide easier reception, for example, of the retaining wing 11a, 11b, 11e, 11th. Moreover, the spiral teeth 17a, 17b, 17c, 17y located in the direction of rotation are respectively rounded on the front side 31.

All turns 7a, 7b, 7c, 7th of the thread go at an acute angle, at 45 °, into the transitional belt 5. This area is the clamping region 32, in which, in the assembled state of the closing and bottom cups 1, 2, for example, holding wings 11a, 11b, 11e, 11th with its leading edge 12 (see Figs. 7-10).

FIG. 3 shows, in the cross section passing through the center of the round closing bowl 1, the progress and dimensions of the threads 7a, 7b, 7c, 7y, threads, as well as the location of the seal 8 formed in the form of a sealing cone 8a.

The inner diameter 18 of the retaining edge 4 is set by the distance in the light between two opposite spiral teeth 17a, 17b, 17c, 17y. In FIG. 3, the inner diameter 18 is given by the distance between the spiral teeth 17b, 17th. The diameter in the light between the two opposite turns 7a, 7b, 7c, 7y of the thread is indicated as the nominal diameter 15 of the retaining edge 4. In FIG. 3 you can see the nominal diameter 15, for example, between the turns 7b, 7th of the thread. A nominal diameter of 15 is always greater than an inner diameter of 18.

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Between the transitional belt 5 and the peripheral wall 29 made in the form of a cap of the central part 3. a sealing cone 8a protruding in the direction of the lower side 9 is visible, which passes closed around the central part 3 made in the form of a cap. In the assembled state, the closing bowl 1 and the bottom bowl 2 the sealing cone 8a adjoins from the inside to the edge 10 of the hole (Fig. 7, 9) and, accordingly, to the upper section 34a (Fig. 9) of the side wall 33 of the bottom bowl 2 and, as a result, carries out sealing.

FIG. 4 shows on an enlarged scale the region around the retaining edge 4, respectively, of the sectional plane of FIG. 3. The thread turn 7a shown here has an open to the inner side 6a and otherwise substantially rectangular profile.

The transition belt 5 extends horizontally and at the same time is located essentially perpendicular to the upper section 34a of the side wall 33 (see Fig. 9). Between the transitional belt 5 and the peripheral wall 29 there is a sealing cone 8a, which in the shown embodiment protrudes downward behind the clamping region 32.

In FIG. 5 shows the closure cup 1 without the circumferential sealing cone 8a. This embodiment is provided for the bottom bowl 2, the edge 10 of the opening of which should be closed with a sealed film. The sealing cone 8a, which, in the assembled state of the closing bowl 1 and the bottom bowl 2, protrudes below the edge 10 of the opening of the bottom bowl 2 (see Fig. 7), would tear the sealed film stretched on the edge 10 of the hole and therefore is not suitable for such an embodiment.

Moreover, shown in FIG. 5, the execution of the closing bowl 1 has a total of six turns 7a, 7b, 7c, 76. 7e, 71 threads that are evenly distributed on the inner side 6a (see Fig. 3). A similar closure cup 1 can also be screwed onto an unshown bottom cup 2 with six retaining wings 11a, 11b, 11e, 116.

FIG. 6 shows another embodiment of a closure cup 1 with a cylindrical peripheral wall 29 perpendicular to the transition zone 5. For better presentation, the central part 3 made in the form of a cap is shown without a central closure element. On the inner side 29a of the peripheral wall 29 there is a toothed rim in the form of a corrugated structure 30. The corrugated structure 30 does not pass through the peripheral wall 29. On the contrary, the outer side 29b of the peripheral wall 29 has a smooth surface. Due to the axially oriented closing cup 1 of the corrugated structure 30, it is possible during the manufacturing process through this corrugated structure 30 to sense the torques acting on the closing cup 1 in the circumferential direction and to receive the forming tool 20 that has been reciprocally executed.

In FIG. 7, a bottom bowl 2 is shown as a second bowl, with slightly conically diverging, but substantially cylindrical side wall 33, which at its upper portion 34a passes into the edge 10 of the hole. The lower portion 34b of the side wall 33 passes into a strongly conically converging base region 35. On the lower side, the bottom bowl 2 is closed on one side by the bottom plate 36.

The edge 10 of the opening of the second bowl has fastening means 47 in the form of a total of four retaining wings 11a, 11b, 11e, 116 uniformly protruding outwardly. These holding wings 11a, 11b, 11e, 116 may be included in the respective turns 7a, 7b, 7c, 76, 7e, 71 threads, as shown in FIG. 1-6, and by means of a pivoting movement between the closing bowl 1 and the bottom bowl 2 can be fixed in the coils 7a, 7b, 7c, 76, 7e, 71 of the thread. The fixation is carried out by the retaining wings 11a, 11b, 11e, 116, in the case of the commonly used right-hand thread on their leading edge 12.

The holding wings 11a, 11b, 11e, 116 are located relative to each other in the same plane and end flat at the top with the edge 10 of the hole.

The distance from the outer edge 14 of the holding wing 11b to the outer edge 14 of the opposite holding wing 116 is indicated by a diameter 16 of a full circle. The diameter 16 of the full circle is selected slightly less than the nominal diameter 15 of the closing bowl 1. The outer diameter 19 of the edge 10 of the hole is measured outside the holding wings 11a, 11b, 11e, 116. In order for the closing bowl 1 to cover the bottom of the bowl 2 from above, the outer diameter 19 must be selected slightly less than the inner diameter 18 of the retaining edge 4 (see Fig. 3).

Further, in a plan view according to FIG. 8 you can see the symmetrical distribution of the retaining wings 11a, 11b, 11e, 116. In this view, you can also clearly see the symmetrical implementation of each holding wing 11a, 11b, 11e, 116. Based on the opening adjusted to the curvature of the edge 10, the rounded outer edge 14, the leading edge 12 and the trailing edge 13 of each holding wing 11a, 11b, 11e, 116 extend at the same angle in the direction of the edge 10 of the hole.

FIG. 9 shows a bottom bowl 2 in a side view. An initially conically divergent base region 35 adjoins the bottom plate 36, which transforms into a substantially cylindrical, only slightly conically divergent side wall 33. In the upper portion 34a of the side wall 33, it transitions into a conical wall, which in turn ends with edge 10 holes

- 6 010245 or the retaining wings 11a, 11b, 11e, 116 respectively disposed thereon. These retaining wings 11a, 11b, 11e, 116 have the same material thickness as the edge 10 of the hole. In addition, it can be seen that the holding wings 11a, 11b, 11e, 116 are also located in the same horizontal plane with the edge 10 of the hole. However, it is also possible to form retaining wings 11a, 11b, 11e, 116 with a material thicker with respect to the opening edge 10. In this case, the holding wings 11a, 11b, 11e, 116 may also have a bevel close to the thread rise on their lower side.

FIG. 10 shows, in a plan view, the bottom bowl 2 with the retaining wings 11a, 11b, 11e, 116 radially protruding from the opening edge 10 of the hole. However, the holding wings 11a, 11b, 11e, 116 are asymmetrical in contrast to those shown in FIG. 8 and 9 of an embodiment. In this case, the leading edge 12 increases steeply in the radial direction. The angle is approximately 45 to 60 °. A uniformly convex-curved common external and trailing edge 13, 14, which directly passes to the next leading edge 12, adjoins the leading edge 12.

In the following FIG. 11-14 show the manufacture by deep drawing of the first threaded bowl, as well as various embodiments of the molding tool 20 of the invention. Said bowl in this case is a closing bowl 1.

FIG. 11a-11c show, partially in cross-section, the molding tool 20 in three different functional positions with the film 23 already formed into the closing cup 1.

In FIG. 11a, the inner punch 39, the holding sleeve 21 and the threaded sleeve 22 are in the initial position relative to each other. In this case, the threaded sleeve 22 surrounds the outside of the holding sleeve 21 and the inner punch 39, which are located together in the molding tool 20 without the possibility of rotation. The threaded sleeve 22 is mounted to rotate around the holding sleeve 21. In the threaded sleeve 22, a contour 25 is formed to make a thread 7a, 7b, 7c, 76, 7e, 7 £ of thread so that the heated film 23 is accordingly adapted to the shape of the forming tool 20 and, in particular, also to the contours 25 of the threaded sleeve 22.

Using a composite molding tool 20 including a holding sleeve 21 and a threaded sleeve 22, in a first step of the method according to FIG. 11a, it is possible to form first of all at least two threads 7a, 7b, 7c, 76, 7e, 7e of thread and then release the closing cup 1 from the molding tool 20. This occurs according to FIG. 11b by unscrewing the threaded sleeve 22 relative to the stationary holding sleeve 21 in the direction of movement 37. After unscrewing, the threaded sleeve 22 is lowered below the level of the punch counter 41 and is no longer in contact with the thread turn 7a.

During the time shown in FIG. 11a molding and during unscrewing according to FIG. 11b, the film 23 is fixed by means of a holding device 40 concentrically arranged around the molding tool 20. For this purpose, the holding device 40 includes a stationary punching counter 41 and a holding plate 42 which can be lowered in the direction of the punching counter 41 to hold the film 23 in between. 41 and the holding plate 42.

The rotation of the cover plate 1 formed in the film 23 in addition to the holding device 40 is also prevented by the holding sleeve 21. For this, the holding sleeve 21 is provided with retaining ribs 26 in its wall portion 28, which are particularly clearly visible in FIG. 13. The retaining ribs 26 are molded in the peripheral wall 29 of the closing bowl 1 in the form of a corrugated structure 30 and allow the transmission of force with a geometric closure.

In the latter, shown in FIG. 11c, the holding sleeve 21, together with the inner punch 39, moves back in the axial direction, and the lowering holding plate 42 is lifted so that the film 23 with the closing cup 1 pushed out therein is released and can be transported. Then, at the next processing step known to those skilled in the art, the closure cup 1 can be cut from the film 23.

The various functional positions of the mold cutting tool 20 are shown in FIG. 12 also in partial cross section. In this case, the assembly including the centrally located inner punch 39, the holding sleeve 21 and the threaded sleeve made with the possibility of rotation around it, is substantially identical to that shown in FIG. 11 molding tool 20.

However, the forming tool 20 is concentrically surrounded by a holding and punching device 43, with which the closing cup 1 can be cut from the film 23 directly on the forming tool 20.

The device 43 for holding and cutting includes a knife sleeve 24 immediately adjacent to the threaded sleeve 22, a separating plate 44 located around the knife sleeve 24 and a knife plate 45 located above the separating plate 44. Both the separating plate 44 and the knife plate 45 are arranged vertical movement.

The forming of the closing bowl 1 in the film 23 is carried out according to the position of the forming tool 20 in FIG. 12a. In this case, the film is fixed due to the clamping action by

- 7 010245 of the knife plate 45, lowered in the direction of the separating plate 44. After fixing, the separating plate 44 and the knife plate 45 are lowered together so that a step is formed at the transition point of the separating plate 44 to the knife sleeve 24 in the film 23.

In FIG. 12b, the threaded sleeve is unscrewed in accordance with the direction of movement 37, and the thread turn 7a is shown in the closing bowl 1. Before unscrewing, the knife sleeve 24 was moved upward, as a result of which the film 23 was cut off with its knife plate 45 over its entire entire outer periphery. the torque 23 adjacent to the molding tool 20, in this embodiment, the torque is perceived only by the corrugated structure 30 formed on the peripheral wall 29 and formed in response to them in the holding sleeve e 21 retaining ribs 26 and consequently at prevents twisting of joint rotation is separated between the film 23 closing the bowl 1.

Finally, as shown in FIG. 12c, the inner punch 39 extends axially forward with respect to the stationary holding sleeve 21, and the holding and punching device 43 opens. By extending the inner punch 39, the closure bowl 1 can very easily be removed from the molding tool 20. The knife bush 24 returns to its lowered position.

In a partial top view of the molding tool 20 according to FIG. 13, the retaining ribs 26 located in the holding sleeve 21 can be seen to hold the closure bowl 1 completely separated from the film 23 or to help maintain the closure bowl 1 still in connection with the film 23. For this purpose, the retaining ribs 26 are oriented perpendicular to their axial orientation the direction of movement 37 of the threaded sleeve 22. The holding ribs 26 are located in an inclined section 28 of the wall of the holding sleeve 21. In turn, after the manufacturing process, the holding ribs 26 are detected It is in the form of a corrugated structure 30 to completely cover the molded lid 1.

The holding sleeve 21 is provided with several openings 27 for removing air, through which air located between the film 23 and the forming tool 20 can be released or removed.

FIG. 14, in a partial cross-sectional view, shows a further alternative embodiment regarding a holding and punching device 43 located around the molding tool 20 for cutting with steel tape.

The central assembly of the forming tool 20 here is also an inner punch 39, the holding sleeve 21 and the threaded sleeve 22. The forming tool 20 is surrounded by a holding and punching device 43, which includes a stationary punching counter support 41, which is able to lower the holding plate 42 and installed on a holding plate 42, a knife 46 in the form of a steel tape.

In a first step of the method of FIG. 14a, the film 23 is moved through the forming tool 20 and is annularly fixed around the forming tool 20, in which the holding plate 42 is lowered, and as a result, the film lying on the punch counter support 41 is clamped

23.

Then, as shown in FIG. 14b, the threaded sleeve 22 is twisted in the direction of movement 37. With this mode of action, the film 23 is held by both the holding sleeve 21 and the film joint.

The following shown in FIG. 14c, the method step includes lowering the knife 46 in the form of a steel tape onto the film 23, as a result of which the closure bowl 1 is cut along the periphery of the film 23. However, the knife 46 in the form of a steel tape is formed on its lower side at discrete intervals, alternating with recesses so that the closure cup 1, due to the residual jumpers 38, remains connected to the film 23. These residual jumpers 38 break in a controlled manner in the subsequent stacking step.

After cutting the closing cover 1 from the film 23, the holding plate 42 rises, and the inner punch 39, together with the holding sleeve 21, moves down to the standard level of the cutting counter support 41 and the threaded sleeve 22 lowered (see Fig. 146). In this position, the film 23 together with the closing cup 1 can be removed horizontally in a simple way from the forming tool 20 and the device 43 for holding and cutting.

List of Reference Items

- 8 010245

bottom bowl

Cap shaped central part holding edge

Transition belt

Inner side of the retaining edge

Thread winding

Seal

Sealing cone bottom side of the first second second bowl

Holding wings

Front edge of retaining wings

Trailing edge of retaining wings

The diameter of the full circle of the retaining wings

Spiral tooth

Inner diameter of retaining edge

Outer diameter of hole edge

Molding tool

Rotatable threaded film

Thread contour

Holding ribs

Central vent cap vents

The inner side of the peripheral wall

Outdoor

Corrugated side of the thread winding area of the thread winding

Side wall of the bottom of the bowl

The upper portion of the side wall

Lower side wall section

Basement area of the side wall bottom plate

Direction of movement of the threaded sleeve residual jumper

Inner punch

Restraint

Die cut counter

Made holding plate

Device for holding and cutting down

Knife plate

Steel tape knife

Open thread entry

Cut edge

The outer edge of the retaining wings

Nominal diameter of the retaining edge side of the peripheral wall structure of the peripheral wall

Section of the wall of the holding sleeve

Peripheral Wall

Claims (34)

1. The first bowl, for example, a closing bowl (1), of a shaped part made of polymer material obtained by deep drawing with the inner part (3) made in the form of a cap and the outer retaining edge (4), and on the first bowl (1, 2) there is fastening means (47) for making a threaded connection, which includes an adapter belt (5) formed between the retaining edge (4) and the central part (3) made in the form of a cap and at least two retaining retainers located on the inner side (6) edges (4) with the same rise of the thread (7a, 7b, 7c, 76, 7e, 7G), characterized in that the adapter belt (5) on one side limits the at least two turns (7a, 7b, 7c, 76, 7e, 7G) ) threads, and these at least two turns (7a, 7b, 7c, 76, 7e, 7G) of threads have an open input (48) of thread, and the contours of turns (7a, 7b, 7c, 76, 7e, 7G) of a thread are formed both on the inside (6a) and on the outside (6b) of the holding edge (4). 2. The first bowl according to claim 1, characterized in that the threads (7a, 7b, 7c, 76, 7e, 7d) of the thread are diametrically opposed, respectively. 3. The first bowl according to claim 1 or 2, characterized in that the threads (7a, 7b, 7c, 76, 7e, 7d) of the thread have a rise of 5 to 30 °. 4. The first cup according to any one of claims 1 to 3, characterized in that the cups (1, 2) are provided with a seal (8). 5. The first bowl according to claim 4, characterized in that the seal (8) is made in the form of a concentric circumferential sealing cone (8a) on the lower side (9) between the central part (3) made in the form of a cap and the transition belt (5). 6. A second bowl, for example, a bottom bowl (2), made from a method of deep drawing of a shaped part made of polymeric material with a side wall (33), the side wall (33) on its upper section (34a) made with a round edge of the hole, and on its lower section (34b) is firmly closed by the bottom plate (36), and on the second bowl (1, 2) there is fastening means (47) for making a threaded connection, and the fastening means (47) includes two radially protruding on a round edge ( 10) openings of the rigid holding wing (11a, 11b, 11c, 116), exl. sistent in that the retaining flaps (11a, 11, 11c, 116) are coplanar with respect to each other and the flat top end edge of the opening. 7. The second bowl according to claim 6, characterized in that the retaining wings (11a, 11b, 11c, 116) are respectively diametrically opposed. 8. The second bowl according to claim 6 or 7, characterized in that the holding wings (11a, 11b, 11e, 116) have a leading edge (12) and a trailing edge (13) radially extending relative to the second bowl, which are connected to each other by an outer edge concentrically curved relative to the second bowl (14). 9. A resealable container with a first bowl, for example a closing bowl (1), according to any one of claims 1 to 5, and configured to fasten to the first bowl with a second bowl, such as a bottom bowl (2), according to any one of claims 6- 8, in which the first cup (1, 2) has an inner central part (3) made in the form of a cap and an outer holding edge (4), and in which the second cup (1, 2) includes a side wall (33), moreover the side wall (33) in its upper section (34a) is made with a round edge (10) of the hole, and in its lower section (34b) it is firmly closed by the bottom lining (36), and in which in the assembled state the first bowl (1, 2) acts externally on the second bowl (1, 2) and acts as a retaining edge (4) for the second bowl, characterized in that on the first bowl (1, 2 ) between the retaining edge (4) and the central part (3) made in the form of a cap, a transition belt (5) is formed, and that the first and second cups (1, 2) are made with the possibility of screwing to each other by means of a threaded connection (47), moreover the threaded connection (47) includes on the first bowl on the inner side (6) of the holding edge (4) at least There are two turns (7a, 7b, 7c, 76, 7e, 7G) of thread with the same lift, which are bounded respectively on one side by the transitional belt (5) and have an open entrance (48) of thread, and on the second bowl (1 , 2) at least two openings of the rigid holding wings (11a, 11b, 11c, 116) radially protruding from the circular edge (10). 10. The container according to claim 9, characterized in that the number of retaining wings (11a, 11b, 11c, 116) is less than or equal to the number of turns (7a, 7b, 7c, 76, 7e, 7G) of the thread. 11. The container according to claim 9 or 10, characterized in that the said at least two turns (7a, 7b, 7c, 76, 7e, 7d) of thread in the circumferential direction have a larger width than the holding wings (11a, 11b, 11c , 116). 12. A container according to any one of claims 9 to 11, characterized in that the first bowl (1, 2) in the area of the retaining edge (4) and between the opposite turns (7a, 7b, 7c, 76, 7e, 7G) of the thread has a nominal diameter (15), which is slightly larger than the diameter (16) of the full circle of retaining wings (11a, 11b, 11c, 116). 13. A container according to any one of claims 9-12, characterized in that the first bowl (1, 2) in the area between the spiral teeth (17b, 176) of the turns (7a, 7b, 7c, 76,) of the thread has an inner diameter (18 ), which the - 10 010245 is slightly larger than the outer diameter (19) of the edge (10) of the hole. 14. A deep drawing method for manufacturing the first bowl (1, 2), for example, a closing bowl (1), according to any one of claims 1 to 5, using a forming tool (20) with a holding sleeve (21) located without the possibility of rotation and with a threaded sleeve (22) configured to rotate in a circumferential direction relative to the holding sleeve (21), in which, in the initial position of the holding sleeve (21) and the threaded sleeve (22), the film (23) is moved through the forming tool (20); install the film (23) to form the bowl (1, 2) in the molding tool (20), clamp it and form; lead the threaded sleeve (22) by twisting to the final position; and remove the bowl (1, 2) from the holding sleeve. 15. The deep drawing method according to claim 14, wherein the bowl (1, 2) is held by the holding sleeve (21) and / or film (23) during unscrewing. 16. The deep drawing method according to claim 14 or 15, in which the bowl (1, 2) together with the film (23) is removed from the holding sleeve (21). 17. The deep drawing method according to claim 14 or 15, in which the bowl (1, 2) on the molding tool (20), after unscrewing the threaded sleeve (23), is cut out of the film (23). 18. The deep drawing method according to claim 14, wherein the bowl (1, 2) on the molding tool (20) is cut out of the film (23) before unscrewing the threaded sleeve (23). 19. The deep drawing method according to claim 17 or 18, in which the bowl (1, 2) is completely cut out of the film (23). 20. The deep drawing method according to claim 17 or 18, in which the bowl (1, 2) is partially cut out from the film (23) and the residual jumpers (38) between the film (23) and the bowl (1, 2) are left. 21. A molding tool (20) for implementing the method according to any one of claims 14 to 20 with a rotary holding sleeve (21) and rotatably rotated from a starting position to an end position in a circumferential direction relative to the holding sleeve (21) threaded the sleeve (22), and in the threaded sleeve (22), the contours (25) are made for forming at least two turns (7a, 7b, 7c, 76, 7e, 7ί) of the thread. 22. A forming tool according to claim 21, in which an inner punch (39) is located centrally inside the holding sleeve (21). 23. A forming tool according to claim 22, wherein the inner punch (39) and / or the holding sleeve (21) are movable in the axial direction. 24. A forming tool according to any one of claims 21-23, wherein the threaded sleeve (22) is concentrically arranged around the holding sleeve (21). 25. A forming tool according to any one of claims 21-24, wherein the holding sleeve (21) has an inclined wall portion (28) on which the holding ribs (26) are located. 26. Molding tool according A.25, in which the holding ribs (26) are oriented in the axial or radial direction of the holding sleeve (21). 27. Molding tool according to any one of paragraphs.21-26, in which around the threaded sleeve (22) is a holding device (40). 28. A forming tool according to claim 27, wherein the holding device (40) includes a stationary punching counter support (41) and a holding plate (42) configured to lower. 29. A molding tool according to any one of paragraphs.21-26, in which on the periphery around the threaded sleeve (22) is a device (43) for holding and cutting. 30. The molding tool according to clause 29, in which the device (43) for holding and cutting includes a separating plate (44); made with the possibility of lowering the knife plate (45) and concentrically surrounding the threaded sleeve (22); stationary knife sleeve (24), and the separating plate (44) and knife plate (45) are made with the possibility of vertical movement. 31. A molding tool according to claim 30, in which the knife sleeve (24) is located between the threaded sleeve (22) and the separating plate (44). 32. The molding tool according to p, in which the device (43) for holding and cutting includes a stationary punching counter support (41); the holding plate (42) made with the possibility of lowering and the knife (46) made with the possibility of lowering onto the punching counter support (41) in the form of a steel strip. 33. A forming tool according to any one of paragraphs.21-32, in which openings (27) are located in the holding sleeve (21) to remove air. 34. A molding tool according to any one of paragraphs.21-33, in which the threaded sleeve (22) between the initial and final positions passes a distance that corresponds to 10 to 25% of its circumference.