Device for producing plastic containers, mould and system consisting of set of individual moulds

Abstract

The utility model relates to equipment for producing a plastic container according to a forming-filling-sealing process, a mould and a system consisting of a group of independent moulds, the equipment at least comprises a forming device and a production device, the production device is provided with mandrels of an output device for filling fluid, the central longitudinal axes (36) of adjacent spindles (12) have a predeterminable constant distance dimension A from each other, and wherein the distance dimension B between the respective adjacent mold recesses of the molds which differ from each other with respect to the dimensions of the mold recesses thereof is adapted to the distance dimension A in a parameterized range in such a way that the central longitudinal axes (36) of the adjacent spindles (12) have a predeterminable constant distance dimension A from each other, and wherein the central longitudinal axes (36) of the adjacent spindles (12) have a predeterminable constant distance dimension A from each other. In this way, different container sizes can be produced using only one output device (14) and a set of parameterized moulds. According to the utility model, under the condition that the production rate of the finished product container is equivalent to that of the finished product container in the prior art, the consumption related to equipment and mold manufacturing is reduced.

Description

Technical Field

[0001] The utility model relates to a device for producing plastic containers according to a forming-filling-sealing process (BFS process) and a related mold. The device at least comprises a forming device, wherein the forming device has at least one mold, and the mold has a plurality of mold recesses with predetermined contours and volumes of corresponding containers; and a production device, wherein the production device supplies plasticized plastic material to the corresponding mold of the forming device, and a container is formed by means of the forming device and can be sealed after being filled with fluid. The production device has respective mandrels of an output device for filling the fluid, and the mandrels are respectively assigned to a mold recess in a mold of the forming device. Background Art

[0002] DE 10 2020 002 077 A1 discloses a method and an associated device for producing at least one container filled with a medium and made of a plastic material, characterized by at least the following method steps:

[0003] - extruding the tube in a preforming position by means of an extrusion device in a vertical extrusion direction using an auxiliary gas;

[0004] - closing the hose at its lower end and separating it at its upper open end;

[0005] - transporting the preforms cut to length in this way by means of a gripper device in a linear transport direction transverse to the extrusion direction from the preforming position into the open mold;

[0006] - Transferring the preform into the open mold in the main forming position by means of a gripper device;

[0007] - closing the mould so that the preform is further shaped by the pressure gradient;

[0008] - filling and closing the preforms; and

[0009] - The clamping device is transported back for repeating the above method steps.

[0010] WO 02 / 49821 A2 discloses a method for blow-molding, filling and closing containers, wherein at least one hose of plasticized plastic material is squeezed into an open mold. The hose is welded at its front end by closing the mold. In addition, the hose is cut above the mold by means of a separating element in order to form a filling opening. The mold with the hose section located therein is then moved into a filling position, where the container is formed and filled by means of a blow molding mandrel in the mold. After filling, the container still in the mold is closed. In addition, a corresponding device is disclosed.

[0011] WO 2020 / 201061 A1 discloses a blow mold for a blow molding machine, which is used to produce empty plastic containers in an extrusion or stretch blow molding process, and the blow mold comprises two blow mold halves, each of which has at least one mold body and a substrate for accommodating a mold body, and at least one mold cavity is arranged in the at least one mold body. An insulating block made of insulating material is arranged between the mold body and the substrate and possible other parts of the blow mold half. In this way, the material to be heated or cooled again should be significantly reduced and the relevant heating or cooling basically only involves the mold body, thereby reducing the energy consumption associated with this. The mold cavity that can be heated and then immediately cooled again (in the form of the mold recess of the mold) combined with the polished molding wall surface of the mold cavity and the short cooling time also allows the production of plastic containers with a bright surface.

[0012] In these and other known equipment solutions, a separate mold is produced for each container size and, in the case of the BFS process, a specific filling or dispensing device with its respective blowing and / or filling mandrels (hereinafter referred to as mandrels) is adapted thereto. In the case of correspondingly large-volume containers, for space reasons, the number of mold recesses in the mold and the number of associated mandrels of the filling or dispensing device must be reduced accordingly. Also, in view of the high productivity of the containers, the number of mold recesses and the number of mandrels in the mold are increased if the container dimensions are correspondingly small. Ultimately, this leads to an increase in the expenditure on mold manufacturing and production equipment manufacturing, as shown by way of example in DE 10 2020 002 077 A1. Utility Model Content

[0013] Starting from the prior art, the invention is based on the object of further improving the known solutions in such a way that the outlay associated with the equipment and the production of the molds is reduced while the production rate of the finished containers is comparable to that shown in the prior art.

[0014] The above-mentioned object is achieved by a device for producing plastic containers according to the form-fill-seal process, a mold and a system consisting of a group of individual molds.

[0015] The device according to the invention comprises at least a forming device, which has at least one mold, which has a plurality of mold recesses that predetermine the contour and volume of the corresponding container; and a production device, which supplies plasticized plastic material to the corresponding mold of the forming device, by means of which the container is formed and can be closed after filling with a fluid, and the production device has individual mandrels of the discharge device for filling with fluid, which are respectively assigned to a mold recess in a mold of the forming device, wherein the central longitudinal axes of adjacent mandrels have a predeterminable constant spacing dimension A to each other, and the spacing dimension B between the individual adjacent mold recesses of the molds that differ from each other at least in terms of the size of their mold recesses is adapted within the parameterization range to the spacing dimension A so that different container sizes can be produced using only one discharge device and a set of parameterized molds. In this way, filled containers of different sizes can be produced using only one filling or discharge device with a predeterminable number of mandrels and different molds. The filling material is preferably a liquid, but can also be an emulsion or suspension for medical purposes, such as an infusion solution, a dialysis solution or an enteral nutrition solution.

[0016] Surprisingly for a person skilled in the art in the field of such forming, filling and sealing processes, the parameterization of the above-mentioned spacing dimensions has resulted in new machine and mold standards, which significantly reduce the effort in producing filled containers, especially filled and sealed bottles with a volume of 50 ml and more, especially when, for example, the container shape / container size is to be changed with the same filling material and the mold is therefore changed. This has no equivalent in the prior art.

[0017] According to an extension of the present invention, the predeterminable spacing dimension A is between 5 cm and 10 cm, preferably between 5 cm and 8 cm. The present invention also claims a mold for producing containers of different volumes, the mold being particularly configured for the device. A plurality of molds in the mold have the same spacing dimension B and a plurality of spacing dimensions B correspond to the predeterminable spacing dimension A, the spacing dimension A being derived within the parameterization range from the spacing between mutually adjacent central longitudinal axes of the mandrels of the output device.

[0018] According to a further development of the invention, in order to produce containers of different volumes, the spacing dimension B is achieved by different bridge widths S between adjacent mold recesses as a parameterized variable.

[0019] According to an extension of the invention, the mold is used to produce containers with a nominal filling volume of no more than 1 liter, characterized in that the parameterized bridge width S is selected in the range of 10 to 40 mm, preferably 10 to 35 mm, particularly preferably 10 to 33 mm.

[0020] According to an extension of the present invention, in order to maintain a predeterminable spacing dimension A of preferably 75 mm, the width S of each bridge portion is parameterized as 28 mm-35 mm for a container nominal volume of 100 ml, as 23 mm-33 mm for a container nominal volume of 250 ml, and as 12 mm-30 mm for a container nominal volume of 500 ml.

[0021] According to a development of the invention, the molds each consist essentially of two identical mold halves which fit one above the other and delimit respective mold recesses which are closed on the bottom side and open on the top side.

[0022] According to an extended solution of the present invention, the corresponding mold half is assembled from individual segments, including a separate segment for the top side and a separate segment for the bottom side and a separate segment located therebetween, wherein the separate segment located therebetween has a mold recess and a bridge portion with a predetermined width arranged between the mold recesses, and a parameterized bridge portion width S of the bridge portion remains constant within the individual segments.

[0023] According to a development of the invention, the individual segments, in particular the individual segments with the tool recesses and the webs with parameterized width S between the tool recesses, are made of aluminum bronze, particularly preferably of beryllium-free aluminum bronze.

[0024] According to an extended solution of the present invention, the surface of the mold recess is polished.

[0025] According to a further development of the invention, the mold is temperature-controllable and preferably has a connection for conducting a cooling medium.

[0026] According to a development of the invention, the molds each have 4 to 12, preferably 8, mold recesses.

[0027] The present invention also seeks to protect a system consisting of a group of individual, in particular, molds as described above, which is used for, in particular, the device of the present invention, and is characterized in that, in order to produce plastic containers of different volumes, individual molds are provided, which have mold recesses of different sizes, and the mold recesses have the same spacing dimension B with each other within a parameterized range, which spacing dimension corresponds to a predeterminable spacing dimension A between adjacent core shafts of the output device.

[0028] According to an extension of the invention, the system comprises at least two molds, by means of which plastic containers with nominal filling volumes of 500 ml and 250 ml can be produced, the plastic containers being particularly used for medical purposes, such as for infusion and / or flushing.

[0029] According to an extension of the present invention, the system comprises at least two molds, by means of which plastic containers with nominal filling volumes of 250 ml and 100 ml can be produced, the plastic containers being particularly used for medical purposes, such as for infusion and / or flushing.

[0030] Within the scope of this parameterization of the distance dimension, it has proven to be advantageous to provide a predeterminable distance dimension A for the spindles of the dispensing device between 6 and 10 cm, preferably between 7 and 8 cm.

[0031] The mold used in the device is characterized in that a plurality of molds for producing different containers, in particular of different volumes, have the same spacing dimension B and that the plurality of spacing dimensions B corresponds to a predeterminable spacing dimension A, which results as a grid dimension within a parameterized range from the spacing between adjacent central longitudinal axes of the mandrels of the output device.

[0032] Preferably, provision is made here that the spacing dimensions B of different molds for producing containers of different volumes are achieved by different bridge widths S between adjacent mold recesses as parameterized variables. It has been shown that when using semi-crystalline plastics as the plastic material for the container product, a high surface quality and a higher transparency of the container can be achieved by suitable selection of the corresponding bridge width S, so as to ensure in a simple manner an optical non-destructive inspection of the finished container, for example with regard to possible particle contamination of the container with its contents. For this purpose, provision is made in a particularly advantageous manner that, for the production of containers with a nominal volume of less than 1 liter, the parameterized bridge width S is selected in the range of 10 to 40 mm, preferably 10 to 35 mm, particularly preferably 10 to 33 mm. It has proven to be particularly advantageous for the parameterization that, in order to maintain a predeterminable grid size or spacing dimension A (which is also expressed in professional terms as cavity spacing and should preferably be 75 mm), the individual bridge widths S are parameterized to 28 mm - 35 mm for a container nominal volume of 100 ml, to 23 mm - 33 mm for a container nominal volume of 250 ml and to 12 mm - 30 mm for a container nominal volume of 500 ml.

[0033] In another particularly preferred embodiment of the mold according to the invention, it is provided that the mold is essentially composed of two identical mold halves, which are superimposed on each other and define corresponding mold recesses, which are closed on the bottom side and open on the top side. Preferably, the corresponding mold halves are assembled from individual segments, including individual segments for the top side and individual segments for the bottom side, and individual segments located between them, wherein the individual segments located between them have mold recesses and bridges arranged between the mold recesses, the width of which can be predetermined, and the parameterized bridge width S of the bridges remains constant within the individual segments. In this way, a modular system consisting of a plurality of different individual segments is provided, which can be assembled into corresponding molds, so that a large number of container sizes and container shapes can be covered with only a few basic components. In particular, the same individual segments can be used for the top side and the bottom side, as long as only the individual segments located between them and having the mold recesses are suitable for different container volumes. For example, for a small container volume, the axial installation length of the separate segment located in the middle can be constructed to be shorter than that of a large-volume container, that is, the container volume to be produced can be predetermined by the installation length of the mold recess or cavity in the separate segment in the middle, and during operation, the longitudinal axis of the corresponding mold recess extends coaxially with the longitudinal axis of the dispensing spindle of the filling or dispensing device, that is, although the volume in the mold changes, the spacing dimension B does not change in this case.

[0034] In another preferred embodiment of the mold, it is provided that the individual segments, in particular the individual segments with the mold recesses and the bridges with parameterized widths located therebetween, are made of aluminum bronze, particularly preferably of beryllium-free aluminum bronze. The use of such materials, compared to other used materials such as aluminum, steel or non-ferrous metals, allows the thermal conductivity of the mold to be increased, thereby increasing the productivity of the BFS production process and providing good inspectability of the container products.

[0035] In order to improve the surface quality of the container, it can also be preferably provided that the surface of the mold recess of the mold is polished.

[0036] Due to the standardization of the individual segments for the molds, these molds can also be uniformly temperature-controlled and provided with connections for conducting cooling media in a particularly simple manner.

[0037] Within the scope of the overall parameterization, it has also proven to be advantageous in terms of productivity if the corresponding mold has 4 to 12, particularly preferably 8, mold recesses as a further grid size.

[0038] The subject of the solution according to the utility model also relates to a system consisting of a set of molds, characterized in that, in order to produce plastic containers of different volumes, individual molds are provided, which have mold recesses of different sizes, and the mold recesses have the same spacing dimension B with each other within the parameterization range, which corresponds to the predeterminable spacing dimension A between the mandrels of the filling or dispensing device. Through this system, different molds can be used to produce container products with different volumes without substantially modifying the filling or dispensing device. The typical nominal filling volume (the amount to be contained in the package according to Section 6 of the Measuring Law) of such containers for infusion solutions is, for example, 50ml, 100ml, 250ml and 500ml. Since a certain amount of air is also required in the container, the total volume of these containers is always greater than the nominal filling volume. For nominal filling volumes above 50ml, the container is usually completely formed in the mold by blowing in sterile air through the corresponding mandrel before filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The solution according to the present invention is described in detail below with reference to the accompanying drawings using an embodiment. The accompanying drawings are shown in principle and not to scale. The accompanying drawings are as follows:

[0040] Figure 1 A perspective view of a filling or dispensing device with eight mandrels and a central control unit arranged below the filling or dispensing device according to Figure 3 The mold halves of the mold shown;

[0041] Figure 2 A perspective view of a mold consisting of two mold halves separated from one another, each of which is essentially assembled from three individual segments;

[0042] Figures 3 to 5 showing in perspective view the mold halves of the mold for container sizes of 100 ml, 250 ml and 500 ml respectively; and

[0043] Figure 6 The container product is shown in a side view, which can be, for example, Figure 3 The mold manufacturing shown. DETAILED DESCRIPTION

[0044] In the prior art already cited, the hose extruded from the hose head is introduced into the mold by means of a clamp (DE 102020 002 077 A1) or is extruded directly into an open mold.

[0045] For simplicity, Figure 1Only the filling or dispensing device 14 and its individual blow-molding-filling mandrels 12 of the above-mentioned structure are shown, which are used for blow molding and dispensing the corresponding filling medium into the container body 18 of the container 16 to be manufactured respectively. The above-mentioned dispensing device 14 can be moved up and down in the vertical direction by means of a servo drive 20. In this way, in particular, the mandrel 12 can be moved back upward after the corresponding container body 18 is filled, so that the sealing unit (not shown further) can close the corresponding container product by the head part 22 to be molded, which is usually connected to the container body 18 in one piece by a neck part 24 (see Figure 6 ). The above-mentioned sealing unit is prior art, and thus will not be described in detail here.

[0046] For the sake of simpler illustration and better understanding, the aforementioned numerous additional components of the extrusion head or the shaping device are not shown in any case.

[0047] In accordance with Figure 1 In the illustration of FIG. 1 , a mold half 32 of the mold 28 is shown below the filling or dispensing device 14 in each case, as described in more detail for predeterminable container sizes in FIG. Figure 2 The simplified illustration above is intended only to illustrate that each mandrel 12 is assigned a mold recess 34, which has the introduced hose material or container material. Figure 1 Only one half of the mold recess 34 in the relevant mold half 32 is shown. The mold recess 34 formed by the two closed mold halves 30, 32 as the corresponding mold 28 is used as a whole for container production, and the plastic hoses respectively plasticized by the extrusion head enter the assigned mold recess 34 of the corresponding mold 28 of the molding device 26. The molded hose is separated on the top side, and the container body 18 is molded in the relevant mold recess 34 by blow molding and / or vacuum molding with the help of the set mandrel and filled with a predeterminable medium such as a liquid drug by the mandrel 12 of the filling or dispensing device 14. For this purpose, the filling or dispensing device 14 is located in a lowered filling position with its mandrel 12 using the servo drive 20. Subsequently, the device 14 moves back upward in the opposite direction and performs head molding and sealing as described above with the help of a sealing unit not further shown. The container product produced in this way leaves the mold 28 as a filled container 16, as it is in Figure 6 Of course, other container geometries can be manufactured at will if desired.

[0048] like Figure 1 As further shown, the central longitudinal axes 36 of adjacent mandrels 12 have a predeterminable constant spacing dimension A from one another. All filling mandrels 12 are designed as hollow cylinders for fluid delivery and are concentric with their respective central longitudinal axes 36. For simplicity, only the filling mandrels 12 are described. Figure 1The distance dimension A is plotted as an assumed variable between the two right mandrels 12 in the viewing direction. However, the distance dimension A is constant between all adjacent mandrels 12. Within the scope of parameterization, the distance dimension B between the individual adjacent mold recesses 34 of the molds 28 that differ from one another at least in terms of the size of their mold recesses 34 is adapted to the distance dimension A in such a way that different container sizes can be produced using only one output device 14 and a set of parameterized molds 28. Figure 1 In the view of FIG. 1 , the spacing dimension B corresponding to the spacing dimension A is formed by the central longitudinal axis 38 of two adjacent mold recesses 34 of the mold 28. In this respect, the spacing dimension B, like the spacing dimension A, is also an assumed reference variable within the scope of the parameterization. Figure 1 Only half of the mold recess 34 is shown in the figure; however, once the mold halves 30, 32 are placed against each other to form the complete mold 28, the distance dimension relationship between A and B also applies to the corresponding complete mold recess 34. In this case, it has proven to be particularly advantageous to select the predeterminable distance dimension A between 6 cm and 10 cm, preferably between 7 cm and 8 cm.

[0049] Especially from Figures 3 to 5 As can be seen, all molds 28 for different container volumes, for example 100 ml, 250 ml and 500 ml, have the same spacing dimension B, which corresponds to the spacing dimension according to Figure 1 The predeterminable spacing dimension A. Figures 3 to 5 The illustration shows a respective front view of a mold half 32 of a respective mold 28, and the central longitudinal axis 38 of adjacent mold recesses 34 or mold recess halves for the respective mold half 32 of the respective mold 28. Figures 3 to 5 All molds 28 are identical. In particular, according to Figure 3 The mold 28 corresponds to the Figure 1 Thus, a plurality of molds 28 for different containers 16 with different container volumes have the same spacing dimension B, which corresponds to the spacing dimension according to Figure 1 The distance dimension A is measured between the central longitudinal axes 36 of two adjacent mandrels 12 in the mandrel arrangement of FIG. Thus, the distance dimension B results from the distance A within the parameterization.

[0050] The distance dimension between the central longitudinal axes 38 of two adjacent mold recesses 34, which is indicated by the reference symbol B, is also referred to as the cavity distance in professional terms, and a cavity distance B of 75 mm has proven to be particularly advantageous within the scope of the embodiment proposed here. Figures 3 to 5 In the figure, only the corresponding central longitudinal axis 38 is drawn for the two right-hand mold recesses 34; however, the relationship applies to Figures 3 to 5 All the tool recesses 34 of the tool 28 are equidistant from each other.

[0051] In order to Figures 3 to 5 In order to achieve a constant spacing dimension B in different molds 28 for producing containers 16 of different volumes, different bridge widths S between adjacent mold recesses 34 are achieved for the molds 28 as parameterized variables.

[0052] Therefore, in order to produce a container 16 with a volume of 100 ml, according to Figure 3 The (half-shown) mold 28 uses a value of 32.2 mm as the parameterized variable or bridge width S, which is Figure 3 The values ​​are shown as being measured between adjacent walls of mutually adjacent mold recesses 34. Figure 3 In the embodiment of FIG. 5 , the bridge width S is the same for all mold recesses 34 .

[0053] In accordance with Figure 4 In the embodiment for producing a container 16 with a volume of 250 ml, a value of 26.5 mm is selected as the bridge width S and thus as a parameterized variable, while the spacing dimension B remains constant. As mentioned above, the spacing dimension B is Figures 3 to 5 All molds 28 are kept the same. Figure 5 In the embodiment of the mold 28 for producing a corresponding container volume of 500 ml, a value of 26.5 mm is also selected as the bridge width S, which is consistent with the Figure 4 The width S of the bridge portion corresponds to Figure 4 The container volume of 250 ml is shown in half compared to the Figure 5 The container volume of 500 ml, which is doubled in the solution of , is obtained by the following manner: the corresponding mold recess 34 is correspondingly extended in the axial direction (ie, in an orientation concentric with the respective central longitudinal axis 38). In this regard, the spacing dimension B also remains constant and is adapted to the spacing dimension A.

[0054] Overall, for containers 16 with a volume of less than 1 liter, the parameterized bridge width S is produced in the range of 10 to 40 mm, preferably 10 to 35 mm, particularly preferably 10 to 33 mm, as shown in FIG. Figures 3 to 5 As described in the implementation method of .

[0055] In particular, in order to maintain a predeterminable spacing dimension A of preferably 75 mm, for containers, in particular containers for infusion solutions or flushing solutions and with a nominal fill volume of not more than 500 ml, the individual bridge widths S are parameterized to 28 mm - 35 mm for a container nominal volume of 100 ml, to 23 mm to 33 mm for a container nominal volume of 250 ml and to 12 mm to 30 mm for a container nominal volume of 500 ml.

[0056] If only containers with a nominal filling volume of not more than 250 ml are to be produced with one set of molds 28 , then preferably the spacing dimension A is 50 mm and the bridge width S as a parameterized variable is 10 mm to 20 mm.

[0057] In addition, if Figure 2 It is further shown that each mold 28 consists essentially of two identical mold halves 30, 32, which define, overlapping one another, respective mold recesses 34 which are closed toward the bottom side 40 and open toward the top side 42. Figure 2 As can be seen further in the figure, the respective mold halves 30, 32 are assembled from individual segments 44, 46, 48, including individual segments 44 for the top side and individual segments 46 for the bottom side 40, as well as individual segments 48 located therebetween, which have the main part of the respective mold recess 34. Between adjacent mold recesses 34 in a row there are respective bridges 50 extending parallel to each other, whose bridge width S is determined according to Figures 3 to 5 The illustration of is parameterized accordingly and remains constant within the individual segments 46. In this regard, the bridge 50 extends transversely to the longitudinal orientation of the respective individual segments 44, 46 and 48. Figure 2 As can be seen from the view, the corresponding mold 28 is provided with a connection 52, which is used for supplying and discharging a cooling medium, which is not described in more detail, in order to quickly cool the introduced plasticized plastic material within the scope of container production or to apply a vacuum in the corresponding mold recess 34 to ensure that the plastic material is cleanly attached to the mold wall of each mold recess 34.

[0058] like Figures 3 to 5 As shown, a system of individual dies 28 is provided, which have die recesses 34 of different sizes, but all of which have the same spacing dimension B from one another within the parameterization, which corresponds to a predeterminable spacing dimension A between adjacent mandrels 12 of the discharge device 14. In this regard, the dies 28 usually differ from one another within the parameterization essentially only by the predeterminable bridge width S of the individual bridges 50 of each die 28.

[0059] In order to reasonably maintain the relative parameters of the spacing dimension B and the bridge width S, it has proven advantageous within the scope of a rapid production sequence to provide a total of eight mandrels 12 and eight mold recesses 34 in each mold 28. This enables a high production output of finished containers 16.

[0060] For the sake of simplicity, all illustrations of the mold 28 do not show the associated forming means for producing the head part 22 for the corresponding container 16. The above-mentioned head forming means are very common and will not be described in detail here.

[0061] In addition, semicrystalline polyolefins are suitable as plastics for the production method according to the invention and as container materials, such as polyethylene (PE), in particular low-density polyethylene (PE-LD), high-density polyethylene (PE-HD) and polypropylene (PP). Blends of semicrystalline polyolefins with amorphous polyolefins, such as cycloolefin polymers (COP) and cycloolefin copolymers (COC), can also be processed advantageously. Thus, it is also possible to produce a container 16 as in DE 10 347 908 A1, which has a corresponding multilayer structure for the container wall.

[0062] As a specific example, a BP 321 bottle packaging machine of the company rommelag in Wiblingen, Germany, was used to produce a closed one-piece infusion container 16 filled with water, which had four different nominal volumes (100 ml, 250 ml, 500 ml and 1000 ml) and an average wall thickness of 0.35 to 0.52 mm from different PP and PE materials according to the blow molding, filling and sealing or capping process. The materials used were PP: LyondellBasell RP 270G; Borealis SB 815 MO, Flint Hills Rexene 23M2A and LDPE: LyondellBasell Purell 3020D and 3220D. For this purpose, a mold 28 made of different materials with eight cavities or mold recesses 34 and bridges 50 with different bridge widths S from 20 mm to 50 mm was used. In the context of plastic container production, the corresponding mold recess 34 is cooled accordingly by supplying a suitable cooling medium via the sub-connector 52 . Figure 6 The container shape of the container 16 shown in FIG. 1 and produced by means of the device according to the utility model corresponds to that of DE 10 2016 002 467 A1. Figure 1 and Figure 2 The container solution shown in .

[0063] Furthermore, the filled container bodies 18 are sterilized by heat treatment (autoclaving). The optical quality (transparency) of the various containers 16 is determined analogously to ASTM D1003-11. Total transmittance, haze and image clarity, surface gloss and color all have an influence on transparency. The transmittance, haze and clarity values ​​of the individual BFS containers 16 are determined using a haze-gard plus measuring device from BYK Gardner GmbH, 82538 Geretsried. The device measures the transmittance at a light wavelength of 550-650 nm. At the measuring point, the wall thickness of the container 16 is approximately 0.45 mm.

[0064] The best results can be achieved with a container 16 and a bridge width S of between 10 and 40 mm, preferably between 10 and 35 mm, particularly preferably between 10 and 33 mm, in particular if the mold 28 and its mold recess 34 are made of a beryllium-containing copper alloy, whose beryllium content is usually between 0.5% and 3%. However, it is particularly preferred to use a mold 28 made of beryllium-free (beryllium content less than 0.3%) aluminum bronze with an aluminum content of between 8% and 16%, although its thermal conductivity at 20° C. is significantly below 100 W / (m*K).

[0065] Despite the temperature control of the mold 28, the bridge width S and therefore the heat capacity directly available for cooling the hot soft plastic hose plays a decisive role in the crystallization behavior (nucleation and nucleus growth) of the plastic used. This is particularly true when using molds 28 made of aluminum bronze. For the transparency properties of the respective container 16, it has proven to be advantageous if the wall of the mold recess 34 of each mold 28 is polished.

[0066] In this way, a device is provided for the low-cost production of containers 16, in particular for filling them with fluids for medical purposes according to the BFS process, by means of which the surface quality of the container 16 can be improved and the transparency increased by reasonable parameterization of the bridge width S when using semi-crystalline plastics, and optical non-destructive inspections, for example regarding particle contamination of the container 16 and its contents, are thus facilitated.

Claims

1. A device for producing plastic containers (16) according to a form-fill-seal process, the device comprising at least a forming device (26), the forming device having at least one mold (28), the mold having a plurality of mold recesses (34) of which the contour and volume of the corresponding plastic container (16) are predetermined; and a production device, the production device supplies plasticized plastic material to the corresponding mold (28) of the forming device (26), the plastic container (16) is formed by means of the forming device and can be closed after filling with a fluid, and the production device has individual mandrels (12) of the output device (14) for filling with fluid, the mandrels being respectively assigned to a mold recess (34) in a mold (28) of the forming device (26), characterized in that The central longitudinal axes (36) of adjacent mandrels (12) have a predetermined constant spacing dimension A from one another, and the spacing dimension B between adjacent mold recesses (34) of molds (28) that differ from one another at least in terms of the size of their mold recesses (34) is adapted within the parameterized range to the spacing dimension A in such a way that different container sizes can be produced using only one output device (14) and a set of parameterized molds (28).

2. The device according to claim 1, characterized in that The predeterminable spacing dimension A is between 5 cm and 10 cm.

3. The device according to claim 1, characterized in that The predeterminable spacing dimension A is between 5 cm and 8 cm.

4. A mold for producing containers of different volumes, the mold being arranged for use in the apparatus according to any one of claims 1 to 3, characterized in that: A plurality of dies (28) in the die have the same spacing dimension B and a plurality of spacing dimensions B correspond to a predeterminable spacing dimension A which results within a parameterized range from the spacing between adjacent central longitudinal axes (36) of a mandrel (12) of a dispensing device (14).

5. The mold according to claim 4, characterized in that: In order to produce plastic containers (16) of different volumes, the spacing dimension B is achieved by different bridge widths S between adjacent mold recesses (34) as a parameterized variable.

6. The mold according to claim 5, characterized in that: The mold is used to produce containers (16) with a nominal filling volume of no more than 1 liter, and the parameterized bridge width S is selected in the range of 10 to 40 mm.

7. The mold according to claim 6, characterized in that: The parameterized web width S is selected within the range of 10 to 35 mm.

8. The mold according to claim 6, characterized in that: The parameterized web width S is selected within the range of 10 to 33 mm.

9. The mold according to any one of claims 5 to 8, characterized in that In order to maintain a predeterminable spacing dimension A, the individual bridge widths S are parameterized to 28 mm-35 mm for a container nominal volume of 100 ml, 23 mm-33 mm for a container nominal volume of 250 ml and 12 mm-30 mm for a container nominal volume of 500 ml.

10. The mold according to claim 9, characterized in that: The predeterminable spacing dimension A is 75 mm.

11. The mold according to any one of claims 5 to 8, characterized in that The molds each consist of two identical mold halves (30, 32) which fit one another and mutually delimit respective mold recesses (34) which are closed on the bottom side (40) and open on the top side (42).

12. The mold according to any one of claims 5 to 8, characterized in that The respective mold halves (30, 32) are assembled from individual segments (44, 46, 48), including an individual segment for the top side (42) and an individual segment for the bottom side (40) and a separate segment located in the middle, wherein the separate segment located in the middle has mold recesses (34) and a bridge portion (50) with a predeterminable width arranged between the mold recesses, wherein a parameterized bridge portion width S of the bridge portion remains constant within the separate segment located in the middle.

13. The mold according to claim 12, characterized in that: The individual segments (44, 46, 48) are made of aluminum bronze.

14. The mold according to claim 13, characterized in that The central individual segment with the die recesses (34) and the bridges (50) with parameterized width S between the die recesses is made of aluminum bronze.

15. The mold according to claim 13, characterized in that The individual segments (44, 46, 48) are made of aluminum bronze that does not contain beryllium.

16. The mold according to any one of claims 5 to 8, characterized in that The surface of the mold recess (34) is polished.

17. The mold according to any one of claims 4 to 8, characterized in that The mould is temperature-adjustable.

18. The mold according to claim 17, characterized in that The mold has a connection (52) for conducting a cooling medium.

19. The mold according to any one of claims 5 to 8, characterized in that The molds each have 4 to 12 mold recesses (34).

20. The mold according to claim 19, characterized in that The molds each have eight mold recesses (34).

21. A system consisting of a set of individual moulds (28) according to any one of claims 4 to 20, characterised in that In order to produce plastic containers (16) of different volumes, individual molds (28) are provided, which have mold recesses (34) of different sizes, which have the same spacing dimension B with respect to one another within a parameterized range, which corresponds to a predeterminable spacing dimension A between adjacent mandrels (12) of a dispensing device (14).

22. The system according to claim 21, characterized in that The system is used for an apparatus according to any one of claims 1 to 3.

23. The system according to claim 21, characterized in that The system comprises at least two moulds (28), with which plastic containers (16) with nominal filling volumes of 500 ml and 250 ml can be produced.

24. The system according to claim 21, characterized in that The system comprises at least two moulds (28), with which plastic containers (16) with nominal filling volumes of 250 ml and 100 ml can be produced.

25. The system according to claim 23 or 24, characterized in that The plastic container (16) is a plastic container for medical use.

26. The system according to claim 25, characterized in that The plastic container (16) is used for infusion and / or flushing.

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