DE102012105999A1 - Blow molding machine for use in e.g. cleaning machine in beverage industry for manufacturing plastic bottle from preform, has filling device for filling liquid and/or solid media that are incompressible into preform and/or elastic element - Google Patents

Abstract

A blow molding machine (50) and a method for producing a hollow body (3) from a preform (2) using a blow molding machine (50) are provided. The blow molding machine (50) has a blow mold (51) for blow molding a hollow body (3) from a preform (2), and a filling device (53) for filling a liquid and / or solid medium (8) which is incompressible during blow molding, before the preform (2) is subjected to compressed air in the preform (2) and / or in an elastic element (59) arranged in the preform (2).

Description

The present invention relates to a blow molding machine and a method for producing a hollow body from a preform with a blow molding machine. In particular, the present invention relates to a blow molding machine and a method for producing a hollow body from a preform with a blow molding machine, which reduce the costs for the operation of the blow molding machine and shorten the time required for treating a hollow body with a blow molding machine and / / or a container treatment plant is required.

A blow molding machine of a container treatment plant, which may for example also include a cleaning machine, filling machine, labeling machine, etc., is used, inter alia, in the beverage industry for the production of hollow bodies. The hollow bodies may in particular be bottles which are produced from preforms (plastic).

For this purpose, the blow molding machine usually has a blow mold in which a preform is introduced and is then inflated by applying air under pressure. Here, the blow mold forms the inflated preform in the finished hollow body. In general, a blow molding process takes place in the blow molding machine in such a way that the preform is first briefly pre-blown and then finally blown with pressurized air at up to 40 bar (40 bar = 4,000 kPa). As compressed air is usually an expensive medium, the cost of such a blow molding process is relatively expensive. The costs are all the more significant, the larger the hollow body to be produced.

DE 10 2009 031 681 A1 describes a blow molding machine and a method for producing hollow bodies, which solves this problem that, when blowing in the preform, a piston is retracted.

Such a blow molding machine and such a method are particularly advantageous for hollow bodies which have an opening for filling the hollow body with a product which is only slightly smaller than the inner diameter of the hollow body, such as a can.

However, there is a need for a solution of the problem mentioned also for hollow bodies whose filling opening is substantially smaller than the inner diameter of the finished hollow body. An example of such a hollow body is a bottle with a capacity of 0.33 liters or more.

In addition, it is required in the production of a hollow body and / or a finished product filled with a hollow body that the time for the production is as short as possible. Therefore, there is a need to further improve known container treatment plants in this regard.

Accordingly, it is an object of the present invention to provide a blow molding machine and a method for producing a hollow body from a preform with a blow molding machine, with which the aforementioned problems can be solved. In particular, a blow molding machine and a method for producing a hollow body from a preform with a blow molding machine are to be provided, with which the costs for the operation of the blow molding machine can be reduced and the time required for producing a hollow body with a blow molding machine can be reduced.

This object is achieved by a blow molding machine according to claim 1. The blow molding machine comprises a blow mold for blow molding a hollow body from a preform, and a filling device for filling a liquid and / or solid medium, which is incompressible during blow molding, before pressurizing the preform with compressed air into the preform and / or into the preform arranged elastic element. The liquid and / or solid medium is a substantially incompressible medium.

The blowing machine can also be used for the production of a hollow body whose filling opening is substantially smaller than the inner diameter of the finished hollow body, such as in a bottle.

In addition, by filling the preform and / or the elastic member with the incompressible liquid and / or solid blow molding medium, the blow molding machine replaces much of the previously necessary preform filling with air. As a result, much less compressed air is required during blow molding, so that the energy consumption of the blow molding machine can be significantly reduced with the stretching device.

With the blow molding machine, the time is not extended compared to conventional blow molding machines, which is required for blow molding a hollow body. Moreover, it is possible with the blow molding machine to shorten the time that is required in total for a production and filling of a hollow body with a finished product in a container treatment plant. Thus, the stretching device can contribute significantly to accelerate the production of a finished filled hollow body.

In addition, the elastic element can be filled in each case depending on the volume of the hollow body to be produced. Thus, for different hollow body and an elastic element of the same design can be used. This simplifies the provision of elastic elements.

Advantageous further embodiments of the blow molding machine are specified in the dependent claims.

The filling device can also be designed to fill the liquid and / or solid medium after a pre-blow molding of the preform into the pre-blown hollow body and / or to fill the liquid and / or solid medium after the pre-blow molding of the preform into the elastic element.

The filling device can also be designed such that the liquid and / or solid medium after blow molding from the elastic element and / or the hollow body is again fed to the filling device.

The blow molding machine may also have a stretching device for stretching the preform, wherein the elastic element is arranged on the stretching device.

It is possible that the elastic element is designed for dispensing at least part of the medium into the hollow body after at least part of the blow molding.

The elastic element may be designed to receive a liquid and / or solid medium which is at least a part of a product with which the hollow body is to be filled. Here, the portion of the product may at least partially contain syrup which is to be mixed with water to form the finished product. Alternatively, the part of the product may be water which is to be mixed with syrup or a syrup mixed with water to form the finished product.

It is also possible that the elastic element is designed to receive a liquid medium which is a sterilizing agent or a coolant or liquid carbon dioxide.

Another alternative is that the elastic element is designed to receive a solid medium having solid elements with or without filling.

The object is also achieved by a method for producing a hollow body from a preform in a blow molding machine according to claim 9. The method has the steps of filling a liquid and / or solid medium, which is incompressible in a blow molding with the blow molding machine, before applying compressed air into the preform of the preform and / or in an elastic element arranged in the preform.

The process achieves the same advantages as previously stated with respect to the blow molding machine.

Advantageous further embodiments of the method are specified in the dependent claims.

The method may further include the step of dispensing at least a portion of the liquid and / or solid medium from the elastic element into the preform or the hollow body before or after at least a portion of the blow molding of the preform.

It is possible that the liquid and / or solid medium, after the blow molding of the elastic element and / or the hollow body, is again supplied to a filling device with which the preform and / or the elastic element has been filled.

Moreover, there is a possibility that the method further comprises the steps of: pre-blowing the preform into a pre-blown hollow body, setting the pre-blown hollow body to a predetermined internal pressure, and then filling the liquid and / or solid medium into the elastic member to complete the hollow body manufacture. Alternatively, the method may comprise the steps of: pre-blowing the preform into a pre-blown hollow body, filling the liquid and / or solid medium into the elastic element, and then increasing the internal pressure of the pre-blown hollow body to complete the hollow body.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

The invention is described in more detail below with reference to the accompanying drawings and to exemplary embodiments. Show it:

1 a simplified schematic view of a container treatment plant with a blow molding machine according to a first embodiment;

2 a schematic partial sectional view of the blow molding machine with a stretching device according to the first embodiment;

3 a further schematic partial sectional view of the blow molding machine with the stretching device according to the first embodiment;

4 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to the first embodiment before a blow molding;

5 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to the first embodiment after a pre-blow molding;

6 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to the first embodiment in a Fertigblasformen;

7 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to the first embodiment after the final blow molding;

8th a schematic partial sectional view of the blow molding machine with a stretching device according to a second embodiment;

9 a further schematic partial sectional view of the blow molding machine with the stretching device according to the second embodiment;

10 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to the second embodiment and its modification prior to blow molding;

11 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to the second embodiment and its modification after a pre-blow molding;

12 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to a modification of the second embodiment in a Fertigblasformen;

13 a simplified schematic partial sectional view of the blow molding machine with the stretching device according to a modification of the second embodiment after a finished blow molding;

14 a simplified schematic view of a usable in the blowing machine liquid and / or solid medium according to a third embodiment;

15 a simplified schematic view of a usable in the blow molding solid medium according to a sixth embodiment; and

16 a detail of an outlet of a stretching device according to a seventh embodiment.

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise.

1 shows a container treatment plant 1 for the treatment of preforms 2 and finished hollow bodies 3 working in the container treatment plant 1 from the preforms 2 can be produced. Both the preforms 2 as well as the finished hollow body 3 are containers associated with the container treatment plant 1 are treatable. The finished hollow body 3 has a mouth 3a and a neck ring 3b , in each case unchanged in this form also on the preforms 2 are present and through the container treatment plant 1 not be changed. The preforms 2 are made of plastic such as polyethylene terephthalate (PET), polypropylene (PP), polyethylene naphthalate (PEN), etc. The finished hollow body 3 For example, bottles can be filled with a product. The product may in particular be a beverage, a cleaning agent, etc. In 1 For clarity, only a few of the preforms 2 provided with a reference numeral.

In 1 has the container treatment plant 1 a first transport device 10 , a second transport device 20 , a third transport device 30 , a heating device 40 , a blowing machine 50 , and a filling machine 60 , The blowing machine 50 also has a variety of blow molds 51 , a compressed air device 52 , and a filling device 53 , In 1 For the sake of clarity, these are just a few of the blow molds 51 provided with a reference numeral. At least the third transport device 30 , the compressed air device 52 , the filling device 53 and the filling machine 60 are in terms of their exact design and their exact arrangement in the blow molding machine 50 shown only very schematically.

The first transport device 10 transports parisons 2 to the heater 40 , In the heater 40 become the preforms 2 heated to a suitable temperature, so that they, after moving from the second transport device 20 to the blowing machine 50 are transported in the blow molds 51 the blowing machine 50 by blow molding into a finished hollow body 3 can be converted. Here are the compressed air device 52 , and the filling device 53 used, as described in more detail below. The third transport means 30 transports the finished hollow body 3 to the filling machine 60 , in which the hollow body 3 ready to be filled with the product.

2 and 3 illustrate the blow molding machine 50 each in a partial sectional view in more detail. As a result, the blower has 50 next to a blow mold 51 for blow molding the finished hollow body 3 , and the compressed air device 52 , the filling device 53 , The filling device 53 has a valve 54 and a reservoir 55 for receiving a liquid and / or solid medium 8th , In addition, the blower has 50 a holding / feeding device 56 for holding a stretching device 57 in the estuary 3a of the preform 2 or the finished hollow body 3 and / or for supplying air to the compressed air device 52 into the mouth 3a when blow molding. The stretching device 57 has in 3 several openings 58 and an elastic element 59 that at the stretching device 57 is appropriate. In 3 For the sake of clarity, not all openings are 58 provided with a reference numeral. About the valve 54 can the product 8th from the reservoir 55 through the openings 58 the stretching device 57 in the elastic element 59 the stretching device 57 be introduced, as by the black arrows at the openings 58 in 3 indicated.

2 shows a state in which one of the heater 40 heated preform 2 with a mouth 3a and a neck ring 3b in the blow mold 51 is introduced. In addition, the stretching device 57 with the help of the holding / feeding device 56 in the estuary 3a and the preform 2 held. Consequently, the stretching device 57 coaxial in the preform 2 arranged and can be the preform 2 stretch in its longitudinal direction. In this condition, this is the stretching device 57 attached elastic element 59 not with a liquid and / or solid medium 8th filled. In the blow mold 51 is in the room around the preform 2 air in this condition. In addition, located in the preform 2 in the room around the stretching device 57 air in this condition. Now via the holding / feeding device 56 additional air with the compressed air device 52 in the preform 3 supplied under pressure, the heated preform 2 inflated.

3 shows a state in which the preform 2 from 2 in the finished hollow body 3 was formed. This was achieved by a certain time at which the preform 2 with the help of the compressed air device 52 supplied air was sufficiently inflated, the liquid and / or solid medium 8th from the filling device 53 in the elastic element 59 was filled, as by the black arrows at the openings 58 in 3 indicated. In the liquid and / or solid medium 8th it is an incompressible medium. More specifically, it is a medium having approximately the same volume at a pressure of a mean atmospheric air pressure or less up to about 40 bar (40 bar = 4,000 kPa) or more.

Alternatively, the state of 3 be achieved by at some point at which the preform 2 has not yet been pressurized with compressed air, with the filling device 53 the incompressible medium 8th in the elastic element 59 contribute. Under a "start of introduction" or "introduction before blowing or stretching the preform 2 "Is understood to be filled in when the stretching device 57 the bottom of the preform 2 not yet touched and consequently no stretching takes place at this time. In particular, at least a portion of the incompressible medium 8th even before the blowing wheel of the blow molding machine 50 by a Vordosagestern not shown in the elastic element 59 be filled.

4 to 6 show the processes during blow molding of the hollow body 3 in the blowing machine 50 more accurate. Here is the blow mold 51 in 4 to 6 a different shape than the blow mold 51 in 2 and 3 , Consequently, the finished hollow body 3 from 4 to 6 a different outer contour than the finished hollow body 3 from 2 and 3 , For the sake of simplicity, the blow molding process is not described in detail for the aforementioned alternative. However, the exact procedure associated therewith results from a superposition of the features of the alternative with the following description of the exemplary embodiments.

4 shows the same state as 2 that is, from the heater 40 heated preform 2 is in the blow mold 51 introduced and for blow molding with the blow molding machine 50 prepared. The preform 2 is not with the liquid and / or solid medium 8th but filled with air.

5 shows a state in which in the preform 2 already with the compressed air device 52 Air was blown. This has resulted in the blow mold 51 a Vorblashohlkörper 4 educated. In this state is neither in the elastic element 59 still in the Vorblashohlkörper 4 the liquid and / or solid medium 8th available.

6 shows a state in which the elastic element 59 over the openings 58 in the stretching device 57 with the liquid and / or solid medium 8th was filled, as by the black arrows at the openings 58 in 6 indicated, and then with the compressed air device 52 Air for final blowing of the hollow body 3 was blown. The amount of the medium 8th in the elastic element 59 depending on the stage of development of the Bottle to be adjusted automatically. The in the elastic element 59 amount of medium to be filled 8th can be based on one in a control of the blowing machine 50 and / or the container treatment plant 1 stored prescriptions are automatically adjusted. For example, the recipe may contain information regarding the size and / or volume of the preform 2 , the size to be developed and / or the volume of the finished hollow body to be developed 3 , etc. include.

7 shows a state in which the elastic element 59 after the blow molding is already partially emptied by the liquid and / or solid medium 8th via at least one outlet opening 59A in the finished hollow body 3 omitted or discharged. This creates the advantage that the bottom of the finished hollow body 3 in the blowing machine 50 through the liquid and / or solid medium 8th is cooled. For cooling the bottom of the finished hollow body 3 has the elastic body 59 preferably a plurality of outlet openings 59A ,

Accordingly, in this embodiment, in the in 4 to 7 illustrated method for producing a hollow body 3 from a preform 2 by blow molding with the blow molding machine 50 an incompressible liquid and / or solid medium 8th in the elastic element 59 added. This medium 8th is after blow molding in the finished hollow body 3 omitted, in other words delivered.

That with the medium 8th filled elastic element 59 thus fills the space in the hollow body 3 and thereby reduces the space occupied by air of the compressed air device 52 has to be filled. As a result, the air requirement is reduced to the final blow, with the compressed air device 52 is to cover. In addition to the function of an air quantity reduction for blow molding, the elastic element 59 but also the function of pre-filling the hollow body 3 with the medium 8th fulfill, as also described in other embodiments.

This embodiment has, inter alia, the advantage that the incompressible liquid and / or solid medium 8th before the end of blow molding only in the elastic element 59 is introduced. This can cause a contact of the medium 8th with the hot plastic of the preform 2 be avoided. This can certainly a recording of taste and / or health-influencing substances from the material of the preform 2 into the medium 8th be avoided.

According to a modification of the first embodiment can with the blow molding machine 50 a method is carried out in which the states of 4 and 5 are present in the same manner as in the first embodiment. In this modification of the first embodiment, however, after the pre-blowing, so after the state of 5 , the pressure for final blowing in the Vorblashohlkörper 4 set to a predetermined pressure, for example, about 25 bar (2500 kPa). Thereafter, the elastic element 59 with the incompressible liquid and / or solid medium 8th by means of the filling device 53 filled. This will cause the deformation of the pre-blown hollow body 4 in the finished hollow body 3 completed. The condition of using the blower 50 finished hollow body 3 corresponds to the in 6 and 7 shown state.

8th and 9 show a blowing machine 50 according to a second embodiment. The blowing machine 50 is largely constructed in the same way as in the first embodiment. In this embodiment, before the blow molding of the hollow body 3 from the preform 2 in a blow mold 51 the blowing machine 50 from the heater 40 heated preform 2 by means of the filling device 53 with the incompressible liquid and / or solid medium 8th filled. As a result, the condition is given as in 8th shown. This is the beginning of introducing the incompressible medium 8th in the preform 2 preferably before acting on the preform 2 by compressed air in the preform 2 , As previously with reference to 3 mentioned is under a "start of introduction" or "introduction before blowing or stretching of the preform 2 "To understand that will begin to fill up when the stretching device 57 the bottom of the preform 2 not yet touched and consequently no stretching takes place at this time. In particular, the incompressible medium 8th even before the blowing wheel of the blow molding machine 50 by a Vordosagestern not shown in the preform 2 be filled. Consequently, in the finished hollow body 3 after completion of the blow molding in the blow mold 51 already the incompressible liquid and / or solid medium 8th present before the incompressible liquid and / or solid medium 8th from the elastic body 59 is omitted, the blow molding of the hollow body 3 in the elastic body 59 was filled. The himself after the finished blowing of the hollow body 3 and before skipping the medium 8th setting condition is the same as in 9 shown state.

10 to 13 show the processes during blow molding of the finished hollow body 3 in the blowing machine 50 more accurate in this embodiment. Here is the blow mold 51 in 10 to 13 the same shape as the blow mold 51 in 4 to 7 , In contrast to 4 to 7 and the related processes according to the first embodiment is in 10 to 13 According to this embodiment, the preform already 2 , of the Vorblashohlkörper 4 and then the hollow body 3 with a predetermined amount of the liquid and / or solid medium 8th filled.

12 and 13 show, however, that in a modification of the second embodiment, the liquid and / or solid medium 8th even before the end of Fertigblasformens from the elastic element 59 is omitted. In 12 is already a Zwischenfertigblashohlkörper in the final blow 5 present, which is already inflated further than the Vorblashohlkörper 4 but not yet the shape of the finished hollow body 3 has reached. In 13 is the incompressible liquid and / or solid medium 8th already before the end of the finished blowing from the outlet opening 59A completely out of the elastic element 59 omitted. This is also supported by the fact that the elastic element 59 also the blowing pressure in the blow mold 51 is suspended and the medium 8th under the additional influence of gravity from the elastic element 59 down into the hollow body 3 is delivered. Otherwise, the blow molding of the hollow body 3 from the preform 2 be carried out in the same manner as in the first embodiment.

The incompressible liquid and / or solid medium 8th For example, in the second transport device 20 into the preforms 2 be filled. Thus, the second transport device 20 also as pre-metering device for that of the heater 40 heated preforms 2 serve. Alternatively, the incompressible liquid and / or solid medium 8th but only in the blowing machine 50 into the preforms 2 be filled.

According to a further modification of the second embodiment, the liquid and / or solid medium 8th also only after the pre-blow molding of the preform 2 , So before the start of the blow-molding or even later, in the Vorblashohlkörper 4 or the Zwischenfertigblashohlkörper 5 be given, so only after the in 11 shown state. In this case, the liquid and / or solid medium 8th even shorter with the hot plastic of the preform 2 in contact, which may further support that no inclusion of flavor and / or health-influencing substances from the material of the preform 2 takes place.

In the remaining parts is the blower 50 constructed in the same manner as described in the first embodiment, so that their description is not repeated here.

According to a third embodiment, the incompressible liquid and / or solid medium 8th a product later for the filling of the hollow body 3 is needed. That is, the filling machine 60 only needs a part of the filling of the hollow body 3 To run. The pre-filling of the hollow body 3 already takes place through the filling device 53 before and / or in the blowing machine 50 as described in the preceding embodiments. As a result, the filling device 53 the filling of the preform 2 in the second transport device 20 To run. In addition, the filling device 53 the filling of the elastic body 59 and / or the preform 2 in the blowing machine 50 To run.

The product may be, for example, a mixed product, especially a juice, etc., made from syrup and water, as in 14 shown. As a result, syrup is a part 81 of the product and water another part 82 a product. The filling device 53 Thus, according to a first variant of this embodiment, the one part 81 of the product, ie syrup, into the elastic element 59 give. According to a second variant of this embodiment, the filling device 53 the elastic body 59 with the other part 82 of the product, ie water.

In the second variant can then in the filling machine 60 the finished mixed product 81 . 82 be supplied from a mixer, not shown. Here, preferably, the mixing ratio of the product from the mixer is adjusted accordingly, since in the hollow body 3 already water is to the mixing ratio of the finished product 81 . 82 as specified.

Depending on the selected variant, the mixing ratio in the filling machine 60 adjust accordingly to the predetermined mixing ratio of the product in the finished filled hollow body 3 to achieve.

Accordingly, in this embodiment, the elastic member 59 preferably selected and configured such that it is suitable for the product, with which the hollow body 3 should be filled. In the event that the product is a food, it is preferable that the elastic element 59 made of a food-grade material. In addition, the material should not give substances to the medium, which affect the taste of the product. The material should therefore be tasteless. In general, the material should comply with additional legal requirements for food for the sick, baby food, etc. In the case of an acidic product, it is advantageous if the elastic element 59 is made of a material which is suitable for receiving such an acidic product. It is beneficial if the acidic product is the elastic one element 59 not destroyed, in particular completely or partially decomposed, etc.

With the blowing machine 50 and their stretching device 57 According to this embodiment, the time can be shortened even more, the total for a production and filling of a hollow body 3 required with a finished product in a container treatment plant, since the hollow body 3 already in the blowing machine 50 is predosed with the product.

In a fourth embodiment, the incompressible liquid and / or solid medium 8th a means which after blow molding in the blow molding machine 50 again from the hollow body 3 Will get removed. This agent can be a liquid. Such a means may be, for example, a sterilizing agent, on the one hand the hollow body 3 and on the other hand also components of the blowing machine 50 such as the stretching device 57 , a blowing nozzle, not shown, on the holding / feeding device 56 , etc., cleans. The sterilizing agent may be, for example, peracetic acid, etc. The agent may also be a sterile liquid, such as sterile water. The Mttel can also be a coolant for cooling the finished hollow body 3 after blow molding. The agent can be in one area after the blower 50 For example, by means of a rinser, not shown again from the hollow body 3 be removed.

Accordingly, also in this embodiment, the elastic element 59 preferably selected and configured such that it is suitable for the medium 8th is suitable, with which the hollow body 3 should be filled.

For example, according to a fifth embodiment, carbon dioxide (CO ₂ ) may be an incompressible liquid and / or solid medium 8th Find use. In this case, the carbon dioxide is (or remains) according to a first variant of this embodiment by itself in the preform 2 fluid pressure buildup. This will make the volume in the preform 2 or the Vorblashohlkörper 4 reduced, which by the compressed air device 52 is to be filled with air. This allows the preform 2 be inflated, wherein relatively less air is consumed. After the pressure during blow molding is reduced, the carbon dioxide evaporates, resulting in cooling by expansion. In this way, the blown hollow body 3 be cooled. Here, the use of other media is conceivable that have similar properties as carbon dioxide.

According to a second variant of the fifth embodiment, the carbon dioxide is in the at the stretching device 57 attached elastic element 59 brought in. Due to the pressure changes, one can selectively use certain phase transitions of the carbon dioxide and, depending on requirements, a volume reduction in the preform 2 prior to blow molding and / or cooling by gas expansion.

Accordingly, also in this embodiment, the elastic element 59 preferably selected and configured such that it is suitable for the medium 8th is suitable, with which the hollow body 3 should be filled.

According to a sixth embodiment, the incompressible liquid and / or solid medium 8th a solid material, such as solid elements 83 , especially spheres, etc., as in 15 shown. The solid material can be in the preform 2 are given. The solid material has the advantage of easy metering. By the addition of liquid-filled elements 83 in the preform 2 after the heater 40 There are no unwanted cooling and / or moisture absorption reactions.

According to a first variant of this embodiment, the fixed elements 83 with a filling 84 filled, with the solid elements 83 in particular, have a solid body made of jelly filled, for example, with syrup, etc. Here, the solid body of jelly in the finished hollow body 3 , especially after filling, dissolve. The solid elements 83 can be designed to be blow molded by the action of the blow mold 51 built-up pressure, and thus as an incompressible liquid for volume reduction of the volume in the blow mold 51 be available. Alternatively, these solid elements 83 only when filling by the connection with another liquid, such as water 82 , etc., to be opened. As a result, the mixing process takes place only when the finished hollow body 3 in the filling machine 60 is filled. However, it is also possible that the solid elements 83 only then open and fill 84 when they are on their way to the end user.

According to a second variant of this embodiment, the solid material is a solid element 83 without filling 84 , which is formed, for example, from starch, gelatin, etc. Such solid elements 83 dissolve when filling in the filling machine 60 in the finished product and are therefore not a disturbing component.

Accordingly, also in this embodiment, the elastic element 59 preferably chosen and configured such that it is suitable for the medium 8th is suitable, with which the hollow body 3 should be filled.

16 shows a detail of the stretching device 57 at its lower portion according to a seventh embodiment. This area is the area which the bottom of the preform 2 and at the end of the blow molding the finished hollow body 3 is facing. The elastic element 59 is here at an outlet 59B with outlet openings 59A arranged with an actuating device 59C can be opened or closed. The outlet openings 59A are here as through holes of the actuator 59C executed. The actuating device 59C For example, may be a check valve, which as needed in the course of the blowing process in the blow molding machine 50 for opening or closing the outlet openings 59A can be operated. This can in particular be time-controlled, sensor-controlled, automatically etc. opened or closed. As a result, the incompressible liquid and / or solid medium 8th depending on your preference in the preform 2 and / or the Vorblaskörper 4 and / or the finished hollow body 3 be delivered. This has the advantage that it is selectively adjustable when the incompressible liquid and / or solid medium 8th in the course of blow-molding with the preform 2 and / or the Vorblaskörper 4 and / or the finished hollow body 3 comes into contact. An omission of the incompressible liquid and / or solid medium 8th In particular, metered can also take place when a pressure acts on the elastic element during blow molding. It is also possible that only one or more than two outlet openings 59A available. Accordingly, in this embodiment, the same advantages as described above with respect to FIG 7 described. In addition, it is simply possible, the stretching device 57 with elastic element 59 after blow molding from the finished hollow body 3 to remove and the elastic element 59 reuse.

In a first variant of this embodiment, the outlet opening (s) is / are 59A the outlet device 59B laterally on the stretching device 57 arranged. That is, the outlet opening (s) 59A is / are here no vertically arranged through hole (s) but arranged in a direction transverse thereto. In a second variant of this embodiment, the outlet device 59B in the upper part of the stretching device 57 arranged.

All previously described embodiments of the blow molding machine 50 , the stretching device 57 , the elastic element 59 and the method can be used individually or in all possible combinations. The features and / or functions and / or advantages of all embodiments can be combined with each other. In addition, the following modifications are conceivable, in particular.

The parts shown in the figures are shown schematically and may differ in the exact embodiment of the shapes shown in the figures, as long as their functions described above are guaranteed.

The stretching device 57 can be a stretch rod. There may also be fewer or more openings 58 , in particular, only one opening 58 , at the stretching device 57 to be available. The shape of the blow mold 51 is arbitrary.

Even if the elastic element 59 in the figures in each case at the stretching device 57 is arranged by the stretching device 57 Enveloped at one end, the elastic element 59 also next to the stretching device 57 be arranged. It is also possible that the blowing machine 50 no stretching device 57 has, so that for the blow molding only the elastic element 59 in the preform 2 is arranged.

The elastic element 59 For example, by increasing the pressure therein, it can be burst in the final blow molding so that the incompressible liquid and / or solid medium contained therein 8th in the finished hollow body 3 can empty and thus in the finished hollow body 3 is delivered. Alternatively, at the stretching device 57 an element may be present, for example in the nature of a drill, a needle, a mandrel, etc., which is the elastic element 59 opens according to a control of a control device, not shown in a region which the bottom of the hollow body 3 at least partially facing, such as at the in 7 and 12 shown opening 59A , In these two cases, the elastic element 59 after the blow molding of a hollow body 3 from a preform 2 through an intact elastic element 59 to replace. Alternatively, the elastic element 59 however, also be opened so that the outlet opening 59A is resealable and the elastic element 59 through the outlet opening 59A not destroyed. In this case, the outlet opening 59A For example, be configured as a valve, in particular mechanically, in particular by means of a pull rope, etc. or automatically, due to a predetermined prevailing pressure during the final blow, time-controlled, sensor-controlled, etc. is opened or closed.

It is also possible that the elastic element 59 after blow molding as a bag in the hollow body 3 remains. In this variant, the elastic element 59 so on the device 57 be appropriate that it is different from the stretching device 57 triggers when a certain pressure in the preform 2 or the Vorblashohlkörper 4 or the finished hollow body 3 is reached or exceeded. In this case, the stretching device 57 before carrying out another blow molding of a hollow body 3 from a preform 2 with a new elastic element 59 to equip.

Will the preform 2 filled with a food before blow molding or blow molding, it is advantageous as a material for the preform 2 and thus for the finished hollow body 3 Polyethylene naphthalate (PEN) to choose. Alternatively, also a preform 2 be selected from a multi-layer material, which is made only in its interior of polyethylene naphthalate (PEN).

The elastic element 59 can be attached to the entire length of the stretching device 57 in the preform 2 be attached below the neck ring. The elastic element 59 can only on a part of the stretching device 57 to be appropriate.

It is also possible that the incompressible liquid and / or solid medium 8th again from the elastic element 59 and / or the finished hollow body 3 is sucked off. For this purpose, the filling device 53 be designed accordingly. In particular, the valve 54 be designed accordingly. It is also possible that a pump, not shown in the line between filling device 53 and blow mold 51 is arranged. This also makes it possible, the stretching device 57 with elastic element 59 after blow molding from the finished hollow body 3 to remove and the elastic element 59 reuse.

The blowing machine described above 50 with the stretching device 57 and the associated method are all the more effective, the larger the hollow body to be produced 3 are. The reason for this is that in conventional blowing machines, the air requirement for blow molding the hollow body 3 proportional to the size of the hollow body to be produced 3 increases. At the blowing machine 50 on the other hand, the air requirement increases with a far smaller factor and depends on the amount of incompressible liquid and / or solid medium used in blow molding 8th ,

LIST OF REFERENCE NUMBERS

1

 Container treatment plant

2

 preform

3

 hollow body

4

 Vorblashohlkörper

5

 Zwischenfertigblashohlkörper

8th

 liquid and / or solid medium

10

 first transport device

20

 second transport device

30

 third transport device

40

 heater

50

 blow molding machine

51

 blow

52

 Compressed air device

53

 filling

54

 Valve

55

 reservoir

56

 Holding / feed

57

 stretching device

58

 opening

59

 elastic element

59A

 outlet

59B

 outlet

59C

 actuator

60

 filling Machine

81

 Part of a product

82

 other part of a product

83

 solid element

84

 filling

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102009031681 A1 [0004]

Claims (13)

Blowing machine ( 50 ), with a blow mold ( 51 ) for blow molding a hollow body ( 3 ) from a preform ( 2 ), and a filling device ( 53 ) for filling a liquid and / or solid medium ( 8th ), which is incompressible during blow molding, before applying the preform ( 2 ) with compressed air in the preform ( 2 ) and / or in a preform ( 2 ) arranged elastic element ( 59 ). Blowing machine ( 50 ) according to claim 1, wherein the filling device ( 53 ) is also configured to fill the liquid and / or solid medium ( 8th ) after a pre-blow molding of the preform ( 2 ) in the Vorblashohlkörper ( 4 ) and / or for filling the liquid and / or solid medium ( 8th ) after the preforming of the preform ( 2 ) in the elastic element ( 59 ). Blowing machine ( 50 ) according to claim 1 or 2, wherein the filling device ( 53 ) is designed such that the liquid and / or solid medium ( 8th ), after blow molding from the elastic element ( 59 ) and / or the hollow body ( 3 ) again the filling device ( 53 ) can be fed. Blowing machine ( 50 ) according to any one of the preceding claims, further comprising a stretching device ( 57 ) for stretching the preform ( 2 ), wherein the elastic element ( 59 ) on the stretching device ( 57 ) is arranged. Blowing machine ( 50 ) according to one of the preceding claims, wherein the elastic element ( 59 ) for dispensing at least part of the medium ( 8th ) in the hollow body ( 3 ) is configured after at least part of the blow molding. Blowing machine ( 50 ) according to one of the preceding claims, wherein the elastic element ( 59 ) for receiving a liquid and / or solid medium ( 8th ), that at least part of a product ( 81 ; 82 ) is, with which the hollow body ( 3 ) is to fill. Blowing machine ( 50 ) according to claim 6, wherein the part ( 81 ) of the product ( 81 ; 82 ) at least partially contains syrup which is added to the finished product with water ( 81 ; 82 ), or where the part ( 82 ) of the product is water, which with syrup or a syrup mixed with water to the finished product ( 81 ; 82 ) is to mix. Blowing machine ( 50 ) according to one of the preceding claims, wherein the elastic element is designed for receiving a liquid medium ( 8th ), which is a sterilizing agent or a coolant or liquid carbon dioxide, or for receiving a solid medium ( 8th ), the fixed elements ( 83 ) with or without filling ( 84 ) having. Method for producing a hollow body ( 3 ) from a preform ( 2 ) with a blow molding machine ( 50 ), with filling of a liquid and / or solid medium ( 8th ), which in a blow molding with the blow molding machine ( 50 ) is incompressible, before applying the preform ( 2 ) with compressed air in the preform ( 2 ) and / or in a preform ( 2 ) arranged elastic element ( 59 ). The method of claim 9, further comprising the step of dispensing at least a portion of the liquid and / or solid medium ( 8th ) from the elastic element ( 59 ) in the preform ( 2 ) or the hollow body ( 3 ) before or after at least part of the blow molding. Process according to claim 9 or 10, wherein the liquid and / or solid medium ( 8th ), after blow molding from the elastic element ( 59 ) and / or the hollow body ( 3 ) again a filling device ( 53 ) is supplied, with which the preform ( 2 ) and / or the elastic element ( 59 ) were / was filled. Method according to one of claims 9 to 11, further comprising the steps after a pre-blow molding of the preform ( 2 ) in a Vorblashohlkörper ( 4 ), Setting the Vorblashohlkörpers ( 4 ) under a predetermined internal pressure, and then filling the liquid and / or solid medium ( 8th ) in the elastic element ( 59 ) to the hollow body ( 3 ) finished. The method of claim 9 to 11, further comprising the steps of pre-blow molding the preform ( 3 ) in a Vorblashohlkörper ( 4 ), Filling the liquid and / or solid medium ( 8th ) in the elastic element ( 59 ), and then increasing the internal pressure of the Vorblashohlkörpers to the hollow body ( 3 ) finished.

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