DE102018126709A1 - Blow molding device comprising a temperature control device - Google Patents

Abstract

Device (1) for reshaping plastic preforms (10) into plastic containers with a mold (2) which has a cavity for the plastic preform (10) to be reshaped, this mold (2) having at least two blow molded parts (22, 24), each said blow molded parts (22, 24) has an inner wall (26) which is suitable for forming an area of the plastic preform to be formed, said blow molded parts (22, 24) being movable with respect to one another between an open position in which the blow molded parts are at least partially separated from one another and a closed position in which the blow mold parts abut one another in order to jointly form the cavity for shaping the plastic preforms (10); preferably at least two blow mold carrier shells (42, 44), one of each of these blow mold carrier shells (42, 44) Blow molded part (22, 24) is fixed - a thermal regulating device (6) of the mold (2), which we at least one heater (62) capable of exchanging heat with the mold; characterized in that the device (1) has a temperature detection device (8) for detecting a temperature of the mold (2), this temperature detection device (8) at least partially in at least one of the blow mold carrier shells (42, 44) or in a carrier device (52, 54), which is used to carry the blow mold carrier shells (42, 44).

Description

The present invention relates to an apparatus and a method for shaping plastic preforms into plastic containers. Such devices and methods have long been known from the prior art. In this process, plastic preforms are first heated and then shaped or blown into plastic containers using a medium, in particular a gaseous medium such as compressed air. Recently, procedures have also become known in which the plastic preforms are expanded directly with a liquid and in particular a beverage to be filled. The present invention relates to the two possible approaches.

Such shaping devices usually have a blow mold that forms the shape or the negative of the container to be produced in its inner wall. This means that the plastic preform is expanded against this inner wall and the resulting container is given the desired shape.

In some processes it is necessary or helpful if the blow mold in question can be tempered and in particular heated. Different procedures are known for heating. For example, it is known that this heating of the blow molded parts is carried out using a temperature control medium, for example hot oil or hot water. It is also known in the prior art to carry out heating using electrical energy.

Several options are also known for electrically heating blow molds. One possibility known from the applicant's internal prior art is the use of thin layers of electrical resistors. This layer is applied directly to the surface of the negative form of the container to be produced and thus heats exactly the area of the form that has to be heated so that the hot material does not stick to the form. It is also advantageous that the thin heating layers enable good control and rapid temperature changes can be made.

In addition, it is also possible for heating layers to be supported by one or more other layers, for example by an electrical insulating layer.

Furthermore, it is for example from the DE 10 2010 00689831 it is known that a device for heating containers has at least one electric heating element for heating the blow mold. These heating elements are located in cavities in which they are at least partially surrounded by a fluid-type heat exchanger.

From the WO2016 / 166437 A1 a container forming unit is also known. This unit has heating elements in the carrier shells of the blow molded parts. Furthermore, a probe is provided which is provided in the blow molding parts in order to measure the temperature in the vicinity of the inner wall of the blow molding part.

The present invention has for its object to provide an improved production of containers, especially for hot-filled or hot-to-beverages.

One method that does not provide electrical heating elements would be to use fluids to temper the blow mold, such as oil or pressurized water. A large number of machines are already in use on the market which use such liquids for tempering the molds. The advantage of using oil or water is that, in contrast to the use of electrical heating elements, relatively few components are usually required and that the technology behind it has already been proven to work reliably.

However, the devices and methods described above have the disadvantage that, on the one hand, thin heating layers are required and these require a negative form for each product, which is coated with this heating layer and an auxiliary layer. The performance of these layers is also limited. Another disadvantage of these layers is that they require a supply line.

This means that cables have to be unplugged and then plugged in each time the mold is changed. Empirical experience has shown that there is a potential risk in later use, for example that unconcentrated workers forget to wire the cables and run the risk of tearing out cables or cable sockets or otherwise not plugging them in and without starting up the machine .

The above-mentioned disadvantage of damaging the machine by tearing out objects is theoretically always present when the heating elements or the temperature sensors are inside the mold or on the mold. It should also be noted that there is too much when plugging in and unplugging the supply lines increased wear due to careless work.

In addition, the time required to change the shape is extended by each individual cable or hose. The more components that need to be exchanged or wired for a change of shape, the more time is required, and accordingly the lower the economic profit, since the machines do not produce during this time.

In machines known from the prior art, which have heating elements, temperature sensors are also provided. These temperature sensors are usually arranged within the blow molded parts themselves and, due to the disadvantages mentioned above, are not always ideal. On the other hand, these temperature sensors perform an important task in order to enable precise temperature control. If you were to temper the blow molds with a liquid, such as oil or water, you would have the advantage that you would get by with a single temperature sensor. On the other hand, the occurrence of leaks is problematic in these configurations. This can lead to contamination of the machine, which in turn requires cleaning.

It is also unfavorable to have a risk of contamination in the manufacture of containers for liquid food, as this could worsen the image of the manufacturer. In the worst case, there could also be health damage to end consumers. In addition, there is also the danger that the escape of hot liquid and in particular hot oil or hot pressurized water will result in injuries to the machine operators.

The present invention is therefore also based on the object of providing a method or a device which has electrical heating elements and also preferably has one or more temperature sensors which nevertheless enable the temperature of the blow molds to be measured satisfactorily. According to the invention, these objects are achieved by the subject matter of the independent claims.

Advantageous embodiments and further developments are the subject of the dependent claims.

A device according to the invention for reshaping plastic preforms into plastic containers has a shape which has a cavity for the plastic preform to be reshaped, this shape having at least two blow molded parts, each of these blow molded parts having an inner wall which is suitable for forming an area of the plastic preform to be reshaped and wherein these blow mold parts are movable relative to one another between an open position in which the blow mold parts are at least partially separated from one another and a closed position in which the blow mold parts abut one another to jointly form the cavity for shaping the plastic preforms.

Furthermore, the device preferably has at least two blow mold carrier shells, a blow molded part, preferably detachably, being attached to each of these blow mold carrier shells. It is pointed out here that in certain configurations, the blow mold carrier shells can also be dispensed with if the blow mold parts are arranged directly on a blow mold carrier.

The applicant therefore reserves the right to claim protection for designs that do without the blow mold carrier shells mentioned.

Furthermore, however, the device according to the invention has a thermal regulating device of the form, which in turn has at least one heating device which is suitable for exchanging heat with the form.

In an embodiment according to the invention, the device has a temperature detection device for detecting a temperature of the mold, this temperature detection device being arranged at least partially in at least one of the blow mold carrier shells or in a carrier device which serves to carry the blow mold carrier shells.

In this embodiment, it is therefore proposed that the temperature detection is not arranged in the blow mold parts themselves, but in their carrier shells or the blow mold carrier device. In this way, when the blow molds are changed, an exchange of the sensor devices is not necessary at the same time, so that in particular certain cabling can remain.

In a further alternative, but also according to the invention, the heating device is arranged at least in sections and preferably completely in at least one blow molded part. In this embodiment, it is therefore proposed that the heating element is arranged in the blow molding part itself, in order to ensure direct heating of the blow molding device.

It is pointed out that the two embodiments according to the invention described here can both be used independently of one another and can also be combined with one another. It would therefore also be possible to combine the two configurations with one another, that is to say to arrange both the heating elements in the blow mold parts and the temperature detection device in the blow mold carrier shells and / or the blow mold carriers.

In the first embodiment, it is therefore proposed that a sensor device be present, but that it is not arranged in the blow mold itself. In a further preferred embodiment, the device has blow mold supports, on each of which the blow mold parts are at least indirectly mounted. It is possible for these blow mold parts to be mounted directly on the blow mold carriers, but it would also be possible for these blow mold parts to be arranged on the blow mold carriers indirectly, that is to say in particular via the blow mold carrier shells mentioned above.

In a preferred embodiment, these two blow mold supports are pivotable with respect to one another for opening and closing the blow mold. In a further advantageous embodiment, the blow molds can also have base parts. These base parts can also preferably be temperature-controlled. It is possible that heating elements are arranged in the bottom parts themselves, or in a carrier device which carries the bottom part. Two side parts and the base part preferably form a blow mold or the cavity for reshaping the plastic preforms.

In a further advantageous embodiment, the blow molds are arranged on a blow mold carrier. It is thus possible for a plurality of blow molds, in particular including holders, to be arranged on this carrier. This movable carrier is particularly preferably a rotatable carrier.

In a further advantageous embodiment, the device has a plurality of temperature detection devices. In this case, for example, one temperature detection device per blow mold side part could be provided. However, a plurality of such sensor devices or temperature detection devices are preferably provided per blow molded part or per blow mold carrier shell. In this way, the temperature can be determined in several areas of the blow molded part. A plurality of temperature detection devices can be provided in a circumferential direction of the plastic preform to be expanded, as well as in the corresponding longitudinal direction of the plastic preforms.

In a further preferred embodiment, it is possible for the temperature detection device to protrude into the blow molding. However, the sensor device preferably does not protrude into the respective side part.

The invention thus comprises a device for producing containers using a blow molding / stretching process, in particular for the production of containers which are to be filled with a medium which has a temperature. As mentioned above, the device comprises, inter alia, a mold with two side parts or mold halves, in which the container is formed from a preform. The shape is tempered with electrical heating elements. The heating elements are arranged in particular in the mold itself, or in an area between the mold and the mold carrier shell, or also in the mold carrier shell.

It is possible for the heating elements to be arranged parallel to a central axis of the mold.

In a further preferred embodiment, the device has at least two heating devices, preferably at least three heating devices and particularly preferably four heating devices per side part or mold half.

If the heating elements are attached within the side parts, it would be advantageous if the connections of these heating elements or heating devices are automatically plugged in and unplugged when the shape changes, for example via a plug connection or a contact connection or a contact surface with the power supply. On the side part or on the mold or on each of the mold halves there is preferably a part of the plug or a first contact surface, as described in more detail below.

A mating connector and / or a second contact surface is preferably located on the blow molding station or forming station, for example on the mold carrier shell. This is also described in more detail below.

Due to the shape, the contact between the counterparts is automatically established or separated when the shape changes.

This type of contact connection would be advantageous in the case of an automatic change of shape, for example by means of a changing device, such as a changing robot. A special feature of this embodiment is the arrangement of the temperature measuring device. This is not in the form as in the prior art described above attached, but is preferably located in the mold carrier shell or at least in this area. It can preferably fulfill its function in that it is arranged in a bore, for example, in order to be able to reach the side parts of the mold and measure the temperature with the aid of a spring or a pneumatic or hydraulic cylinder or a similarly acting means.

This is preferably at least one temperature sensor, preferably at least one per mold half. In one embodiment, the heating device can be a heating mat, for example, or a heating tape, a heating tape or the like. As mentioned above, the heating element can either be part of the blow mold or be located between the blow mold and the mold carrier shell or also be part of it.

The heating element is particularly preferably located directly on the mold, so that a high thermal output is achieved.

A combination of the first heating element, for example the heating mat with a second heating element, is also possible. This second heating element could have a circuit which is used for tempering the mold. This cycle could include a fluid such as oil, water, gel-like substances, mixtures and the like.

Attaching several heating elements opens up more options for temperature control, since heating elements can be used for different purposes. Examples of this would be a rough or fine adjustment of the temperature or, on the other hand, an improved possibility of temperature control in different areas of the product to be manufactured.

In addition, it would also be conceivable for a heating system to act as a “starting aid” in order to bring the mold to the desired working temperature more quickly. In addition, it would also be conceivable that, in particular if the heating element is a fluid or a fluid line, it is kept at a lower temperature in order to enable a cooling effect instead of a heating effect so that, for example, a temperature is reached more quickly which a change of form is possible.

In a preferred embodiment, the device therefore also has cooling elements for cooling side parts of the blow mold. These cooling elements can be both electrical elements, such as Peltier elements, but it would also be conceivable that the cooling elements are designed as fluid cooling circuits.

By using the electrical heating elements, the above-mentioned disadvantages of oil and pressurized water are eliminated, since no leaks or contamination can occur here. The arrangement of the heating elements within the mold carrier shell or between the mold carrier shell and the mold increases the distance between the heating elements and the heating mold, but this ensures that the supply lines for the heating elements do not have to be removed and inserted when the mold is changed.

By placing the heating elements inside the blow mold, the distance is minimized and good heating performance is achieved. By automatically making contact via a contact surface or a plug when changing the shape, the shape change process itself is accelerated, since no manipulations are necessary for connecting the lines. There are also fewer components to consider during the changeover process, which in turn is simplified and therefore less susceptible to operating errors.

If, as mentioned above, the temperature sensor is attached outside the blow mold, the number of components to be observed when changing the mold is also reduced as mentioned above and the risk of danger decreases and the mold changing process is accelerated. In this way, it can also be achieved that the form changes take place more quickly and the machine can start production again more quickly.

Various advantages can be achieved through the above-mentioned possibility of combining different heating elements. Thus, as mentioned above, the operating temperature could be reached more quickly, by actuating or heating with all the heating elements. In addition, an energy-saving version would also be conceivable, in which, for example, both heating elements are used for rough adjustment of the temperature, and the heating elements, for example a heating mat, are used as a means for fine adjustment of the individual temperature zones.

By using heating mats or the like, better regulation of the temperature zones would preferably be possible, since individual areas can be controlled separately.

In this way, the desired temperatures can be reached relatively easily at certain locations in the blow mold, and preferred properties and configurations of the product to be manufactured, that is to say the container, can also be achieved in this way. By attaching heating elements to the Form and / or in the vicinity thereof, the distance to the negative form is relatively small.

Accordingly, it is possible that less energy is wasted and the heating time until the desired temperature can also be reduced.

In a further advantageous embodiment, the temperature detection device contacts at least a section of at least one blow molded part. As mentioned above, a plurality of temperature detection devices are preferably provided. It is preferably conceivable that several of these temperature detection devices and preferably all of these temperature detection devices contact at least a section of a blow molded part or also a plurality of sections of both or all blow molded parts. The temperature detection in its entirety is therefore particularly preferably suitable and determines that temperatures of several regions of the blow mold are measured.

In a further advantageous embodiment, the at least one heating device is arranged in at least one blow molded part and / or a blow mold carrier shell. It is possible for the heating device, as mentioned above, to be arranged exclusively in the blow molding part, but it could also be arranged exclusively in the carrier shell. In a further preferred embodiment, at least one heating device is arranged between the blow mold carrier part and the blow mold carrier shell and / or between a blow mold carrier part and a blow mold part arranged thereon.

In a further advantageous embodiment, the temperature regulation device mentioned above has a control device which controls and / or regulates the at least one heating device as a function of at least one value detected by the temperature detection device.

Such control and / or regulation is particularly preferably carried out as a function of the output values of a plurality of temperature measuring devices. It would also be possible to assign one or more heating devices to the area covered by a specific temperature measuring device, so that zone-by-zone heating of the blow molded parts is possible.

In a particularly preferred embodiment, this regulating device has a control loop.

In a further advantageous embodiment, the device has a pretensioning means which urges the temperature detection device in the direction of at least one blow molded part. It would thus be possible for the temperature detection device to be biased in the direction of a blow molded part.

Furthermore, it would also be possible for the temperature detection devices to be arranged in a region which are spaced far apart from the respective ends of the blow molding in the circumferential direction. In an assembled state, the temperature measuring devices are particularly preferably arranged in a largely central region of the blow molded parts.

In a further embodiment, it would additionally or alternatively also be possible for the blow molded part to have a bore, in particular a blind hole, in which a temperature is measured without contact. It would thus be possible for the temperature detection device to be designed, for example, as a pyrometer, which can measure a temperature over a predetermined distance, for example through a blind hole. This blind hole could be designed in such a way that it is insulated in its circumferential direction, but the closed end of the blind hole is not insulated, so that its temperature can also be measured without contact and over a certain distance.

It would also be possible for a temperature-conducting means or a heat-conducting element to be provided in the blow-molded part in its radial direction, that is, starting from the inner wall of the blow-molded part, for example a material which conducts heat very well. In this way, the temperature of the inner wall can be determined very comfortably over a certain distance at the outer end of this temperature control means by means of the temperature measuring device.

This heat-conducting element is preferably arranged between at least one region of a side part and the temperature detection device.

In a further advantageous embodiment, as mentioned above, the device has contacting means with which, for example, the sensor device and / or the heating devices can be supplied with electrical energy and or in order to electrically connect the heating device.

The above-mentioned heat conducting means is particularly preferably arranged between at least one region of the side part and the temperature detection device.

The present invention is further directed to an arrangement for forming plastic preforms into plastic containers with a plurality of devices of the type described above. These devices are arranged on a movable and in particular rotatable carrier. In this embodiment, the rotatable carrier is in particular a so-called blowing wheel, which is used to deform the plastic preforms into the plastic containers. As mentioned above, this shaping can take place both with a gaseous medium and with a liquid medium and in particular the product to be filled.

In a further advantageous embodiment, the device has a feed device in order, in particular, to feed plastic preforms to said carrier or the individual shaping devices. In a further advantageous embodiment, the device also has a discharge device, such as, in particular, a discharge star, in order to discharge the manufactured containers from the forming devices.

In a further advantageous embodiment, the device has an energy distributor, in particular to distribute electrical energy to the individual devices arranged on the carrier. In particular, energy for supplying the heating devices can be distributed to the individual devices. This energy distributor can be, for example, a so-called slip ring, which is arranged on a rotating part of the device and to which the energy is supplied via corresponding contacts. In addition, energy can also be supplied inductively, for example by arranging magnetic coils on the blowing wheel, which are supplied by stationary permanent magnets.

In a further advantageous embodiment, the device has a central control and in particular a central control of the individual devices described above and in particular for their temperature control.

In a further advantageous embodiment, at least one first contact element is arranged on the blow molded part in order to electrically connect the heating device. This contact means can be, for example, a plug-in element, but also an, for example, metallic contact surface which can be contacted by a mating contact. At least two electrical contact elements are advantageously arranged on the blow molded part. It would also be conceivable for a plurality of heating elements to be arranged in the blow molded part and for each of these heating devices to be electrically connected via contact elements.

In a further advantageous embodiment, the at least one electrical contact element is arranged on a surface facing the blow mold carrier shell in a state in which the blow molding part is mounted on the blow mold carrier shell. If there is no blow mold carrier shell, the at least one electrical contact element can be arranged on a surface facing the blow mold carrier.

In a further preferred embodiment, a second electrical contact element is arranged on the blow mold carrier shell, which in an assembled state, that is to say in a state in which the blow molded part is arranged on the blow mold carrier shell, is in electrically conductive contact with the first electrical contact element. In this way, for example, the heating devices can be supplied with electrical energy.

However, it would alternatively or additionally also be possible for corresponding contact elements to be arranged on the blow mold carrier itself, in particular if the blow mold parts are provided directly on the blow mold carrier. In addition, it would also be conceivable that contact pins or the like which extend through the carrier shells are provided on the blow mold carrier.

In a preferred embodiment, at least one of the two contact elements is pretensioned in particular by means of a spring device, and preferably in an assembled state in the direction of the other contact element. For example, contact elements can be provided on the blow mold carrier shells that are prestressed in the direction of the contact elements in the blow mold parts.

In a further advantageous embodiment, the contacts between these contact elements can be automatically released and / or closed.

Electrical connections between these contact elements of the heating element or the heating device are particularly preferably automatically detachable and / or separable and / or also connectable. In particular, changing devices such as changing robots can be used, which also automatically establish or separate these electrical connections.

As mentioned above, the device particularly preferably has at least one and particularly preferably a plurality of temperature detection devices for detecting a temperature in the mold or molds.

In a further advantageous embodiment, this temperature detection device is at least partially arranged in one of the blow mold carrier shells or a carrier device which serves to carry the blow mold carrier shells. In this way, too, it can be achieved that no electrical connections have to be disconnected when changing the blow molded parts. This also makes it easier to change the blow mold.

In this way, the device can be adapted very precisely to the needs of the respective machine manufacturer. In the case of manufacturers who wish to change the blow mold frequently, it can be provided that the heating devices and / or the temperature detection devices are each arranged in the carrier shells or in the carrier part, in order in this way to reduce the contacts to be electrically disconnected and connected. If, conversely, the manufacturer rarely needs to change the blow mold, it can be advantageous if, for example, both the heating devices and the temperature detection devices are arranged in the blow mold part and are each electrically connected.

In a further advantageous embodiment, the temperature detection device does not protrude into the blow molded parts.

In a further advantageous embodiment, the temperature detection device is suitable and determined to determine a temperature of at least a region of the blow molded parts.

The present invention is further directed to a method for forming plastic preforms into plastic containers by means of a mold which has a cavity for the plastic preform to be molded, this mold having two blow molded parts and each of these blow molded parts having an inner wall which forms a region of the plastic preform to be molded .

These blow molded parts can be moved or are moved with respect to one another between an open position in which the blow molded parts are at least partially separated from one another and a closed position in which the blow molded parts lie against one another in order to form the cavity for reshaping the plastic preforms. Furthermore, at least two blow mold carrier shells are preferably provided, a blow molded part, preferably detachably, being attached to each of these blow mold carrier shells and a heating device heating the mold at least temporarily.

In an embodiment according to the invention, a temperature detection device detects a temperature of the mold and / or at least a region of the mold, this temperature detection device being arranged at least partially in one of the blow mold carrier shells or in a carrier device which serves to carry the blow mold carrier shells and / or the blow mold parts.

In a further (additional or alternative) embodiment according to the invention, the heating device is arranged at least in sections and preferably completely in at least one blow molded part. In this way, the blow molded part is heated here by means of a heating device which is arranged in the blow molded part itself.

• Darin zeigen:
  • 1 eine erfindungsgemäße Vorrichtung in einer ersten Ausführungsform;
  • 2 eine erfindungsgemäße Vorrichtung in einer zweiten Ausführungsform; und
  • 3 eine erfindungsgemäße Vorrichtung in einer dritten Ausführungsform.

In a further preferred method, a device as described above is used. Further advantages and embodiments result from the attached drawings:

• In it show:
  • 1 a device according to the invention in a first embodiment;
  • 2nd a device according to the invention in a second embodiment; and
  • 3rd a device according to the invention in a third embodiment.

1 shows an illustration of a forming station according to the invention 1 in a first embodiment. There are two blow mold carrier parts 52 and 54 intended. These blow mold carrier parts 52 and 54 are pivotable with respect to each other in order to open and close the blow mold in this way. On the blow mold carrier parts 52 and 54 are each blow mold switch 42 and 44 arranged. These blow mold carrier shells or their parts, for example, on the blow mold carrier parts 52 and 54 (also generally referred to above as the carrier device). The reference number 36 relates to a sealing device and the reference symbol 34 on a mounting plate.

On the blow mold carrier shells 42 and 44 are the blow molded parts 22 and 24th arranged. The plastic preform 10th is against here through the side panels 22 and 24th formed form pressed or against the inner wall 26 . The blow molded parts 22 , 24th are components of the form marked with 2.

The reference number 8th indicates a temperature sensor. Two temperature sensors are provided here, each in the blow mold carrier shell 42 and 44 are provided, however, with their end sections in the blow molded parts 22 and 24th extend.

The reference numbers 62 refer to heating elements or heating devices that are here in the blow molded parts 22 respectively. 24th are arranged. These heating elements 62 can be rod-shaped or pin-shaped and here extend perpendicular to the plane of the figure and / or perpendicular to the longitudinal direction of the plastic preforms.

The reference number 6 schematically relates to a regulating device for the shape 2nd , more precisely for a temperature of the blow molded parts 22 , 24th . This regulating device has at least the heating device 62 , the temperature detection device or the temperature sensor 8th and a control and / or regulating device (only shown schematically) 66 on.

By in 1 arrangement of the heating elements shown results in a very small distance d between the heating elements and the hollow body or plastic preform 10th .

The reference numbers 35 refer to insulations which are spaced apart from one another in the circumferential direction.

Furthermore, the blow molded parts have 22 and 24th Contact elements on to the heaters 62 to contact or to supply with electrical energy. These electrical connections can be made when changing the blow mold or blow mold parts 22 and 24th automatically disconnected and reconnected.

2nd shows a further embodiment of a device according to the invention. In this embodiment, there is the in 1 Embodiment shown the main difference in that here the heating devices 62 not in the blow molded parts 22 and 24th are arranged, but in the blow mold carrier shells 42 , 44 . In this way, the distance is indeed d between the heaters and the hollow body 10th significantly larger than in 1 shown embodiment. The advantage, however, is that no electrical connections have to be disconnected or closed when the blow molded parts 22 , 24th be replaced.

The reference number 32 indicates a channel through which a coolant can flow. In this way, cooling of the blow molded parts is also possible. As mentioned above, an exact temperature of the blow molded parts can also be achieved in this way 22 and 24th and the bottom part (not shown).

3rd shows a further embodiment of a device according to the invention. In this embodiment there is a first heater 62 provided in the form of a heating mat, which here between the blow mold side parts 22 and 24th and the carrier shells 42 and 44 is arranged. In this way, the distance increases d between the plastic preform 10th and the heating elements compared to in 1 shown embodiment, but decreases compared to that in 2nd shown embodiment. It is also possible that the heating mat 62 on the mold carrier shells 42 and 44 remains. However, the heating mat is also advantageously arranged on the blow mold and is therefore exchanged with it.

The reference numbers 64 refer to second heaters here in the blow mold carriers 52 and 54 are arranged. In this way, as mentioned above, heating can be carried out more quickly by using all heating devices.

At the in 3rd The embodiment shown are the temperature measuring devices 8th essentially within the blow molded parts 22 and 24th arranged. In this way, a more immediate measurement of the temperature of the inner wall of the blow molding device can be carried out 2nd can be achieved.

In contrast, the in 2nd Embodiment shown, the temperature measuring device essentially in the blow mold carrier shells 42 and 44 arranged and contacted as in the case of 1 shown embodiment the blow mold side parts 22 and 24th .

The applicant reserves the right to claim all of the features disclosed in the application documents as essential to the invention, provided that they are new to the prior art, individually or in combination. It is further pointed out that features that may be advantageous in themselves were also described in the individual figures. The person skilled in the art immediately recognizes that a certain feature described in a figure can be advantageous even without the adoption of further features from this figure. The person skilled in the art also recognizes that advantages can also result from a combination of several features shown in individual or in different figures.

Reference list

1

Forming station

2nd

shape

6

Regulator

8th

Temperature measuring device, sensor

10th

Plastic preform

22, 24

Blow molded parts

32

channel

34

Mounting plate

35

insulation

36

Sealing device

42, 44

Carrier shells

52, 54

Carrier facilities

62

Heating device

66

Control device

d

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included 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.

Patent literature cited

• DE 10201000689831 [0006]
• WO 2016/166437 A1 [0007]

Claims (10)

Device (1) for reshaping plastic preforms (10) into plastic containers with a mold (2) which has a cavity for the plastic preform (10) to be reshaped, this mold (2) having at least two blow molded parts (22, 24), wherein each of these blow molded parts (22, 24) has an inner wall (26) which is suitable for forming an area of the plastic preform to be formed, these blow molded parts (22, 24) being movable relative to one another between an open position in which the blow molded parts are at least partially separated from one another and in a closed position in which the blow molded parts abut each other to jointly form the cavity for reshaping the plastic preforms (10); - preferably at least two blow mold carrier shells (42, 44), a blow mold part (22, 24) being detachably fastened to each of these blow mold carrier shells (42, 44); - A thermal regulating device (6) of the mold (2) which has at least one heating device (62) which is suitable for exchanging heat with the mold; characterized in that the device (1) has a temperature detection device (8) for detecting a temperature of the mold (2), this temperature detection device (8) at least partially in at least one of the blow mold carrier shells (42, 44) or in a carrier device (52, 54), which is used to carry the blow mold carrier shells (42, 44). Device (1) after Claim 1 , characterized in that the temperature detection device (8) is suitable and determined to determine a temperature of at least a region of the blow molded parts (22, 24). Device (1) according to at least one of the preceding claims, characterized in that the temperature detection device (8) contacts at least a portion of at least one blow molded part (22, 24). Device (1) according to at least one of the preceding claims, characterized in that the at least one heating device (62) is arranged in at least one blow mold part (22, 24) and / or a blow mold carrier shell (42, 44). Device (1) according to at least one of the preceding claims, characterized in that the regulating device (6) has a control device (66) which the at least one heating device (62, 64) in dependence on at least one value detected by the temperature detection device (8) controls. Device (1) according to at least one of the preceding claims, characterized in that the device has a biasing means which urges the temperature detection device (8) in the direction of at least one blow molded part (22, 24). Device (1) according to at least one of the preceding claims, characterized in that the heating device is an electrically operated heating device. Device (1) according to at least one of the preceding claims, characterized in that the device has a heat-conducting element which is arranged between at least a region of the side part and the temperature detection device (8) Arrangement for shaping plastic preforms (10) into plastic containers with a plurality of devices (1) according to at least one of the preceding claims, wherein these devices are arranged on a movable and in particular rotatable carrier. Method for forming plastic preforms (10) into plastic containers by means of a mold (2) which has a cavity for the plastic preform (10) to be formed, and which mold (2) has two blow molded parts (22, 24), each of these blow molded parts (22 , 24) has an inner wall (26) which forms a region of the plastic preform to be formed, these blow molded parts (22, 24) with respect to one another between an open position in which the blow molded parts are at least partially separated from one another and a closed position in which the Blow mold parts abut each other in order to jointly form the cavity for reshaping the plastic preforms; and preferably at least two blow mold carrier shells (42, 44) are provided, a blow mold part being detachably fastened to each of these blow mold carrier shells (42, 44); and a heater (62) at least temporarily heats the mold; characterized in that a temperature detection device (8) detects a temperature of the mold (2), this temperature detection device (8) at least partially in at least one of the blow mold carrier shells (42, 44) and / or in a carrier device (12, 14) which is used for Carrying the blow mold carrier shells is arranged.

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