DE202013104120U1 - Device for forming plastic preforms into plastic containers with asymmetric blow-mold opening movement - Google Patents

Abstract

Device (1) for forming plastic preforms (10) into plastic containers (10a) with at least one blowing station (8) arranged on a movable carrier (2), this blowing station (8) having a blow mold carrier (6) for holding a blow mold (4a, 4b) and this blow mold carrier (6) has a first blow mold carrier part (6a) and a second blow mold carrier part (6b) which is pivotable relative to the first blow mold carrier part (6a) with respect to a predetermined first pivot axis (Y) to move the blow mold (4a, 4b and wherein the blowing station (8) further comprises a locking mechanism (80) for locking the first blow molding support member (6a) with respect to the second blow molded support member (6b) and the locking mechanism (80) at least indirectly locking the first Blasformträgerteil (6a) arranged locking element (82) and a second at least indirectly on the second Blasformträgerteil (6b) arranged Verr in a locked state of Blasformträgerteile (6a, 6b), the locking elements (82, 84) cooperate, wherein at least the first locking element (82) with respect to a second predetermined axis (X) relative to the carrier (2) movable characterized in that in order to open and close the blow mold, the first blow mold carrier part (6a) is pivotable by a first predetermined angle and the second blow mold carrier part (6b) is pivotable through a second angle, the first angle and the second Angle differ from each other and wherein the pivoting movement of the first Blasformträgerteils (6a) and the movement of the first locking element (82) are feasible such that these movements by a common mechanism (95) can be generated.

Description

The present invention relates to an apparatus for forming plastic preforms into plastic containers. Such devices have been known for a long time from the prior art. In this case, plastic preforms are usually formed in a large number of blow molding stations by applying compressed air to plastic containers. As part of the expansion process, a large number of adjacent movement processes takes place. Thus, usually the blow mold carrier halves are unfolded to introduce a plastic preform and then folded to perform the expansion process can. After completion of the expansion process, the Blasformträgerteile be unfolded again so as to remove the finished blown plastic container can. In the closed state of Blasformträgerteile, especially during the expansion process, in addition, the Blasformträgerteile be locked together so as to withstand the significant pressures can.

Furthermore, sterile applications are known from the prior art, in which the individual blow molding stations are guided within a clean room. For example, in the WO 2010/020529 A2 a device for forming plastic preforms to plastic containers described which comprises a plurality of blowing stations comprehensive transport device and a clean room.

By means of the clean room, aseptic conditions can be ensured during the production of the plastic containers and also during their filling with beverages.

The object of WO 2010/020529 A2 is hereby incorporated by reference in its entirety into the subject of the present disclosure.

In some countries guidelines are set for such aseptic treatments. For example, in the US, such guidelines are established and monitored by the FDA (Food and Drug Administration).

As mentioned above, one important component of a blowing station is the locking mechanism that locks or locks the two mold support halves together during the blowing process. After completion of the blowing process, the lock opens. The bottle can be removed after opening the mold and a new preform can be introduced. In the prior art, this locking mechanism usually has a locking shaft which is mounted in one of the two mold carriers. Several distributed over the height of the mold carrier bearings ensure a uniform force distribution in the components. This is important because the latch has to hold a holding force of several thousand N. The locking process consists for example of a rotational and / or a linear movement of the lock. This movement is usually generated by a stationary, attached to the basic structure of the machine curve and forwarded via different deflections to the locking shaft.

The opening and closing movement of the mold carrier is independent of this and controlled separately. Since both mold carrier halves are opened by the same angle in the prior art, they are mechanically connected via different levers and deflections. The control is via a curve. So you need for the entire control two curves, one to control the two mold carrier halves and one to control the lock.

The present invention is therefore based on the object to simplify the Ansteuermechanismen for such blow molding machines. This is inventively achieved by a device according to claim 1. Advantageous embodiments and further developments are the subject of the dependent claims.

A device according to the invention for converting plastic preforms into plastic containers has at least one blowing station arranged on a movable carrier, this blowing station having a blow mold carrier for holding a blow mold and this blow mold carrier having a first blow mold carrier part and a second blow mold carrier part which faces the first blow mold carrier part with respect to a predetermined blow mold the first pivot axis is pivotable to open and close the blow mold and wherein the blowing station further comprises a locking mechanism to lock the first Blasformträgerteil relative to the second Blasformträgerteil. Furthermore, the locking mechanism has a first at least indirectly on the first Blasformträgerteil arranged locking element and a second at least indirectly arranged on the second Blasformträgerteil locking element, wherein cooperate in a locked state of Blasformträgerteile the locking elements and wherein at least the first locking element with respect to a second predetermined axis relative to the Carrier is movable.

According to the invention, in order to open and close the blow mold, the first blow mold carrier part pivotable about a predetermined first angle and the second Blasformträgerteil pivotable about a second predetermined angle, wherein the first angle and the second angle differ from each other and further the pivotal movement of the first Blasformträgerteils and the movement of the first locking element are feasible such that these movements by a common mechanism can be generated.

By the producibility of the movements by a common mechanism is meant in particular that at least one element of this mechanism causes both the movement of the locking element and the movement of the Blasformträgerteiles. Preferably, at least one of the two movements is a pivoting movement and preferably both movements are pivotal movements. Preferably, these movements are at least temporarily coupled together. In particular, said mechanism is a mechanical mechanism. This mechanism preferably has a lever with which a pivot shaft for pivoting the first locking element can be pivoted. Furthermore, this mechanism preferably has at least one cam roller which is arranged on this lever.

In contrast to the prior art, it is therefore proposed that the mold opening of the mold carrier or Blasformträgerteile is designed asymmetrically.

In this case, preferably one side or a blow mold carrier part is pivoted away more than the opposite side. Preferably, the movements of the Blasformträgerteils and the movements of the locking element are at least partially coupled together. This is to be understood that at least one element of the above mechanism at least temporarily performs or causes both movements. However, it is possible that these movements can be carried out one behind the other. Advantageously, however, the movements of the two Blasformträgerteile be controlled separately. This is particularly advantageous since these movements take place around different pivoting angles.

In a further advantageous embodiment, the first Blasformträgerteil and the second Blasformträgerteil are pivotable with respect to the same pivot axis. In this way, a particularly convenient opening and closing of the blow mold can be achieved.

In a further advantageous embodiment, the device has at least one stationary guide curve, which causes both a pivoting of the first Blasformträgerteils and a pivoting of the first locking element. By means of this guide curve so that these two movements can be coupled and / or performed together. As mentioned above, two movements are required to open and close the blow mold, namely the pivoting of the one mold carrier or blow mold carrier part and the pivoting of the locking shaft. These movements are, as mentioned above, effected by a common mechanism.

The advantage of these embodiments is that these mentioned two movements can be controlled with only one curve. It is thus possible to perform the movements of the mold carrier independently.

Preferably, said guide cam has a guide groove or consists of derselbigen in which extends at least one element of the mechanism for generating the movement of the locking element and the Blasformträgerteils. Advantageously, this element is a guide roller that can run in said groove. This means that the guide roller is guided by the guide groove in both perpendicular to the direction of movement directions.

Advantageously, the guide groove at least partially on a curved course. Advantageously, the guide groove is formed kink-free.

In a further advantageous embodiment, a geometric profile of the guide groove has at least one inflection point. This means that a curvature of the guide groove changes at least once in its course. In this way, several successive movements can be carried out by means of the same guide groove. The said geometric course of the guide groove preferably extends in a transport plane of the blowing stations. In particular, the transport plane extends at least at one point through the cam roller or cuts the cam roller or in a plane parallel thereto. In particular, this is a plane which extends perpendicular to the axis of rotation of the blowing wheel. The axis of the cam roller is in particular perpendicular to the transport plane. This means in particular that the cam roller preferably moves in the transport plane or a plane parallel thereto.

In a further advantageous embodiment, the geometric profile of the guide groove has at least two turning points. The geometric profile preferably has an at least sectionally sinusoidal or wave-shaped or sinusoidal profile.

In a further advantageous embodiment, the guide curve during an opening movement of the blow mold first causes a pivoting movement of the locking element and then a pivoting movement of Blasformträgerteils on which this locking element is arranged. Due to the temporal sequence, an opening of the blow mold can be achieved in a particularly simple manner.

In a further advantageous embodiment, said mechanism for performing the two movements on an eccentric element or an eccentric bearing.

Furthermore, said first locking element is advantageously arranged via a pivot shaft on an eccentric element and in particular an eccentric bearing. In this case, this locking element is advantageously arranged via a lever and in particular a release lever on this eccentric bearing.

In a further advantageous embodiment, the first locking element is mounted axially and / or radially. To unlock and open the mold carrier or Blasformträgerteile the blowing station can be approached against a locally fixed curve. This will be explained in more detail below with reference to the figures. The axial bearing of the locking shaft stiffened the entire construction in addition. The described separate movement of the mold carrier and the axial bearing of the locking shaft leads to a low-vibration system, which also has an advantageous effect at higher speeds.

In a further advantageous embodiment, the common mechanism has two guide curves. In this case, a guide curve can be arranged stationary and the other guide curve movable. Advantageously, the other guide curve is arranged on the blowing station. It is particularly possible that this other guide curve is in turn arranged to be movable on the blowing station. Advantageously, this second guide curve causes a movement of the mold carrier part.

Advantageously, the pivoting movements of the first blow mold carrier part and the movements of the first locking element (in particular by means of a coupling device) are coupled together such that at least temporarily during a movement of the first locking element with respect to the second predetermined axis, the second predetermined axis in a direction perpendicular to the second axis Direction towards the carrier moves.

An at least indirect arrangement of the respective locking element on the Blasformträgerteil is understood that this locking element z. B. is arranged directly on the respective Blasformträgerteil or for example on a further element or component, against which the respective Blasformträgerteil (stationary) is fixed. For example, a locking element could be arranged fixedly in relation to the carrier and the blow mold carrier part associated therewith could also be arranged fixedly in relation to the carrier.

It is conceivable that a locking element is arranged rigidly relative to the respective Blasformträgerteil and the other defined movable, z. B. pivotable. Advantageously, however, at least one locking element is arranged directly on the associated Blasformträgerteil and more preferably, both locking elements are each arranged on their associated Blasformträgerteilen.

In a further advantageous embodiment, the second predetermined axis is a pivot axis and the first locking element is relative to this preferably stationary relative to the first Blasformträgerteil arranged second pivot axis pivotally.

Advantageously, this (pivot) axis also moves said first locking element, which, as mentioned above, is advantageously pivotably arranged with respect to the said pivot axis. Advantageously, the movable support is a rotatable support, such as a blowing wheel. In a further advantageous embodiment, a plurality of such blowing stations is arranged on this support.

In a further advantageous embodiment, the first locking element is movable along the axis. In this embodiment, the first locking element could be a rod-like or bolt-like body which is displaced in its longitudinal direction, for example to engage in corresponding recesses or sleeve-like bodies for the purpose of locking.

In a further advantageous embodiment, the coupling device which couples the (pivoting) movement of the first blow molded carrier part and the first locking element to one another is a mechanical coupling device, ie the two said pivoting movements and the displacement movements are mechanically coupled to one another. Thus, the pivoting movement of the locking element and the pivoting movement of the first Blasformträgerteils coupled together by a common mechanism.

In a further advantageous embodiment, the device has a clean room separated with at least one wall from an environment, within which the blowing station is moved. This embodiment is particularly relevant for an aseptic blowing machine in which the blowing station is transported within said clean room. In an advantageous embodiment of the clean room is at least partially formed by the said carrier. Thus, the carrier may advantageously have a C-shaped outer profile, within which at least partially the individual blow molding stations are arranged. Advantageously, the above-mentioned coupling device is arranged outside the clean room, for example below the clean room.

In a further advantageous embodiment, the second Blasformträgerteil is pivotable with respect to a predetermined pivot axis. In a particularly advantageous embodiment, the first mold carrier part and the second mold carrier part are pivoted about a common geometric axis. However, it would also be possible for the pivot axis about which the first blow molding support part is pivoted to be parallel to the pivot axis about which the second blow molded support part is pivoted. Advantageously, these pivot axes extend parallel to a longitudinal direction of the plastic preform to be expanded.

In a further advantageous embodiment, the first Blasformträgerteil is pivotable about a first predetermined pivot angle and the second Blasformträgerteil is pivotable about a second predetermined pivot angle and the second pivot angle is greater than the first pivot angle.

Thus, the blow mold is opened asymmetrically and advantageously the movement of the first Blasformträgerteils only serves to release a bottom part of the blow mold and the movement of the second Blasformträgerteils for removing the plastic containers. Advantageously, the first Blasformträgerteil is pivoted by an angle which is between 1 ° and 10 °, preferably between 1 ° and 8 °, preferably between 2 ° and 8 ° and particularly preferably between 4 ° and 6 °.

Preferably, the locking shaft is mounted in or on the Blasformträgerteil which is pivoted at the lower angle. This must perform a rotational movement after closing the two mold halves and thus lock the two blow mold carriers.

Advantageously, the second Blasformträgerteil is pivoted by an angle which is between 20 ° and 60 °, preferably between 30 ° and 50 °, preferably between 35 ° and 45 ° and particularly preferably at about 40 °. Advantageously, a pivot shaft defining the pivot axis extends through a wall, which in particular also limits the clean room, and the movements of the pivot shaft are particularly preferably sealed by means of a sealing device.

For this purpose, said wall advantageously has a passage opening through which the pivot shaft extends. In this case, the pivot shaft relative to this opening is advantageously not only rotatable, but also movable perpendicular to the said axis. The sealing device is advantageously arranged on the one hand on the shaft and on the other hand on the said wall. In this case, this sealing device is advantageously able to absorb both rotational movements by a predetermined angle and (sliding) movements of the pivot shaft in a direction perpendicular to the pivot shaft direction. Advantageously, the sealing device is made of a plastic. Advantageously, the pivot shaft along a curved path relative to the carrier is movable.

In a further advantageous embodiment, the coupling device has a lever for pivoting the Blasformträgerteils with respect to the second pivot axis. This lever advantageously extends at least partially in a direction perpendicular to the pivot shaft direction. In this case, for example, a cam follower can be arranged on this lever, which can cooperate with a guide curve, which in particular is arranged in a stationary manner.

However, other types of drive would be conceivable, such as electric motors, pneumatic drives, hydraulic drives and the like.

Further advantages and embodiments will be apparent from the attached drawings:
Show:

1 a schematic representation of a plant for the production of plastic containers;

2 a view of a clean room in the area of a blowing station;

3a a blowing station according to the prior art;

3b a detailed representation of in 3a designated device;

4 a schematic representation of a blowing station according to the invention;

5 the blowing station off 4 in an open state;

6 the blowing station off 4 in a view from below with a guide curve;

7 the blowing station off 4 with a guide curve;

8th the blowing station off 4 with a guide curve;

9 a further embodiment of a blowing station according to the invention;

10 the blowing station off 9 with a guide curve;

11 a detailed view of in 9 blow station shown.

1 shows a schematic representation of a plant for producing plastic containers. This plant 50 has a heater 30 on, in the plastic preforms 10 to be heated. These are plastic preforms 10 by means of a transport device 34 , as here a circulating chain, by this heater 30 guided and with a variety of heating elements 31 heated. To this heater 30 closes a transfer unit 36 on which the preforms 10 to a sterilization device 32 passes. This sterilization device 32 here also has a transport wheel 37 on and on this transport wheel 37 or even stationary sterilization elements can be arranged. In this area, for example, a sterilization by hydrogen peroxide gas or by electromagnetic radiation is possible. In particular, an internal sterilization of the preforms is carried out in this area.

The reference number 20 in its entirety denotes a clean room whose outer boundaries are indicated here by the dotted line L. In a further preferred embodiment, the clean room 20 not only in the area of the transport wheel 2 and filling device 40 but may already start in the area of the heater 30 , the sterilization device 32 , the plastic preform feed and / or the plastic preform manufacture. It can be seen that this clean room 20 in the area of the sterilization unit 32 starts. In this area, lock devices can be provided to move the plastic preforms into the clean room 20 without causing too much gas to flow within the clean room and thus be lost.

The clean room is, as indicated by the dashed line L, adapted to the outer shape of the individual plant components. In this way, the volume of the clean room can be reduced.

The reference number 1 in its entirety denotes a forming device in which on a transport wheel 2 a plurality of blowing stations or forming stations 8th is arranged, with only one of these blowing stations 8th is shown. With these blow stations 8th become the plastic preforms 10 to containers 10a expanded. Although not shown in detail here, the entire area of the conveyor is not located 2 within the clean room 20 but the clean room 20 or insulator is effectively implemented as a mini-isolator within the entire device. So it would be possible that the clean room at least in the area of the forming device 1 is executed channel-like.

The reference number 22 refers to a feeder, which the preforms to the forming device 1 passes and the reference number 24 to a discharge device, which produced the plastic containers 20 from the forming device 1 dissipates. It can be seen that the clean room 20 in the area of the feeder 22 and the discharge device 24 each having recesses which these facilities 22 . 24 take up. In this way, in a particularly advantageous manner, a transfer of the plastic preforms 10 to the forming device 1 or a takeover of the plastic containers 10a from the forming device 1 be achieved.

With a transfer unit 42 The expanded plastic containers are to a filling device 40 passed and from this filling device 40 then via another transport unit 44 dissipated. This is also the filling device 40 within the said clean room 20 , Also in the case of the filling device, it would be possible that not the entire filling device 40 with, for example, a reservoir for a beverage completely within the clean room 6 are arranged, but also here only those areas in which the containers are actually performed. In that regard, the filling device could be constructed in a similar manner as the device 1 for forming plastic preforms 10 ,

As mentioned, the clean room is 20 in the field of the device 1 reduced to a minimum possible range, namely essentially on the blowing stations 8th itself. Through this small-scale design of the clean room 20 It is easier and faster possible to produce a clean room at all and also the sterility in the operating phase is less expensive. Also, less sterile air is needed, resulting in smaller filter units and also the risk of uncontrolled vortex formation is reduced.

2 shows a detailed view of the device 1 in the area of a blowing station 8th , A variety of such blowing stations 8th comes with a transport device 2 or a carrier rotates about an axis X moves. The blowing station 8th is how in 2 visible, within the clean room 20 , which is designed channel-like, led out. This clean room 20 is completed by a movable side wall 19 and one piece with this side wall 19 trained lid 17 , This sidewall 19 and the lid 17 turn it with the blowing station 8th With.

The reference number 18 refers to another wall, which is the clean room 16 limited. This wall 18 Here is an outer wall, which is arranged stationary. Between the lid 17 and the wall 18 is a sealing device 25 provided, which the mutually movable elements 17 and 18 seals against each other, for example, as mentioned above, using a moated castle. The lower part of the wall 18 is firm and sealing on a ground 13 arranged. Inside the clean room 20 and here directly on the wall 19 abutting is a carrier 26 provided, which also moves in rotation and on which in turn a holding device 23 is provided, which the blowing station 8th holds.

The reference number 11 refers to a follower, which by a guide curve 9 can be pressed to the blowing station on its way through the clean room 6 to open and close, in particular to insert the plastic preform in the blowing station and to remove it again. Here is a guide curve 9 also within the clean room 20 arranged. However, it would also be possible for example to already have a section 11 below the individual blowing stations 8th from the clean room 20 lead out.

The transport device 2 may have other elements which above the clean room 20 are arranged.

The carrier 26 is firmly on a holding body 29 arranged and this holding body is in turn movable relative to the ground 13 , In this case, the reference numeral refers 27 to a further sealing device, which also in this area a seal of the mutually movable areas 13 and 29 causes.

The reference number 5 refers to a stretch rod that is movable with respect to the blow molding station around the plastic preforms 10 to stretch in their longitudinal direction. It is on the lid 17 a sledge here 12 arranged, on the other hand, the stretch rod is movable in the direction Y. The reference number 21 refers to another bracket for this slide 12 the stretch rod 5 ,

It can be seen that certain areas of the stretch rod during the blowing process both outside of the clean room 20 as well as within the cleanroom 20 are. For this purpose it is possible outside the clean room 20 or above the carriage 12 To provide a protective device such as a bellows, the stretch rod 5 surrounds, leaving no area of the stretch rod 5 immediately comes into contact with the outside environment. The reference symbol U denotes the (non-sterile) environment of the clean room 20 , The reference number 28 indicates a carrier for supporting a bottom mold, which also forms part of the blow mold 4 formed. This carrier is also movable in the direction Y.

The reference number 55 refers to a sterilization device, which preferably here in the interior of the clean room 20 is arranged and for sterilizing the individual transformation stations or components of these conversion stations 8th serves. This sterilization device 55 can do the forming stations 8th For example, apply hydrogen peroxide or other sterilizing agent. In this case, the sterilization device 55 be stationary and the conversion stations can be compared to this sterilization device 55 move. This sterilization device or loading device 55 can be at the transport wheel 2 or on the standing wall 18 be located or generally stationary and consist of nozzles o similar. In addition, it is advantageous sterile air to sterilize the clean room 20 via the ventilation system in the clean room 20 contribute.

The blow molds (not shown) are within the blow mold carriers 6 arranged. More precisely, two Blasformträgerteile can be arranged, which are pivotable relative to each other and each holding a blow mold. By this pivoting process, the blow molds for introducing plastic preforms and for removing finished blown containers can be opened. These blow mold carriers and blow molds are likewise arranged inside the clean room.

It would, however, be different (unlike in 2 shown) possible and preferred that the transport device 2 or the carrier has a C-shaped outer circumference, which also partially forms the outer walls of the clean room. This turns this C-shaped clean room wall with the transport device 2 ie the blowing wheel. In this embodiment, the lower boundary of the clean room is from the floor 13 spaced and moves relative to the ground. In this way, the clean room can be made even smaller than in 2 shown. A seal of this C-shaped profile of the transport device, which here forms both an inner wall and a lower and upper cover of the clean room, preferably takes place here only with respect to the outer wall of the clean room. This outer wall is advantageously arranged stationary.

3a shows a blow station according to the prior art. This blow station has a first Blasformträgerteil 6a and a second blow mold carrier part 6b open, which can be opened and closed. The reference number 54 indicates a blowing nozzle for expanding the plastic preforms.

On the first blow mold carrier part 6a is a first locking element 82 arranged pivotally. On the second Blasformträgerteil 6b is a second locking element 84 arranged. In a closed state, the first locking element engages 82 with an engaging portion 86 in the second locking element 84 one.

The reference number 120 indicates an actuating mechanism for moving the locking element.

3b shows a detailed representation of in 3a shown device. It can be seen that the actuating mechanism 120 a cam roller 122 which rolls against a guide cam (not shown). The reference number 124 schematically indicates a latching mechanism that causes the latching element to latch into either the closed or the open position.

4 shows a transformation station according to the present invention. This conversion station has a blow mold carrier 6 with two Blasformträgerteilen 6a and 6b on. At these Blasformträgerteilen may (possibly by means of a Blasformträgerschale not shown), a (not shown) blow mold may be arranged.

The reference number 80 indicates in its entirety a locking mechanism. This locking mechanism has here a first locking element 82 on which at the first Blasformträgerteil 6a is arranged and a second locking element 84 , To lock these two locking element engage 82 and 84 into each other, for which purpose the first locking element 82 is pivoted with respect to a pivot axis X. The two blow molded carrier parts 6a and 6b can be pivoted with respect to the pivot axis Y.

The reference number 20 refers again to a clean room and the reference number 62 denotes a lever arm for pivoting the second Blasformträgerteils 6b serves. In this case, as mentioned above, this second Blasformträgerteil pivoted by a comparatively large angle such as 40 °. The reference number 106 indicates an opening through which, for example, for expanding the plastic preforms, a bottom part (in the direction of the axis Y) can be delivered.

The reference number 90 indicates a pivot shaft, which for pivoting the first locking element 82 serves. Below the wall or floor plate 104 that includes the clean room 20 limited, is a drive lever 94 (hereinafter also referred to as a lever for short) arranged on which in turn a cam roller 98 is arranged. Furthermore, an eccentric bearing 96 provided in which the lever 94 also runs. The eccentric bearing 96 is again advantageous to the bottom plate 104 arranged or preferably attached thereto.

5 shows a representation of in 4 shown forming station 8th in an open state. So here is the second Blasformträgerteil 6b folded away and also the first Blasformträgerteil 6a slightly pivoted as well as the first locking element 82 in an open state.

The following 6 - 8th illustrate the opening and closing of the blow mold. In 6 is again the transformation station 8th but shown from below. The reference number 60 indicates a guide curve, which is arranged stationary. This guide curve 60 has a groove 63 on or consists of derselbigen, in which the leadership role 98 on the lever 94 is arranged to run. At the same time, however, the lever also extends in the eccentric bearing 96 or a groove 96a , In this way, the combined movement of the pivotal movement of the locking element 82 and the pivotal movement of the Blasformträgerteils 6a be achieved. Thus, two movements are achieved here simultaneously or in succession, namely a pivoting of the first Blasfromträgerteils 6a for example, 5 ° and a pivoting of the locking shaft. The lever 94 and the eccentric bearing 96 as well as the cam roller 98 and the fixed guide curve 60 thus form the common mechanism 95 . which generates these movements or are components of this mechanism 95 ,

The locking shaft 90 or the locking element 82 is with the lever 94 at the eccentric camp 96 attached. In this way, as mentioned above, the entire locking unit is mounted axially and radially. To unlock and open the mold carrier is the blowing station 8th against the local solid curve 60 hazards. Here is the position of the lever 94 selected so that at the beginning of this curve or the guide groove 63 a pure rotational movement of the first locking element 82 or the lock 90 in particular takes counterclockwise and so the mold carrier is unlocked. This is in the 6 and 7 illustrated. However, the direction of rotation also depends on the viewing direction

In the further course of this first section (cf. 7 ), however, becomes the lever 94 by his position also the first Blasformträgerteil 6a pull in the opening movement. In the final phase of the guide groove 63 (shown here only shortened and without a rectilinear section, which ensures that the blow mold remains in an open state), the eccentric moves 96 the same way back and the Blasformträgerteil is swung back again and again by pivoting the locking element 82 locked. Instead of one guide curve shown, two guide curves could be provided, one of these guide curves opening and the other guide curve causes a closing of the blow mold.

8th shows a corresponding situation at the end of the guide 63 in which the blow mold is closed and locked again.

9 shows a further embodiment of this coupling or the mechanism. In this embodiment, no eccentric bearing is provided, but a second guide roller 198 , This second leadership 198 runs on a second turn 192 which is not arranged stationary, but at the forming station 8th , In other words, here's the lever 94 a dual role provided. The axial reception of the locking roller 98 can by hooking this leadership role 198 for example, take place in a groove curve. To unlock and open the Blasfromträgerteils or the mold carrier here two differently arranged curves are necessary. A curve is, as mentioned above, stationary arranged, for example, on the machine frame and starts the movement on the guide roller 98 of the lever 94 , This performs a movement towards the center of the machine and thus rotates the locking shaft 90 again counterclockwise. After unlocking, the second guide roller engages 198 that prefers a common shaft with the first guide roller 98 stored in a co-rotating, attached to the blowing station curve 192 , This further curve 192 performs the opening movement of the first Blasformträgerteils 6a through, as in 10 illustrated.

11 shows a detailed view showing the start of the second guide roller 98 at the second guide curve 192 shows. About this second guide curve 192 the 5 ° opening movement of the first Blasformträgerteils is effected. Closing and locking the forming station 8th takes place in reverse order.

LIST OF REFERENCE NUMBERS

1

forming device

2

Transport wheel

4

blow

4a, b

blow molded parts

5

stretching rod

6

blow mold

6a

first blow molded part

6b

second blow mold carrier part

8th

Blowing / forming stations

9

guide curve

10

The plastic preforms

10a

containers

11

follower

12

carriage

13

ground

14

support tray

17

cover

18

another wall

19

Side wall

20

cleanroom

21

Holder for sled

22

feeding

23

holder

24

removal device

25

seal means

26

carrier

27

further sealing device

28

Carrier for carrying a floor mold

29

holding body

30

heater

31

heating elements

32

sterilization device

34

transport means

36

Transfer unit

37

Transport wheel

40

filling device

42

Transfer unit

44

transport unit

50

Plant for the production of plastic containers

54

blow nozzle

55

sterilization device

60

guide curve

62

lever arm

63

guide

80

locking mechanism

82

first locking element

84

second locking element

86

engaging portion

90

pivot shaft

92

opening

94

lever

95

mechanism

96

eccentric

96a

groove

98

follower

99

seal means

102

inner wall

104

Bottom wall / floor plate

106

opening

120

actuating mechanism

122

follower

124

latching

192

guide curve

198

leadership

L

dotted line

U

unsterile environment

X

swivel axis

Y

swivel axis

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

• WO 2010/020529 A2 [0002, 0004]

Claims (23)

Contraption ( 1 ) for forming plastic preforms ( 10 ) to plastic containers ( 10a ) with at least one on a mobile support ( 2 ) arranged blowing station ( 8th ), whereby this blowing station ( 8th ) a blow mold carrier ( 6 ) for holding a blow mold ( 4a . 4b ) and this blow mold carrier ( 6 ) a first Blasformträgerteil ( 6a ) and a second blow mold carrier part ( 6b ), which opposite the first Blasformträgerteil ( 6a ) is pivotable relative to a predetermined first pivot axis (Y) to the blow mold ( 4a . 4b ) and to close and close the blow station ( 8th ) further comprises a locking mechanism ( 80 ) to the first Blasformträgerteil ( 6a ) relative to the second blow molded part ( 6b ) and the locking mechanism ( 80 ) a first at least indirectly on the first Blasformträgerteil ( 6a ) arranged locking element ( 82 ) and a second at least indirectly on the second Blasformträgerteil ( 6b ) arranged locking element ( 84 ), wherein in a locked state of Blasformträgerteile ( 6a . 6b ) the locking elements ( 82 . 84 ), wherein at least the first locking element ( 82 ) with respect to a second predetermined axis (X) with respect to the carrier ( 2 ) is movable, characterized in that in order to open and close the blow mold, the first Blasformträgerteil ( 6a ) is pivotable about a first predetermined angle and the second Blasformträgerteil ( 6b ) is pivotable about a second angle, wherein the first angle and the second angle differ from each other and wherein the pivotal movement of the first Blasformträgerteils ( 6a ) and the movement of the first locking element ( 82 ) are such that these movements are controlled by a common mechanism ( 95 ) are producible. Contraption ( 1 ) according to claim 1, characterized in that the first Blasformträgerteil ( 6a ) and the second blow molded part ( 6b ) are pivotable with respect to the same pivot axis (Y). Contraption ( 1 ) according to at least one of the preceding claims, characterized in that a blow mold carrier part ( 6a . 6b ) is pivotable about a pivot angle which is between 20 ° and 60 °, preferably between 30 ° and 50 ° and particularly preferably between 35 ° and 45 °. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that a blow mold carrier part ( 6a . 6b ) is pivotable about a pivot angle which is between 2 ° and 20 °, preferably between 2 ° and 10 ° and particularly preferably between 3 ° and 7 °. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the blow mold carrier part ( 6a ), on which the first locking element ( 82 ) is arranged to pivot at a smaller angle than the other Blasformträgerteil ( 6b ). Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the device ( 1 ) a stationary guide curve ( 60 ), which both a pivoting of the first Blasformträgerteils ( 6a ) as well as the first locking element ( 82 ) causes. Contraption ( 1 ) according to claim 6, characterized in that the guide curve ( 60 ) a guide groove ( 63 ) consists of or derselbigen, in the at least one element ( 98 ) of the mechanism for generating the movement of the locking element ( 82 ) and the Blasformträgerteils runs. Contraption ( 1 ) according to claim 7, characterized in that the guide groove ( 63 ) has a curved course at least in sections. Contraption ( 1 ) according to claim 7, characterized in that a geometric profile of the guide groove has at least one inflection point. Contraption ( 1 ) according to claim 6, characterized in that the guide curve during an opening movement of the blow mold, first a pivoting movement of the locking element ( 82 ) and then a pivoting movement of the Blasformträgerteils ( 6a ), on which the locking element ( 82 ) is arranged causes. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the common mechanism is an eccentric bearing ( 96 ) having. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the first locking element ( 82 ) via a pivot shaft ( 90 ) is arranged on an eccentric bearing. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the first locking element ( 82 ) is mounted axially and / or radially. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that on one of the first locking element ( 82 ) arranged levers ( 94 ) are arranged two guide rollers. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the common mechanism comprises two guide curves ( 60 . 192 ) having. Contraption ( 1 ) according to claim 15, characterized in that one of the guide curves ( 60 ) is arranged stationary and the other guide curve ( 192 ) is movably arranged. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that at least temporarily during a movement of the first locking element ( 82 ) with respect to the second predetermined axis (X), the second predetermined axis (X) in a direction perpendicular to the second axis (X) direction relative to the carrier ( 2 ) emotional. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the device ( 1 ) a with at least one wall with respect to an environment (U) separated clean room ( 20 ), within which the blowing station ( 8th ) is moved. Device according to at least one of the preceding claims, characterized in that the second predetermined axis (X) is a pivot axis (X) and the first locking element (X) 82 ) with respect to this preferably stationary with respect to the first Blasformträgerteil ( 6a ) arranged second pivot axis (X) is pivotable. Device according to at least one of the preceding claims, characterized in that the first locking element ( 82 ) is movable along the axis (X). Contraption ( 1 ) according to claim 18, characterized in that the mechanism ( 95 ) outside the clean room ( 20 ) is arranged. Device according to at least one of the preceding claims, characterized in that a pivot shaft defining the pivot axis (X) ( 90 ) extends through a wall and the movements of the pivot shaft ( 90 ) by means of a sealing device ( 99 ) are sealed. Contraption ( 1 ) according to at least one of the preceding claims, characterized in that the device comprises a lever ( 94 ) for pivoting the Blasformträgerteils with respect to the first pivot axis (X).

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