DE102024104166A1 - Flow element for an injection molding system - Google Patents

Abstract

The invention presented relates to a flow element (100) for an injection molding system (300), wherein the flow element (100) comprises a base body (101), a drive interface (103) for engagement of a drive (105) and a channel (107) formed in the base body (101) for conducting flowable mass, wherein the base body (101) has an inlet opening (111) at a first end (109) for introducing flowable mass into the channel (107), wherein the base body (101) has an outlet opening (115) at a second end (113) for discharging flowable mass from the flow element (100) into a cavity (307), wherein the outlet opening (115) is formed offset to a rotation axis (117) of the base body (101), and wherein the base body (101) is connected by the drive interface (103) is rotatable about its axis of rotation (117).

Description

The presented invention relates to a flow element, a dosing system, an injection molding method and an injection molding system according to the appended claims.

In injection molding, a flowable material, such as plastic, is injected under high pressure into a cavity and formed into a molded article (preform). Shut-off valves are often used to control the volume flow of flowable material into the cavity. These valves are mounted longitudinally in a valve-gate nozzle and can open or close the outlet for metering the flowable material into the respective cavity.

When the valve pins are actuated, high pressures within the injection molding system and the drive exert high forces on them. Consequently, they must be guided very precisely within the valve gate nozzles, especially in the area of the respective outlets, so that each pin can always be inserted centrally and tightly into the outlet with its free end. Furthermore, precise guidance with tight tolerances prevents the escape of flowable material from the respective injection molding system.

As a result, wear on the valve pins is very high, leading to high maintenance costs. The pin drive is mechanically complex and costly.

Needle stroke and needle control or needle position must be precisely adjusted and coordinated, which increases the control and setup effort.

Against this background, it is an object of the invention presented to provide a possibility for the reliable and inexpensive provision of a molding by an injection molding process.

Main features of the invention are defined in the characterizing part of claim 1. Further embodiments are the subject of the further claims.

In a flow element for an injection molding system, with a base body, a drive interface and a channel formed in the base body for conducting flowable mass, it is provided according to the invention that the base body has an inlet opening at a first end for introducing flowable mass into the channel, that the base body comprises an outlet opening at a second end for discharging flowable mass from the flow element into a cavity of the injection molding system, wherein the outlet opening is formed offset by a distance from a rotational axis of the base body, and wherein the base body is rotatable about its rotational axis via the drive interface.

The flow element presented here is used to meter or introduce flowable material into a cavity of the injection molding system, which is designed, for example, as an injection molding tool, in order to form a molded part in the cavity. Accordingly, the flow element can be, for example, a nozzle, in particular a hot runner or cold runner nozzle.

In particular, the flow element can be made of metal.

The flow element comprises a channel for conducting flowable material. Flowable material is directed through the inlet opening into the channel, through the channel to the outlet opening, and finally into a respective cavity.

The core concept of the flow element is that the outlet opening is offset from the rotational axis of the base body, in particular off-center in the base body, so that the outlet opening changes its position relative to the rotational axis when the flow element is rotated about its rotational axis. This means that the outlet opening is not fixedly positioned at a predetermined location, e.g., above a cavity, as in known flow elements, but rather its position relative to the rotational axis and, consequently, relative to a respective cavity, is variable.

This makes it possible to open and close a nozzle, specifically a hot runner or cold runner nozzle, installed in an injection molding system and in which the flow element is installed as a type of nozzle orifice, simply by rotating the flow element. The wear previously caused by longitudinally displaceable valve pins and their sealing elements can be completely eliminated with the solution according to the invention.

From a design perspective, it is advantageous if the outlet opening is formed at the end of a bore that continues the channel in the base body. Particularly preferably, the outlet opening is formed opposite the inlet opening. This allows the flowable mass to be fed directly into the cavity.

According to a further development of the invention, the bore with the outlet opening is arranged at an angle oblique to the axis of rotation of the base body arranged, i.e., the bore can be inclined at an angle to the axis of rotation. Accordingly, the shape or arrangement of the bore and the outlet opening can define a flow path for the flowable mass.

The outlet opening is preferably aligned with an end face of the base body. This allows the flow element to be sealed easily and efficiently within the injection molding system. It is also advantageous if the end face of the base body is arranged perpendicular to the base body's rotational axis.

The invention further provides that the outlet opening and the channel are arranged or formed offset from the rotational axis of the base body, at least in some areas or sections. This allows the flow conditions within the flow element to be further optimized, and the cavity to which the flow is directed can always be reliably opened and closed.

The drive interface is configured to rotate the base body around its rotation axis when a counter interface engages.

The drive interface and the counter interface are preferably part of a drive, which can be located inside or outside the injection molding system. Consequently, the position of the outlet opening of the flow element can be changed using simple and cost-effective means, thus opening or closing the nozzle.

Due to the variable position of the outlet opening, the outlet opening can be moved between a first position in which the outlet opening is located above a cavity or in fluid-conducting contact with a cavity, and a second position in which the outlet opening is not in fluid-conducting contact with the cavity.

For example, the second position can be a position in which the outlet opening is closed by a blocking element, so that no flowable mass can escape from the outlet opening. Accordingly, a volume flow of mass flowing through the flow element can be adjusted, i.e., controlled or regulated, by a movement of the flow element, in particular by a movement of the outlet opening. The blocking element can be a suitable section, shoulder, or projection in the tool.

Because the adjustment, i.e. in particular a stopping or releasing of the volume flow of mass flowing through the flow element is carried out by a movement of the flow element itself or its base body, a needle and a corresponding needle drive for adjusting the volume flow of mass flowing through the flow element can be dispensed with using the presented flow element.

To move or rotate the flow element, the flow element comprises a drive interface into which a drive or actuator, such as a motor, can intervene directly or indirectly, for example via a counter interface in the form of a mechanical transmission.

The drive interface can be formed as a single piece or monolithically in or out of the base body or can be applied to the base body as a separate component.

It can further be provided that the drive interface is configured to rotate the base body about its axis of rotation when a drive engages.

The drive interface can, for example, be configured to transfer a force applied by a drive to the base body.

It can further be provided that the drive interface is selected from the following list of drive interfaces: gear or toothed belt, belt holder, chain pinion, cam, magnet, recess.

The drive interface can, for example, extend circumferentially around an outer shell of the base body of the flow element. The drive interface can form a toothed belt that interacts with a gear or a toothed belt, ensuring constant, precise positioning of the outlet opening. Similarly, a chain pinion can be used to interact with a chain, a cam can interact with a camshaft, or a magnet can interact with a counter magnet. Furthermore, the drive interface can have recesses into which, for example, a user can insert a lever to manually move the flow element.

It can further be provided that the flow element comprises a position sensor for detecting a position of the outlet opening relative to the axis of rotation.

A position sensor, such as a Hall sensor, enables reliable control of the position of the outlet opening so that a volume flow from the flow element can be set reliably and precisely, in particular automatically.

It can further be provided that the flow element does not comprise a nozzle needle, so that a defined opening and closing of the outlet opening occurs solely by a rotational movement of the base body.

Such a design of the flow element without a nozzle needle enables robust and cost-effective operation of a dispensing system and/or injection molding system incorporating the flow element. The latter can also be designed extremely compactly and space-savingly.

It can further be provided that the flow element is made of a wear-resistant material, in particular a steel.

It can further be provided that the drive interface is formed in a lower quarter of the base body oriented in the direction of the second end.

The arrangement of the drive interface in the lower quarter allows for a particularly controllable movement of the outlet opening.

It can further be provided that the drive interface is formed circumferentially around the base body.

A drive interface formed circumferentially around the base body enables a continuous, in particular continuous, movement of the base body, in which the base body is, for example, repeatedly rotated in a circle.

It can further be provided that the base body has a first region and a second region, wherein a cross section or diameter of the first region is larger than a cross section or diameter of the second region, wherein the drive interface is preferably formed between the first region and the second region.

A particularly smaller lower cross-section of the second region of the base body enables the base body to be immersed in a cavity, so that the flowable mass is guided in the base body for a particularly long time.

Furthermore, a smaller lower cross-section of the base body allows it to be immersed in a receptacle formed on an injection molding system, so that the base body is securely mounted.

Accordingly, it can be provided that the base body comprises a first bearing geometry which is configured to rotatably support the base body of the flow element on or in a first receptacle of the injection molding system.

The bearing geometry is preferably formed in the first region of the base body and can, for example, comprise an undercut that overlies a receptacle of the injection molding system or engages in a recess of the receptacle to rotatably support the base body on or in the injection molding system. For example, the bearing geometry can comprise a plain bearing or a sliding bushing and/or a ball bearing. In particular, the bearing geometry can predetermine and/or limit a movement path of the base body.

Furthermore, the bearing geometry can be provided with at least one seal. A seal, such as an O-ring, can prevent the leakage of fluid through the bearing geometry.

A further development of the invention provides that the base body comprises a second bearing geometry configured to rotatably mount the base body on or in a second receptacle of the injection molding system. The second bearing geometry can be formed in the second region of the base body. The second bearing geometry can also comprise at least one seal.

It can further be provided that a sliding element is arranged at the second end of the base body, wherein the second end of the base body is rotatably mounted in the sliding element.

To ensure the base body can be rotatably mounted, the sliding element can have a coating that reduces friction or increases the wear resistance of the bearing. Additionally or alternatively, the sliding element can form an inclined plane through which the base body is subjected to a defined compressive force, which seals the outlet opening or clamps it to the tool plate when the outlet opening moves into its second position.

It can further be provided that the outlet opening is a bore or is formed by a bore.

An outlet opening designed as a bore is easy to clean and can be provided quickly and easily, for example, as an extension of the channel.

It can further be provided that the outlet opening is a continuation of the channel and that the channel runs through the base body offset from the axis of rotation of the base body.

A channel extending through the base body at an offset from the base body's rotational axis can be a continuation, i.e., a straight line, of the outlet opening, so that the channel is as short as possible. For example, the inlet opening can also be designed offset from the base body's rotational axis, so that a rotation of the base body can initiate the introduction of flowable mass into the channel.

It can further be provided that the flow element comprises a sleeve in which the base body is rotatably secured and the sleeve comprises an interface for arranging the flow element on the injection molding system.

A sleeve in which the base body is rotatably mounted can incorporate a bearing, such as a plain bearing or a ball bearing, and/or form a guide geometry that defines the movement path of the rotating body, allowing the flow element to be used in any injection molding system. Furthermore, a sleeve can be replaced as a wear part, thereby maximizing the service life of the flow element.

It can be provided that in the first position the outlet opening of the base body overlies a cavity inlet opening formed in a tool of a cavity for receiving flowable mass and in the second position the outlet opening of the base body overlies an area impermeable to flowable mass, which is formed, for example, on the tool or on a respective injection molding system or a sleeve encompassed by the flow element.

According to a second aspect, the presented invention relates to a dosing system for an injection molding system.

The presented dosing system comprises a number of possible designs of the presented flow element and a counter interface for engaging the drive interface of a respective flow element.

The counter interface of the presented dosing system can be, for example, a rack, a push rod or any other element for transmitting a driving force.

It can be provided that the dosing system comprises a drive, wherein the drive is configured to move the counter interface in order to rotate at least one flow element of the number of flow elements about its axis of rotation and to move an outlet opening of a base body of the flow element on a predetermined path about the axis of rotation of the base body between a first position and a second position.

Due to the flow element presented, the dispensing system presented can be operated without a needle drive, so that the dispensing system and thus also the injection molding system is particularly robust, compact and cost-efficient.

A drive of the dosing system can, in particular, be an electric, magnetic, hydraulic, and/or pneumatic actuator that moves the counter interface, which can, for example, include a mechanical transmission. Accordingly, the drive of the dosing system provides a force for moving the flow element.

It can be provided that the drive comprises an electrical, magnetic, hydraulic and/or pneumatic actuator for moving the at least one flow element.

It can further be provided that the dosing system comprises a computing unit and at least one position sensor for detecting a position or orientation of the outlet opening relative to the rotational axis of the base body. The computing unit can further be configured to control the drive depending on data detected by the position sensor.

In the context of the invention presented, a computing unit is understood to mean a computer, a processor, a control unit or any other programmable circuit.

The computing unit of the dosing system can precisely determine the current position of a respective flow element based on position data determined by a position sensor and, for example, adjust the drive of the dosing system accordingly so that it interacts in a timely manner with other components of a respective injection molding system, for example with a feed unit and/or an ejector unit.

Accordingly, it can be provided that the dosing system comprises a plurality of flow elements.

In a dosing unit with several or a large number of flow elements, the computing unit can, for example, be configured to move different flow elements differently or independently of one another, so that, for example, different moldings can be formed in parallel, or that individual areas of a mold are filled at different times or with different amounts of flowable mass. This allows cascade injection molding to be realized with the dosing unit according to the invention.

The staggered closing of the flow elements in one or more dosing units can also be achieved mechanically by providing the drive interfaces with gaps, interruptions, or special geometries at defined locations, so that the flow elements are only moved in sections and/or at staggered intervals. This also allows gates to be opened and closed at staggered intervals.

It can further be provided that the counter interface is configured to rotate all the basic bodies of the plurality of flow elements together.

Through a joint rotation or movement of the respective flow elements, they are brought into a first position and a second position in a time-coordinated manner, so that several molded parts can be formed in parallel. The coordination of the various flow elements takes place particularly through the counter interface, so that a movement of the counter interface or a drive coupled to the counter interface directly leads to a movement of the flow elements. This results in an absolutely uniform or synchronous opening and closing of the injection points.

It can further be provided that the drive is configured to rotate respective base bodies of the plurality of flow elements independently of one another.

For the independent rotation of several flow elements, the counter interface can, for example, comprise several drive interfaces, such as gears, or be connected to the flow elements via a differently configurable coupling, such as a plurality of electromagnets.

According to a third aspect, the presented invention relates to an injection molding method for producing a molded article, wherein the injection molding method comprises introducing flowable mass into a number of flow elements of a possible embodiment of the presented dosing system and rotating base bodies of the number of flow elements between the second position and the first position by the drive.

The dosing system presented is used in particular to carry out the injection molding process presented.

According to a fourth aspect, the presented invention relates to an injection molding system for producing a molded article.

The presented injection molding system comprises a possible embodiment of the presented dosing system, a feed unit for feeding flowable mass to the dosing unit, and a tool comprising a mold insert forming a number of cavities, wherein an outlet opening of a base body of a respective flow element of the dosing system is closed in the second position by a material projection of the injection molding system.

The material advantage of the injection molding system can be formed, for example, by a structure of the injection molding system, by the tool, by the dispensing system or by the mold insert itself.

It can be provided that in the tool each cavity of the number of cavities has a base body receptacle for receiving the base body of a respective flow element, wherein the base body receptacle has a first region in which a cavity inlet opening is formed, which fluidically connects an outlet opening of a respective base body to a respective cavity, and wherein the base body receptacle has a second region which closes the outlet opening.

It can be provided that the first receptacle is assigned to the feed unit, wherein the feed unit is a distributor, a nozzle body, a nozzle insert, or the like.

It can further be provided that the second receptacle is assigned to the tool, the sliding bush and/or the mold insert.

A second region formed in a respective tool, which closes a respective outlet opening, allows a respective flow element to remain in its relative orientation to the tool and to be rotated only between the first position and the second position. Accordingly, a complex vertical movement of a flow element in the form of a needle can be dispensed with.

Furthermore, a second area formed in a respective tool requires a particularly compact design of the injection molding system, since intermediate layers between a respective flow element and a respective tool can be dispensed with.

It can further be provided that the cavity inlet opening is offset from an axis of symmetry of the base body receptacle.

A cavity inlet opening formed offset to a symmetry axis of the base body holder enables the cavity inlet opening to be covered by the outlet opening of a flow element in the first position.

It can further be provided that the cavity inlet opening is offset from an axis of symmetry of the cavity.

A cavity inlet opening formed offset to a symmetry axis of the cavity enables the cavity inlet opening to be covered by the outlet opening of a flow element in the first position in the event that the symmetry axis of the cavity is aligned with the rotation axis of the flow element.

• 1 eine mögliche Ausgestaltung eines vorgestellten Strömungselements im teilweise eingesetzten Zustand,
• 2 eine Schnittdarstellung des vorgestellten Strömungselements,
• 3 eine mögliche Ausgestaltung des vorgestellten Dosiersystems,
• 4 eine Detailansicht des Dosiersystems gemäß 3,
• 5 eine mögliche Ausgestaltung des vorgestellten Spritzgusssystems,
• 6 eine weitere Darstellung des Spritzgusssystems gemäß 5,
• 7 eine andere mögliche Ausgestaltung des vorgestellten Spritzgusssystems,
• 8 eine mögliche Darstellung des vorgestellten Spritzgussverfahrens.

Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. They show:

• 1 a possible design of a proposed flow element in a partially inserted state,
• 2 a sectional view of the presented flow element,
• 3 a possible design of the presented dosing system,
• 4 a detailed view of the dosing system according to 3 ,
• 5 a possible design of the presented injection molding system,
• 6 a further illustration of the injection molding system according to 5 ,
• 7 another possible design of the presented injection molding system,
• 8 a possible representation of the presented injection molding process.

In the 1 and 2 is a flow element 100 for an injection molding system 300 according to the 5 to 8 shown.

The flow element 100 comprises a base body 101, a drive interface 103 for engagement of a drive 105 and a channel 107 formed in the base body 101 for conducting a flowable mass.

How 2 shows in more detail, the base body 101 comprises at a first end 109 an inlet opening 111 for introducing flowable mass into the channel 107 and at a second end 113 opposite the first end 109 an outlet opening 115 for discharging flowable mass from the flow element 100 into a cavity.

In 2 It is clearly visible that the outlet opening 115 is formed offset from a rotation axis 117 in an end surface 114 of the base body 101.

The base body 101 is rotatable about its rotation axis 117 by the drive interface 103, whereby the outlet opening 115 can be moved between a first position, as shown in 5 shown and a second position, as in 6 shown can be moved.

In 3ist a dosing system 200 for an injection molding system 300 according to 5 shown.

The dosing system 200 comprises a plurality of flow elements 100 according to 1 and a counter interface 201, through which the flow elements 100 are rotatable about their respective rotational axis 117, so that an outlet opening 115 of a base body 101 of a respective flow element 100 is moved on a predetermined path about the rotational axis 117 of the base body 101 between a first position and a second position.

In the present case, the counter interface 201 in the form of a rack 201, which engages in the drive interfaces 103 of the flow elements 100, is mechanically coupled to the flow elements, so that a movement of the counter interface 201 is transmitted to the flow elements 101 by a motor (not shown) in order to rotate them.

In 4 The counter interface 201 and the drive interfaces 103 are shown in a detailed view. Here, it can be seen that the counter interface 201 engages with the drive interfaces 103 in such a way that they move in a time-coordinated manner, in particular synchronously.

In 5 An injection molding system 300 for producing a molded article is shown schematically. The injection molding system 300 comprises a dosing system 200 according to 3 a feed unit 301 and a tool 303 comprising a mold insert 305 forming a cavity 307.

In 5 the injection molding system 300 is shown in a configuration in which the outlet opening 115 of the base body 101 of a flow element 100 of the dosing system 200 is arranged in the first position in a fluid-conducting manner above the cavity 307, so that mass introduced into the channel 107 by the feed unit 301 flows through the flow element 100 into the cavity 307, fills it and forms a molding.

Furthermore, the base body 101 is rotatably mounted in a first receptacle 320 of the injection molding system 300 via a first bearing geometry 120.

Furthermore, the base body 101 is mounted in a second receptacle 330 of a mold insert 360.

In 6 the injection molding system 300 is shown in a configuration in which the outlet opening 115 of the base body 101 of the flow element 100 is closed in the second position by a material projection 309 so that no mass escapes from the flow element 100.

The material projection 309 is formed by a base body receptacle 311 for receiving the base body 101 of the flow element 100.

The base body receptacle 311 has a first region 313 in which a cavity inlet opening 315 is formed, which fluidically connects the outlet opening 115 of the base body 101 to the cavity 307.

Furthermore, the base body receptacle 311 has a second region 317 which closes the outlet opening 115 by the material projection 309.

The material projection 309 or the base body receptacle 311 is shown here as an example as part of the tool 303. Alternatively, the material projection can be formed, for example, by a structural design of the injection molding system 300, by the dosing system 200, or by the flow element 100 itself.

Furthermore, the base body 101 is rotatably mounted in the first receptacle 320 of the injection molding system 300 via the first bearing geometry 120.

Furthermore, the base body 101 is connected via a second bearing geometry 130 to a sleeve 350 in the form of a sliding bush and is rotatably mounted by this in the second receptacle 330 of the mold insert 360.

A securing element 370 secures the flow element 100 in its position in the cavity by exerting a compressive force on the base body 101 via an inclined plane 380, which counteracts a force pressing the base body 101 out of the cavity.

One can see in the 1 to 6 that the end section of the channel 107 provided in the base body 101, which is formed as a bore 116 and forms the outlet opening 115 at the end, essentially follows the main direction of the channel 107 along the rotation axis 117 of the flow element 100. The bore 116 can be formed exactly parallel to the rotation axis 117. However, it can also - as in the 2 , 5 and 6 to be seen - run at an angle (not specified) obliquely to the rotation axis 117. It is important here that the bore 116 and thus the outlet opening 115 is arranged laterally offset from the rotation axis 117 of the base body 101, so that the outlet opening 115 moves on a circular path when the base body 101 rotates about the rotation axis 117.

In the embodiment of the 7 The end section of the channel 107 (the bore 116) extends perpendicular to the rotation axis 117, so that the bore 116 extends radially within the base body 101 and the outlet opening 115 opens into the (undesignated) peripheral wall of the second region B of the flow element 100. Here, too, the bore 116 can run exactly perpendicular to the rotation axis 117 or slightly obliquely at an angle (undesignated).

In 8 an injection molding process 400 for producing a molded article is shown.

The injection molding process 400 comprises an introductory step 401, in which flowable mass is introduced into a number of flow elements 100 of a possible embodiment of the presented dosing system 200, and a rotation step 403, in which the base body 101 of the number of flow elements 100 is moved between the second position and the first position by the drive.

The invention is not limited to one of the embodiments described above, but can be modified in many ways.

It can be seen that the presented invention relates to a flow element 100 for an injection molding system 300, wherein the flow element 100 comprises a base body 101, a drive interface 103 for engagement of a drive 105 and a channel 107 formed in the base body 101 for conducting flowable mass, wherein the base body 101 has an inlet opening 111 at a first end 109 for introducing flowable mass into the channel 107, wherein the base body 101 comprises an outlet opening 115 at a second end 113 for discharging flowable mass from the flow element 100 into a cavity 307, wherein the outlet opening 115 is offset from a rotation axis 117 of the base body 101, and wherein the base body 101 is rotatable about its rotation axis 117 by the drive interface 103.

All features and advantages arising from the claims, the description and the drawings, including design details, spatial arrangements and method steps, can be essential to the invention both individually and in a wide variety of combinations.

List of reference symbols

A

first area

B

second area

a

Distance

100

flow element

101

Basic body

103

Drive interface

105

drive

107

channel

109

first end

111

Inlet opening

113

second end

114

End face

115

Outlet opening

116

drilling

117

axis of rotation

120

first bearing geometry

122

seal

130

second bearing geometry

132

seal

200

Dosing system

201

Counter interface

300

Injection molding system

301

Feed unit

303

Tool

305

mold insert

307

cavity

309

Material advantage

311

Basic body recording

313

first area

315

Cavity inlet opening

317

second area

320

first recording

330

second recording

350

Sleeve / sliding bushing

360

mold insert

400

Injection molding process

401

Introductory step

403

Turning step

Claims (16)

A flow element (100) for an injection molding system (300), wherein the flow element (100) comprises: ▪ a base body (101), ▪ a drive interface (103), and ▪ a channel (107) formed in the base body (101) for conducting flowable mass, wherein the base body (101) has an inlet opening (111) at a first end (109) for introducing flowable mass into the channel (107), wherein the base body (101) has an outlet opening (115) at a second end (113) for discharging flowable mass from the flow element (100) into a cavity (307), wherein the outlet opening (115) is formed offset by a distance (a) from a rotation axis (117) of the base body (101), and wherein the base body (101) is rotatable about its rotation axis (117) via the drive interface (103). Flow element (100) according to Claim 1 , characterized in that ▪ that the outlet opening (115) is formed at the end of a bore (116) which continues the channel (107) in the base body (101), and/or ▪ that the bore (116) is arranged at an angle oblique to the rotation axis (117) of the base body (101), and/or ▪ that the outlet opening (115) is aligned in a plane with an end face (114) of the base body (101), and/or ▪ the end face (114) of the base body (101) is arranged perpendicular to the rotation axis (117) of the base body (101), and/or ▪ the outlet opening (115) and the channel (107) are arranged at least partially offset from the rotation axis (117) of the base body (101), and/or ▪ the drive interface (103) is configured to to rotate the base body (101) about its rotation axis (117) upon engagement of a counter interface (201), and/or ▪ wherein the drive interface (103) and the counter interface (201) are part of a drive (105). Flow element (100) according to one of the preceding claims, characterized in that the base body (101) has a first region (A) and a second region (B), wherein a cross section or diameter of the first region (A) is larger than a cross section or diameter of the second region (B) and wherein the drive interface (103) is formed between the first region (A) and the second region (B) Flow element (100) according to one of the preceding claims, characterized in that the base body (101) comprises a first bearing geometry (120) which is configured to rotatably support the base body (101) on or in a first receptacle (320) of the injection molding system (300). Flow element (100) according to Claim 4 , characterized in that the first bearing geometry (120) comprises at least one seal (122). Flow element (100) according to one of the preceding claims, characterized in that the base body (101) comprises a second bearing geometry (130) which is configured to rotatably support the base body (101) in a second receptacle (330) of the injection molding system (300). Flow element (100) according to Claim 6 , characterized in that the second bearing geometry (130) comprises at least one seal (132). Flow element (100) according to one of the preceding claims, characterized in that the flow element (100) comprises a position sensor for detecting a position or position of the base body (101) and/or the outlet opening (115) relative to the rotation axis (117). Dosing system (200) for an injection molding system (300), characterized in that the dosing system (200) comprises: ▪ a number of flow elements (100) according to one of the Claims 1 until 8 , ▪ a counter interface (201) for engaging in the drive interface (103) of a respective flow element (100). Dosing system according to Claim 9 , characterized in that the drive interface (103) of a respective flow element (100) and the counter interface (201) form a drive (105) for the flow elements (100). Dosing system according to Claim 10 , characterized in that an actuator is provided to move the counter interface (201) and to rotate at least one flow element (100) of the number of flow elements (100) about its axis of rotation (117), and to move an outlet opening (115) of a base body (101) of the flow element (100) on a predetermined path about the axis of rotation (117) of the base body (101) between a first position and a second position. Dosing system (200) according to one of the Claims 9 until 11 , characterized in that the dosing system (200) comprises a computing unit and at least one position sensor for detecting a position or a position of the outlet opening (115) relative to the rotation axis (117) of the base body (101), wherein the computing unit is configured to control the drive (105) depending on data detected by the position sensor. Dosing system (200) according to one of the Claims 9 until 12 , characterized in that ▪ that the counter interface (201) is configured to rotate all the base bodies (101) of the plurality of flow elements (100) together and/or simultaneously, and/or ▪ that the counter interface (201) is configured to rotate respective base bodies (101) of the plurality of flow elements (100) independently of one another. Injection molding method (400) for producing a molded article, wherein the injection molding method (400) comprises: ▪ Introducing (401) flowable mass into a number of flow elements (100) of a dosing system (200) according to one of the Claims 9 until 13 , ▪ Rotating (403) base bodies (101) of the number of flow elements (100) between a second position and a first position. Injection molding system (300) for producing a molded article, the injection molding system (300) comprising: ▪ a dosing system (200) according to one of the Claims 9 until 13 , ▪ a feed unit (301), ▪ a tool (303) comprising a mold insert (305) forming a number of cavities (307), wherein an outlet opening (115) of a base body (101) of a respective flow element (100) of the dosing system (200) is closed in the second position by a material projection (309) of the injection molding system (300). Injection molding system (300) according to Claim 15 , characterized in that ▪ in the tool (303) each cavity (307) of the number of cavities (307) has a second receptacle (330) for receiving the base body (101) of a respective flow element (100), ▪ wherein the second receptacle (330) has a first region (313) in which a cavity inlet opening (315) is formed, which connects an outlet opening (115) of a respective base body (101) to a respective cavity (307) in a fluid-conducting manner, and ▪ wherein the receptacle (340) has a second region (317) which closes the outlet opening (115).