Transfer device and injection molding device

Abstract

In a preferred variant of the present disclosure, a transfer device is configured for transferring fluid between a base and a central mold portion in an injection molding device, the central mold portion being rotatably arranged relative to the base about an axis of rotation. Typically, the column is arranged in a sleeve, the column and sleeve being arranged to be rotatable relative to each other about an axis of rotation. For a good result, the sleeve comprises at least two annular sections arranged along the column in the direction of the axis of rotation.

Description

Technical Field

[0001] The present disclosure relates to a transfer device for transferring fluid between a base and a central mold part in an injection molding device, and an injection molding device including such a transfer device. Background Art

[0002] Devices for injection molding of plastic products are known from the prior art, which include a first outer mold half and a second outer mold half arranged to be displaceable relative to each other. A central mold part is arranged between the first outer mold half and the second outer mold half, and the central mold part is rotatable about a rotational axis typically extending in the vertical direction. The central part typically includes at least two but more often four sides, which are arranged in pairs opposite each other and each carry an inner mold half.

[0003] During operation, various process fluids must be supplied to the central mold part and the inner mold halves attached thereto.

[0004] EP0922556A1, published in 1999 in the name of Foboha GmbH, relates to a holding device for an injection mold half, or its support member includes two displacement units. A rotating unit is placed on each of the units. A holding member is located on each rotating unit. A mold holder constructed as a prismatic rotating block can be inserted into the gap between the two holding members. The mold holder in the holding device is displaceable in one direction and rotatable about a displaceable axis vertical to the direction. Media are fed to the rotating block through channels or pipes in a first shaft and a second shaft of the axis.

[0005] WO2008043641A1, published in 2008 in the name of Krauss Maffei Tech GmbH, relates to a rotating device for a horizontal injection molding machine, the rotating device including a base plate and a drive member for rotating a rotating table, and a rotating table rotatable about a vertical axis is arranged on the base plate. A rotary distributor or rotary joint is described, which is used to transfer media to the turntable or mold halves.

[0006] WO2013001022A1, published in 2014 in the name of Foboha GmbH, relates to a rotating device for a central part in a rotary injection molding device. The rotating device includes a column non-rotatably mounted inside the central part and a sleeve surrounding the column, and the sleeve is mounted to rotate with the central part, and the sleeve and the column are operably interconnected via a driver.

[0007] WO2017210793A1, published in December 2017 in the name of Athena Automation Ltd., relates to an injection molding machine which includes a fixed platen and a moving platen mounted on a machine base, and a rotating device for rotatably supporting a central mold section. The rotating device includes: a rotating table mounted on top of a carriage body, capable of rotating about a vertical table axis relative to the carriage body for rotatably supporting a central mold assembly; and a rotary joint received in the carriage body, below the rotating table and above an actuator connection portion, the rotary joint being fixed to rotate with the table about the table axis.

[0008] WO2020025361A1, published in 1999 in the name of Foboha GmbH, relates to an injection molding device which includes a central portion and a rotating device for rotating the central portion in the injection molding device. The rotating device includes a base supported relative to the injection molding machine. A column attached thereto extends axially above the base. A sleeve coaxially surrounds the column and is at least partially disposed in the central portion. The sleeve rotates with the central portion about the column. The column is removably disposed relative to the central portion. Summary of the Invention

[0009] To supply various process fluids, such as cooling water, hydraulic oil, pneumatic air, or a selection thereof, to a central mold section, dedicated devices are required. Known devices are typically unique parts for a specific injection molding device and a specific application, resulting in high manufacturing costs and generally a low degree of standardization. Additionally, these parts require frequent maintenance. This can only be achieved through the time-consuming disassembly of these complex devices, which is a drawback since downtime has a negative impact on the operating costs of the device.

[0010] In a preferred variant of the present disclosure, the transfer device is configured to transfer fluid between a base and a central die part in an injection molding device, the central die part being rotatably arranged relative to the base about a rotational axis. Typically, a column is arranged in a sleeve, and the column and the sleeve are arranged to be rotatable relative to each other about the rotational axis. For good results, the sleeve includes at least two annular segments arranged along the column in the direction of the rotational axis. In the installed position, the at least two annular segments can be arranged adjacent to each other, and each annular segment is configured to exchange fluid with the column arranged therein, as described herein. Preferably, the at least two annular segments each enclose a segment of the column. The at least two annular segments of the sleeve are typically arranged coaxially with the column. This allows for improved disassembly of the sleeve by removing the necessary segments in a sequential manner. Since the segments of the sleeve can be mounted on the column one by one, the assembly is also improved. Additionally, compared to an integral sleeve of combined length, a sleeve having at least two annular segments reduces the length (depth) along the central axis of the individual annular segments. The machining of the (shorter) individual segments is simplified and / or feasible with less complex and expensive tools.

[0011] Depending on the application, the sleeve includes three or four or five or six or more segments for fluid exchange. If appropriate, the segments of the sleeve can be interconnected in a detachable manner. Depending on the field of application, at least two segments can be interconnected in a non-detachable manner, for example, by welding or shrink fitting or a combination thereof.

[0012] If appropriate, at least two of the segments have the same design, thus facilitating standardization. A sleeve including two or more annular segments can be assembled from standardized (and prefabricated) segments. In the case of partial wear of the sleeve, only the affected segment needs to be replaced (using available replacement segments). This is advantageous compared to the prior art where the entire sleeve has to be replaced.

[0013] Preferably, at least one annular segment is configured to transfer at least one fluid between the column and the annular segment. As mentioned herein, the at least one fluid can be a liquid (such as cooling water or hydraulic oil) or a gas (such as pneumatic air) or a selection thereof.

[0014] Typically, the annular segment includes a sidewall extending between a first end face and a second end face for connection to adjacent segments respectively. The sidewall encloses an opening on its inner side configured to receive the column. The sidewall can have various shapes, such as cylindrical or rectangular or polygonal, in particular, it can have a rectangular shape with rounded edges. The outer sidewall is preferably shaped such that the annular segment can be easily clamped during production.

[0015] In some variants, one or more sections have a compact design. Here, the height (along the central axis of the section) of at least one of the annular sections is less than its width (perpendicular to the central axis of the section). Depending on the design of the column, the height of an individual section is preferably less than half of the height of the column (along the axis of rotation), more preferably less than one third or one quarter of the height of the column.

[0016] If appropriate, at least one of the annular sections is manufactured by an additive process. However, it is also possible to machine it from solid material, in particular a metal such as steel or aluminium.

[0017] In some variants, at least one groove is arranged between the sleeve and the column for transporting at least one fluid therebetween. In a preferred variant, at least one annular section includes at least one first groove facing the column in the installed position for transporting at least one fluid therebetween. Alternatively or additionally, the column includes at least one (corresponding) groove which faces the section of the sleeve in the installed position for transporting at least one fluid therebetween. The first groove of the section typically forms a fluid interface with the column in the installed position. In a preferred variant, at least one first groove has a height (extending parallel to the central axis of the annular section) greater than its width (extending perpendicular to the central axis of the annular section, i.e., the radial thickness).

[0018] Depending on the design, at least one first groove is a circumferential groove. Alternatively, at least one first groove can be a cross-section circumferential groove which only partially surrounds the column in the assembled state. This allows for an angle-dependent transfer of fluid between the column and the sleeve, where transfer therebetween is only possible for some rotational orientations (angles) of the sleeve relative to the column.

[0019] In a preferred variant, at least one annular section includes two or more first grooves for transporting fluid between the section and the column. A pair of first grooves can implement the inlet and outlet of the fluid circuit of the central die part. The pair of first grooves is preferably arranged in a common section of the sleeve, although separate arrangements are also possible.

[0020] In order to convey at least one fluid between the sleeve and the central die part, the column preferably includes at least one channel extending in the longitudinal direction of the column for transporting the fluid. Typically, the column includes one channel for each first groove on the sleeve.

[0021] If appropriate, at least one section includes a passage for fluidly interconnecting the first groove across the section to a fluid circuit. In some variants, the passage extends at least partially parallel to the central axis of at least one section, fluidly interconnecting the first groove to the exterior of the section. Alternatively or additionally, the passage extends at least partially perpendicular to the central axis of at least one section, fluidly interconnecting the first groove to the passage of an adjacent section. Preferably, the passage is formed in a section as a channel on the inner side of the sidewall. In particular, the passage may extend from a connector arranged at the outer surface of the sidewall of the section to the first groove on the inner side of the sidewall. Alternatively or additionally, at least one passage may discharge into the first and / or second end faces of the section. Preferably, the section includes a seal arranged at the discharge opening of the passage at the respective end face for fluidly interconnecting the passage to the passage of an adjacent section or the central mold part in a sealed manner.

[0022] For good performance, at least one annular section includes at least one second groove configured to receive a sealing ring. The sealing ring arranged in at least one second groove forms a sealed connection between the column and the section during operation, such that leakage from the first groove is minimized or even prevented. Typically, at least one second groove is arranged between two adjacent first grooves, and in some variants, two second grooves are arranged between adjacent first grooves. Preferably, the number of second grooves in at least one section is one more than the number of first grooves in the same section. The sealing ring may be formed as an O-ring made of an elastic material such as rubber.

[0023] In a preferred variant, at least two adjacent annular sections are interconnected relative to each other in a form-fitting manner. Preferably, at least two annular sections each include a first interface and a matching second interface for connecting at least two annular sections to each other in a standardized manner. Depending on the design, the first interface of the annular section may form a form-fitting connection with the corresponding second interface of the adjacent annular section. In some variants, the first interface and / or the second interface is substantially rotationally symmetric with respect to the central axis of the respective annular section. In other variants, the first interface and / or the second interface includes an anti-rotation member for orienting two adjacent annular sections relative to each other. The anti-rotation member may be formed as a pin or the like, and preferably, the anti-rotation member is formed as a rotationally asymmetric shape of the first interface and the second interface. If appropriate, the first interface of the annular section overlaps with the corresponding second interface of the adjacent annular section in the direction of the rotation axis in the assembled state. The overlap is preferably less than one-tenth of the height of two adjacent sections.

[0024] Depending on the field of application, the section may include a first alignment surface that, in the assembled state, engages with a second alignment surface of an adjacent section to concentrically align two adjacent sections. The first alignment surface is preferably arranged at a protrusion of the first end face and / or the second end face and / or at least partially extends into a corresponding recess arranged at the first end face and / or the second end face in the assembled state, wherein the second alignment surface is arranged in the recess. The protrusion may form part of a first interface in this case, and the corresponding recess may form part of a second interface. This allows at least two annular sections to be connected in any order in a standardized manner. If appropriate, the protrusion is an annular protrusion arranged concentrically with the opening of the section, preferably, the annular protrusion is formed as a bead edge. Correspondingly, the recess is an annular recess arranged concentrically with the opening of the section, in particular, the annular recess may be formed as a step at the opening of the section. To prevent the inclined contact of two adjacent sections, the first end face and the second end face each include a substantially flat contact surface, in particular, an annular contact surface. Preferably, at least two adjacent sections press against each other with their corresponding contact surfaces in the assembled state. If appropriate, a second groove is arranged beside the first interface, and another second groove is arranged beside the second interface. In other forms, the second groove is at least partially integrated into the first interface and / or the second interface.

[0025] Good results can be achieved when two adjacent sections are releasably or fixedly interconnected in the assembled state. The fixed interconnection can be achieved by welding and / or shrink-fitting the two sections together before or in the assembled position. In a preferred variant, the sections are releasably interconnected using screws or other attachment members. This allows the sections to be clamped relative to each other to increase the rigidity of the sleeve and minimize the possibility of leakage. If appropriate, at least one screw can be accessed from the outside in the assembled state. The screw head is preferably arranged in a notch, in particular, a transverse notch. This may allow separating parts of the sleeve in the assembled state, where the separated parts typically include one or more annular sections.

[0026] Depending on the construction, the annular sections have substantially the same or congruent profiles in a cross-sectional view. This promotes the interchangeability of the sections, thereby further improving standardization. In particular, the sleeve has at least part that is substantially parallel to the outer surface of the column.

[0027] To ensure good rotatability of the sleeve and the column relative to each other, at least one annular section includes a bearing on the inner side to center the column relative to the annular section. Preferably, at least one section including the bearing is formed as a terminal section configured to receive the end section of the column. If appropriate, the terminal section includes a side wall surrounding an opening and a bottom that forms a recess with the side wall to accommodate the end section of the column therein. In some variants, the bottom of the terminal section includes a protrusion that extends into a corresponding recess of the column in the installed position. For good performance, at least one annular section includes a rotation and / or position sensor for measuring the orientation (angle) of the column relative to the sleeve. Preferably, the protrusion is arranged concentrically with the column and houses the rotation and / or position sensor.

[0028] Good results can be obtained when the column has a variable diameter along its axial direction. Depending on the design, the variable diameter can vary linearly, for example. Alternatively or additionally, the column can have a staggered design where the diameter decreases stepwise along its general extension. This allows for simplified assembly of the transmission device. Preferably, the column with a staggered design includes at least two sections arranged coaxially with respect to the axial direction of the column and adjacent to each other.

[0029] In some variants, the column has a multi-part design where at least two sections are arranged coaxially with respect to the axial direction of the column and adjacent to each other. A sealing ring and / or a fluid connector is arranged between the at least two sections for sealingly connecting the corresponding channels of the two sections. In this way, similar advantages regarding standardization and maintainability can be achieved.

[0030] Depending on the field of application, the column is fixedly arranged relative to the base, and the sleeve is arranged in the central part of the mold. The column is typically removably arranged relative to the central part. In a preferred variant, the column can be interconnected to the base, particularly in a detachable manner.

[0031] Alternatively, the sleeve is fixedly arranged relative to the base, and the column is fixedly arranged outside the central mold part relative to the central mold part.

[0032] In another preferred variant of the present disclosure, the injection molding device includes a transmission device as described herein. The transmission device fluidly interconnects the base and the central mold part, which is rotatably arranged relative to the base about a rotation axis.

[0033] Depending on the design, the transmission device is attached to the base. In some variants, the transmission device is at least partially incorporated into the central mold part. In a preferred variant, the transmission device is attached to the lower face of the base protruding away from the base, while the central mold part is mounted on the upper face of the base opposite the lower face during operation.

[0034] The injection molding device preferably includes at least one outer mold half. The central mold part and at least one outer mold half are typically arranged to be displaceable relative to each other between an open position and a closed position. In a preferred variant, the molding device preferably includes a first outer mold half and a second outer mold half arranged opposite to the central mold part. Each outer mold half forms a cavity with a corresponding inner mold half arranged at the central mold part in the closed position, and the cavity is adapted to receive molten plastic material injected into the cavity through a runner channel to form an object at least partially composed of the molten plastic material. After the molten plastic material is sufficiently cured, the injection molding device is opened, and the central part is rotated by an appropriate angle around a rotation axis, typically at least about 90 degrees, so that two other inner mold halves can be interconnected to the first outer mold half and the second outer mold half to form a cavity therebetween.

[0035] If appropriate, the post projects at least partially through the opening of the base. In some variants, the post extends through the opening of the central part. Here, it is possible to arrange at least one section of the sleeve around the first end of the post and at least one section of the sleeve around the opposite second end of the post, while the central mold part is arranged to be interposed between at least two sections of the sleeve.

[0036] The gear for driving the central mold part preferably surrounds the post. In some variants, the gear is attached to a coupling plate that is detachably connected to the central mold part. The coupling plate is typically arranged concentrically with the opening of the base and is capable of rotating relative to the base around the rotation axis. Depending on the field of application, the post or the sleeve is attached to the coupling plate for rotating therewith during operation. Preferably, the coupling plate is rotatably mounted on the base plate of the base by means of a bearing arranged therebetween.

[0037] When the base includes a base plate at least partially manufactured by an additive manufacturing process, a lightweight construction is possible. The base plate is preferably at least partially made of metal, however other materials such as composite materials are also possible.

[0038] For good performance, the post is supported during operation by a coupling plate for the central mold part, and the coupling plate is rotatably arranged on the base around the rotation axis.

[0039] It will be understood that the foregoing general description and the following detailed description both present embodiments and are intended to provide an overview or framework for understanding the nature and characteristics of the present disclosure. Drawings are included to provide further understanding, and the drawings are incorporated into this specification and form a part thereof. The drawings illustrate various embodiments and are used in conjunction with the description to explain the principles and operations of the disclosed concepts. Description of the Drawings

[0040] The disclosure described herein will be more fully understood from the detailed description given hereinafter and the accompanying drawings, which should not be regarded as limiting the disclosure described in the appended claims. In the drawings, it is shown as follows:

[0041] Figure 1 is a first variant of an injection molding device according to the present disclosure;

[0042] Figure 2 is a partial cross-sectional view of a first variant of a transfer device according to the present disclosure;

[0043] Figure 3 is Figure 2 an exploded and partial cross-sectional view of the transfer device of;

[0044] Figure 4 is in Figure 2 the detailed view of the transfer device of indicated by the frame with the mark A in; Figure 2 and

[0045] Figure 5 is in Figure 4 the detailed view of the transfer device of indicated by the circle with the mark R in; Figure 4 Detailed Description

[0046] Reference will now be made in detail to certain embodiments, examples of which are illustrated in the accompanying drawings, in which some but not all features are shown. In fact, the embodiments disclosed herein may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Wherever possible, like reference numerals will be used to refer to like components or parts.

[0047] Figure 1 shows a first variant of an injection molding device 5 according to the present disclosure. In Figure 2 is shown a partial cross-sectional view of a first variant of a transfer device 1 according to the present disclosure, and Figure 3 shows Figure 2 an exploded and partial cross-sectional view of the transfer device 1 of. Figure 4 shows in Figure 2 the detailed view of the transfer device 1 of indicated by the frame with the mark A in, and in Figure 2 can be seen in Figure 5 the detailed view of the transfer device 1 of indicated by the circle with the mark R in Figure 4 Figure 4

[0048] As Figure 1 ​​​As shown, a first variant of the injection molding device 5 includes a transfer device 1 that fluidically interconnects a base 2 and a central mold part 3, which is rotatably arranged relative to the base 2 about a rotation axis 4. A first outer mold half 32 and a second outer mold half 33 are arranged on opposite sides of the central mold part 3 along a first direction y. In the variant shown, the first mold half 32 is fixed during operation, while the central mold part 3 and the second outer mold half 33 are arranged to be displaceable along the first direction y between an open position and a closed position. In the closed position, an inner mold half (not shown) arranged at the central mold part 3 and the first outer mold half 32 and the second outer mold half 33 form a cavity that is adapted to receive molten plastic material injected through a runner channel into the cavity to form an object that is at least partially composed of the molten plastic material. After the molten plastic material has sufficiently solidified, the injection molding device 5 is opened and the central part 3 is rotated by a suitable angle about the rotation axis 4, typically at least 90 degrees, such that two other inner mold halves can be interconnected to the first outer mold half 32 and the second outer mold half 33 to form a cavity between them. A drive 29 is attached to the base 2 and drives the rotation of the central mold part 3. The transfer device 1 is attached to the lower face of the base 2. The base 2 supports the central mold part 3 during operation and is displaceable in the first direction y. For this purpose, when moving between the open position and the closed position, a linear guide 30 attached to the base 2 allows linear displacement on a guide rail 31.

[0049] As Figure 2 As visible, the transfer device 1 includes a post 6 arranged in a sleeve 7. In the variant shown, the sleeve 7 is attached to a bottom plate 18 of the base 2. The post 6 is interconnected to the central mold part 3 via a coupling plate 19, so that the post 6 rotates together with the central mold part 3 during operation. The coupling plate 19 is arranged concentrically with an opening 16 of the base 2 and is rotatable relative to the base 2 about the rotation axis 4. The possible rotation directions are indicated by dashed arrows. A gear 17 is attached to the coupling plate 19, which mechanically interconnects the coupling plate 19 to the drive 29 for rotating the coupling plate 19. In the variant shown, the post 6 extends through the opening 16 of the base 2 and can be fluidically interconnected to the central mold part 3 via the coupling plate 19. To improve maintainability, the sleeve 7 includes at least two annular segments 8 arranged along the post 6 in the direction of the rotation axis z. The sleeve 7 of the first variant of the transfer device 1 shown has a total of six annular segments 8 stacked in the direction of the rotation axis z. At least one of the annular segments 8 is configured to transfer at least one fluid between the post 6 and the annular segment 8. Typically, this fluid is cooling water or hydraulic oil, or a gas such as pneumatic air or a selection thereof.

[0050] Sector 8 typically includes side walls extending between a first end face and a second end face for connection to corresponding adjacent sectors 8. The side walls enclose openings on their inner sides configured to receive the columns 6. Here, the side walls have a rectangular outer shape with rounded edges. This is best seen in Figure 3 . The terminal sector 8 is configured to receive an end section of the column 6 and includes a bearing 9 on the inner side to center the column 6 relative to the annular sector 8. The terminal sector 8 includes side walls and a bottom, which together with the side walls form a recess to accommodate the end section of the column therein. Here, the bottom of the terminal sector 8 includes a protrusion that extends into a corresponding recess of the column 6 in the installed position. The protrusion is arranged concentrically with the column 6 and houses a rotation and / or position sensor 27.

[0051] As Figure 4 best seen, at least one sector 8 includes a first groove 10 facing the column 6 in the installed position for transmitting at least one fluid therebetween. In the illustrated variant, each sector 8, except for the terminal sector 8, includes two or four first grooves 10. Between adjacent first grooves 10, at least one second groove 12 is arranged, which is configured to receive a sealing ring 13. In this way, leakage between two adjacent first grooves 10 can be ensured to be minimized. The sealing ring 13 is formed as an O-ring made of an elastic material. At least one passage 11 of each sector 8 is configured to fluidly interconnect the first grooves 10 across the sector 8 to a fluid circuit. The illustrated passages 11 each extend from a connector 28 arranged at the outer surface of the side wall of the sector 8 to the first groove 10 on the inner side of the side wall.

[0052] Column 6 includes at least one channel 14 extending in the longitudinal direction z of the column 6 for transmitting fluid, in particular between the corresponding first grooves 10 and the central mold part 3. In the illustrated variant, column 6 includes one channel 14 for each first groove 10. Each channel 14 includes an opening facing the corresponding first groove 10 in the assembled state.

[0053] At least two adjacent annular sectors 8 are interconnected in a form-fitting manner relative to each other. Figure 5 A detailed view of the boundary region between two adjacent sectors 8 is shown. The lower sector 8 includes a protrusion 23 that at least partially extends into a corresponding recess 25 of the upper sector 8 in the assembled state. Here, a first alignment surface 24 arranged at the protrusion 23 engages a second alignment surface 26 arranged at the recess 25 in the assembled state for concentrically aligning the upper and lower sectors 8 relative to each other. The sectors 8 press against each other at the contact surface 34. As Figure 3As can be seen, the protrusion 23 and the first alignment surface disposed thereon form a first interface 35, and the recess 25 having the second alignment surface 26 disposed therein forms a second interface 36. In the illustrated variant, each of the annular segments 8 includes a substantially identical first interface 35 disposed at the first end face and a substantially identical second interface 36 disposed at the second end face opposite the first end face. This allows any of the segments 8 to be stacked on top of each other, where the corresponding interfaces 35, 36 engage to form a connection, in particular a form-fitting connection between them. As Figure 4 can be seen, typically a second groove 12 is disposed beside the first interface 35, and another second groove 12 is disposed beside the second interface 36.

[0054] As Figure 4 shown, the segments 8 are detachably interconnected with each other in the assembled state. In the illustrated variant, each segment 8 includes at least one through-hole 21 for receiving a screw 22 (having a screw head) and a hole 20 for receiving the threaded end of the screw 22 of an adjacent segment 8. The screw 22 is used to clamp two adjacent segments 8 against the contact surface 34 of each other.

[0055] On the contrary, the words used in the specification are descriptive words rather than restrictive words, and it is understood that various changes can be made without departing from the scope of the present disclosure.

[0056] List of names 1 Transmission device 2 Base 3 Central die part 4 Axis of rotation 5 Injection molding device 6 Column 7 Sleeve 8 Segment (sleeve) 9 Bearing 10 First groove 11 Passageway 12 Second groove 13 Sealing ring 14 Channel 15 Diameter (column) 16 Opening (base) 17 Gear 18 Substrate (base) 19 Coupling plate 20 Hole (segment) 21 Through-hole (segment) 22 Screw (segment) 23 Protrusion 24 First alignment surface (protrusion) 25 Recess 26 Second alignment surface (recess) 27 Sensor (terminal section, sleeve) 28 Connector (passage) 29 Driver (coupling plate) 30 Linear guide (base) 31 Guide rail 32 First outer mold half 33 Second outer mold half 34 Contact surface 35 First interface 36 Second interface.

Claims

1. A transfer device (1) for transferring fluid between a base (2) and a central mold part (3) in an injection molding device (5), the central mold part (3) being rotatably arranged relative to the base (2) about a rotation axis (4), wherein: a. A column (6) is arranged in a sleeve (7), the column (6) and the sleeve (7) being arranged to be rotatable relative to each other about the rotation axis (4), and b. The sleeve (7) includes at least two annular segments (8) arranged along the column (6) in the direction of the rotation axis (4).

2. The transmission device (1) according to claim 1, wherein, At least one annular segment (8) is configured to transfer at least one fluid between the column (6) and the annular segment (8).

3. The transmission device (1) according to at least one of the preceding claims, wherein, At least one annular segment (8) includes a bearing (9) on the inner side to center the column (6) relative to the annular segment (8).

4. The transmission device (1) according to at least one of the preceding claims, wherein, At least one annular segment (8) includes at least one first groove (10) facing the column (6) in the installed position for transferring at least one fluid therebetween.

5. The transmission device (1) according to claim 4, wherein, At least one segment (8) includes a passage (11) for fluidly interconnecting the first groove (10) across the segment (8) to a fluid circuit.

6. The transmission device (1) according to claim 4 or 5, wherein, The passage (11) extends at least partially parallel to and / or at least partially perpendicular to the central axis of the at least one segment (8), fluidly interconnecting the first groove (10) to the exterior of the segment (8) and / or the passage of an adjacent segment (8).

7. The transmission device (1) according to at least one of the preceding claims 4 to 6, wherein, The annular segment (8) includes at least one second groove (12) configured to receive a sealing ring (13).

8. The transmission device (1) according to at least one of the preceding claims, wherein, At least two adjacent annular segments (8) are interconnected with respect to each other in a form - fit manner.

9. The transmission device (1) according to at least one of the preceding claims, wherein, At least two annular segments (8) each include a first interface (35) and a matching second interface (36) for connecting the at least two annular segments (8) to each other in a standardized manner.

10. The transmission device (1) according to at least one of the preceding claims, wherein, The column (6) is fixedly arranged relative to the base (2), and the sleeve (7) is arranged in the mold central part.

11. The transmission device (1) according to at least one of the preceding claims 1 to 8, wherein, The sleeve (7) is fixedly arranged relative to the base (2), and the column (6) is fixedly arranged relative to the central mold part (3) outside the central mold part (3).

12. The transmission device (1) according to at least one of the preceding claims, wherein, The column (6) includes at least one channel (14) extending in the longitudinal direction of the column (6) for transferring fluid.

13. The transmission device (1) according to at least one of the preceding claims, wherein, The column (6) has an interleaved design, where the diameter (16) decreases step - by - step along its general extension.

14. An injection molding device (5) comprising a transfer device (1) according to at least one of the preceding claims 1 to 9, the transfer device (1) fluidly interconnecting a base (2) and a central mold part (3), the central mold part (3) being rotatably arranged relative to the base (2) about a rotation axis (4).

15. The injection molding device (5) according to claim 14, wherein, The column (6) at least partially protrudes through an opening (16) of the base (2).

16. The injection molding device (5) according to at least one of the preceding claims 14 to 15, wherein, A gear (17) for driving the central mold part (3) surrounds the column (6).

17. The injection molding device (5) according to at least one of the preceding claims 14 to 16, wherein, The base (2) includes a substrate (18) that is at least partially manufactured by an additive manufacturing process.

18. The injection molding device (5) according to at least one of the preceding claims 14 to 17, wherein, The column (6) is supported during operation by a coupling plate (19) for the central die part (3), the coupling plate (19) being rotatably arranged about the axis of rotation on the base (2).

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