Apparatus for manufacturing parisons for containers from plasticized plastic material and extrusion head

Abstract

The utility model relates to a kind of equipment for the parison for container manufactured by plasticized plastic material, the plastic material can be transported to multiple discharge sites (22) separated from each other along supply direction (26) from inlet (20) by means of channel guide (10) inside extrusion head (12), the channel guide constitutes branch arrangement structure (14) with branch site (16) and connecting channel (18), the discharge site is respectively used for the manufacturing device (24) of each parison along with the discharge direction (28) different from the supply direction (26), characterized in that, the material flow of the plastic material can be controlled at least in a portion of the channel guide (10) by means of adjusting device (34).

Description

Technical Field

[0001] This utility model relates to an apparatus for manufacturing preforms for containers from plasticized plastic material, wherein the plastic material can be transported from an inlet along a supply direction to multiple separate discharge points by means of a channel guide within an extruder head, the channel guide forming a branched arrangement structure with branching sections and connecting channels, and the discharge points supplying each preform manufacturing apparatus along a discharge direction different from the supply direction. Background Technology

[0002] A multi-extrusion head for an extrusion blow molding machine is known from DE102007030677B4, comprising:

[0003] - A plurality of first extrusion heads, which are fixedly arranged side by side in a first row forming a first plane.

[0004] - A plurality of second extrusion heads, the second extrusion heads being fixedly arranged side by side in a second row forming a second plane parallel to the first plane.

[0005] - A first dispensing device, the first dispensing device having:

[0006] - A first distribution channel, wherein the first distribution channel is disposed in a plane corresponding to the first plane and wherein each first distribution channel is connected to a first extrusion head and all first distribution channels have a common first material inlet.

[0007] - A second dispensing device, the second dispensing device having:

[0008] - A second dispensing channel, the second dispensing channel being disposed in a plane corresponding to the second plane and wherein each second dispensing channel is connected to a second extrusion head and all second dispensing channels have a common second material inlet, the first dispensing device being in the region of the first plane and the second dispensing device being separated in the region of the second plane.

[0009] - A third dispensing device, the third dispensing device having a third dispensing channel, the third dispensing channel being disposed in a third plane extending perpendicularly to the first plane and the second plane.

[0010] - The two third distribution channels originate from a common third material inlet;

[0011] - One of the two third distribution channels is connected to the first material inlet and the other of the two third distribution channels is connected to the second material inlet;

[0012] - The third dispensing device is separated in the third plane.

[0013] Overall, the direction of the distribution channel is chosen such that the material is evenly distributed onto the extrusion head. This distribution also simplifies cleaning, and the design of the channel within the channel guide does not necessarily require a rigid cylindrical bore.

[0014] A melt distributor for plastic melt is known from DE102020212987A1. This melt distributor has a melt distribution block, which has a multi-channel system comprising...

[0015] - It has an inlet for the plastic melt.

[0016] Then, by means of a series of successively branched and rebranched branches, the melt channels are divided into multiple generations, leading to multiple outlets. Each generation of the melt channels has a smaller diameter, and its cross-sectional shape and diameter are chosen such that the flow resistance for the plastic melt through the multi-channel system remains at least substantially the same.

[0017] - The melt distributor can be used to continuously and seamlessly process two different plastic melts in such a way that the subsequent plastic melt can wash away the preceding plastic melt without any flow dead zones, and / or

[0018] - When changing from a first type of plastic melt to a different second type of plastic melt, the flow resistance along the multi-channel system remains at least substantially the same, thus the melt distributor is suitable for a variety of different melts.

[0019] Therefore, a melt distributor is implemented that provides a larger total discharge cross-sectional area of ​​polymer melt downstream of the discharge side of the melt distributor than that conveyed upstream of the melt distributor. This aims to address potential limitations in structural design and dimensional determination, particularly in terms of extrusion tooling.

[0020] An apparatus for manufacturing and filling containers is known from EP3684695B1, in which a single elliptical tube of plasticized plastic material from a single extruder is extruded into an open die. Filler material is introduced into the corresponding container by means of a filling device, at least by means of a filling pin that passes through at least one row of through-holes during operation. The extruder has a cuboid shell, and when viewed parallel to the orientation of the corresponding filling pin, the structural height of the extruder is less than the length of the extruder along the corresponding row of through-holes. The cuboid shell is constructed of a lower shell portion and an upper shell portion, wherein at least one shell portion has a channel guide for the plasticized plastic material, the channel guide containing an annular space, at the center of which is a receiving tab having a separate longitudinal receiving portion in the form of a through-hole for the corresponding filling pin to pass through. This achieves extrusion of a plastic tube with a uniform wall thickness distribution while reducing the required installation space. Furthermore, undisturbed sterile air guidance is achieved within the apparatus. Utility Model Content

[0021] Based on this prior art, the purpose of this invention is to provide a multi-extrusion head with an integrated melt distributor, which is an improvement over the prior art.

[0022] An apparatus according to the invention solves the relevant problems in its entirety.

[0023] By means of an adjusting device, the material flow rate of the plastic material can be controlled at least in a portion of the channel guide, making it possible to individually adjust the volumetric flow rate or discharge velocity of the plasticized plastic material for each hose or preform to be extruded in the region of the corresponding discharge section, in which the flow direction of the plastic material is redirected from the supply direction within the extruder head to the discharge direction for manufacturing the hose by means of the manufacturing device. Here, if necessary, it is also possible to completely shut off at least a portion of the channel guide by means of the adjusting device, for example, to enable cleaning and / or maintenance work on the manufacturing device after the extruder head.

[0024] This achieves a multi-extrusion head for manufacturing pressure-formed hollow plastic bodies, in which multiple extrusion tools arranged side-by-side by the multi-extrusion head simultaneously and synchronously extrude multiple hose-shaped preforms, which are then conveyed directly or, after the hose segments are separated, by means of a transport system to a blow molding cavity. In the blow molding cavity, after the cavity is closed, the hoses, or preforms, are expanded into the hollow plastic body by means of a pressure differential. Subsequently, the corresponding mold is opened and the empty container is demolded, or, in the preferred application of the so-called BFS method (described in detail in DE102020002077A1, DE102020004564A1, and EP2909000B1), further filled with a preset fluid by means of a filler pin, sealed, and then removed from the mold. In the relevant manufacturing process, the material flow rate or discharge speed from the corresponding discharge nozzle for the plastic hose to be produced can be very precisely adjusted by means of the setting device, which is beneficial to the entire production process.

[0025] In a preferred embodiment of the device according to the present invention, the setting device presets a corresponding material flow rate starting from the center of the freely accessible side of the extrusion head; thus achieving a particularly simplified operation for the device.

[0026] In another preferred embodiment of the device according to this utility model, the adjusting device has a plurality of individual adjusting devices, the number of which depends on the number of connection channels and their sections to be controlled separately. Particularly preferably, the number of each adjusting device corresponds to the number of discharge points that are separate from each other. This allows for precise metering of the desired material flow rate for the plastic material at each discharge point.

[0027] In another preferred embodiment of the device according to this utility model, the corresponding adjustment device is constituted by a sleeve, which is fixed to the wall portion of the extrusion head by passing through the free side of the extrusion head. An adjustment device, which is longitudinally movable within the sleeve, utilizes one free end region to pre-set the free opening cross-section of the configurable channel section and utilizes the other free end region for operation. Due to the sleeve structure, all adjustment devices can be designed in a standardized manner, which improves reliability and reduces manufacturing costs. In particular, one free side of the extrusion head is well accessible from the outside to the corresponding adjustment device and allows for manual operation, including operation by means of an operating system.

[0028] Preferably, the sleeve is designed as a screw-in sleeve with external threads for fixing in the wall portion of the extruder head, and a threaded section is provided on the inner side of the screw-in sleeve for longitudinal movement of the adjusting device. Furthermore, it is preferred that the corresponding adjusting device has a convex shell-shaped portion, particularly a hemispherical rounded portion, on its free end side. Thus, the feedable shell, combined with the opposing walls of the correspondingly configurable channel sections of the channel guide, forms a variable damper or throttling cross-section, resulting in a pre-defined change in the free channel cross-section. Due to this increased flow resistance, the material or volumetric flow varies according to the resulting pressure drop, which is, in principle, related to the viscosity of the plastic material used. In any case, the material flow rate or material flow within the channel guide can be controlled or adjusted very precisely.

[0029] Advantageously, the corresponding regulating device is positioned at an angle of 80° to 100°, preferably 90°, to the orientation of the configurable connection channel. This minimizes undesirable interference with the flow of the plastic material in the region of the regulating device, such as dead zones.

[0030] In another particularly preferred embodiment of the device according to this invention, the plastic material is discharged sequentially through the last connecting channels of the channel guide in the supply direction into the annular discharge portion of the extruder head, the discharge portion being passable by the molding and / or filling unit of the manufacturing apparatus. Preferably, the last connecting channel enters the annular discharge portion with one or more turns, particularly two turns, and the adjusting device is positioned in the region of the last turn before the channel section enters the discharge portion to adjust the flow rate. In principle, it is also possible to operate two adjacent discharge portions using only one adjusting device, thus reducing the number of adjusting devices.

[0031] In another preferred embodiment of the device according to this utility model, at least a portion, preferably all, of the setting devices are arranged along a common operating plane on the extrusion head. This allows for simultaneous observation of all extruded hoses from the center of the extrusion head and corresponding fine-tuning and / or monitoring of the setting of the setting devices.

[0032] The subject of this invention is also an extrusion head, specifically equipped with the device described above. The extrusion head has a head housing, within which a channel guide is provided. The channel guide has multiple branching portions and connecting channels, and at least a portion of the channel guide has different cross-sectional shapes and / or cross-sectional areas in the form of at least one connecting channel. In particular, the cross-sectional area of ​​the channel on the inlet side is larger than the cross-sectional area of ​​the branched channels. Preferably, a circular channel cross-section is selected on the inlet side and in the region of the setting device, while non-circular, i.e., preferably superelliptical (also known in technical terms as Lamé ovate), and particularly preferably longitudinally elliptical cross-sectional shapes can be used in between. The longitudinally elliptical shape is characterized by two long, parallel, opposing straight edges and two identical, opposing semicircles. This results in unobstructed and substantially uninterrupted flow guidance within the multiple extrusion heads.

[0033] In another particularly preferred embodiment of the extruder head according to this invention, the corresponding connecting channel of the channel guide has a circular (round) dispensing cross-section starting from its inlet or dispensing side. This circular dispensing cross-section transitions within the channel guide to a non-circular (e.g., longitudinally elliptical or hyperelliptical) discharge cross-section after a predetermined distance, which preferably decreases in size relative to the inlet or dispensing cross-section. Here, it is further preferred that a non-circular cross-section be provided in the region between the inlet and the corresponding outlet of a section of the channel guide. Although this may result in accompanying pressure losses within the melt guide, unexpectedly, the associated cross-section proves particularly advantageous for the uniformity of the overall flow guidance. The longitudinally elliptical cross-sectional shape of the channel (also known in technical terms as an elongated orifice) can be manufactured much more easily, much faster, and therefore much more economically than an elliptical or hyperelliptical cross-section, for example, by milling.

[0034] For a compact structure, in another preferred embodiment of the extruder according to the present invention, the channel guide has two turns in the direction of the corresponding discharge part, or the connecting channel branches out from the remaining channel guide at a 90° angle in the direction of the discharge part.

[0035] Here, it is particularly preferred to further specify that: starting from the entrance of the channel guide, the channel guide undergoes a total turn of 90° to 180° toward the corresponding discharge part, particularly preferably about 170°. Attached Figure Description

[0036] The device according to the present invention will now be explained in detail with reference to an embodiment shown in the accompanying drawings. In the schematic and non-total-scale drawings:

[0037] Figure 1 A cross-section of the multi-extrusion head is shown in perspective view;

[0038] Figure 2 Shown in the form of a longitudinal section according to Figure 1 A multi-extrusion head with an inserted filling pin device;

[0039] Figure 3 Showing according to Figure 1 A top view of the multi-extrusion head;

[0040] Figure 4 Shown in a similar top view according to Figure 1 and Figure 3 The implementation method of the modified multi-extrusion head;

[0041] Figure 5 and Figure 6 An adjustment device of the adjustment apparatus is shown in a view and a sectional view, as in Figure 1 , Figure 3 , Figure 4 As used in [the context]. Detailed Implementation

[0042] Figure 1 A portion of an apparatus is shown for manufacturing a tubular preform (not shown) from plasticized plastic material for container products, including ampoules and / or bottles. For this purpose, the apparatus has a channel guide 10 integrally marked as 10 within the extruder head 12. The channel guide 10 is constituted by a branching arrangement 14 having individual branch portions 16 and connecting channels 18 located therebetween. Figure 1 (Not marked in the text). Additionally, the passageway guide 10 leads from the central entrance 20 (in... Figure 1 (Not marked in the text) extends from multiple spatially separated emission points 22 (in Figure 1 (Not marked in the text), the discharge points are respectively supplied to the manufacturing apparatus 24 for each preform, as in Figure 2 As shown in the diagram. Overall, the illustrated device can be used to include eight emission points 22 by means of... Figure 2 The manufacturing apparatus 24 manufactures eight hose-shaped preforms for container products, with each discharge point 22 equipped with a preform according to... Figure 2 Manufacturing apparatus 24.

[0043] exist Figure 1 The horizontal supply direction, marked by arrow 26, is perpendicular to the vertically extending discharge direction, which in... Figure 1 The number 28 is indicated by arrow 28. Overall, Figure 1A simple plate-shaped multi-extrusion head 12 is shown, which has a total of eight discharge nozzles 29, the discharge nozzles being downwardly connected to the eight discharge sites 22 (in Figure 1 (Not marked in the text). On... Figure 1 , Figure 3 and Figure 4 Only the lower portion 30 of the extruder 12 is shown, and it is evident that the upper portion 32, having a corresponding channel guide, overlaps upwards to close the device, which is from... Figure 2 This is exemplarily demonstrated. Thus, a largely enclosed or encapsulated channel guide 10 for the plastic melt is provided externally.

[0044] in particular Figure 3 As shown, the channel guide 10 has a small number of branch sections 16 for supplying eight discharge sections 22; in the present case, there are a total of seven branch sections 16. Furthermore, a total of fourteen connecting channels 18 extend between the branch sections 16 as part of the entire channel guide 10. Within the scope of the modular structure, the extruder head 12 and its channel guide 10 can be easily adapted to changing conditions, such as situations where there are more or fewer than eight discharge sections 22 depending on the number of preforms to be manufactured, and the discharge sections must be supplied with plastic material within the scope of manufacturing the preforms. However, considering the efficiency of flow guidance and manufacturing methods, it is always advantageous for the discharge sections 22 to be arranged in pairs, but an odd number of discharge sections is also possible.

[0045] The device also includes an adjustment device, marked as 34, which controls or adjusts the flow rate of plastic material within the channel guide 10. In an embodiment of the device (not shown), the adjustment device 34 may control only a portion of the channel guide and, as in this embodiment, not simultaneously control all discharge points 22 along the conveying direction. The adjustment device 34 presets a corresponding material flow rate from the center and is located on the freely accessible front end side 36 of the extruder head 12. Furthermore, the adjustment device 34 has multiple individual adjustment devices 38, the number of which depends on the number of connecting channels 18 and their sections 48 to be controlled separately within the range of material discharge to each discharge point 22. In the present case, each discharge point 22 is equipped with a separate adjustment device 38 in the inflow.

[0046] Such as especially Figure 5 and Figure 6As shown, the corresponding adjusting device 38 is composed of a sleeve 40 fixed to the wall portion 42 of the extruder head 12 by passing through the free end side 36. An adjusting device 44, longitudinally movable within the sleeve 40, uses one free end region 46 to pre-set the free opening cross-section of the configurable channel section 48 of the channel guide 10 and uses its other free end region 50 for operation. In this embodiment, the adjusting device 44 of the corresponding sleeve 40 is shown in a forward-extended position, thus reducing the free cross-section of the configurable channel section 48 of the channel guide 10, thereby reducing the amount of plastic material reaching the discharge point 22 via this channel guide 10. Conversely, in the extremely retracted position of the adjusting device 38, the configurable connecting channel 18 or channel section 48 is discharged as much as possible, thus having the largest free channel cross-section to ensure the highest material flow rate. Figure 5 and Figure 6 The sleeve 40 shown is designed as a screw-in sleeve and accordingly has an external thread 52 for fixing in the wall portion 42 of the extruder head 12, and a threaded section 56 on the inner side of the sleeve housing 54 is used to allow the rod-shaped adjusting device 44 to move longitudinally within the sleeve housing 54.

[0047] Furthermore, the corresponding regulating device 44 has a shell-like, particularly hemispherical, rounded portion on its free front end side, which is in the form of an end region 46. As can be seen in the figures, the regulating device and its rounded portion 58 can completely enclose the channel section 48 with a circular cross-section in the fully advanced region. According to the present invention, this is achieved when the radius of the hemispherical rounded portion 58 is only slightly smaller than the radius of the channel section in the region of the regulating device, preferably the difference between the radius of the channel section and the radius of the rounded portion is less than 0.06 mm, particularly preferably less than 0.04 mm. As the retraction of the regulating device 44 gradually increases, the cross-section is gradually released in the form of a throttle valve or damper, which is used to allow the plastic material to flow smoothly and continuously for supplying the discharge section 22. To improve the screwing of the sleeve 40 into the wall portion 42 of the extruder head 12, a polygon 60, particularly a hexagon, is used for the use of conventional manipulators, such as wrenches. The sleeve 40 also has another polygon 62 at its actuating end 50, which facilitates manual operation and simplifies the operating system (not shown), thereby enabling automatic operation of the adjustment device 34 and all its adjustment components 38. Here, the corresponding adjustment component 44 operates at a preferred 90° angle to the direction of the connecting channel 18, which can be configured as a channel segment 48. This facilitates simplified operation and allows for rapid advancement of the corresponding adjustment component 44. This also applies to... Figure 4In one embodiment of the modification, after the final branch section 16 and before the subsequent discharge section 22 in the flow, the channel segment 48 enters at a right angle into the corresponding annular discharge section 22. Otherwise, according to Figure 4 The implementation method of the change largely corresponds to that according to Figure 1 The solution. Correspondingly, for those following... Figure 4 The solution used in Figure 1 The same reference numerals in the accompanying drawings and the descriptions associated with them also apply to the drawings. Figure 4 The solution.

[0048] According to Figure 4 The implementation method is the opposite, in accordance with Figure 1 and Figure 3 In the solution, the final connecting channel 18 and its corresponding channel segment 48, in sequence, turn twice before entering the annular discharge portion 22, resulting in a U-shaped bend. Adjustment devices 38 are embedded in the leg regions below this U-shaped bend. Thus, in a particularly space-saving manner, smooth channel guidance for the plasticized material is achieved before discharge into the annular discharge portion 22, according to... Figure 2 The pin-shaped manufacturing or filling device 24 passes through the discharge portion respectively. Here, other possibilities for flow guidance are possible. In any case, in accordance with... Figure 1 and Figure 3 In the solution, the conveying of the plastic melt is bent by a total of 180° from the inlet 20 to the immediate front of the outlet 22.

[0049] The extrusion head 12 shown in the accompanying drawings has a head housing 64 as a whole, in which a channel guide 10 is provided. Here, in particular... Figure 3 and Figure 4 As shown, starting from the inlet 20, two connecting channels 18 are subsequently provided at the first branch portion 16 at a circular cross-section 66, the connecting channels being constructed in the form of longitudinal ellipses 66. Instead of longitudinal ellipses, these connecting channels may also have elliptical or superelliptical cross-sections.

[0050] At the first branch 16 following the inlet 20, the two connecting channels 18 (relative to their central longitudinal axis) form an angle of approximately 120° to 130° with each other. The subsequent branch 16 also forms a corresponding angle range, and after two turns in a U-shape, the final channel segment transitions from the last branch 16 into two adjacent, opposing discharge sections 22. Figure 4 The implementation plan is in accordance with the above description. Figure 1 and Figure 3The solution differs because there, with only one turning section, the final channel section 48 branches off at a right angle to the upstream branch section 16 as viewed along the fluid direction before entering the annular discharge section 22. If in accordance with... Figure 1 and Figure 3 In the solution, the plastic material of the fluid flows vertically downwards at inlet 20. Before entering the associated discharge point 22, the flow direction is turned 180° upwards at the final turning point of channel section 48. Contrary to the established expectation in fluid dynamics of avoiding significant changes in the direction of melt flow (e.g., to avoid uneven flow resistance), this invention unexpectedly achieves a strong turning in a small space. Figure 4 One 90° turn and Figure 1 and Figure 3 The two 90° turns did not adversely affect the overall flow behavior.

[0051] according to Figure 2 The longitudinal section shows the annular discharge portion 22 between the two head portions 30 and 32, along the direction of... Figure 2 Viewed from a certain angle, the vertical extension of the annular discharge portion 22 is smaller upwards than downwards. Furthermore, the annular discharge portion 22 is in fluid or media-guided connection with the annular discharge nozzle 29 on the lower side of the extruder head 12, and the associated annular discharge channel 68 opens to the environment to discharge plastic material at the discharge portion 70 at the corresponding discharge nozzle 29. Additionally, the discharge channel 68 is traversed by a central filling tube 72, which... Figure 2 The discharge location is shown below. The filling pin or filling tube 72 can be adjusted in height relative to the discharge channel 68 by means of the adjusting device 74. The relevant structure is common, for example shown in DE102017008803A1 and DE102017008802A1, and therefore will not be described in detail here. In any case, the plastic material is discharged at the lower end of the corresponding discharge nozzle 29 in a vertical discharge direction, which is... Figure 2 The middle part is depicted by arrow 28.

[0052] In summary, this utility model proposes an apparatus for manufacturing and filling containers in which multiple hoses of plasticized plastic material extruded from an extruder head 12 can be introduced directly or by means of a transport system into an open mold. The extruder head 12 has an inlet opening in the form of an inlet 20 and multiple outlet openings in the form of outlet sections 22 for the molten plastic material, as well as a cuboid shell having a lower head portion 30 and an upper head portion 32, which has multiple adjusting devices 38 of an adjusting device 34 for adjusting the material flow rate on the relevant outlet sections 70. As already described, the rectangular shell that essentially constitutes the extruder head 12 is composed of at least one lower shell portion or head portion 30 and at least one upper shell portion or head portion 32, wherein at least the lower shell portion or head portion 30 has a channel guide 10 for multiple branches of the plasticized plastic material, the channel guide terminating in a plurality of annular spaces that form part of the discharge portion 22, from which the plastic material can be discharged respectively from the annular spaces correspondingly to the lower discharge portion 70, the angle formed by the flow direction of the plasticized plastic material from the inlet 20 and the flow direction of the plasticized plastic material before entering the corresponding annular discharge portion is 180°, but preferably also 170°, as in accordance with Figure 1 and Figure 3 As described in the implementation method. Conversely, in accordance with Figure 4 In this embodiment, the angle between the inlet 20 and the outlet of the associated discharge point is 90° or substantially 90°.

[0053] Because all discharge points 22 are identical in shape, the amount of plastic material for container molding discharged from each discharge point 22 via its discharge outlet 70 depends only on the individual adjusting device 38. This allows for precise delivery of a preset amount to the corresponding discharge point 22.

[0054] Another feature of this invention is that all the adjusting devices 38 (in particular in the form of sleeves 40) are provided on the free end side or front end side 36 of the extruder head 12 opposite to the inlet opening or inlet 20 for adjusting the material flow of the plastic material, thereby achieving very good accessibility for the adjusting device 34 as a whole and its individual adjusting devices 38.

Claims

1. An apparatus for manufacturing preforms for containers from plasticized plastic material, the plastic material being transported from an inlet (20) along a supply direction (26) to a plurality of separate discharge sites (22) via a channel guide (10) within an extruder (12), the channel guide forming a branched arrangement structure (14) having branch sections (16) and connecting channels (18), the discharge sites supplying manufacturing apparatus (24) for each preform along discharge directions (28) different from the supply direction (26), characterized in that, The material flow rate of the plastic material can be controlled at least in a portion of the channel guide (10) by means of the adjusting device (34).

2. The device according to claim 1, characterized in that, The setting device (34) presets the corresponding material flow rate from the center of the freely accessible side (36) of the extrusion head (12).

3. The device according to claim 1 or 2, characterized in that, The adjustment device (34) has multiple individual adjustment devices (38), the number of which depends on the number of connection channels (18) and their segments (48) to be operated separately.

4. The device according to claim 3, characterized in that, The corresponding adjustment device (38) is composed of a sleeve (40) which is fixed to the wall portion (42) of the extrusion head (12) in such a way that it passes through the freely accessible side (36) of the extrusion head (12). The adjustment device (44) which is longitudinally movable within the sleeve (40) uses one free end region (46) of the adjustment device to preset the free opening cross section of the configurable channel section (48) and uses the other free end region (50) of the adjustment device for operation.

5. The device according to claim 4, characterized in that, The sleeve (40) is designed as a screw-in sleeve with external threads (52) for fixing in the wall portion (42) of the extrusion head (12), and has a threaded section (56) on the inner side of the screw-in sleeve for longitudinal movement of the adjusting device (38).

6. The device according to claim 4 or 5, characterized in that, The corresponding adjustment device (44) has a rounded portion (58) in the form of a shell on its free end side.

7. The device according to claim 6, characterized in that, The rounded portion (58) is a hemispherical rounded portion (58).

8. The device according to claim 4 or 5, characterized in that, The channel segment (48) that can be configured to the regulating device (44) has a circular cross-section at least in the embedded region of the regulating device (44).

9. The device according to claim 7, characterized in that, The radius of the hemispherical rounded portion of the regulating device (44) differs by less than 0.06 mm from the radius of the circular channel section (48) that can be provided to the regulating device (44).

10. The device according to claim 7, characterized in that, The radius of the hemispherical rounded portion of the regulating device (44) differs by less than 0.04 mm from the radius of the circular channel section (48) that can be provided to the regulating device (44).

11. The device according to claim 4 or 5, characterized in that, The corresponding adjustment device is set at an angle of 80° to 100° to the direction of the connection channel (18) that can be configured.

12. The device according to claim 4 or 5, characterized in that, The corresponding adjustment device is set at a 90° angle to the direction of the connection channel (18) that can be configured.

13. The device according to claim 1 or 2, characterized in that, The plastic material can be discharged into the annular discharge portion (22) in the extruder (12) via the sequentially corresponding last connecting channel (18) observed along the supply direction (26) of the channel guide (10), the discharge portion being passable by the molding and / or filling unit of the manufacturing device (24).

14. The device according to claim 4 or 5, characterized in that, The plastic material can be discharged into the annular discharge portion (22) in the extruder (12) via the sequentially corresponding last connecting channel (18) observed along the supply direction (26) of the channel guide (10), the discharge portion being passable by the molding and / or filling unit of the manufacturing device (24).

15. The device according to claim 14, characterized in that, The last connecting channel (18) in sequence enters the annular discharge section (22) with one or more turns, and the adjusting device (38) is located in the area of ​​the last turn before the channel section (48) enters the discharge section (22) for adjusting the flow rate.

16. The device according to claim 14, characterized in that, The last connecting channel (18) in sequence enters the annular discharge section (22) with two turns, and the adjusting device (38) is located in the area of ​​the last turn before the channel section (48) enters the discharge section (22) for adjusting the flow rate.

17. The device according to claim 3, characterized in that, At least a portion of the setting devices (38) extend along a common operating plane on the extrusion head (12) in a manner that is arranged parallel to each other.

18. The device according to claim 3, characterized in that, All the adjustment devices (38) extend along a common operating plane on the extrusion head (12) in a manner that is arranged parallel to each other.

19. An extruder having the device of any one of claims 1 to 18, the extruder having a head housing (64) in which a channel guide (10) is provided, the channel guide having a plurality of branch portions (16) and connecting channels (18) in a branched manner, at least a portion of the channel guide (10) having different cross-sectional shapes at an inlet (20) and an outlet in the form of at least one connecting channel (18), and / or the cross-sectional shape (66) present at the inlet (20) continuously narrows when viewed toward the outlet side having the discharge portion (22) over at least a portion of the channel length.

20. The extruder according to claim 19, characterized in that, The cross-sectional shape (66) is a circular cross-section.

21. The extruder according to claim 19, characterized in that, The corresponding connecting channel (18) of the channel guide (10) has a circular channel cross-section starting from its entrance (20), which transitions into a longitudinally elliptical channel cross-section after a preset distance.

22. The extruder according to any one of claims 19 to 21, characterized in that, A non-circular cross-section is provided in the area between the inlet (20) of the channel guide (10) and the corresponding discharge part (22).

23. The extruder according to claim 22, characterized in that, The non-circular cross-section is a longitudinally elliptical or superelliptical cross-section.

24. The extruder according to any one of claims 19 to 21, characterized in that, The channel guide (10) has two turns toward the corresponding discharge part (22), or the connecting channel (18) branches out from the remaining channel guide (10) at a 90° angle toward the discharge part (22).

25. The extruder according to any one of claims 19 to 21, characterized in that, Starting from the inlet (20) of the channel guide (10), the channel guide undergoes a total turn of 90° to 180° toward the corresponding discharge part (22).

26. The extruder according to any one of claims 19 to 21, characterized in that, Starting from the inlet (20) of the channel guide (10), the channel guide undergoes a total of 170° of turning in the direction of the corresponding discharge part (22).

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