Spinning shunt manifold for producing melt spun filaments or yarns

Abstract

The invention relates to a spinning shunt manifold for producing melt-spun filaments or yarns, comprising at least one nozzle throat (2) having two vertical flat long sides (2a) and at least two vertical flat short sides (2b), in which at least one spinning assembly (3a-3d) is arranged, the invention relates to a spinning manifold (1) comprising a spinning assembly (3a-3d), below which a spinneret plate is arranged, and comprising at least one distribution block (4) having at least one spinning pump (9), to which liquid plastic is conveyed by an externally arranged extruder (10), the spinning pump conveys the liquid plastic to the at least one spinning assembly (3a-3d) through the at least one distribution block (4) by means of a distribution line (6a-6d) arranged inside the distribution block (4). The invention is characterized in that the at least one distribution block is arranged (4) on one long side (2a) of the nozzle throat (2) and the nozzle throat (2) has at least one surface heating element (12) on each of its vertical flat long and short sides, and the at least one distribution block (4) has at least one surface heating element (12) on at least a portion of its upper or lower outer surface, the surface heating element being designed to electrically heat at least the long and short sides and the portion of the outer surface.

Description

[0001] The present invention relates to a spinning distribution manifold for producing melt-spun filaments or yarns as defined in the preamble of claim 1.

[0002] Known spinning distribution manifolds have spinning components arranged in rows on the lower side of the spinning distribution manifold. Depending on the size of the system, a number of spinning distribution manifold modules are arranged side by side and firmly connected to each other by pipes for the heat transfer medium. Usually, oil or heat-conducting oil (dyphyl) is used as the heating medium, which exists in a liquid or gaseous phase in the heating circuit. The technical complexity of the systems for these heating media is very high and requires space, as vacuum stations, heating systems, high-temperature boilers and pressure vessels are needed, which must be replaced or modularly expanded in the case of an expansion of the spinning distribution manifold. In addition, for safety reasons, handling these media is dangerous and environmentally unfriendly in the event of a defect.

[0003] An example of a modular spinning distribution manifold is described in EP 3242966 A1. Another disadvantage is the generally uniform temperature level, which is advantageous for liquid plastics but consumes unnecessary energy for the individual components of the spinning distribution manifold, as the variable adjustment of the temperature level for the individual components can only be achieved by increased input. In order to regenerate individual components after the plastic has solidified, additional electric heating systems are known, which use hot air blowers among other things, which is disadvantageous in terms of system technology and energy consumption.

[0004] DE 21 2004 000 010 U1 discloses the provision of electric heating conductors on the upper and lower sides and the use of locally provided heating cartridges. The outer side of the intermediate plate provided with the melt pipelines is not heated.

[0005] Therefore, the problem to be solved by the present invention is to develop a cost-effective spinning distribution manifold that is very compact, modularly expandable and the temperature level of the individual components can be variably adjusted.

[0006] The present invention solves the problem posed by a spinning distribution manifold having the features defined in claim 1. Advantageous developments of the present invention are defined in the dependent claims.

[0007] The present invention relates to a spinning distribution manifold for producing melt-spun filaments or yarns, comprising at least one nozzle throat having two vertical flat long sides and at least two vertical flat short sides, in which at least one spinning component is arranged, a spinneret being provided below it, and at least one distribution block having at least one spinning pump, wherein liquid plastic is conveyed to the at least one spinning pump by an externally provided extruder, and the spinning pump conveys the liquid plastic to the at least one spinning component by means of distribution pipelines provided inside the distribution block through the at least one distribution block.

[0008] The present invention includes the following technical teachings: The at least one distribution block is arranged on a long side of the nozzle throat, and the nozzle throat has at least one surface heating element on each of its vertical flat long sides and short sides, and the at least one distribution block has at least one surface heating element on at least a part of its upper or lower outer surface, wherein the surface heating element is designed to electrically heat at least the long side, the short side, and the part of the outer surface.

[0009] Heating by means of an electric heating cylinder and using electric surface heating elements to coat the nozzle throat and the distribution block, and using an electric heating sleeve to coat the melt pipeline, no longer requires the entire previous heating medium, and significantly simplifies the design and production. The boiler, double-wall pipes, and complex welding and testing procedures can be omitted. In addition, the entire assembly of the previous heating system and vacuum station can be omitted. The design is more compact than the previous solutions and is more suitable for modular expansion. Transportation and installation are simplified. Although the heating cost due to electric energy is higher compared to fossil fuels, there are obvious advantages because the operation of the system also becomes safer and the investment cost is reduced. In addition, by driving individual surface heating elements, the temperature level can be more specifically controlled. Moreover, the overall temperature level can be easily adapted to the plastics used and / or the products to be manufactured by the input power.

[0010] A long side end wall of the distribution block is arranged on a long side of the nozzle throat, wherein the distribution block and the nozzle throat are connected by a common pipeline for feeding molten plastic into the spinning assembly. This structural arrangement of the distribution block on the nozzle throat shortens the supply pipeline of the liquid plastic.

[0011] In this case, at least the vertical outer surfaces of the nozzle throat are covered with surface heating elements because these outer surfaces radiate the most heat, and the plastic melt is vertically fed into the spinneret through the spinning assembly. The upper side of the nozzle throat with the spinning assembly can be conventionally insulated from the surrounding environment.

[0012] The surface heating element can be made of a combination of steel and brass or ceramic and is designed to heat the outer surfaces of the nozzle throat and the distribution block. Contrary to the prior art, the heating coil is not laid in a groove, but a flat element is arranged from the outside and detachably fastened, which generates a uniform temperature rise over the entire surface.

[0013] The surface heating element can be suspended and clamped to the outer surface using fastening elements so that they can be quickly removed for the maintenance of the spinning manifold.

[0014] Since the distribution block is at least covered with surface heating elements at the top and bottom, it can be used as a heat accumulator so that the supply pipeline from the distribution block to the spinning assembly does not freeze.

[0015] In an advantageous development of the invention, electrical heating can also be provided by a heating cartridge. The heating cartridge can be variably arranged in the spinning distribution manifold and can be controlled individually. In this way, the temperature levels of the individual surface heating elements and thus of the individual components of the spinning distribution manifold can be controlled separately with respect to the temperature level and the speed of the achievable temperature level.

[0016] Preferably, the nozzle throat has a central partition between every two spinning components, which is designed to accommodate the heating cartridge.

[0017] The fact that the surface heating element can be detached from the nozzle throat and / or the distribution block means that the spinning distribution manifold can be accessed very quickly for maintenance work. This avoids handling energy / heat transfer media (oil, heat transfer oil (dyphyl)) in a dangerous manner according to the prior art.

[0018] The distribution block can be formed from a plurality of components such that the feed line and the distribution lines can be incorporated into a single element of the distribution block. This can be done by manufacturing processes such as machining or electrical discharge machining. Open feed and / or distribution lines can be provided in at least one component of the distribution block, which are closed by a second component of the distribution block. The distribution block is preferably of a flat design and is connected to the nozzle throat by a long end edge. This means that the feed line and the distribution lines are horizontally aligned. It simplifies the installation of a suitable surface heating element.

[0019] The flat upper side of the distribution block serves to arrange the spinning pump on the distribution block or partially in the distribution block. This shortens the lines for conveying the liquid plastic.

[0020] By designing the distribution block to guide the liquid plastic from an external extruder to the spinning pump, an additional shortening of the lines is achieved.

[0021] The components of the distribution block are fastened together using fastening elements and clamped in a sealed manner such that the supply lines and the distribution lines are sealed from the surrounding environment. Integrating the supply lines and the distribution lines into the distribution block reduces the installation work of laying separate pipes, which in the prior art all had to be insulated and heated separately. The use of surface heating elements simplifies the construction of the distribution block.

[0022] The combination of the spinning pump and the distribution block enables various variants of feeding the liquid plastic, according to which the liquid plastic is fed to each spinning component without branching or with several branches in the distribution block. This allows the heating power to be reduced and adjusted based on the branching.

[0023] The spinning distribution manifold can have a control system that is designed to individually control the heating phases of the surface heating elements and the heating cylinders and to individually monitor the temperature levels of each surface heating element and each heating cylinder. If a surface heating element or a heating cylinder exceeds a preset temperature, the heating function can be stopped until all surface heating elements and heating cylinders are within the same tolerance range. Thus, the same temperature level is achieved for all spinning components, so that the filaments to be produced can have the same technical characteristics.

[0024] Temperature sensors can be used to determine the temperature of the surface to be heated, and the data from the temperature sensors can be transmitted to the control system. Preferably, the surface heating elements can be combined to form one heating zone or multiple groups of heating zones.

[0025] The control system of the spinning distribution manifold can have a warning function that is activated if the temperature exceeds or falls below the temperature tolerance and / or the preset temperature difference of the surface to be heated.

[0026] Measures for further improving the present invention will be described in more detail hereinafter with reference to the accompanying drawings in connection with the description of the preferred exemplary embodiments of the present invention, wherein:

[0027] Figure 1 : shows a detailed schematic diagram of the spinning distribution manifold;

[0028] Figure 2 : shows a cross-sectional view of the nozzle throat with a distribution block;

[0029] Figure 3 : shows a partial cross-sectional view through the upper part of the distribution block;

[0030] Figure 4 : shows a cross-sectional view of the spinning distribution manifold with the upper part of the distribution block cut in half;

[0031] Figure 5 : shows a schematic diagram of the pipe system in the distribution block;

[0032] Figure 6 : shows another schematic diagram of the pipe system in the distribution block;

[0033] Figure 7 : shows another schematic diagram of the pipe system in the distribution block.

[0034] Figure 1A detailed illustration of a spinning split manifold 1 is shown, which has an externally arranged extruder 10 that liquefies a solid plastic component and feeds the liquefied plastic through a melt line 11 into a distribution block 4. A spinning pump 9 is arranged on the distribution block 4 and pumps the liquid plastic into four spinning assemblies 3a - 3d through pipelines integrated in the distribution block 4. The spinning pump 9 is surrounded by a heat storage pipe 16 with a coated cylindrical heating element 15. The spinning assemblies 3a - 3d are arranged in a heated nozzle throat 2, and in this exemplary embodiment, the outer contour of the nozzle throat 2 is formed by at least two long sides 2a and two short sides 2b. The spinning assemblies 3a - 3d can be separately arranged from each other by a central partition 2c within the nozzle throat 2. There is a spinneret (not shown) below or integrated in the spinning assemblies 3a - 3d, and the liquid plastic is drawn out from this spinneret in the form of slender filaments. The distribution block 4 and the nozzle throat 2 have surface heating elements 12 on the outside, which are designed to keep the liquid plastic in a molten state. The melt line 11 is additionally heated by at least one heating sleeve 14 so that the liquid plastic does not solidify on the path between the extruder 10 and the distribution block 4. Each spinning split manifold 1 includes at least one nozzle throat 2 in which at least one spinning assembly 3a is arranged, and a distribution block 4 having at least one spinning pump 9. Compared with the nozzle throat 2 designed as an elongated block with approximately the same height and depth, the distribution block 4 is designed as a flat element including a lower plate 4a and at least one upper plate 4b here. The distribution block 4 consists of multiple components, where the feed pipelines 5, 5a, 5b and / or the distribution pipelines 6a - 6d are combined in a flat element 4a such that they are open on one side. This can be achieved by, for example, machining or electrical discharge machining manufacturing processes. At least a second flat element 4b of the distribution block is designed to close the open pipelines. The feed pipelines 5, 5a, 5b and / or the distribution pipelines 6a - 6d can be correspondingly combined in two flat elements, or only combined in one flat element (top or bottom) of the distribution block 4. The advantage lies in a simple manufacturing process, which means that separate pipelines do not have to be laid, heated, and insulated. Another advantage is the integration of the spinning pump 9 on or in the distribution block 4, whereby the waste heat from the distribution block 4 can be used for the spinning pump 9, and the pipelines to be heated remain short.

[0035] One long side end wall of the distribution block 4 is arranged on the nozzle throat 2, and the distribution block 4 and the nozzle throat 2 are connected by a common pipeline for feeding the plastic melt into the spinning assemblies 3a - 3d. In this exemplary embodiment, all the vertical flat long sides and short sides 2a, 2b of the nozzle throat 2 are covered with surface heating elements 12. The central partition 2c that separates at least the respective spinning assemblies 3a - 3d from each other has an electrically driven heating cylinder 13, which is designed to generate the required temperature within the nozzle throat 2. The distribution block 4 has at least one surface heating element 12 at the top and bottom. The surface heating element 12 is clamped or suspended onto the surface to be heated by fastening elements (not shown). This fastening is designed such that the surface heating element 12 can be removed very quickly.

[0036] The heating sleeve 14 consists of a glass-insulated heating conductor, which is manufactured to precisely fit the melt pipeline. For example, this heating sleeve can operate at a heating power of 600 W and heat the melt pipeline to 320 °C. Depending on the shape of the feed pipeline, one or more heating sleeve elements 14 can be used.

[0037] The surface heating element 12 can be made of a combination of steel and brass or ceramic, and is designed to heat the outer surfaces of, for example, the nozzle throat 2 and the distribution block 4 to 320 °C. For example, each surface heating element 12 can operate with a heat output of 300 W. They can have slots for hanging in the device and holes for fastening using screws or other fastening elements. There are also holes through which the heating cylinder or heat sensor can be inserted into the respective components of the spinning distribution manifold.

[0038] The heating cylinder 13 can be made of a high-temperature-resistant steel alloy or ceramic, and can be inserted into the nozzle throat 2 and the distribution block 4, for example, by screwing it in, and is designed to heat the components up to 320 °C. For example, each heating cylinder 13 can operate with a heating power of 100 W. The heating cylinder 13 can be combined with a thermocouple to monitor the current temperature.

[0039] According to Figure 2 , a number of central partitions 2c (only the spinning assemblies 3c and 3d are shown here) are provided between the spinning assemblies 3a, 3b; 3b, 3c; 3c, 3d in the nozzle throat 2, which can also have a number of heating cylinders 13 and / or a surface heating element 12 to ensure that the spinning assemblies 3a - 3d have a uniform temperature on all sides.

[0040] Figure 3Shows the distribution block 4, which consists essentially of an upper plate 4b and a lower plate 4a. A surface heating element 12 has been removed from the upper plate 4b, and the upper plate 4b is shown as being half cut. Here, grooves can be seen that are milled into the parting surface of the two plates 4a, 4b as pipelines or only into one of the plates 4a or 4b. A feed pipeline 5 extends from the melt pipeline 11 (the heating sleeve 14 is shown as a half section) to the spinning pump 9, which is also shown as a half section in the lower region. Starting from the spinning pump 9 mounted on or in the upper plate 4b of the distribution block 4, four distribution pipelines 6a - 6d each lead to the nozzle throat 2 and then into the spinning assemblies 3a - 3d, where the nozzle throat 2 has associated openings through which the polymer melt is fed into the spinning assemblies 3a - 3d via the distribution pipelines 6a - 6d. As a result, the working pressure of the extruder 10 transports the liquid plastic from the extruder 10 via the melt pipeline 11 and the feed pipeline 5 to the spinning pump 9. This spinning pump 9 transports the liquid plastic via the distribution pipelines 6a - 6d to the respective spinning assemblies 3a - 3d. This arrangement of the spinning pump 9 on or in the distribution block 4 enables the variable arrangement of the feed pipeline and the distribution pipelines in order to transport the liquid plastic to the spinning assemblies 3a - 3d with as few branches (divergences) as possible.

[0041] Figure 4 The top view of the upper plate 4b without the spinning pump 9 and without the distribution block is shown. Figure 3 Here, the feed pipeline 5 and the four distribution pipelines 6a - 6d can be seen, each pipeline leading to one of the spinning assemblies 3a - 3d shown here. Figure 4 The top view in also shows the surface heating element 12, which surrounds the spinning splitter manifold 1 on the vertical outer surface. Between the spinning assemblies 3a - 3d, the central partition 2c from Figure 2 can also be seen, and it is arranged between the spinning assemblies 3a, 3b; 3b, 3c; 3c, 3d and can accommodate the heating cylinder 13. Depending on the number of spinning pumps 9, the number of feed pipelines 5, and the number of spinning assemblies 3a - 3d, the number of distribution pipelines 6a - 6d milled in the distribution block 4 also changes. There may be a variant in which the plastic melt is branched by means of a so-called hydraulic split before and / or after the spinning pump 9, i.e., it is divided. This describes the fact that the plastic melt is independently split by the milled branches or pipelines in the distribution block 4 under the pressure of the spinning pump 9 or the extruder 10 and is thus fed to the spinning assemblies 3a - 3d.

[0042] Figure 5A simplified arrangement of the distribution lines 6a - 6d extending from the spinning pump 9 to the spinning assemblies 3a - 3d is shown. The spinning split manifold 1 has four spinning assemblies 3a - 3d, which are arranged adjacent to each other and are separated from each other by a heated central partition 2c. The distribution block 4 has a single spinning pump 9, through which the polymer melt is distributed to the spinning assemblies 3a - 3d by means of the distribution lines 6a - 6d. The feed line or distribution lines 5, 6a - 6d have no branches (0 splits).

[0043] In Figure 6 it, the spinning split manifold 1 also has four spinning assemblies 3a - 3d, which are arranged adjacent to each other, and each is separated from the other spinning assemblies by a heated central partition 2c. The distribution block 4 has two spinning pumps 9a, 9b, through which the polymer melt is distributed. The feed line 5 is divided into two lines 5a, 5b (1 split) within the distribution block 4, and one of the lines or 5a, 5b supplies a separate spinning pump 9a, 9b. Thus, two spinning pumps 9a, 9b are provided on the distribution block 4, and they each supply the polymer melt to two spinning assemblies 3a, 3b; 3c, 3d respectively. The two spinning assemblies 3a, 3b; 3c, 3d each receive the polymer melt supply from the spinning pumps 9a, 9b without further branching, and each has a separate distribution line 6a - 6d.

[0044] Figure 7 The spinning split manifold 1 with four spinning assemblies 3a - 3d and a single spinning pump 9 on the distribution block 4 is shown again, where one pump line 7 after the spinning pump 9 is divided into two pump lines 7a, 7b and branches out by means of two additional distribution lines 6a, 6b; 6c, 6d to form two spinning assemblies 3a, 3b; 3c, 3d respectively. Each distribution line 6a - 6d supplies one spinning assembly 3a - 3d again, so that for four spinning assemblies 3a - 3d and one spinning pump 9, the polymer melt is sent to the spinning assemblies through a total of three branches (3 splits).

[0045] The melt line 11 is heated by a heating jacket 14, the electric heating cartridges 13 are variably used, and the nozzle throat 2 and the distribution block 4 are covered by surface heating elements 12. The entire previous heating medium is no longer required, and the design and manufacturing are significantly simplified. The boiler, double-walled pipes, and complex welding and testing procedures can be omitted. In addition, the entire assembly of the previous heating system and vacuum station can be omitted. The design is more compact than the previous solutions and is more suitable for modular expansion. Transportation and installation are simplified. Contrary to the prior art where the distribution block 4 is not heated but only insulated, it now has its own surface heating element 12, which means that the distribution block 4 now also serves as a heat accumulator. The surface heating element 12 can be removed very quickly, making it easier to maintain the spinning manifold. The integration of the distribution lines 6a - 6d in the distribution block 4 is beneficial for manufacturing and assembly, as well as the heating of the distribution lines 6a - 6d. The arrangement of the spinning pump 9 on or in the distribution block 4 enables the optimization of the branch distribution in the distribution lines 6a - 6d of the distribution block 4 according to the spinning pack to be supplied. The conveying path of the liquid plastic remains short, and the waste heat from this distribution block 4 can be used for the spinning pump 9.

[0046] The spinning manifold has a control system that is designed to individually control the heating phases of the heating jacket 14, the surface heating elements 12, and the heating cartridges 13, and to individually monitor the temperature levels of each heating jacket 14, each surface heating element 12, and each heating cartridge 13. If a heating jacket 14, a surface heating element 12, or a heating cartridge 13 exceeds a preset temperature, the heating function can be stopped until all heating jackets 14, surface heating elements 12, and heating cartridges 13 are within the same tolerance range.

[0047] The temperature of the surface to be heated is measured directly in the relevant component by a temperature sensor, for example, in a hole close to the surface heating element 12. This temperature sensor can also be used to control the heating element.

[0048] Additional temperature sensors monitor the spinning manifold 1 and are able to, for example, shut down the extruder 10 or the spinning pump 9.

[0049] The heating jackets 14, the surface heating elements 12, or the heating cartridges 13 can be combined to form one heating zone or multiple groups of heating zones. Additional temperature sensors not used for control can perform monitoring and control functions.

[0050] The spinning manifold control system has a warning function if the temperature tolerance is exceeded or not reached and / or a large difference is detected when activating the heating zone. The alarm function is activated if the tolerance exceeds the tolerance time set by the customer, or if the sensor is defective, or if the temperature exceeds the maximum set value, or if the temperature exceeds the maximum operating temperature, or if the heating zone does not reach the set temperature within the desired time or rises too fast within the defined time.

[0051] List of reference numerals

[0052] 1 Spinning flow dividing manifold

[0053] 2 Nozzle throat

[0054] 2a Long side

[0055] 2b Short side

[0056] 2c Central partition

[0057] 3a - 3d Spinning assemblies

[0058] 4 Distribution block

[0059] 4a Lower plate

[0060] 4b Upper plate

[0061] 5, 5a, 5b Feed pipelines

[0062] 6a - 6d Distribution pipelines

[0063] 7, 7a, 7b Pump pipelines

[0064] 9, 9a, 9b Spinning pumps

[0065] 10 Extruder

[0066] 11 Melt pipeline

[0067] 12 Surface heating element

[0068] 13 Heating cylinder

[0069] 14 Heating sleeve

[0070] 15 Cylindrical heating element

[0071] 16 Heat storage pipe

Claims

1. A spinning split manifold for producing melt-spun filaments or yarns, said spinning split manifold comprising at least one nozzle throat (2), said nozzle throat (2) having two vertically flat long sides (2a) and at least two vertically flat short sides (2b), at least one spinning pack (3a - 3d) being provided in said nozzle throat, a spinneret being provided below said spinning pack (3a - 3d), and said spinning split manifold comprising at least one distribution block (4), said distribution block (4) having at least one spinning pump (9), wherein, liquid plastic is conveyed to said at least one spinning pump (9) by an externally provided extruder (10), and said spinning pump conveys said liquid plastic to said at least one spinning pack (3a - 3d) through said at least one distribution block (4) by means of distribution pipelines (6a - 6d) provided inside said distribution block (4), characterized in that said at least one distribution block (4) is provided on one long side (2a) of said nozzle throat (2), and said nozzle throat (2) has at least one surface heating element (12) on each of its vertical flat long sides and short sides, and said at least one distribution block (4) has at least one surface heating element (12) on at least a part of its upper outer surface or lower outer surface, wherein said surface heating element is designed to at least electrically heat said long side, said short side, and said part of said outer surface.

2. The spinning split manifold according to claim 1, characterized in that, said surface heating element (12) is composed of a steel - brass combination or made of ceramic, and is designed to heat the outer surfaces of said nozzle throat (2) and said distribution block (4).

3. The spinning split manifold according to claim 1, characterized in that, said electrical heating is additionally provided by a heating cylinder.

4. The spinning split manifold according to claim 1, characterized in that, said nozzle throat (2) has a central partition (2c) between every two spinning packs (3a, 3b; 3b, 3c; 3c, 3d), and said central partition is designed to accommodate a heating cylinder (13).

5. The spinning split manifold according to claim 1, characterized in that, said surface heating element (12) is detachably attached to said nozzle throat (2) and / or said distribution block (4).

6. The spinning split manifold according to claim 1, characterized in that, said distribution block (4) is formed by a plurality of components, wherein open feed and / or distribution pipelines (5, 5a, 5b; 6a - 6d) are provided at least in one component (4a) of said distribution block and are closed by a second component (4b) of said distribution block.

7. The spinning split manifold according to any one of the preceding claims, characterized in that, said at least one spinning pump (9) is provided on said distribution block (4) or is partially provided inside said distribution block (4).

8. The spinning split manifold according to claim 7, characterized in that, The distribution block (4) is designed to guide the liquid plastic from the external extruder (10) to the spinning pump (9).

9. The spinning split manifold according to any one of the preceding claims, characterized in that the liquid plastic in the distribution block (4) is conveyed to each spinning assembly (3a - 3d) without or with branches.

10. The spinning split manifold according to claim 6, characterized in that the multi - part distribution blocks (4a, 4b) are fastened together by means of at least two or more fastening elements and clamped in a sealed manner.

11. The spinning split manifold according to any one of the preceding claims, characterized in that it is provided with a control system which is designed to individually control the heating phases of the surface heating elements (12) and the heating cylinders (13), and to individually monitor the temperature levels of each surface heating element (12) and each heating cylinder (13).

12. The spinning split manifold according to claim 11, characterized in that by means of temperature sensors, the temperature of the surface to be heated is determined, and the data from the temperature sensors are transmitted to the control system.

13. The spinning split manifold according to any one of claims 11 to 12, characterized in that the surface heating elements (12) can be combined together to form one heating zone or a plurality of heating zone groups.

14. The spinning split manifold according to claim 11, characterized in that the control system of the spinning split manifold has a warning function which is activated when the temperature exceeds or falls below the temperature tolerance and / or the preset temperature difference of the surface to be heated.

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