Spinning assembly of melt spinning device with overpressure protection device

Abstract

The invention relates to a spinning assembly of a melt spinning device having an overpressure protection device, the spinning assembly (10) of the melt spinning device (1) having an overpressure protection device (21) for protecting the spinning assembly against a predetermined overpressure (KUE), comprising a mounting adapter (11) for feeding a plastic melt to a template (20) for extrusion of the plastic melt, and a melt dispensing element (16) located upstream of the template in the feeding direction (SF) of the plastic melt and intended for dispensing the plastic melt onto the template (20), the template being non-movably mounted in a tank housing (15) of the spinning assembly. The mounting adapter is pressed against the melt dispensing member by a biasing member (13) and is movable between a dispensing position (OP) for dispensing the plastic melt to the template (20) and an open position (GP) for releasing the plastic melt to the melt outflow channel opening (25).

Description

Technical Field

[0001] The invention relates to a spin pack for a melt spinning device having an overpressure protection device for protecting the spin pack from a predetermined overpressure and to a related device for producing synthetic yarns, which has a melt spinning device for extruding synthetic yarns from a plastic melt. Background Art

[0002] The general prior art discloses that, based on a plastic melt produced, for example, by an extruder from plastic chips, a plurality of filaments are formed from the plastic melt by means of a melt spinning device having at least one die assembly, the filaments are subsequently combined to form a thread and are wound by means of a winder to form a winding bobbin for further processing.

[0003] Plastic melt is supplied to the mold assembly at a predetermined pressure through a feed line.

[0004] However, monitoring the pressure occurring at every location of a melt-spinning device, in particular at the die assembly, in order to avoid possible damage caused by excessively high melt pressures in the feed line is very complex.

[0005] Damage may occur, for example, when an overcooled die assembly is installed in a melt spinning device. This may lead to critical overpressure and this may lead to component failure in the lines and components of the melt spinning device.

[0006] Possible damage results could be tearing of the spin pack pot and rupture of the melt feed line in the spinning beam of the melt spinning unit.

[0007] In both cases of damage, workshop personnel are also exposed to considerable safety risks.

[0008] In order to avoid such damage, it is proposed, for example, to have explosion-proof devices in the mold assembly.

[0009] DE102018008473A1 discloses a melt-spinning device, which has a die head seat and a spinneret group. The die head seat has a connector with a feed channel, and the feed channel leads to one end face of the connector. The spinning assembly is fixed to the connector through a connecting adapter, wherein the feed channel is connected to the inlet channel of the connecting adapter. For sealing, the sealing bushing is concentrically maintained relative to the inlet channel and the feed channel. In order to design a safe and inexpensive overpressure protection device, the sealing bushing has a pressure protection part in addition to the sealing part, and the pressure protection part closes the pressure relief channel opening. The pressure protection part is damaged at a predetermined pressure, thereby opening the pressure relief channel, and then the excess pressure can be dissipated through the pressure relief channel by allowing the fed plastic melt to flow out.

[0010] CN102465346B discloses a melt spinning device with a melt pump, which is partially installed in a heating box. The melt pump is used to supply plastic melt to a mold assembly installed in a spinning assembly receptacle. The mold assembly is installed in the spinning assembly receptacle by means of a mounting adapter, which also has a feed line for the plastic melt. The mounting adapter has a pressure relief line at a predetermined point above the tank shell on which the mold assembly is installed, and the pressure relief line is connected to the feed line through a wall with a predetermined thin wall thickness. In the event of excessive pressure, the thin wall is designed to rupture, with the result that the pressure can be dissipated by discharging the plastic melt.

[0011] In both prior art solutions, pressure relief can only be achieved by component failure, which results in the disadvantage that the mold assembly needs to be assembled and maintained after the corresponding protection device has burst.

[0012] Furthermore, the bursting discs of the respective anti-burst mechanisms may cause damage to the mold assembly. Summary of the invention

[0013] Therefore, the object of the present invention is to provide a spinning assembly of a melt-spinning device, which has an overpressure protection device for protecting the spinning assembly from a predetermined overpressure, and to provide a device for producing synthetic yarn, which has a spinning assembly for extruding synthetic filaments. The spinning assembly and the device for producing synthetic filaments can solve or at least alleviate the above-mentioned problems.

[0014] According to the invention, in terms of a spin pack, this object is achieved by a spin pack.

[0015] One aspect of the present invention provides a spinning assembly of a melt spinning device, which has an overpressure protection device for protecting the spinning assembly from a predetermined overpressure, comprising a mounting adapter for feeding a plastic melt to a die plate to extrude the plastic melt and a melt extrusion member, the melt extrusion member is located upstream of the die plate in the feeding direction of the plastic melt and is intended to distribute the plastic melt to the die plate, and the die plate is immovably mounted in a tank housing of the spinning assembly. The mounting adapter is pressed against the melt distribution member by a biasing member and can be moved between a distribution position for distributing the plastic melt to the die plate and an open position for releasing the plastic melt to a melt outflow channel opening.

[0016] The overpressure protection device of the spin pack is designed so that the melt outlet channel opening is opened in the event of a predetermined overpressure, as a result of which the pressure accumulated in the spin pack can be dissipated and bursting and / or failure of the spin pack clamps and feed lines can be prevented.

[0017] When the overpressure drops back to a predetermined operating pressure, the biasing member may again press the mounting adapter back to the dispensing position.

[0018] The operation of the overpressure protection device is basically similar to that of a spring-loaded check valve, which opens the end opening at a certain pressure.

[0019] As a result, an overpressure protection device can be incorporated with uncomplicated measures, which can also be restarted when triggered and does not have to be triggered only once and then replaced, as is the case with burst protection devices.

[0020] The die plate has multiple capillaries for extruding filaments from the plastic melt. The die plate can also be called a die assembly.

[0021] According to one configuration of the spin pack, the mounting adapter has a melt feed channel which is pressed by a biasing member against a die assembly feed line in the melt distribution member in a fluid-tight manner and with a predetermined contact pressure.

[0022] The predetermined contact pressure ensures that the plastic melt is fed safely and fluid-tightly to the die plate via the melt distribution element under operating-induced pressure conditions.

[0023] However, if the pressure built up in the spinning pack exceeds the contact pressure, the overpressure protection device is triggered, wherein the overpressure protection device can be reused and re-triggered as described above when the overpressure protection device has been moved into the starting position of the dispensing position.

[0024] According to another configuration of the spinning assembly, the mounting adapter is installed in a screw sleeve, wherein the screw sleeve has a mounting portion for mounting on a melt distributor and a flange portion for accommodating a biasing member, wherein the biasing member is positioned in the flange portion so that the biasing member in the mounting adapter is pressed against the melt distributor with a predetermined contact pressure.

[0025] The overpressure protection device of the spinning assembly comprises the mounting adapter, a melt distributor and a biasing member. The biasing member presses the mounting adapter against the melt distributor at a predetermined contact pressure, so that a fluid-tight connection can be achieved under normal operating conditions and the plastic melt can be extruded to form filaments.

[0026] However, if the contact pressure exerted by the biasing member is exceeded by a predetermined overpressure, the biasing member cannot compensate for the force and is compressed, with the result that a gap opens between the melt distribution member and the mounting adapter, which then opens the melt outflow channel opening, through which the plastic melt can be discharged, and the previously accumulated pressure is dissipated and reduced together with the plastic melt flow rate.

[0027] According to another configuration of the spinning assembly, the contact pressure applied by the biasing member is less than a predetermined critical bursting force, which can be provided by a predetermined critical overpressure in the mold assembly feed line, wherein at an operating pressure of about 250 to 350 bar, the contact pressure that can be established by the biasing member is designed for safe feeding of the plastic melt, and / or the contact pressure that can be established by the biasing member is less than the overpressure protection trigger force, which can be provided at an overpressure of about 350 to 400 bar in the mold assembly feed line.

[0028] The biasing member is responsible for pressing the mounting adapter fluid-tightly against the melt distribution member. As a result, the overpressure protection device is triggered when a corresponding pressure opposite to the biasing member contact pressure is established in the mold assembly feed line.

[0029] Decisive limit values ​​here may be a predetermined bursting pressure and / or a predetermined bursting force. The bursting pressure or overpressure is understood to be the pressure exerted by the plastic melt in the spinning pack, which may cause essential components of the spinning device to fail. The operating pressure is the pressure exerted by the plastic melt at which the plastic melt reaches, passes through and leaves the spinning pack for optimal feeding and extrusion, allowing the formation of a filament bundle. The bursting force is understood to be a force that may cause component failure.

[0030] According to another configuration of the spin pack, the overpressure protection device is formed by the interaction of a mounting adapter which is movably mounted in the screw sleeve and is positioned biased against the melt distribution element by a biasing element.

[0031] The overpressure protection device has essentially few components, which interact in such a way that a safe triggering is achieved at a predetermined overpressure and also allows the action of the overpressure protection device to be reused and reestablished in the distribution location. Due to the few required components, an operationally reliable design of the overpressure protection device can also be achieved.

[0032] According to another configuration of the spin pack, the spin pack has a displacement mechanism which is mounted upstream of the filter medium in the tank housing.

[0033] Using filter media, the plastic melt can be removed and filtered of impurities and foreign matter that affect the quality of the filament to be extruded.

[0034] The filter medium is removably mounted in the tank housing, so that the filter medium can be removed from the tank housing at regular intervals and correspondingly cleaned of accumulated dirt.

[0035] According to another configuration of the spinning assembly, the pot housing is mounted on the threaded sleeve in a fixed manner via a pot mounting portion of the pot housing in the form of a threaded portion, wherein the threaded sleeve is mounted between the pot mounting portion and the melt distributor.

[0036] Mounting the tank housing via a threaded screw connection allows for ready access to the various components of the spin pack as necessary for maintenance.

[0037] According to another configuration of the spin pack, the biasing element comprises an elastically deformable material, wherein the biasing element comprises in particular a helical spring, a coil spring, a helical coil spring and / or a wave spring.

[0038] In order to provide the required contact pressure, an elastically deformable material is advantageously used, as a result of which the overpressure protection device or the biasing element can also be reused after triggering.

[0039] The biasing member may be, for example, an elastically deformable rubber member.

[0040] Preferably, the spring element can be selected from different shapes and types. For example, the biasing element of the overpressure protection device can be a combination of a helical spring, a coil spring, a helical coil spring and / or a wave spring included in one of the above embodiments.

[0041] Each of the above spring types is available in different contact pressures and in different sizes.

[0042] Depending on the installation space in the spin pack for the biasing element to be used and the required contact pressure in the spin pack, the most suitable type of spring can be provided and installed in the spin pack.

[0043] According to another configuration of the spin pack, the spin pack includes first and second displacement mechanisms, first and second filters, and first and second capillary portions in a die plate, all arranged adjacent to each other to form first and second filament bundles.

[0044] The overpressure protection of the spin pack can be provided in a spin pack which comprises only one capillary section which is designed for extruding a single filament bundle.

[0045] However, the overpressure protection device can also be used in the case of a spin pack which comprises two capillary sections in a die plate, which are arranged adjacent to each other and through which a respective first and second filament bundle can be extruded. Each capillary section has a dedicated filter medium. Two filament bundles can be extruded simultaneously via the two capillary sections.

[0046] In certain configurations of the spin pack, it is also possible to provide a single filter medium for both capillary sections.

[0047] According to the invention, in terms of the device, this object is achieved by a device for producing synthetic threads.

[0048] One aspect of the present invention provides a device for producing synthetic yarns, which has a melt-spinning device for extruding synthetic yarns from a plastic melt and a winding device for drawing out, conveying and winding the yarns extruded by the melt-spinning device, wherein the melt-spinning device includes a spinning assembly having at least one overpressure protection device according to the aforementioned configuration.

[0049] According to another configuration of the device, the melt-spinning device comprises a heating box, in which the spinning assembly part is installed, wherein the feed pipeline installed in the heating box is movably connected to the spinning assembly, in particular the melt feed channel, at a fluid-tight distance, as a result of which the overpressure protection device has a triggering area.

[0050] The overpressure protection device requires a predetermined triggering area or gap for the biasing element so that a gap that opens the melt outflow channel opening can be generated. Therefore, the spinning assembly must be connected to the feed line in such a way that the triggering of the overpressure protection device does not allow any damage to the feed line.

[0051] For this purpose, a correspondingly movable telescopic coupling can be provided between the spin pack and the feed line, which coupling allows a fluid-tight movement of the spin pack toward the feed line when the overpressure protection device is triggered.

[0052] The advantages and configurations of the spin pack and associated apparatus have been described in the above configurations, and further advantages can be derived from the description of the embodiments of the spin pack of the present invention and the associated apparatus for producing synthetic yarn using the spin pack of the present invention listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The spinning assembly and the related devices of the present invention will be explained in more detail below based on several embodiments with reference to the accompanying drawings. In the drawings:

[0054] Figure 1 A schematic view of a device for producing synthetic yarn, comprising a melt-spinning device and a winding device,

[0055] Figure 2 Show Figure 1 A cross-sectional view of a melt spinning device,

[0056] Figure 3 The invention shows an overvoltage protection device Figure 1 A cross-sectional view of the spinning assembly in FIG.

[0057] Figure 4 A cross-sectional view of a spin pack with a non-triggered overpressure protection device is shown, the melt path feeding to the die plate is free, and

[0058] Figure 5 A cross-section through a spinning pack is shown with a triggered overpressure protection device, the melt path up to the die plate being blocked.

[0059] Reference numerals list

[0060] 1 Melt spinning device

[0061] 2 Winding device

[0062] 3 Meeting point

[0063] 4.1,4.2 First Godet Roller, Second Godet Roller

[0064] 5 Godet Roller

[0065] 6 Chuck

[0066] 7 Pressure roller

[0067] 8 Sleeve

[0068] 9. Winding the bobbin

[0069] 10 Spinning assembly

[0070] 11 Install the adapter

[0071] 12 Screw socket

[0072] 13 Biasing element, spring element

[0073] 14 Channel Entrance

[0074] 15 tank shell

[0075] 16 Melt distribution parts

[0076] 17.1, 17.2 First and second melt distribution parts

[0077] 18 Filter container

[0078] 19.1,19.2 First and second filter media

[0079] 20 Templates

[0080] 21 Overvoltage protection device

[0081] 22.1,22.2 First and second melt feed channels

[0082] 23.1,23.2 Feed lines for the first and second mold assemblies

[0083] 24 Melt collection space

[0084] 25 Melt outflow channel opening

[0085] 26.1,26.2 The first and second capillary sections

[0086] 28 Tank Installation

[0087] 29 Threaded sleeve

[0088] 30 Heating box

[0089] 31 Heat transfer medium inlet

[0090] 32 Heat transfer medium outlet

[0091] 33 Insulation

[0092] 34 Installation

[0093] 35 Cover

[0094] 36 Inner shell

[0095] 37 Pump receptacle

[0096] 38 Spinning assembly receptacle

[0097] 39 Retaining pin slot

[0098] 40 Melt Pump

[0099] 42 Drive shaft

[0100] 44 Pipeline mounting plate

[0101] 45 Melt supply line

[0102] 46.1,46.2 First feed line, second feed line

[0103] 48 Pipeline Distribution

[0104] 50 Retaining pin

[0105] 51 Head

[0106] 52 Pin holder

[0107] A Spacing

[0108] BK Explosive Force

[0109] EF Pressure relief outflow direction

[0110] F Silk thread

[0111] FF filament tow

[0112] FF1,FF2 First and second filament bundles

[0113] GP Open Position

[0114] KUE Predetermined overpressure

[0115] OP Allocation Location

[0116] S1 First gap

[0117] S2 Second gap

[0118] SF Feed direction DETAILED DESCRIPTION

[0119] The following will describe a spinning assembly 10 according to the invention with an overpressure protection device 21. The overpressure protection device 21 functions like a check valve, which opens the pressure relief opening 25 under a predetermined pressure or a predetermined force. If appropriate, this also allows the reuse and continued use of the overpressure protection device 21 after it has been triggered.

[0120] Figures 2 to 5 The embodiment of the spin pack 10 shown is designed for producing two filament bundles, specifically a first filament bundle FF1 and a second filament bundle FF2. In order to form the two filament bundles FF1 and FF2, substantially identical components and members are provided for each filament bundle, which have the same function and configuration and are positioned or formed in a mirror-symmetrical manner relative to the central axis (dash-dotted line) of the spin pack 10. These components and members are indicated and described with the same reference numeral "B" and supplemented with "B".1 and / or "B".2, such as the first melt feed channel 22.1, the second melt feed channel 22.2, wherein B is understood as a placeholder for the respective reference numerals.

[0121] In an embodiment not shown here, the spin pack 10 can be designed for extruding a single filament bundle FF. In this embodiment not shown, in this case, only a single one of each component and member is provided with an additional reference numeral, except for the overpressure protection device 21. The overpressure protection device can be provided in the spin pack 10 once, twice or more.

[0122] Figure 1 The present invention is a schematic diagram of a device for producing a synthetic yarn F, which comprises a melt-spinning device 1 and a winding device 2 for drawing out, conveying and winding a filament bundle FF extruded from the melt-spinning device 1 .

[0123] Melt spinning device 1 Figure 1 The die plate 20 is shown, from which filament bundles FF are extruded from a plastic melt and fed to the die plate 20 , which filament bundles merge at a junction point 3 to form a thread F.

[0124] The silk thread F is drawn out from the winding device 2 through the first and second godet rollers 4.1 and 4.2, and the godet rollers are movably mounted on the godet roller frame 5 of the winding device 2.

[0125] The winding device 2 has a transfer unit (not shown) which transfers the thread F to a winding bobbin 9. The sleeve 8 is detachably mounted on the chuck 6 of the winding device 2.

[0126] Using a transfer unit and a pressure roller 7 , the thread is transferred to a sleeve 8 and wound into a winding bobbin 9 by simultaneous rotation of a chuck 6 and a sleeve 8 detachably fixed thereto.

[0127] Figure 2 Show Figure 1 A cross-sectional view of a melt spinning device 1 is shown.

[0128] The template 20 is mounted in the spin pack 10. The spin pack 10 is mounted in a spin pack receptacle 38, which forms a mounting seat in the heating box 30 of the melt spinning device 1. The heating box 30 has a heat insulator 33, which surrounds and insulates an inner shell 36, into which a heating means such as diphenyl can be fed and discharged through a heat transfer medium inlet 31 and a heat transfer medium outlet 32. A heat transfer medium such as diphenyl is required in order to control the temperature of the spin pack 10 accordingly and to keep it warm so that the plastic melt does not cool too quickly.

[0129] If the spin pack 10 is too cold, an undesirable pressure buildup may occur, because, for example, the plastic melt in the die plate 20 solidifies prematurely and extrusion of the filaments to form a filament bundle FF cannot be achieved. This then leads to a pressure buildup in the spin pack 10 and to corresponding damage to the feed lines 46.1, 46.2 and / or to bursting of other components of the spin pack 10.

[0130] exist Figure 2 In the embodiment shown, the spin pack 10 has a first capillary section 26.1 for forming a first filament bundle FF1 and a second capillary section 26.2 for forming a second filament bundle FF2 in the die plate 20. However, a spin pack having only a single capillary section 26 can also be used for the overpressure protection device 21 to form a single filament bundle FF. In order to feed the plastic melt to the spin pack, a first feed line 46.1 and a second feed line 46.2 are provided in the inner shell 36 for the first capillary section 26.1 and the second capillary section 26.2, respectively.

[0131] The plastic melt is fed into the first and second feed lines 46.1, 46.2 via a melt pump 40. The melt pump 40 is driven via a drive shaft 42 extending from the heating box 30 so that the associated drive can be arranged spaced apart from the heating box 30 and is not exposed to the necessary thermal load of the heating box 30.

[0132] The melt pump 40 is mounted in a pump receptacle 37 in the heating box 30, which can be closed by a cover 35. A drive shaft 42 of the melt pump 40 extends through a passage opening in the cover 35 out of the heating box 30 until a drive device drives the drive shaft 42 to obtain a predetermined delivery output of the melt pump 40.

[0133] A pipeline mounting plate 44 is provided on the side of the melt pump 40 opposite to the drive shaft 42. A pipeline distributor 48 is fluid-tightly connected to the pipeline mounting plate 44, on which a first and a second feed pipeline 46.1 and 46.2 are provided for feeding the plastic melt from the pump to the spinning assembly. The melt feed pipeline 44 is provided for feeding the plastic melt, which is fed into the pump at the pump inlet through the pipeline mounting plate 44, so that the plastic melt fed by the feed pipeline 44 can be pumped or shifted from the pump 40 to the feed pipelines 46.1, 46.2.

[0134] Figure 3 A cross-sectional view of a spin pack 10 with an overvoltage protection device 21 is shown.

[0135] The spin pack 10 comprises a mounting adapter 11 which is intended to be connected in a spin pack receptacle 38 and has first and second melt feed channels 22 . 1 , 22 . 2 , through which plastic melt can be fed to first and second die assembly feed lines 23 . 1 , 23 . 2 formed in the melt distributor 16 .

[0136] The mounting adapter 11 may allow the spin pack 10 to be mounted in the spin pack receptacle 38 .

[0137] The screw sleeve 12 is mounted on a mounting adapter 11 having a T-shaped cross section, wherein the screw sleeve 12 has a passage opening 14, and the mounting adapter 11 is mounted in the passage opening in a liquid-tight manner by fitting. The fitting is designed so that the mounting adapter 11 can be moved out of the passage opening of the screw sleeve 12 to a predetermined extent under a force greater than a predetermined force to form a gap S1 and open a melt outflow passage opening 25, such as Figure 5 shown.

[0138] With the overpressure protection device 21, the compressive force for moving the mounting adapter 11 out must additionally overcome the contact pressure exerted by the biasing element 13. The compressive force can be, for example, a predetermined bursting force BK, which can occur in the spin pack 10 at a predetermined overpressure KUE.

[0139] The mounting adapter 11 is mounted with the offset member 13 in the screw sleeve 12 pressed against the melt distribution member 16, as a result of which, under working conditions and at a predetermined operating pressure, the plastic melt can be fed to the first and second melt displacement members 17.1, 17.2 through the first and second melt feed channels 22.1, 22.2, the first and second mold assembly feed pipelines 23.1, 23.2, and fed to the first and second filter media 19.1, 19.2 toward the first and second capillary portions 26.1, 26.2 of the template 20.

[0140] The screw sleeve 12 is mounted on the melt distributor 16 via a mounting portion 34, which preferably has an external thread. The melt distributor 16 is fixed in the pot housing 15 of the spinning assembly 10 by means of a threaded connection via a threaded sleeve 29, which is connected to the corresponding threaded portion of the pot housing 15 in a fixed position.

[0141] The tank housing 15 is mounted on a threaded sleeve 29 in a fixed manner via a tank mounting portion 28 of the tank housing 15 in the form of a threaded portion, wherein the threaded sleeve 29 is mounted between the tank mounting portion 29 and the melt distributor 16 .

[0142] The melt collecting space 24 is formed around the peripheral surface of the end of the mounting adapter 11 pointing to the template 20, and the melt collecting space has a melt outflow channel opening 25. When the overpressure protection device is moved through the gap S1, the fed plastic melt can flow out through the melt outflow channel opening 25 under the triggering of the overpressure protection device 21; see Figure 5 .

[0143] When the overpressure protection device 21 is triggered, the plastic melt fed by the pump 40 is collected in the melt collecting space through the melt distributor 16, which is then arranged spaced apart from the bottom of the melt collecting space 24, and the plastic melt is discharged through the melt outflow channel opening.

[0144] The biasing member 13 of the overpressure protection device 21 is retained in the screw sleeve 12 by a retaining pin 50 mounted in the retaining pin receiving groove 39. The retaining pin 50 has a head 51 around which the spring member 13 or the biasing member 13 abuts and which retains the biasing member 13 in the retaining pin receiving groove 39 at a predetermined spacing.

[0145] The biasing element 13 can thereby exert a contact pressure on the mounting adapter 11 , as a result of which the mounting adapter 11 is pressed against the melt distribution element 16 in a fluid-tight manner.

[0146] Figure 4 The spin pack 10 is shown with a non-triggered overpressure protection device 21 so that a plastic melt can be fed to the capillary sections 26 . 1 , 26 . 2 to form a first and a second filament bundle FF1 , FF2 .

[0147] The screw sleeve 12 is spaced apart from the surface of the threaded sleeve 29 by a predetermined distance A. The predetermined distance A is also maintained by the head 51 of the retaining pin 50 .

[0148] Figure 4 Also shown are the feed direction SF of the plastic melt and the direction of action of the contact pressure K exerted by the biasing element 13 due to the configuration and arrangement of the biasing element 13 in the screw sleeve 12 .

[0149] Figure 5The spinning head assembly is shown with the overvoltage protection device 21 triggered.

[0150] As can be seen here, the biasing element 13 has been compressed by the critical overpressure KUE. As a result, the mounting adapter 11 can be pressed out of the passage opening 14 of the screw sleeve 12 and open the melt collecting space 24 and the associated melt outflow passage opening 25, as a result of which, in the open position of the overpressure protection device 21, the plastic melt fed in the feed direction SF can be discharged in the pressure relief direction EF.

[0151] Explosive force (direction of action is also Figure 5 ) has exceeded the contact pressure K applied by the biasing member 13 and / or the retaining force of the mounting adapter 11 in the channel opening 14, as a result, the mounting adapter 11 can be moved out of the channel opening 14 of the screw sleeve 12, which allows the gap S1 in the melt collecting space 24 to be opened, as a result of which the melt outflow channel opening 25 is also opened.

[0152] In such Figure 5 In the triggering state shown, the bursting force causes the mounting adapter 11 to also maintain a certain distance from the screw sleeve 12 through the gap S2 and be pressed out of the passage opening 14 .

Claims

1. A spinning assembly (10) of a melt spinning device (1), the spinning assembly (10) having an overpressure protection device (21) for protecting the spinning assembly from a predetermined overpressure (KUE), the overpressure protection device (21) comprising a mounting adapter (11) and a melt distributor, the mounting adapter (11) being used to feed plastic melt to a die plate (20) for extruding the plastic melt, the melt distributor being located upstream of the die plate in a feeding direction (SF) of the plastic melt and intended to distribute the plastic melt to the die plate (20), the die plate (20) being immovably mounted in a tank housing (15) of the spinning assembly, characterized in that The mounting adapter is pressed against the melt distributor by a biasing member (13) and is movable between a dispensing position (OP) for dispensing the plastic melt to the die plate (20) and an open position (GP) for releasing the plastic melt to a melt outlet channel opening (25).

2. The spinning assembly (10) according to claim 1, characterized in that The mounting adapter (11) has melt feed channels (22.1, 22.2) which are pressed against mold assembly feed lines (23.1, 23.2) in the melt distribution element (16) by the biasing element (13) in a fluid-tight manner and with a predetermined contact pressure (K).

3. The spinning pack (10) according to at least one of the preceding claims 1 and 2, characterized in that The mounting adapter is mounted in a screw sleeve (12), wherein the screw sleeve has a mounting portion (34) for mounting on the melt distributor (16) and a flange portion for accommodating the biasing member (13), wherein the biasing member (13) is positioned in the flange portion so that the biasing member (13) presses the mounting adapter (11) against the melt distributor with a predetermined contact pressure (K).

4. The spinning pack (10) according to at least one of the preceding claims, characterized in that The contact pressure applied by the biasing member is less than a predetermined critical bursting force (BK), which can be provided by a critical predetermined overpressure in the mold assembly feed line (23.1, 23.2), wherein, for a working pressure of approximately 250 to 350 bar, the contact pressure established by the biasing member is designed for safe feeding of the plastic melt, and / or the contact pressure that can be established by the biasing member is less than an overpressure protection trigger force, which can be provided under an overpressure of approximately 350 to 400 bar in the mold assembly feed line.

5. The spinning pack (10) according to at least one of the preceding claims, characterized in that The overpressure protection device (21) is formed by the interaction of the mounting adapter (11), which is movably mounted in the screw sleeve (12) and is biasedly positioned on the melt distribution element (16) by the biasing element (13).

6. The spinning pack (10) according to at least one of the preceding claims, characterized in that The spin pack has a displacement mechanism which is mounted upstream of the filter medium in the tank housing (15).

7. The spinning pack (10) according to at least one of the preceding claims, characterized in that The tank housing (15) is mounted on a threaded sleeve (29) in a positionally fixed manner by means of a tank mounting portion (28) of the tank housing in the form of a threaded portion, wherein the threaded sleeve is mounted between the tank mounting portion (28) and the melt distributor (16).

8. The spinning pack (10) according to at least one of the preceding claims, characterized in that The biasing element comprises an elastically deformable material, wherein the biasing element comprises in particular a helical spring, a coil spring, a helical coil spring and / or a wave spring.

9. Spinning pack (10) according to at least one of the preceding claims, characterized in that The spinning assembly comprises a first displacement mechanism (17.1) and a second displacement mechanism (17.2), a first filter medium (19.1) and a second filter medium (19.2), and a first capillary section (26.1) and a second capillary section (26.2) in a template (20), which are arranged adjacent to each other to form a first filament bundle (FF1) and a second filament bundle (FF2).

10. A device for producing synthetic yarn (F), comprising a melt spinning device (1) for extruding the synthetic yarn from a plastic melt and a winding device for drawing off, conveying and winding the yarn extruded by the melt spinning device, wherein: The melt-spinning device comprises a spin pack with an overvoltage protection device (21) according to at least one of the preceding claims 1 to 9.

11. The device according to claim 10, characterized in that The melt-spinning device comprises a heating box (30), in which the spinning assembly (10) is partially installed, wherein a feed line (46.1, 46.2) installed in the heating box is movably connected to the spinning assembly (10), in particular the melt feed channel (22.1, 22.2), at a fluid-tight distance, as a result of which the overpressure protection device has a triggering area.

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