Spinneret assembly for extruding synthetic filaments

Abstract

The invention relates to a spinneret assembly (1) for extruding a synthetic filament (F), comprising a housing (2) in which a spinneret plate (4), a distributor (6) and a pressing plate (8) are mounted, the distributor (6) having at least two parts (60, 61) which can be separated from each other and assembled to each other. The invention also relates to a melt spinning device comprising the spinneret assembly (1).

Description

Technical Field

[0001] The present invention relates to a spinneret assembly for extruding synthetic filaments and a melt spinning device comprising the spinneret assembly. Background Art

[0002] When producing synthetic filaments, spinneret packs are used, with which a plastic melt can be extruded into a plurality of individual filaments. The spinneret pack is a melt spinning device comprising a spinning manifold in which the spinneret pack is mounted and receives the plastic melt, for example, by feeding it via an extruder.

[0003] The extruded monofilaments can be combined into synthetic filaments and can be collected with the aid of a winding device to form a package.

[0004] WO2015104259A1 discloses a spinneret assembly for melt-spinning a large number of monofilaments composed of a polymer melt. To this end, the spinneret assembly comprises: a housing for accommodating a spinneret having a plurality of spinneret holes; an inlet adapter having at least one melt inlet; and a filter device arranged between the inlet adapter and the spinneret, the filter device comprising a plurality of filter elements arranged in series.

[0005] The spinneret assembly includes a melt distributor, which is designed to feed the plastic melt to the spinneret. When the spinneret assembly is to be used to produce another type of monofilament, in addition to the spinneret, the melt distributor must also be replaced.

[0006] The distributor is the largest component in the spinneret assembly. Compared with other components, the distributor is relatively bulky and takes up a lot of storage space. Summary of the Invention

[0007] It is therefore an object of the present invention to provide a spinneret assembly having a distributor which is easy to handle and has a low space requirement.

[0008] Another object of the present invention is to provide a melt spinning device with which the above-mentioned problems can be prevented or at least alleviated.

[0009] According to the invention, this object is achieved with regard to a spinneret package by a spinneret package having the features according to claim 1 .

[0010] One aspect of the present invention provides a spinneret assembly for extruding synthetic filaments, which includes a housing, a spinneret for extruding a melt, a distributor for distributing the melt to the spinneret, and an inlet adapter for allowing the melt to enter the distributor, which are assembled in the housing, and the distributor has at least two parts, which are separable from each other and can be assembled with each other.

[0011] The dispenser is formed from two parts that can be assembled together, so that the dispenser can be adapted to the monofilament to be produced. This has the advantage that less storage space is required and less material is needed to produce the dispenser. Since the two parts can be moved independently of each other, transportability is also improved.

[0012] Further advantages and exemplary embodiments can be derived from the dependent claims.

[0013] According to a preferred development, the first component is designed according to a dispenser head of a dispenser.

[0014] The first component is a replaceable / exchangeable assembly. Depending on the monofilament to be produced, different distribution heads are provided. The distribution head is used to evenly distribute the melt in the spinneret assembly and transfer it to the spinneret plate.

[0015] According to another preferred development, the second component is designed as an assembly body, to which the dispensing head can be assembled to form the dispenser.

[0016] The assembly can be combined with dispensing heads of different designs so that only the dispensing head has to be selected. In this way, for example, storage space can be saved.

[0017] According to a particularly preferred improvement, the distribution head has a plurality of distribution grooves on its periphery for supplying a certain amount of melt to the spinneret and for limiting the amount of melt, and / or the periphery of the wall of the assembly has a plurality of wall grooves for guiding the melt to the spinneret.

[0018] The dispensing head and the assembly are formed on the dispensing section like a conventional dispenser. This has the advantage that the same yarn quality can be provided.

[0019] According to a preferred improvement, the cross-sectional shape, number and / or design of the plurality of distribution grooves can be adapted to the monofilament product that can be produced, wherein a suitable / matching distribution head having a suitable cross-sectional shape of the distribution grooves, number of distribution grooves and / or design of the plurality of distribution grooves can be combined with the assembly.

[0020] Thus, the dispenser can be adapted to the monofilament to be produced, while the assembly can remain identical. This has the advantage that less storage space must be provided.

[0021] According to a particularly preferred development, the dispenser head can be screwed / threaded, locked and / or clamped in a detachable manner by means of the mounting body.

[0022] Different assembly variants are available for assembling the dispensing head to the assembly.

[0023] According to a further preferred improvement, the dispensing head and / or the assembly body are formed with an internal thread and / or an external thread for screwing the dispensing head onto the assembly body.

[0024] Internal and external threads may be formed on the dispenser head and / or the fitting body.

[0025] According to a preferred development, a plug-and-screw coupling / rotary snap-on coupling is formed on the mounting body and the dispenser head for locking the dispenser head to the mounting body.

[0026] A plug-in coupling is also conceivable for connecting the dispenser head and the assembly. A plug-in coupling or plug-in closure is a quickly releasable mechanical connection. The dispenser head and the assembly are connected by inserting one into the other and twisting them in opposite directions, and can also be disconnected again in this way.

[0027] According to a particularly preferred development, a screw is provided for clamping the dispenser head to the mounting body, the screw cooperating with a threaded groove in the dispenser head and interacting via a screw receptacle relative to the mounting body.

[0028] Additionally or as an alternative, the dispensing head and the assembly body can also be connected to each other using bolts. The dispensing head and the assembly body can be particularly clamped using the bolts.

[0029] In summary, the dispenser according to the present invention has the following advantages:

[0030] The dispenser can be used for various filament products. According to the present invention, the dispenser essentially consists of two parts: a base body and a replaceable dispensing head. The dispensing head can be screwed to the base body, for example, via external and internal threads, can be clamped, for example, by screws, and / or can be locked, for example, via a plug-in connection.

[0031] The distribution head has distribution grooves on its outer periphery. The size and number of the distribution grooves determine the throughput of the melt and thus determine the monofilament products that can be produced.

[0032] Each distribution head is designed for a specific monofilament product. Only the distribution head, not the entire distributor of the spinneret assembly, has to be replaced.

[0033] According to the invention, this object is achieved with respect to a melt-spinning device by a melt-spinning device having the features according to claim 10 .

[0034] One aspect of the present invention provides a melt spinning device for producing synthetic filaments, comprising a spinneret assembly according to at least one of the aforementioned improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The spinneret assembly according to the present invention will be explained in more detail below using several exemplary embodiments of the spinneret assembly according to the present invention with reference to the accompanying drawings,

[0036] in:

[0037] Figure 1 Schematically shows a cross-sectional view of an embodiment of a spinneret assembly comprising a distributor according to the invention in an assembled state,

[0038] Figure 2 shows schematically a cross-sectional view of a first embodiment of a dispenser according to the invention in an assembled state,

[0039] Figure 3 shows schematically a cross-sectional view of a second embodiment of a dispenser according to the invention in an assembled state,

[0040] Figure 4 Schematically shows a plan view of a dispensing head of a dispenser,

[0041] Figure 5 A detailed view of the dispensing slot on the dispensing head is shown.

[0042] Figure 6 A perspective view of the dispenser is shown in the assembled state.

[0043] List of reference numerals:

[0044] 1 Spinneret assembly

[0045] 2 Housing

[0046] 3 Assembly threads

[0047] 4 Spinneret

[0048] 6 Distributor

[0049] 8 Inlet adapter

[0050] 9 Spacer spring system

[0051] 10 Assembly cylinder

[0052] 11 Fixing bracket

[0053] 14 Filters

[0054] 16 filter tube

[0055] 17 Melt channel

[0056] 18 Melt Distribution System

[0057] 40 capillaries

[0058] 41 holes

[0059] 60 First Part

[0060] 61 Second Part

[0061] 62 distribution head

[0062] 63 Assembly

[0063] 64 allocation slots

[0064] 65 Wall Groove

[0065] 66 Distribution protrusion

[0066] 67 Distribution Channel

[0067] 68 distribution step

[0068] 69 Threaded devices, connectors

[0069] 70 bolts

[0070] 71 threaded seat

[0071] 72 Bolt receiving portion

[0072] 73 threaded portion

[0073] 74 Rod

[0074] 75 bolt head

[0075] 76 through holes

[0076] 80 connecting sleeve

[0077] 81 Through Channel

[0078] F Monofilament extrusion direction DETAILED DESCRIPTION

[0079] Figure 1 Schematically depicts a cross-section through an exemplary embodiment of a spinneret pack 1 comprising a distributor according to the invention in assembled state. F denotes the direction of filament extrusion.

[0080] Figure 1 The spinneret assembly 1 shown in FIG has a housing 2. In the substantially cylindrical housing 2 are mounted: a spinneret 4 with a mounting barrel 10; a filter tube 16, adjacent to which is a filter 14; and a distributor 6, which is kept spaced apart from the inlet adapter 8 by a spacer spring system 9. The mounting barrel 10 has a holding bracket 11 on its inner side, which serves to hold components inserted into the mounting barrel 10.

[0081] In order to protect the inlet adapter 8 when it is assembled into the spinneret housing 10 , a connecting sleeve 80 is provided at the opening of the inlet adapter 8 .

[0082] For assembling the spinneret assembly 1 , an assembly thread 3 is formed on the inner side of the spinneret assembly 1 on the melt feed side, which assembly thread is designed to complement a corresponding assembly thread in a melt spinning device or a spinning shell for feeding the plastic melt.

[0083] Inlet adapter 8 in Figure 1 Shown as a cone.

[0084] Other configurations can also be used for this purpose. It is important here that the inlet adapter 8 has a through-channel 81 , so that the plastic melt can be guided to the spinneret 4 in the longitudinal direction of the housing 2 .

[0085] As mentioned above, the access opening of the inlet adapter 8 is provided with a connecting sleeve 80 so that the spinneret assembly 1 can be mounted in a protected manner in the spinneret housing.

[0086] The spring-elastic spacer spring system 9 adjoins the inlet adapter 8 and is mounted before the inlet adapter 8 is mounted in a mounting position remote from the distributor 6 , which is described in greater detail below.

[0087] In this assembled position, the spacer arms of the spacer spring system 9 protrude from the distributor surface of the distributor 6 , so that the melt channel 17 can be arranged between the inlet adapter 8 and the distributor 6 .

[0088] The distributor 6 of the present invention is inserted into the mounting barrel 10. The distributor 6 of the present invention is mounted in the mounting barrel 10 together with the filter 14 and the associated filter tube 16. The mounting barrel 10 has a substantially flat outer surface on the side facing the housing 1 and a stepped surface on the opposite side, so that the mounting barrel 10 can hold the distributor 6 of the present invention together with the filter tube 16 mounted thereon and the filter 14 adjacent to the filter tube in a predetermined position, and additionally defines a melt channel 17 for supplying melt.

[0089] Adjacent downstream of the distributor 6 and the assembly cylinder 10 is a spinneret 4 which has a plurality of capillaries 40 which are connected in a fluid-tight manner to holes 41 in the spinneret 4 .

[0090] For better understanding, Figure 1 The plurality of capillaries 40 are not shown, but only a portion thereof is shown.

[0091] The melt collected in the melt distribution system 18 can be directed to the capillary 40 via a hole 41 adjacent to the capillary 40 .

[0092] The melt distribution system 18 is a gap which is defined at one end by the distributor 6 and at the other end by the spinneret 4 .

[0093] Figure 2A first embodiment of a dispenser 6 according to the invention is shown without Figure 1 Other components of the spinneret assembly 1.

[0094] The distributor 6 according to the invention comprises a first part 60 and a second part 61 which can be assembled and separated from one another and which, in the assembled state, form a distributor 6 which can be used in a spinneret assembly 1 .

[0095] The first component 60 is a distribution head 62 , with which the melt fed via the through-opening can first be fed to the filter 16 and then to the spinneret 4 and distributed.

[0096] Depending on the monofilament or monofilament product to be formed, different shapes of the distribution head 62 can be used. For this purpose, the distribution head 62 has a correspondingly designed distribution protrusion 66, a distribution channel 67 positioned adjacent to the distribution protrusion, and a distribution groove 64 arranged on the outer circumference of the distribution head, so that the corresponding amount can be supplied to the spinneret 4 via the distributor 6 in a precise amount.

[0097] exist Figure 2 In the exemplary embodiment of the dispenser 6 shown, the dispenser head 62 is coupled to the assembly body 63 via a coupling 69 in the form of a screw thread arrangement in such a way that they can be detachably assembled to each other.

[0098] The assembly body 63 has corresponding couplings 69 , here in the form of internal and external thread arrangements, so that the dispensing head 62 of the dispenser 6 can be combined with the assembly body 63 in a detachable manner and assembled thereto.

[0099] The distribution head 62 can be assembled to the assembly 63 in a fluid-tight manner, so that plastic melt supplied to the filter cannot enter at the channels formed by the assembly.

[0100] Furthermore, the distribution head 62 has a stepped distribution groove 64 , and the mounting body 63 has corresponding wall grooves 65 on its outer circumference for guiding the plastic melt to the spinneret 4 .

[0101] Figure 3 A second embodiment of a dispenser is shown, in which, in order to detachably mount the dispense head 62 on the assembly body 63, the dispense head 62 has a threaded seat 71 in which a threaded portion 73 of a bolt 70 can be mounted, and the bolt can be inserted via a through hole 76 that continuously passes through the assembly body 63 and mounted in the assembly body.

[0102] The bolt 70 has a bolt head 75 on the side opposite to the threaded portion 73, which is larger than the shank 74 of the bolt 70. In order to accommodate the bolt head 75, the assembly 63 has a bolt receiving portion 72, in which the bolt head can be completely sunk into the assembly 63 in the assembled state. Figure 3 shown.

[0103] Figure 4 A plan view of the dispensing head 62 of the dispenser 6 is shown, in particular a plan view of the dispensing channel 67 and the dispensing groove 64 on the outer circumference of the dispensing head 62 which is spaced apart from the dispensing channel, the dispensing channel extending radially to the outer circumference of the dispensing head and being arranged adjacent to the dispensing protrusion 66.

[0104] The distribution groove 64 is provided with a distribution step 68 so that the plastic melt can be supplied more accurately.

[0105] exist Figure 5 In detail view V of FIG. 1 , the distribution trough 64 with the distribution step 68 is shown on a larger scale.

[0106] Figure 6 A perspective view of a dispenser 6 comprising a dispensing head 62 and a fitting body 63 in an assembled state is shown. Figure 6 The distributor 6 is shown in the assembled state and how it can be installed in the spinneret assembly 1 .

[0107] The number, design and shape of the dispensing grooves 64 on the dispensing head 62 and the position and design of the dispensing protrusions 66 can be appropriately selected depending on the monofilament to be produced by the corresponding dispensing head 62, so that the same assembly 63 can be combined with different dispensing heads 62, thereby requiring less material and lower cost to manufacture the dispenser 6.

[0108] In an exemplary embodiment (not shown), the dispensing head 62 and the assembly body 63 may have a plug-and-twist closure (not shown). The plug-and-twist closure is a quick-release mechanical connection. The dispensing head 62 and the assembly body 63 are connected by inserting one into the other and rotating in opposite directions, and can also be separated again in this way.

Claims

1. A spinneret assembly (1) for extruding synthetic filaments (F), comprising a housing (2) in which a spinneret (4) for extruding a melt, a distributor (6) for distributing the melt to the spinneret, and an inlet adapter (8) for allowing the melt to enter the distributor (6) are mounted, wherein: The dispenser (6) has at least two parts (60, 61) which can be separated from each other and assembled with each other.

2. The spinneret assembly according to claim 1, wherein The first component (60) is designed according to the dispensing head (62) of the dispenser (6).

3. The spinneret assembly according to at least one of the preceding claims, characterized in that The second component is designed according to an assembly body (63), with which the dispensing head (62) can be assembled to form the dispenser (6).

4. Spinneret assembly according to at least one of the preceding claims, characterized in that The distribution head (62) has a plurality of distribution grooves (64) on its periphery, the distribution grooves are used to supply a certain amount of melt to the spinneret and to limit the amount of melt supplied to the spinneret, and / or the periphery of the wall of the assembly (63) has a plurality of wall grooves, the wall grooves are used to guide the melt to the spinneret.

5. Spinneret assembly according to at least one of the preceding claims, characterized in that The cross-sectional shape, number and / or design of the plurality of dispensing grooves can be adapted to the monofilament product that can be produced, wherein a suitable dispensing head having a suitable cross-sectional shape of the dispensing grooves, number of dispensing grooves and / or design of the plurality of dispensing grooves can be combined with the assembly.

6. Spinneret assembly according to at least one of the preceding claims, characterized in that The dispensing head and the assembly body can be screwed, locked and / or clamped to each other in a releasable manner.

7. Spinneret assembly according to at least one of the preceding claims, characterized in that In order to screw the dispensing head onto the assembly body, the dispensing head and / or the assembly body are formed with internal threads and / or external threads.

8. Spinneret assembly according to at least one of the preceding claims, characterized in that In order to lock the dispensing head on the mounting body, plug-and-screw couplings are formed on the mounting body and the dispensing head.

9. Spinneret assembly according to at least one of the preceding claims, characterized in that In order to clamp the dispensing head on the mounting body, a screw (70) is provided, which cooperates with a threaded groove (71) in the dispensing head and with the mounting body via a screw receptacle (72).

10. A melt spinning device for producing synthetic filaments, comprising a spinneret pack according to at least one of the preceding claims 1 to 9.

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