DE102008057617A1 - Compressor unit and pressure roller unit for a drafting system of a textile machine - Google Patents

Abstract

For a drafting of a textile machine, a compressor unit is provided, which contains at least one compression channel for a finished distorted fiber structure. The compressor unit is designed in several parts. It contains a holder and at least one wear-resistant component, which is immovably connected to the holder. Furthermore, a wear-resistant component for such a compressor unit, a method for producing a compressor unit and a pressure roller assembly with such a compressor unit are described.

Description

The The invention relates to a compressor unit for a drafting system a textile machine, with at least one compression channel for a finished warped fiber strand. The invention also relates a wear-resistant component for immovable attachment in a compressor unit for a drafting system of a textile machine and a method of manufacturing a compressor unit for a drafting system of a textile machine.

The The invention further relates to a printing roll unit for a Drafting a textile machine with a compressor unit, a Base body and two pressure roller twins, which in the Basic body are added.

A pressure roller assembly and a compressor unit of the type mentioned are from the WO 2006/005207 A1 known. The known compressor unit is formed in one piece and consists of a relatively large and complex ceramic part. The compressor unit includes a support surface for a lower roller of the drafting system. The compressor unit is arranged freely movable between two pressure rollers and is positioned on its support surface on the lower roller. In the circumferential direction of the lower roller, the compressor unit is positioned over a stop fixedly mounted on a pressure roller assembly. Due to its shape, the compressor unit is held captive between the two top rollers of the pressure roller twin, so that the compressor unit can not fall out and be lost when the pressure roller unit is lifted off the bottom roller. However, the compressor unit has no connection to the printing roll unit and can move freely with respect to the printing roll unit. The compressor unit projects beyond the covers of the upper rollers in the axial direction and has in these areas an enlarged circumferential surface of the lower roller support surface. A precise production of the complex ceramic part is very expensive, since in particular the relatively large bearing surface must be completely reground to ensure a good support on the lower roller.

From the CN 2734787 Y a compressor unit is known which consists of several individual parts. There are two compressor components with compression channels for finished warped fiber composites. The two compressor components are movably arranged on a shaft which extends over two adjacent drafting systems. The shaft is suspended from the load carrier of the drafting system. The compressor components have a support surface for a lower roller of the drafting system. In the compressor components magnets are arranged, which pull the compressor component against the lower roller and bring the bearing surface of the compressor component with the lower roller in contact. When placing the compressor unit on the lower roller, the two compressor components each align by their contact surface on the lower roller.

Of the Invention is based on the object, an improved compressor unit and to provide an improved printing roll unit.

The Task is solved in that the compressor unit is formed in several parts and a holder and at least one wear-resistant Contains component that is immovably connected to the holder.

At the Pressure roller unit, the object is achieved in that the pressure roller assembly at least one means for securing the Compressor unit on the printing roll unit, wherein the compressor unit movably mounted on the printing roll unit. The connecting means provide a force transmitting connection between the Compressor unit and the pressure roller unit forth. The connecting means cause a defined mobility of the compressor unit.

A multi-part compressor unit has the advantage that the wear-resistant Component can be made very small. The outer contour the wear-resistant component can be significantly simplified. The wear-resistant component is thereby easier to manufacture. Due to the multiparty can in different areas of the Compressor unit a material advantageous for the function to get voted. In different areas with different Functions can each be optimally suited for the function Material to be selected. The compressor unit is provided at the points with a wear-resistant component, which are subject to increased wear, for example because they come into contact with the fiber structure. By the immovable connection of a wear-resistant component with the holder, a compressor unit is created, which is a high precision. A manufactured with sufficient accuracy Compressor unit can no longer lose its accuracy.

The Compressor unit is understood literally that the "unit" by An assembly can be formed, consisting of several individual parts exists, and their items are permanently connected are. However, the items do not necessarily have to be immobile be connected with each other and can also be disassembled be. The "unit" is self-employed tradable item.

It becomes an independent protection for a ver wear-resistant component claimed for immovable attachment in a compressor unit for a drafting of a textile machine. A wear-resistant component is an independently tradeable object that is necessary for the completion of a multi-part compressor unit. The wear-resistant component has a bearing surface for a drafting roller. A wear-resistant component for a compression zone of the drafting system contains a compression channel for a completely distorted fiber structure. A wear-resistant component for a main draft zone of the drafting system contains at least one guide surface for a fiber structure processed in the main drafting zone of the drafting system. In addition, the wear-resistant component has at least one receptacle for an element of the compressor unit. A wear-resistant component of this embodiment is very well adapted to the tasks to be fulfilled and yet easy to produce. The use of a wear-resistant material can be limited to those areas of the compressor unit that absolutely require wear protection. As a wear-resistant material, different materials are suitable. The wear-resistant component preferably consists of a hard metal, of ceramic or of a wear-resistant plastic, which may contain hard and / or wear-reducing additives.

One Compression channel in the wear-resistant component is preferred arranged tunnel-shaped in the region of the support surface and formed open to the support surface. A wear-resistant Component with compression channel can also be referred to as a "compaction component" become. A baffle of the compression channel is immediately adjacent to the support surface. The tunnel-shaped compression channel becomes first through the peripheral surface of the drafting roller to a closed channel. This has the advantage that the peripheral surface the drafting roller as a transport element for the fiber structure serves in the compression zone. The support surface for the drafting roller is concave, with the curvature adapted to the peripheral surface of a cylinder. Of the Term cylinder denotes a geometric base. The diameter of the cylinder to which the curvature of the support surface is adapted, advantageously corresponds very precisely to the outer diameter the drafting roller, so that the wear-resistant component and the compressor unit in the operating state very accurately on the Traction roller be positioned and the tunnel-shaped Compression channel very good to the peripheral surface of the drafting roller is sealed.

by virtue of the immovable attachment of the wear-resistant component on the holder of the compressor unit, the support surface be made very small. The holder is a component of the compressor unit and may also be referred to as "body of the compressor unit" become. On the holder are one or more wear-resistant Components immovably mounted. The holder takes over one Part of the positioning of the compression channel, leaving the support surface not only the positioning must ensure. The Pad can be characterized in particular Decrease greatly in the circumferential direction of the drafting roller, so that the production of the wear-resistant component is simplified. Preferably, the arc length of the support surface - in each section seen perpendicular to the center line of the cylinder - smaller than 14 mm, advantageously less than 10 mm and particularly advantageous even smaller than 8 mm. The smaller the arc length of the support surface is, the less is the manufacturing inaccuracy of one - for example made of ceramic - wear-resistant component. A usually necessary blending the Support surface is thereby simplified in any case and can with sufficient accuracy of the wear-resistant component even completely omitted.

at the manufacture of a compressor unit becomes a wear-resistant Component immovably connected to a holder. For the immovable connection of the wear-resistant component with the holder different approaches are advantageous. It may be advantageous that a press connection between the holder and a wear-resistant component is present. A non-positive press connection has the advantage that the immovable connection immediately after the pressing process is fully loaded. In particular, when the holder is designed as an injection molded part, can It may be advantageous for a portion of a wear resistant Component is encapsulated by the material of the holder. Especially Advantageously, the wear-resistant component is cohesively connected to the holder. A cohesive connection leaves preferably produced by soldering or by gluing. A wear-resistant component can in the still soft material of the holder, an adhesive or a solder can be embedded and is fixed immovably by curing.

In an advantageous embodiment, the wear-resistant component has a receptacle for a protruding from the holder of the compressor unit pin, in particular for a substantially cylindrical pin. The receptacle can preferably be formed by a blind hole. Such a receptacle for an element of the compressor unit has the advantage that the wear-resistant component can be very easily pushed onto the holder of the compressor unit and fixed there - for example by gluing. In order to ensure a high stability of the pin protruding from the compressor unit, the blind hole has a diameter of more than 2 mm, in particular more than 3 mm, at least in one region. For ease of manufacture, the blind hole may be conical and rejuvenate to its base. Preferably, the center line of the blind hole extends parallel to the center line of the curved bearing surface. It is advantageous that the compression channel in the wear-resistant component - seen in a section along the center line of the blind hole - extends below the base of the blind hole. Thus, a large diameter of the blind hole in a small wear-resistant component can accommodate.

According to one advantageous embodiment is a compressor unit provided in which a wear-resistant component projecting is arranged on the holder of the compressor unit. Cantilever means that the wear-resistant component only on one side of the holder is attached. Cantilever also means that the attachment of the Holder on a pressure roller assembly only on one side the compression channel is located. A cantilevered arrangement of wear-resistant component on the holder is in particular then given when the wear-resistant component a recording for a protruding from the holder pin, the midline of the recording being parallel to the midline of the arched bearing surface of the wear-resistant Component runs.

to Attaching a wear-resistant component to a compressor unit it is provided that the holder has a receptacle for a wear-resistant component having. Preferably, the receptacle for the wear-resistant Component by a pin, in particular a substantially cylindrical Spigot formed, which protrudes from the holder.

In Advantageous embodiment of the invention is provided that the Compressor unit at least two wear-resistant components contains, which are immovably connected to the holder. The wear-resistant components can be arranged at different locations of the compressor unit and fulfill different functions. For example, you can two wear-resistant components, each with a support surface be provided for a drafting roller. Especially if two wear-resistant components are arranged on the holder, that the two bearing surfaces in the circumferential direction of the drafting roller Seen from each other, the compressor unit can be better and more stable position on the drafting roller. It is advantageous that the distance - in the circumferential direction of Drafting roller seen - between the bearing surfaces the two wear-resistant components about 7 mm to 22 mm, especially 7.5 mm to 15 mm.

It is also advantageous to make the compressor unit so that she next to a compression channel for a finished warped Fiber Association still another guide surface for a fiber structure. Is preferred a guide surface for a fiber structure provided in the main drafting zone of the drafting system. The guide surface is - seen in the transport direction of the fiber strand - upstream arranged the compression channel. The guide surface for the fiber structure may have a convex guide surface be that for deflecting the fiber structure from the stretching field plane can be used. The guide surface can also be funnel-shaped be designed to compact the fiber strand in the main draft zone. For such a configuration, it is advantageous that a first wear-resistant component at least one guide surface for a fiber composite, and that includes a second wear-resistant component at least one compression channel for contains a finished distorted fiber structure.

It may be advantageous that the compressor unit two wear-resistant Components each with a support surface for a Contains drafting roller and for two adjacent Drawframes can be used, the wear-resistant Components are arranged on the holder, that the two bearing surfaces Seen in the axial direction of the drafting roller spaced from each other are. Two spaced in the axial direction of the drafting roller bearing surfaces establish a particularly good and stable positioning the compressor unit on the drafting roller.

Of course can be spaced in the circumferential direction and in the axial direction of the drafting roller Contact surfaces also combined on a compressor unit become. The compressor unit then contains three or four Wear-resistant components, each with a support surface for the drafting roller.

at a compressor unit for two adjacent drafting systems it is advantageous that the wear-resistant component two Recordings for one from a holder of the compressor unit has outstanding pin, so that the wear-resistant Component can be used for both drafting systems. A wear-resistant Component is through its two shots on both sides of the holder mountable, so that the variety of parts of the wear-resistant Reduce components. Preferably are the two shots - especially in a section along the center line of the support surface seen - on opposite sides of the compression channel or the guide surface.

To enhance the stability of the compressor unit, it may be advantageous for the holder to comprise a continuous rod, for example made of steel and preferably cylindrical, which extends between two adjacent drafting systems associated wear-resistant components and whose ends protrude into the wear-resistant components. To ensure sufficient stability, the At least in one region, have a diameter of 2 mm or more, in particular of 3 mm or more. The ends of the rod protrude as a pin out of the holder and each form a receptacle for a wear-resistant component.

In Another embodiment of the invention, it is advantageous that the Compressor unit at least one stop surface for positioning the compressor unit in the circumferential direction one with the support surface Having brought in contact drafting roller. The stop surface for positioning in the circumferential direction causes the compressor unit not is taken by the rotation of the drafting roller. Especially the compression channel becomes precise due to the stop surface positioned with respect to the nip lines of the pressure rollers.

Around a safe system of the compressor unit on the drafting roller to ensure is advantageously at least one Receiving for a loading element for generating a bearing force provided the bearing surfaces. One in the pressure roller aggregate included loading element contacts the compressor unit in the field of recording and transmits its loading power on the compressor unit. It may also be advantageous for the compressor unit a loading element for generating a bearing force on the bearing surfaces contains, or that a loading element on the compressor unit is attached. Such an embodiment has the advantage the loading element with the compressor unit is an assembly forms, which can be used in a printing roll unit and also easily is interchangeable. The strength of the loading element can thereby adapted to the requirements of the compressor unit. The loading element may preferably be a spring, in particular a leaf spring, which attached to the holder. Preferably, the spring is over a Joint attached to the holder. Another advantageous loading element is a magnet. The recording for the load element or the loading element itself is preferably on the holder of the compressor unit arranged. This is another advantage of the multi-part design the compressor unit, since the loading elements for generating the Bearing force no longer directly on the wear-resistant Component must be arranged.

In Embodiment of the invention can be provided that the compressor unit at least one guide surface for a Yarn has. A guide surface for a yarn can wear out an elastic cover at the top of the compression zone limiting upper roll.

at the production of a compressor unit with at least two wear-resistant Components, a method is advantageously used, in the at least two wear-resistant components to each other be aligned and in the aligned state with a holder be connected, so that the wear-resistant components immovably fixed to the holder. Aligning the wear-resistant Components are preferably done by placing the compressor unit on a convex and the peripheral surface a cylinder adapted surface. The diameter The cylinder corresponds as exactly as possible to the diameter the drafting roller for which the compressor unit later should be used. Aligning the wear-resistant Components is facilitated if at least one wear-resistant Component a concavely curved support surface for a drafting roller, wherein the curvature of the support surface adapted to the peripheral surface of the cylinder, so that the Support surface the wear-resistant component when placing on the convex arched surface aligns.

The Fixing the wear-resistant components on the holder can thereby happen that the wear-resistant components in a mold be inserted and partially encapsulated with the material of the holder. The convex curved surface to align the wear-resistant Components is arranged in the region of the injection mold, so that the wear-resistant components during encapsulation in exactly aligned condition.

at a particularly advantageous manufacturing process, the wear-resistant Fix the components to the holder by gluing. The holder of the compressor unit has a receptacle for each wear resistant Component on, with an adhesive applied in the area of each receptacle is the wear-resistant components on the soft adhesive put on and aligned with each other, so that the wear-resistant Components in the aligned state by the hardening Adhesive immovably fixed to the holder.

A Production of the compressor unit according to an inventive The advantage of this method is that it very easily produces a compressor unit leaves that very stable and safe on the drafting roller rests. Lifting the compressor unit from the peripheral surface the drafting roller due to vibrations occurring during operation can thereby be largely prevented. In addition, can be the post-processing on the bearing surface of the compressor unit minimize. The wear-resistant components with their contact surfaces are preferably finished before fixing to the holder, so that after fixing on the holder only a minor Post-processing on the bearing surfaces for the Drafting roller is required. Preference is no further Post-processing made more.

An inventive printing roll unit in which the compressor unit with a connecting means is movably mounted on the printing roll unit, has the advantage that the compressor unit is not lost even when lifting the pressure roller assembly of the drafting roller and can only move controlled. In contrast to that from the WO 2006/005207 A1 Known printing roll unit can now perform the compressor unit due to the connecting means no uncontrolled movements between the pressure rollers more. The mobility is defined by the means for fixing the compressor unit. A connecting means is designed such that in at least one direction a force can be transmitted from the pressure roller assembly to the compressor unit. Depending on the embodiment, the connecting means can be attached to the main body and / or to an axis of a pressure roller twin.

The Both pressure roller twins are so on a body arranged that the top rollers of the pressure roller twins do not Touch and that the pressure roller assembly on a drafting roller can be placed. Both pressure roller twins arrive at touchdown on the lower roller of the drafting system with the peripheral surface the lower roller in contact, so that the upper rollers of the pressure roller assembly with the common lower roller two consecutive clamping lines between which the compression zone is located. The compression channel the compressor unit is arranged on the pressure roller assembly so that the compression channel for the finished warped Fiber strand is located in the compression zone. The pressure roller twins are so absorbed in the body that the peripheral surface the drafting roller which can be brought into contact with the pressure roller twins a transport element for the finished warped fiber structure forms in the compression zone.

Prefers the axes of the pressure roller twins are immobile in the body taken the pressure roller assembly. The two pressure roller twins thereby can not change their position to each other, so that the pressure roller assembly when placed on the drafting roller align so that the axes of the top rollers and the bottom roller run parallel.

The movably arranged in the printing roll unit compressor unit directed when placing the pressure roller assembly on the drafting roller sub-roller also on the peripheral surface of the drafting roller. Preferably, the main body of the printing roll unit at least one stop for positioning the compressor unit in the circumferential direction of a be brought into contact with the pressure rollers in contact Drafting roller on. In addition, it may be advantageous the attachment of the printing roll unit to a load carrier the drafting system so that the pressure roller assembly a compensating pivotal movement about an imaginary axis perpendicular to the stretching field plane and parallel to an imaginary axis can perform to the transport direction of the fiber structure. Preferably, the clamping line at the end of the drafting zone forming Rolling twin on its axis movable on the load carrier appropriate.

The arranged in the printing roll unit compressor unit can be different be designed. The compressor unit may preferably be as described above be formed in several parts and a holder and at least one Wear-resistant component included. The wear-resistant Component may be movably or immovably connected to the holder. The compressor unit advantageously contains at least two, in particular three or four, bearing surfaces for a drafting roller. Preference is given to two bearing surfaces in the circumferential direction of a contact with the bearing surfaces movable drafting roller spaced from each other. The bearing surfaces for the drafting roller are called each "one" area even if they pass through one or more compression channels are "divided" into several parts. Even if the actual method of production may be different from a functional point of view provided a bearing surface, in which incorporated a tunnel-shaped compression channel is. So that the compression channel can fulfill its function, On both sides of the compression channel, part of the support surface must "remain". The two parts of the bearing surface, attached to the baffles adjoin the compression channel, form a functional unit and are therefore called "a" bearing surface designated.

It may also be advantageous, arranged in a pressure roller assembly Compressor unit comprising a first and a second support surface for positioning on a drafting roller, with the first and the second bearing surface integrally formed.

In Embodiment of the invention is provided that the means for Attaching the compressor unit on the printing roll unit a loading element for generating a bearing force on the bearing surfaces of Compressor unit contains. The loading element is preferred designed as a spring, in particular as a leaf spring. The spring can on the main body of the printing roll unit and the holder of Be mounted compressor unit, wherein between the loading element and the holder is a joint advantageous.

In one embodiment of the invention, it is provided that a connecting means as Gleitfüh is designed tion over which the compressor unit is movable in the main body of the pressure roller assembly. A sliding guide has the advantage that the compressor unit can only perform very narrowly defined movements on the pressure roller assembly. Alternatively, it may be advantageous to arrange the compressor unit pivotably in the main body of the pressure roller unit or to mount the compressor unit on an axis of a pressure roller twin, so that the compressor unit is pivotable about the axis. A pivotally movable compressor unit ensures good positioning with respect to the top rollers while maintaining a defined range of motion.

A contains advantageous embodiment of the printing roll unit a pneumatically acting loading element for generating a bearing force on the bearing surfaces of the compressor unit, in particular a pneumatic pressure pad, which preferably without compressed air connection is working.

Prefers contain the connecting means between the compressor unit and pressure roller assembly a captive, so that the compressor unit when lifting of the pressure roller assembly from the drafting roller does not fall out and can get lost. The captive is preferred by a clip or formed directly by the loading element.

Further Advantages and features of the invention will become apparent from the claims and the following description of some embodiments in the Connection with the figures. Individual characteristics of the different ones illustrated and described embodiments combine in any way, without the scope of To exceed invention.

It demonstrate:

1 a sectional side view and enlarged on a partially illustrated drafting of a textile machine with a pressure roller assembly and a compressor unit,

2 a view in the direction of arrow II the 1 on the compressor unit,

3 a view similar 1 to a variant of a printing roll unit and a compressor unit,

4 a view in the direction of the arrow IV the 3 on the compressor unit,

5 one along the cut surface VV of 3 sectional view of a wear-resistant component with compression channel,

6 a view similar 1 to a variant of a printing roll unit and a compressor unit,

7 a view in the direction of arrow VII of 6 on the compressor unit.

In the 1 to 7 is very schematically a drafting system 1 a textile machine shown. The drafting system 1 is designed as a double apron drafting system. The drafting system 1 is arranged on a spinning machine, preferably on a ring spinning machine. The drafting system 1 warps, in a manner known per se, a fiber structure fed in the transport direction A. 2 from staple fibers to the desired fineness. The fiber bandage 2 is warped by several in the transport direction A successively arranged pairs of rollers, which are drivable in the transport direction A with increasing peripheral speed. Of the roller pairs is only the pair of output rollers 3 . 4 represented, at the nip line 5 the delay of the fiber structure 2 finished. The roller pairs, and also the roller pair 3 . 4 , consist of a drivable lower roller 3 and a freely rotatable, to the lower roller 3 Pressable top roller 4 , The top roller 4 is provided with a cover of a rubber-elastic material and is applied to the lower roller 3 pressed down, leaving the fiber strand 2 at the nip line 5 between the drafting rollers 3 and 4 is clamped. The top rollers are in a swing-up load carrier 6 held. To the output roller pair 3 . 4 upstream roller pair are in a conventional manner Führungsriemchen 7 and 8th assigned. The guide straps 7 and 8th lead the fiber bandage 2 in the main draft zone of the drafting system 1 extending from the nip line of the guide straps, not shown 7 . 8th looped pair of rollers to the nip line 5 extends. The top roller 4 and the other upper rollers, not shown, are formed as so-called Druckwalzenzwillinge. A pair of printing rolls consists of two top rollers, the adjacent drafting systems 1 and 1' are assigned, and the one common axis 9 exhibit. In the case shown, the two top rollers of Druckwalzenzwillings 4 executed as "Loswalzen", that is, the two top rollers are freely rotatable on the non-rotating axis 9 stored. The load carrier 6 is in the middle between two adjacent drafting systems 1 and 1' arranged and holds the printing roll twin 4 on the axis 9 , The lower roller 3 is than about a variety of adjacent drafting systems 1 . 1' continuous drafting roller formed.

In a conventional drafting system 1 is the finished warped fiber strand after the nip line 5 directly in the drawing direction B a swirl member, not shown, for example, a ring spindle, fed and there is the finished yarn 10 , to Improvement of the quality of the yarn 13 , in particular to reduce the hairiness, it is provided that the finished warped fiber structure 11 following the nip line 5 through a compression zone 12 is passed, in which the fiber strand 11 compacted and compacted. The finished warped fiber strand 11 lies on the peripheral surface 13 the lower roller 3 on and is so through the compression zone 12 transported. In the compression zone 12 becomes the fiber bandage 11 through a compression channel 14 guided. The compression channel 14 is designed tunnels and the lower roller 3 open. The lower roller 3 is a second top roller 15 associated with the lower roller 3 a nip line 16 forms the compression zone 12 completed. Following the nip line 16 The compacted fiber structure becomes a yarn 10 twisted by being fed in withdrawal direction B a swirl member, not shown. The nip line 16 forms a spin stop and ensures that the fiber structure 11 in the compression zone 12 remains free of rotation.

The top rollers 15 two adjacent drafting systems 1 and 1' are also on a common axis 17 stored and form a printing roll twin. The printing roll twin 15 forms together with the printing roll twin 4 a pressure roller aggregate 18 , The printing roll unit 18 contains a basic body 19 in which the two pressure roller twins 4 . 15 on their axes 9 . 17 are included. The printing roll unit 18 forms its own structural unit, which can be exchanged on the load carrier 6 is appropriate. The pressure roller twins 4 and 15 are so in the printing roll unit 18 arranged that the top rollers of the pressure roller twins 4 and 15 do not touch each other and that the top rollers on a common drafting roller 3 can be placed. The axes 9 and 17 are advantageously as parallel as possible in the body 19 aligned. It is advantageous that the axes 9 and 17 free of play in the main body 19 are included, that is, without possibility of movement with respect to the main body 19 , The attachment of the printing roll unit 18 on the load carrier 6 is preferably such that the pressure roller assembly 18 is movable to some extent and when placed on the drafting roller 3 can align. The attachment of the pressure roller assembly 18 takes place preferably over the axis 9 , The load carrier 6 loads the pressure roll twin 4 in the middle of the axis 9 , The attachment of the printing roll unit 18 on the load carrier 6 preferably allows a pendulum movement of the printing roll unit 18 around two orthogonal imaginary axes, both perpendicular to the axis 9 stand.

The printing roll unit 18 also includes a compressor unit 20 that the compression channel 14 contains. The compressor unit 20 is in the range between the top rollers 4 and 15 arranged.

The compressor unit 20 is in the 1 to 7 illustrated in different embodiments, which will be explained in more detail below. To identify the different embodiments, the reference numeral 20 supplemented by the figure of the corresponding figure. The compressor unit of 1 and 2 receives the reference number 120 , the compacting unit of 3 to 5 the reference number 320 and the compressor unit the 6 and 7 the reference number 620 , If a compressor unit of all embodiments is meant, the reference numeral 20 otherwise, the reference number will be called the specific embodiment.

The compressor unit 20 is defined movable on the printing roll unit 18 attached, wherein at least one means 21 for securing the compressor unit 20 on the printing roll unit 18 is provided. There are different embodiments of the connecting means 21 advantageous. In any case, the funds effect 21 for attaching that compressor unit 20 not unintentionally from the printing roll unit 18 falls out and on the pressure roller assembly 18 not moved uncontrollably. The connecting means 21 allow the transmission of at least one force from the pressure roller assembly 18 on the compressor unit 20 , The means 21 to attach are on the body 19 of the printing roll unit 18 or on a part of a pressure roll twin 4 . 15 appropriate.

In the case of an existing older spinning frame with conventional drafting, it is possible, the previous output top roller 4 from the drafting system 1 to remove and against a pressure roller unit 18 exchange. It can on the load carrier 6 the recording 62 for the top roller 4 to the requirements of the printing roll unit 18 be adjusted. The existing spinning machine can be characterized on a drafting system 1 with compression zone 12 retool so that after refitting a yarn 10 can be produced with improved quality.

To the pressure of the printing roll unit 18 and in particular the upper roll 15 to the lower roller 3 to ensure a leaf spring 22 be provided. The leaf spring 122 like in the 1 and 2 shown on the load carrier 6 be attached and with their free end on the body 19 of the printing roll unit 18 to press. Another advantageous embodiment is in 3 shown. There is the leaf spring 322 at the base body 19 of the printing roll unit 18 attached and supports with its free end on the load carrier 6 from.

In addition to the compression channel 14 for the finished warped fiber structure 11 It may be advantageous to have a guide surface 23 for the fiber bandage 2 to be provided in the main draft zone. A guide surface 23 Can the quality of the warped fiber structure 11 improve. The guide surface 23 is in the transport direction A upstream of the compression channel 14 at the compressor unit 20 arranged. The guide surface 23 serves to guide the fiber structure 2 downstream of the guide straps 7 . 8th and upstream of the nip line 5 ,

In an advantageous embodiment it can be provided that the compressor unit 20 a guide surface 24 for the yarn 10 contains. The guide surface 24 is downstream of the compression channel 14 arranged and used to guide the yarn 10 following the nip line 16 , Through a guide surface 24 can the contact area of the yarn 10 with the top roller 15 be reduced, so that the wear of the cover of the top roller 15 reduced.

In the 1 and 2 is a first advantageous embodiment of a compressor unit 120 shown. The compressor unit 120 is designed in several parts. The compressor unit 120 contains a holder 25 and three wear-resistant components 141 . 142 and 143 that are immovable with the holder 25 are connected. The holder 25 practically forms a body for the compressor unit 120 on which the wear-resistant components 141 . 142 . 143 are attached. The compressor unit 120 extends over two adjacent drafting systems 1 and 1' and contains two compression channels 14 and 14 ' for the finished warped fiber bandages 11 and 11 ' the neighboring drafting systems 1 and 1' , The compressor unit 120 contains a support surface 131 for positioning the compressor unit 120 on the drafting roller 3 located in the area of the compression channel 14 is arranged. In the area of the compression channel 14 ' is a second bearing surface 132 intended. The compressor unit 120 contains a third bearing surface 133 for the drafting roller 3 in the circumferential direction C of the lower roller 3 from the support surface 131 and from the bearing surface 132 is spaced. For clarification is in 2 the circumferential direction C of the lower roller 3 and the axial direction D of the lower roller 3 indicated by a double arrow. The presentation of the 1 shows a view exactly in the axial direction D. The bearing surface 132 is from the bearing surface 131 only spaced in the axial direction D. In the circumferential direction C are the bearing surfaces 131 and 132 in the same position.

The compressor unit 120 has three spaced support surfaces 131 . 132 and 133 on that for a stable circulation of the compressor unit 120 on the lower roller 3 to care. It ensures that the compressor unit 120 even if vibrations occur safely on the lower roller 3 rests and does not tilt. In the axial direction D of the bearing surfaces 131 . 132 . 133 brought in contact drafting roller 3 seen, is the third bearing surface 133 approximately in the middle between the first bearing surface 131 and the second bearing surface 132 arranged.

The three contact surfaces 131 . 132 . 133 are each on a separate wear-resistant component 141 . 142 . 143 arranged. The compressor unit 120 is due to the wear-resistant components 141 . 142 . 143 against premature wear on the support surfaces 131 . 132 . 133 through the rotating lower roller 3 protected. The wear-resistant components 141 and 142 also each contain a compression channel 14 ,

The bearing surfaces 131 and 132 in the area of the compression channels 14 and 14 ' are curved concave, the curvature is adapted to the peripheral surface of a cylinder. This will seal the tunnel-shaped compression channel 14 to the lower roller 3 guaranteed. The bearing surface 133 is preferably flat or convex. Depending on the material of the holder can also be on the wear-resistant component in a non-illustrated embodiment 143 be waived and the third bearing surface 133 directly on the holder 25 be arranged. The lower roller 3 is in the range of drafting systems 1 and 1' usually on its outer circumference 13 provided with a corrugation. In the area between the drafting systems 1 and 1' can the lower roller 3 be smooth and executed without ribbing. If the bearing surface 133 on the non-corrugated area of the drafting roller 3 rests, is the wear on the support surface 133 lower, so that on the wear-resistant component 133 can be waived.

So that the wear-resistant components 141 . 142 . 143 Do not lose their position to each other, they are immobile with the holder 25 connected. For connection to the holder 25 has each wear-resistant component 141 . 142 . 143 a recording 45 for an element of the compressor unit 120 on. The holder 25 in turn has a recording 26 for the wear-resistant component 131 on. The pictures 26 and 45 can be coordinated so that a frictional press connection between the holder 25 and the wear-resistant component 131 is available. Will the holder 25 designed as an injection molded part, it is advantageous that a portion of the wear-resistant component 131 through the material of the holder 25 is overmoulded. The wear-resistant component can for this purpose in the injection mold of the holder 25 be inserted so that the liquid material recording 45 the wear-resistant component 131 around flows. The recording 45 can then have projections and / or profiles in a non-illustrated embodiment, to a particularly good fixation in the material of the holder 25 to ensure. The other two wear-resistant components 142 and 143 are designed analogously and in the compressor unit 120 attached.

The three wear-resistant components are preferred 141 . 142 . 143 aligned with each other and in the aligned state with the holder 25 connected. For encapsulating the wear-resistant components 141 . 142 . 143 is preferably provided that the injection mold for the holder 25 a convexly curved and the peripheral surface of a cylinder adapted surface on which the wear-resistant components can be placed. The convexly curved surface, which is adapted to the circumferential surface of a cylinder, in the injection mold simulates the drafting roller 3 and ensures that the compressor unit 120 After fixing the wear-resistant components well on the drafting roller 3 rests. Every wear-resistant component 141 . 142 . 143 has a relatively small contact surface 131 . 132 . 133 on, which can be produced with good accuracy even when producing the wear-resistant component of a very hard material without too much manufacturing effort. By aligning the wear-resistant components 141 . 142 . 143 each other can in most cases on a post-processing of the bearing surfaces 131 . 132 . 133 after fixing the wear-resistant components to the holder 25 be waived.

If but provided a post-processing of the bearing surfaces this may be minor.

The compressor unit 120 is about means 21 for attaching movable to the body 19 of the printing roll unit 18 appropriate. The means 21 for fastening included a sliding guide 50 , a loading element 27 and a captive 52 , As a load element 27 a helical compression spring is provided. The compressor unit 120 has a recording 28 for the helical compression spring 27 on. The helical compression spring 27 sits in the receptacle 28 and supports itself against the main body 19 from. The loading element 27 thereby generates a bearing force on the bearing surfaces 131 . 132 . 133 , The helical compression spring 27 is in the axial direction D in the middle between the bearing surfaces 131 and 132 arranged. To increase the contact force, the compressor unit 120 a magnet 29 contain. Is a magnet 29 provided as a loading element, depending on the application, also on the helical compression spring 27 be waived. In another advantageous embodiment, the loading element 27 pneumatically operated. Instead of the helical compression spring 27 can in the recording 28 a pressurized air cushion-shaped element (not shown) may be arranged, which generates the bearing force. The cushion-shaped element is preferably designed autonomously without compressed air supply.

The sliding guide 50 as part of the connection means 21 ensures a defined mobility of the compressor unit 120 , The compressor unit 120 contains a stop surface 51 for positioning compressor unit 120 in the circumferential direction C of the drafting roller 3 , The compressor unit 120 has the desire by the rotation of the drafting roller 3 to be taken in the circumferential direction C. The stop surface 51 defines itself defined on the main body 19 at. The stop surface 51 is in the middle between the two compression channels 14 and 14 ' arranged.

The connecting means 21 contain a clip 52 , which is a captive for the compressor unit 120 forms. The clips 52 prevents the compressor unit 120 from the sliding guide 50 slips out when the platen unit 18 from the lower roller 3 is lifted.

In an embodiment of the compressor unit 120 can be provided that the compressor unit 120 at least one guide surface 23 respectively. 23 ' for the fiber bandage 2 contains. The guide surface 23 can in the form of a cylindrical guide element, the fiber structure 2 If necessary, guide it slightly from the shortest imaginary connecting line between the exit of the guide straps 7 . 8th and the pinch line 5 deflect. The fiber bandage 2 then wraps around a part of the convex guide surface 23 , The guide surface 23 can be arranged on a wear-resistant component, which - as indicated by the dashed lines - on the holder 25 is appropriate. In an advantageous embodiment, not shown, the guide surface 23 for the fiber bandage 2 designed as a tapered guide channel, already a compression of the fiber structure 2 effected in the main draft zone.

Also indicated by dashed lines is an enlarged compressor unit 120 indicated, the additional guide surfaces 24 . 24 ' for the yarn 10 contains. The guide surfaces 24 may also be arranged on wear-resistant components that are immovable with the holder 25 are connected.

In the 3 to 5 is a second embodiment of a compressor unit 320 shown. The compressor unit 320 is for two adjacent drafting systems 1 and 1' used. The compressor unit 320 contains two compression channels 14 . 14 ' for finished warped fiber composites 11 . 11 ' , The compressor unit 320 contains a first bearing surface 331 for positioning the compressor unit 320 on a Drafting system roller 3 located in the area of the compression channel 14 is arranged.

As in 5 recognizable, is the bearing surface 331 through the compression channel 14 separated into two parts that do not touch anymore. Nevertheless, in the sense of the present patent application of only one bearing surface 331 in the area of the compression channel 14 spoken.

The compressor unit 320 has a second bearing surface 332 for the drafting roller 3 on that in the area of the compression channel 14 ' is arranged. The compressor unit 320 contains two additional bearing surfaces 333 and 334 in the circumferential direction C of the bearing surfaces 331 and 332 are spaced. The distance in the circumferential direction C is preferably 7.5 mm to 9.5 mm to a stable support of the compressor unit 320 to ensure. The first contact surface 331 is only in the axial direction D can be brought into contact with the bearing surfaces drafting roller 3 from the second bearing surface 332 spaced. The third bearing surface 333 is only in the axial direction D of the drafting roller 3 from the fourth bearing surface 334 spaced. Seen in the axial direction D, the third bearing surface 333 and the fourth bearing surface 334 about the same distance from each other as the first bearing surface 331 and the second bearing surface 332 , The compressor unit 320 contains a guide surface 23 for a fiber bandage 2 in the area of the third bearing surface 333 and a guide surface 23 ' in the area of the fourth bearing surface 334 ,

The guide surfaces 23 and 23 ' are designed as tunnel-shaped compression channels, leading to the bearing surface 333 respectively. 334 are open. The guide surfaces 23 cause a compression of the fiber structure 2 in the main draft zone of the drafting system 1 , In addition to a lateral compression of the fiber structure 2 can the guide surfaces 23 the fiber bandage 2 if necessary, deflect something out of the stretching field plane, as with the guiding surface 23 in 1 is shown. In the axial direction D of the bearing surfaces 331 . 332 . 333 . 334 brought in contact drafting roller 3 Seen, the two guide surfaces 23 . 23 ' for the fiber bandage 2 . 2 ' about the same distance to each other as the two compression channels 14 . 14 ' for the finished warped fiber structure 11 . 11 ' ,

The compressor unit 320 is designed in several parts and contains a holder 25 and four wear-resistant components 341 . 342 . 343 and 344 that are immovable with the holder 25 are connected. On every wear-resistant component 341 . 342 . 343 . 344 is a support surface 331 . 332 . 333 . 334 for positioning the compressor unit 320 on the lower roller 3 arranged. The wear-resistant components 341 and 342 have at least one compression channel 14 and 14 ' for a finished warped fiber strand 11 . 11 ' on. The wear-resistant components 341 and 342 can also be referred to as compressor components. The wear-resistant components 343 and 344 each have a guide surface 23 . 23 ' for a fiber bandage 2 . 2 ' on.

The bearing surfaces 331 . 332 . 333 and 334 are curved concave, with all the bulges are adapted to the peripheral surface of a common cylinder. "Cylinder" is understood here as a designation of a geometric base body, which in the manufacture of the compressor unit 320 the place of the drafting roller later in operation 3 occupies.

The holder 25 , which is practically a main body of the compressor unit 320 Represents a recording 26 for the wear-resistant component 341 , The recording 26 is by a pin 53 formed out of the holder 25 protrudes. The compressor unit 320 contains a pole 54 , The pole 54 is in the holder 25 used and a protruding end of the rod 54 makes the cone 53 ,

The wear-resistant component 341 has a recording 45 for the one out of the holder 25 outstanding cones 53 on. The recording 45 is formed by a blind hole. For improved shaping of the wear-resistant component 341 can the blind hole 45 slightly conical, for example, when the wear-resistant component 341 made of ceramic. The wear-resistant component 341 contains a second shot 45 ' , The recording 45 ' is also designed as a blind hole. It is located - in a section along the center line of the concave support surface 331 seen - with respect to the compression channel 14 on the opposite side like the picture 45 , Through the two shots 45 and 45 ' can that be in 5 shown wear-resistant component both as a wear-resistant component 341 as well as a wear-resistant component 342 use. The variety of parts of the wear-resistant components can be reduced thereby. Will that be in 5 shown wear-resistant component as a wear-resistant component 342 used, so it is with the recording 45 ' on the holder 25 attached. The blind hole 45 then stays empty.

To increase the stability of the compressor unit 320 is the rod 54 from the drafting system 1 through to the drafting system 1' executed. The pole 54 is preferably made of hardened steel. The pole 54 extends between two adjacent drafting systems 1 and 1' associated wear-resistant components 341 and 342 , The ends 53 the pole 54 protrude into the wear-resistant components 341 and 342 into it.

To ensure good stability of the compressor unit 320 to reach, the pole points 54 at least in a range of a diameter of 2 mm or more. Preferably, the rod has 54 a diameter of 3 mm or more. The blind hole 45 has a diameter slightly larger than the diameter of the pin 53 is. This allows the wear-resistant component 341 on the cone 53 still align. The gap between pins 53 and blind hole 45 is filled by the adhesive. The arc length of the support surface 331 - In each section perpendicular to the center line of the support surface 331 is less than 10 mm, and preferably even less than 8 mm, in order to manufacture the wear-resistant component 341 to simplify. The centerline of the bearing surface 331 corresponds to the center line of the cylinder, on the peripheral surface of the curvature of the support surface 331 is adjusted. The bearing surface 331 must be very accurate so that the tunnel-shaped compression channel 14 with his to the support surface 331 immediately adjacent baffles 46 close to the lower roller 3 rests. Because the required accuracy of the concave support surface 331 In most cases can be ensured only by a grinding process, reduces the smallest possible contact surface 331 the effort when grinding. The center line of the blind hole 45 runs parallel to the center line of the bearing surface 331 , The compression channel 14 runs - in a section along the center line of the blind hole 45 seen, so how in 5 shown - below the base 47 the blind hole 45 , At the same time the compression channel runs 14 below the base 47 ' the second blind hole 45 ' , This embodiment has the advantage that the compression channel 14 not with a blind hole 45 crosses. Due to the small arc length of the support surface 331 and the associated small outer dimensions of the wear-resistant component 341 above the support surface 331 in connection with the large diameter of the blind hole 45 can be prevented so that the compression channel 14 from a blind hole 45 is cut.

The wear-resistant components 343 and 344 are analogous to the wear-resistant component 341 designed. Instead of the compression channel 14 is a guide surface 23 intended. The compressor unit 320 contains a second pole 56 whose ends 55 - analogous to the rod 54 - Peg-shaped from the holder 25 protrude to the wear-resistant components 343 and 344 at her blind holes 45 take.

The wear-resistant components 341 . 342 . 343 . 344 are cantilevered on the holder 25 the compressor unit 320 arranged as they are only one-sided on the compressor unit 320 are attached. The holder 25 and its mounting area, so the recording 26 , lies - as in particular in 5 is recognizable - only on one side of the compression channel 14 , The along the center line of the concave support surface 331 elongated and prism-shaped wear-resistant component 341 is only on its face with the holder 25 connected. For the holder 25 This makes a preferred structural design possible, since the space on the bearing surface 331 remote longitudinal side of the wear-resistant component 341 often insufficient for attachment, which is particularly the case when the peripheral surfaces of the top roller 4 and the top roller 15 very close to each other.

Depending on the stability requirement for the compressor unit 320 It may be that the one-sided projecting, elongated wear-resistant components 341 . 342 . 343 . 344 under load, especially in the circumferential direction C, are not stable enough alone. To increase the stability of the compressor unit 320 It may be advantageous that the compressor unit 320 a dashed line (dash-two-dot line) shown stabilizing component 57 contains. The stabilizing component 57 is not with the holder 25 connected. The stabilizing component designed as a kind of "yoke" 57 connects two wear-resistant components 342 and 344 together. The stabilizing component 57 increases the stability of the cantilevered wear-resistant components 342 and 344 at increased loads in the circumferential direction C. The stabilizing component 57 may preferably be a correspondingly curved round profile. The stabilizing component 57 may preferably in the unused receptacles or blind holes 45 the wear-resistant components 342 and 344 be attached. Similarly, the wear-resistant components 341 and 343 be connected to a stabilizing component, not shown.

The compressor unit 320 is preferably prepared so that the wear-resistant components 341 . 342 . 343 and 344 prefabricated and preferably finished completely. The holder 25 with the recordings 26 for the wear-resistant components is also prefabricated. The pictures 45 on the wear-resistant components 341 . 342 . 343 . 344 are dimensionally adjusted to the shots 26 Have a game. The wear-resistant components are adhesively bonded to the holder by gluing 25 fixed. For the gluing process, an auxiliary device having a convexly curved surface adapted to the peripheral surface of a cylinder is used. The diameter of the cylinder corresponds as closely as possible to the diameter of the drafting roller 3 , There will now be an adhesive in the area of the shots 26 and / or recordings 45 applied. The wear-resistant components 341 . 342 . 343 . 344 then be on the holder 25 placed. The blind holes 45 be on the pins 53 and 55 postponed. The compressor unit 320 with the wear-resistant components that are still movable due to the soft adhesive 341 . 342 . 343 . 344 is adapted to the convex and the peripheral surface of a cylinder Surface of the auxiliary device mounted. By fitting the wear-resistant components fit 341 . 342 . 343 . 344 with their contact surfaces 331 . 332 . 333 . 334 to the cylindrical surface, which later the drafting roller 3 corresponds, and align the wear-resistant components to each other. The compressor unit 320 is held in this state until the adhesive cures and the wear-resistant components on the holder 25 fixed. When the adhesive has cured, the compressor unit is 320 in most cases ready for use. For certain applications, especially if a particularly high accuracy of the compressor unit 320 is required, it can also be provided that the bearing surfaces 331 . 332 . 333 . 334 after fixing the wear-resistant components 341 . 342 . 343 . 344 on the holder 25 Finally, be ground again to the support of the compressor unit 320 on the drafting roller 3 even further to improve.

For fastening the compressor unit 320 on the printing roll unit 18 is a lanyard 21 in the form of a leaf spring 58 intended. The leaf spring 58 is also a loading element for generating a bearing force on the bearing surfaces 331 . 332 . 333 . 334 , The leaf spring 58 is with a screw 59 at the base body 19 of the printing roll unit 18 attached. Together with the leaf spring 58 can the screw 59 also the leaf spring 322 at the base body 19 Fasten. To increase the bearing force on the support surfaces 331 . 332 . 333 . 334 can the compressor unit 320 a dashed magnet 29 contain.

The compressor unit 320 has a recording 28 for the leaf spring 58 on. The recording 28 is formed in the form of a joint, preferably by a cylindrical pin 63 is formed around the the leaf spring 58 is bent around. Through the leaf spring 58 and the joint 28 is the compressor unit 320 movable and can when putting the pressure roller assembly 18 on the lower roller 3 Align so that the bearing surfaces 331 . 332 . 333 and 334 good on the peripheral surface 13 rest. Through the around the pin of the joint 28 curved leaf spring 58 can the compressor unit 320 not from the printing roll unit 18 fall out. The captive 52 So is the load element 58 educated. Preferably, the assembly includes the compressor unit 320 the load element 58 , The leaf spring 58 So it is with the compressor unit 320 supplied and can in their loading force to the requirements of this particular compressor unit 320 be adjusted.

For positioning the compressor unit 320 in the circumferential direction C, the compressor unit 320 a stop surface 51 preferably centrally between the wear-resistant components 341 and 342 is arranged. In an embodiment, not shown, also two spaced stop surfaces 51 be provided, which is symmetrical between the two wear-resistant components 341 and 342 are arranged. The stop surface 51 rests on the main body 19 or on the axle 17 from. The area is preferred 61 for supporting the stop surface 51 so on the body 19 designed to have a constant radius about the centerline of the platen axis 17 having. It is thereby still a correct position of the compressor unit 320 ensured when the top rollers 4 . 15 , especially the top roller 4 to be reground when worn on their elastic covers.

In an embodiment of the compressor unit 320 can have two guide surfaces 24 and 24 ' for the finished yarn 10 and 10 ' be provided. For holding the guide surfaces 24 . 24 ' is the holder 25 the compressor unit 320 in dashed lines downstream of the compression channels 14 . 14 ' increased. Preferably, the guide surfaces 24 . 24 ' through one in the holder 25 inserted rod 60 be formed. In a non-illustrated embodiment, however, it may also be advantageous, the guide surfaces 24 . 24 ' to arrange on separate wear-resistant components, with the holder 25 get connected. The wear-resistant components with the guide surfaces 24 . 24 ' can also support surfaces for the drafting roller 3 and, for example, analogous to the wear-resistant component 341 be designed and attached.

In an alternative, not shown embodiment, the compressor unit 320 also pivotable in the body 19 of the printing roll unit 18 be arranged. In the area where in 3 the stop surface 51 may be arranged, a cylindrical pin, which serves as a connecting means, the compressor unit 320 at the base body 19 attached. The compressor unit 320 is pivotable about the centerline of the pen. Is the compressor unit 320 attached to a pin, it may be sufficient if the compressor unit 320 only two contact surfaces 331 and 332 having. On the bearing surfaces 333 and 334 in the area of the guide surfaces 23 and 23 ' can then be waived if necessary. Will on the bearing surfaces 333 and 334 omitted, so can the guide surfaces 23 . 23 ' preferably directly through the outer periphery of a slightly elongated rod 56 be formed. The pole 56 For example, made of hardened steel, then forms a on the holder 25 attached wear-resistant component. It may alternatively be advantageous, the compressor unit 320 pivotable on the axle 17 mount.

In the 6 and 7 is a third embodiment of a compressor unit 620 shown. The compressor unit 620 is only a drafting system 1 assigned and contains a compression channel 14 for a finished warped fiber strand 11 , The compressor unit 620 contains a support surface 631 for positioning the compressor unit 620 on the drafting roller 3 located in the area of the compression channel 14 is arranged. The bearing surface 631 is concave and concave on the peripheral surface 13 customized. The compressor unit 620 is designed in several parts and contains a holder 25 and a wear-resistant component 641 that is immovable with the holder 25 connected is. The bearing surface 631 is on the wear-resistant component 641 arranged.

The compressor unit 620 contains another support surface 633 for the drafting roller 3 in the circumferential direction C of the support surface 631 is spaced. The bearing surface 633 can be flat or convex. The bearing surface 633 is preferred on a wear-resistant component 643 arranged. Alternatively, the support surface 633 even without a wear-resistant component 643 directly on the compressor unit 620 be arranged. The attachment of the wear-resistant components 641 and 643 is preferably as it has already been described in relation to the other figures.

To improve the support stability of the compressor unit 620 It may be advantageous to have a third bearing surface 632 provided (dashed lines), which is preferably also arranged on a wear-resistant component. The bearing surfaces 631 . 632 . 633 and the loading element 27 are preferably arranged to each other that the loading element in the view of 7 lies within an imaginary surface, through the imaginary shortest connecting lines between the centers of the bearing surfaces 631 . 632 and 633 is formed.

The compressor unit 620 is only for a single drafting system 1 designed and thus has the advantage that possibly occurring disturbances on the drafting system 1 not on the adjacent drafting system 1' can transfer. However, it is, as in the other embodiments also, a pressure roller assembly 18 for two adjacent drafting systems 1 . 1' intended. In the printing roll unit 18 are two separate compressor units 620 and 620 ' arranged, which are preferably designed mirror-symmetrical to each other. The compressor units 620 and 620 ' are separately movable on the printing roll unit 18 appropriate.

They are means 21 for securing the compressor unit 620 on the printing roll unit 18 provided that a sliding guide 50 , a clip 52 as captive and a helical compression spring 27 as a loading element for generating a bearing force on the support surface 631 . 633 contain.

In an alternative embodiment can also on the slide 50 be waived. The compressor unit 620 can with connecting means 21 ' on the axis 17 of the pressure roll twin 15 hooked and around the axis 17 be swiveling, like in 6 is shown in dashed lines. Instead of a stop surface 51 as part of the sliding guide 50 is a stop surface 51 ' for positioning the compressor unit 620 provided in the circumferential direction C, located on the axis 17 supported. In this case, on the bearing surface 632 be waived, the spring 27 and the captive 52 however, remain as shown.

In an embodiment, the compressor unit 620 a guide surface 23 for the fiber bandage 2 and / or a guide surface 24 for the yarn 10 contain. The guide surfaces 23 and 24 can be designed analogously to the embodiments already described with reference to the other figures. It may also be advantageous to the support surface 633 in the area of the guide surface 23 to arrange, and there a wear-resistant component similar to the wear-resistant component 343 provided.

The wear-resistant component 641 is cantilevered on the compressor unit 620 attached. The means 21 for securing the compressor unit 620 can thereby be in the range between the drafting systems 1 . 1' be arranged where the space is less cramped than between the covers of Druckwalzenzwillinge 4 and 15 on the support surface 631 opposite side of the wear-resistant component 641 ,

In all embodiments, the processing of a single fiber structure has so far been 2 in a drafting system 1 described. However, it is possible in a conventional manner, several fiber composites 2 , in particular two fiber composites, in a drafting system 1 to forgive together. At the nip line 5 are then two spaced apart fiber bundles 11 before, which are finished warped and separated from each other by the compression zone 12 be guided. There are then two compression channels 14 in the compression zone 12 provided the two adjacent fiber composites 11 compacted. The two separately compacted fiber composites 11 will be following the nip line 16 fed to a common twisting element and twisted into a false twist. The number of compression channels 14 and the guide surfaces 23 in the described compressor units 20 can of course be adapted accordingly for such a production of false twist. For the compaction of a finished distorted fiber structure 11 are different forms of compression channels 14 known. The selection of the compression channel 14 and the shape of its baffles 46 is determined by the appropriate application case and the type of fiber structure processed in the drafting system 2 selected.

It should be expressly reiterated that the different means described 21 for securing the compressor unit 20 on the printing roll unit 18 and of course the connection methods of the wear-resistant components can also be combined differently with one another.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• WO 2006/005207 A1 [0003, 0030]
• - CN 2734787 Y [0004]

Claims (59)

Compressor unit for a drawing frame of a textile machine, comprising at least a compression channel for a finished drawn fiber composite, characterized in that the compressor unit ( 20 ) is formed in several parts and a holder ( 25 ) and at least one wear-resistant component ( 41 ; 42 ; 43 ; 44 ) immovable with the holder ( 25 ) connected is. Compressor unit according to claim 1, characterized in that a wear-resistant component ( 341 ; 342 ; 343 ; 344 ) cohesively with the holder ( 25 ) connected is. Compressor unit according to claim 1 or 2, characterized in that a wear-resistant component ( 341 ; 342 ; 343 ; 344 ) by an adhesive with the holder ( 25 ) connected is. Compressor unit according to one of claims 1 or 2, characterized in that a partial area ( 45 ) of a wear-resistant component ( 141 ; 142 ; 143 ) by the material of the holder ( 25 ) is sprayed over. Compressor unit according to claim 1, characterized in that a press connection between the holder ( 25 ) and a wear-resistant component ( 141 ; 142 ; 143 ) is available. Compressor unit according to one of claims 1 to 5, characterized in that a wear-resistant component ( 41 ; 42 ) cantilevered on the holder ( 25 ) of the compressor unit ( 20 ) is arranged. Compressor unit according to one of claims 1 to 6, characterized in that the holder ( 25 ) a recording ( 26 ) for a wear-resistant component ( 41 ; 42 ; 43 ; 44 ) having. Compressor unit according to claim 7, characterized in that the receptacle ( 26 ) by a pin ( 53 ; 55 ) is formed, which from the holder ( 25 ) stands out. Compressor unit according to one of claims 1 to 8, characterized in that the compressor unit ( 20 ) at least two wear-resistant components ( 41 . 43 ) immovable with the holder ( 25 ) are connected. Compressor unit according to claim 9, characterized in that the compressor unit ( 20 ) two wear-resistant components ( 41 . 43 ) each having a contact surface ( 31 . 33 ) for a drafting roller ( 3 ), wherein the wear-resistant components ( 41 . 43 ) so on the holder ( 25 ) are arranged so that the two bearing surfaces ( 31 . 33 ) in the circumferential direction (C) of the drafting roller ( 3 ) are spaced from each other. Compressor unit according to claim 9 or 10, characterized in that a first wear-resistant component ( 341 ) at least one compression channel ( 14 ) for a finished warped fiber structure ( 11 ) and that a second wear-resistant component ( 343 ) at least one guide surface ( 23 ) for a fiber structure ( 2 ) contains. Compressor unit according to one of claims 9 to 11, characterized in that the distance between the bearing surfaces ( 31 . 33 ) of the two wear-resistant components ( 41 . 43 ) in the circumferential direction (C) 7 mm to 22 mm, in particular 7.5 mm to 9.5 mm. Compressor unit according to one of claims 9 to 12, characterized in that the compressor unit ( 320 ) not with the holder ( 25 ) connected stabilizing component ( 57 ), the two wear-resistant components ( 342 . 344 ) connects to each other. Compressor unit according to claim 9, characterized in that the compressor unit ( 120 ; 320 ) two wear-resistant components ( 41 . 42 ) each having a contact surface ( 31 . 32 ) for a drafting roller ( 3 ) and for two adjacent drafting systems ( 1 . 1' ), wherein the wear-resistant components ( 41 . 42 ) so on the holder ( 25 ) are arranged so that the two bearing surfaces ( 31 . 32 ) in the axial direction (D) of the drafting roller ( 3 ) are spaced from each other. Compressor unit according to one of claims 9 to 14, characterized in that the compressor unit ( 20 ) three or four wear-resistant components ( 41 . 42 . 43 . 44 ) each having a contact surface ( 31 . 32 . 33 . 34 ) for a drafting roller ( 3 ) contains. Compressor unit according to claim 14 or 15, characterized in that the compressor unit ( 320 ) a continuous rod ( 54 ; 56 ) located between two adjacent drafting systems ( 1 . 1' ) associated wear-resistant components ( 341 . 342 ) and their ends ( 53 ) in the wear-resistant components ( 341 . 342 protrude). Compressor unit according to claim 16, characterized in that the rod ( 54 ) has a diameter of at least 2 mm or more, in particular 3 mm or more, in at least one region. Compressor unit according to one of claims 1 to 17, characterized in that the compressor unit ( 20 ) at least one stop surface ( 51 ) for positioning the compressor unit ( 20 ) in the circumferential direction (C) of the drafting roller ( 3 ) having. Compressor unit according to one of claims 1 to 18, characterized in that the compressor unit ( 20 ) at least one recording ( 28 ) for a loading element ( 27 ; 29 ; 58 ) for generating a bearing force on the support surfaces ( 31 ; 32 ; 33 ; 34 ) having. Compressor unit according to one of claims 1 to 19, characterized in that the compressor unit ( 20 ) at least one loading element ( 29 ; 58 ) for generating a bearing force on the support surfaces ( 31 ; 32 ; 33 ; 34 ) contains. Compressor unit according to claim 20, characterized in that the loading element is a spring ( 58 ), which is on the holder ( 25 ) is attached. Compressor unit according to claim 20 or 21, characterized in that the loading element is a magnet ( 29 ). Wear-resistant component for immovable mounting in a compressor unit for a drafting system of a textile machine, characterized in that the wear-resistant component ( 41 ; 42 ; 43 ; 44 ) a support surface ( 31 ; 32 ; 33 ; 34 ) for a drafting roller ( 3 ), that the wear-resistant component ( 41 ; 42 ; 43 ; 44 ) a guide surface ( 23 ) for a fiber structure ( 2 ) and / or a compression channel ( 14 ) for a finished warped fiber structure ( 11 ), and that the wear-resistant component ( 41 ; 42 ; 43 ; 44 ) at least one recording ( 45 ) for an element ( 53 ) of the compressor unit ( 20 ) having. Wear-resistant component according to claim 23, characterized in that the wear-resistant component ( 341 ; 342 ; 343 ; 344 ) a recording ( 45 ) for one out of a holder ( 25 ) of the compressor unit ( 320 ) outstanding cones ( 53 ) having. Wear-resistant component according to claim 23 or 24, characterized in that the compression channel ( 14 ) tunnel-shaped and to the bearing surface ( 331 ) is open, with a baffle ( 46 ) of the compression channel ( 14 ) directly to the support surface ( 331 ) adjoins. Wear-resistant component according to one of claims 23 to 25, characterized in that the bearing surface ( 31 ; 32 ; 33 ; 34 ) for the drafting roller ( 3 ) is concaved, the curvature being adapted to the peripheral surface of a cylinder. Wear-resistant component according to claim 26, characterized in that the arc length of the bearing surface ( 31 ; 32 ; 33 ; 34 ) - seen in each section perpendicular to the center line of the concave support surface - smaller than 14 mm, in particular smaller than 8 mm. Wear-resistant component according to one of claims 23 to 27, characterized in that a receptacle through a blind hole ( 45 ) is formed. Wear-resistant component according to claim 28, characterized in that the blind hole ( 45 ) has a diameter of more than 2 mm, in particular of more than 3 mm, at least in one region. Wear-resistant component according to claim 28 or 29, characterized in that a center line of the blind hole ( 45 ) parallel to the center line of the concave support surface ( 331 ) runs. Wear-resistant component according to one of claims 28 to 30, characterized in that the compression channel ( 14 ) in the wear-resistant component ( 341 ) - in a section along the center line of the blind hole ( 45 ) - below the base ( 47 ) of the blind hole ( 45 ) runs. Wear-resistant component according to one of claims 23 to 31, characterized in that the wear-resistant component ( 341 ) two shots ( 45 . 45 ' ) for one out of a holder ( 25 ) of the compressor unit ( 320 ) outstanding cones ( 53 ), so that the wear-resistant component ( 341 ) for both drafting systems ( 1 . 1' ) one over two adjacent drafting systems ( 1 . 1' ) extending compressor unit ( 320 ) can be used. Wear-resistant component according to claim 32, characterized in that the two receptacles ( 45 . 45 ' ) - in particular in a section along the center line of the concave support surface ( 331 ) - on opposite sides of the compression channel ( 14 ) or the guide surface ( 23 ) are located. Platen roller assembly for a drafting system of a textile machine with a compressor unit, a base body and two non-contacting pressure roller twins, which are accommodated in the base body, characterized in that the pressure roller assembly ( 18 ) at least one means ( 21 ) for fastening the compressor unit ( 20 ) on the printing roll unit ( 18 ), wherein the compressor unit ( 20 ) movable on the pressure roller assembly ( 18 ) is attached. Printing roll unit according to claim 34, characterized in that the printing roll unit ( 18 ) a compressor unit ( 20 ) according to one of claims 1 to 22. Printing roll unit according to claim 34 or 35, characterized in that the means ( 21 ) for fastening the compressor unit ( 20 ) on the base body ( 19 ) of the printing roll unit ( 18 ) are attached. Printing roll unit according to one of claims 34 to 36, characterized in that the means ( 21 ) for fastening the compressor unit ( 20 ) on the printing roll unit ( 18 ) a loading element ( 27 ; 58 ) for generating a bearing force on the support surfaces ( 31 ; 32 ; 33 ; 34 ) of the compressor unit ( 20 ) contain. Printing roll unit according to one of claims 34 to 37, characterized in that the compressor unit ( 20 ) via a loading element ( 58 ) for generating a bearing force on the support surfaces ( 331 . 332 . 333 . 334 ) of the compressor unit ( 320 ) movable on the pressure roller assembly ( 18 ) is attached. A printing roll unit according to claim 38, characterized in that the loading element is a spring ( 58 ), which is at the base body ( 19 ) of the printing roll unit ( 18 ) and on the holder ( 25 ) of the compressor unit ( 320 ) is attached. Printing roll unit according to one of claims 34 to 39, characterized in that the compressor unit ( 20 ) via a sliding guide ( 50 ) in the main body ( 19 ) of the printing roll unit ( 18 ) is movable. Printing roll unit according to one of claims 34 to 40, characterized in that the compressor unit ( 20 ) pivotable in the body ( 19 ) of the printing roll unit ( 18 ) is arranged. Printing roll unit according to one of claims 34 to 40, characterized in that the compressor unit ( 20 ) on an axis ( 9 ; 17 ) of a pressure roll twining ( 4 ; 15 ) and about the axis ( 9 ; 17 ) is pivotable. Printing roll unit according to one of claims 34 to 42, characterized in that the pressure roller assembly is a pneumatically acting loading element for generating a bearing force on the bearing surfaces ( 131 . 132 . 133 ) of the compressor unit ( 120 ) contains. Printing roll unit according to one of claims 34 to 43, characterized in that the means ( 21 ) for fastening the compressor unit ( 20 ) a captive ( 52 ) for the compressor unit ( 20 ) contain. Printing roll unit according to claim 44, characterized in that the captive by a clip ( 52 ) is formed. Pressure roller assembly according to claim 44, characterized in that the captive by a loading element ( 58 ) is formed. Printing roll unit according to one of claims 34 to 46, characterized in that the axes ( 9 . 17 ) of the pressure roller twins ( 4 . 15 ) immovable in the basic body ( 19 ) of the printing roll unit ( 18 ) are included. Printing roll unit according to one of claims 34 to 47, characterized in that the basic body ( 19 ) of the printing roll unit ( 18 ) at least one stop surface ( 61 ) for positioning the compressor unit ( 20 ) in the circumferential direction (C) one with the pressure rollers ( 4 . 15 ) can be brought into contact with the drafting roller ( 3 ) having. Method of manufacturing a compressor unit for a drafting system of a textile machine, with at least a compression channel for a finished warped fiber structure, characterized in that at least one wear-resistant Component is immovably connected to a holder. Method according to claim 49, characterized that at least two wear-resistant components to each other be aligned and in the aligned state with a holder be connected, so that the wear-resistant components immovably fixed to the holder. Method according to claim 49 or 50, characterized that the wear-resistant components by placing on a convex and the peripheral surface of a Cylinder adapted surface to be aligned. Process according to claim 51, characterized in that that at least one wear-resistant component is a concave curved support surface for a drafting roller having, wherein the curvature of the support surface adapted to the peripheral surface of a cylinder, so that the bearing surface for the drafting roller the wear-resistant component when placed on the convex Aligned curved surface. Method according to one of claims 49 to 52, characterized in that a wear-resistant component is embedded in the still soft material of the holder. Method according to one of claims 49 to 52, characterized in that a wear-resistant component placed in a mold and partially with the material of the holder is overmoulded. Method according to one of claims 49 to 54, characterized in that a wear-resistant component cohesively connected to the holder. Method according to claim 55, characterized that a wear-resistant component by gluing on the holder is fixed. Method according to claim 56, characterized in that that the holder has a receptacle for a wear-resistant Having component, and that an adhesive in the field of recording is applied, the wear-resistant component on the soft Adhesive is placed and aligned so that the wear-resistant Component in the aligned state by the hardening Adhesive immovably fixed to the holder. Method according to claim 57, characterized that at least two wear-resistant components with adhesive placed on the holder and aligned with each other, so that the wear-resistant components in the aligned state by fixed the curing adhesive immovably on the holder become. Method according to one of claims 49 to 58, characterized in that on the wear-resistant components after fixing on the holder, in particular on its bearing surfaces for a drafting roller, no further post-processing is made.