Abstract: The invention relates to a process for melt-spinning, drawing and winding multiple synthetic threads and to an apparatus for performing the process. The synthetic threads are spun concurrently side by side through extrusion of fine filamentous strands, cooled down and hauled off to be then collectively drawn as a sheet of threads and wound up on bobbins. To obtain ideally identical physical properties in the collective treatment of the threads, the threads are hauled off independently of each other by separate individual godets after extrusion and before collective drawing. This makes it possible to realize for each thread the same conditions during extrusion, cooling and hauling off. The apparatus includes multiple individual godets arranged side by side, which are arranged upstream of the drawing facility and are each associated with one of the threads. To pull off the threads, the individual godets are configured to be individually driveable.

Abstract: The invention relates to a method and a device for producing a crimped composite thread, wherein the inventive method consists in extruding, cooling and in drawing several yarns in the form of a plurality of strand filaments and in jointly crimping them in order to obtain a crimped composite thread. The aim of said invention is to make it possible to pre-treat the threads in a manner adaptable to each treatment step. The aim is attained by that at least one multi-treaded yarn is whirl-tangled many times during several operations prior to crimping. For this purpose, a whirl-tangling device provided with a plurality of whirl-tangling units following each other in a direction of the yarn displacement is used.

Abstract: A device for producing intertwining knots in a multifilament thread has a rotating nozzle ring with an encircling guide groove on an outer casing and an encircling sealing surface on an inner casing. At least one nozzle bore opens radially into the guide groove and passes through the nozzle ring. The nozzle ring is guided on a stator that has an encircling sliding surface on its periphery for guiding the nozzle ring and that forms a pressure chamber having a chamber opening that opens into the sliding surface. The sealing surface of the nozzle ring interacts with the sliding surface of the stator in order to provide air sealing. The nozzle ring is formed in a pot-like manner with an end wall having a disc-like end sealing surface which interacts with an end sliding surface formed on an end side of the stator to provide air sealing.

Abstract: A device is described for producing a fiber product by laying down melt-spun fibers onto a laydown belt. A spinning device is associated with a top side of the laydown belt and a suction-extraction device is associated with the bottom side. A vacuum device has a movable suction chamber which interacts with the spinning device in order to lay down the fibers on the laydown belt. To generate a uniform suction flow in every position of the suction chamber, the suction chamber is formed from a stationary bottom box and a movable top box which are coupled to one another in a pressure-tight manner.

Abstract: The exemplary embodiment illustrated in FIGS. 1 to 3 of the device according to the invention is by way of example with respect to the structure and arrangement of the individual assemblies. In principle, it is also possible for the godet assigned to the texturing unit 3 to guide the threads only with a single partial looping. The invention is thus particularly suitable for producing a uniform crimp on each tread in a thread group of a plurality of threads. The number of threads within the thread group is shown by way of example with three threads. The tread group can contain two or more threads. The invention is particularly advantageous in the use of what are known as twist texturing nozzles, in which a twist is produced on the incoming thread. By avoiding friction points and deflections, and identical effect of the twist can be obtained on each of the supplied threads.

Abstract: A device for winding up a thread is described. The device has at least one spool spindle that can be driven and includes a spool housing with a thread catching device associated with the spool housing. The spool spindle is associated with a changing device for guiding the thread back and forth and an auxiliary device for guiding the thread when catching and laying down the thread. The auxiliary device includes at least one moveable metal guide having a guide edge or a guide groove for guiding the thread, such that the moveable guide can be guided between a transfer position in the area of the changing device and a parking position to the side next to the changing device. A stationary pin thread guide may be associated with the moveable guide in the parking position.

Abstract: A device for producing interlaced knots in a multifilament thread is described. The device includes a rotating nozzle ring having a circumferential guide groove and a plurality of nozzle bores opening radially into the base of the guide groove. A stationary pressure chamber, having a chamber opening and an air connection, is associated with the nozzle ring, wherein by rotation of the nozzle ring the nozzle bores can be connected in turn to the chamber opening of the pressure chamber. To permit an intensive air treatment of the thread, the dimension of the chamber opening in the pressure chamber and the spacing of adjacent nozzle bores on the nozzle ring are designed such that as the nozzle ring rotates a plurality of nozzle bores are simultaneously connected to the chamber opening.

Abstract: The invention relates to a method and apparatus for fibrillating synthetic ribbons in an extrusion process for the production of, for example, grass fibers. The extrusion process creates a sheet of ribbons from an extruded foil or a multiplicity of extruded monofils, and stretches them conjointly. The ribbons are led side by side in a parallel arrangement along the circumference of a fibrillating roll with a partial wrap. To produce a pattern of fibrillation irrespective of the thickness of the ribbons and the elasticity of the ribbons, the invention provides that a multiplicity of short partial cuts is made in the ribbons by a plurality of successively engaging rows of blades on the fibrillating roll each having a multiplicity of projecting cutting tips.

Abstract: The invention relates to a gear wheel pump with two meshing gear wheels which are rotatably mounted within a pump housing by means of a driven driveshaft and a crankshaft journal and which form a pumping channel system between a pump inlet and a pump outlet. Several gaps are formed between the pump housing, the gear wheels, the driveshaft, and the crankshaft journal. One of the gaps between the driveshaft and one of the gear wheels contains means for the rotationally fixed connection of the driveshaft to the gear wheel. In order to prevent leakages penetrating to the connecting means, according to the invention the gap between the driveshaft and the gear wheel is sealed, with respect to the front faces of the gear wheel, by means of a sealant.

Abstract: An apparatus and a method for guiding and depositing synthetic fibers to form a nonwoven web is described. The apparatus has a drawing device, a deposit belt, and a plurality of guidance means disposed between the drawing device and the deposit belt, which form in pairs numerous merging guidance pathways for the guidance of a fiber curtain formed by the fibers. The guidance means have numerous air intake slits beneath the drawing device, which enable an introduction of a secondary airstream. Numerous air conducting elements disposed on one of the guidance means are associated with at least one of the air intake slits. In this manner at least one of the sub-streams of the secondary airstream laterally adjacent to the fiber curtain can be introduced to the fiber stream at an inflow angle that is at a right angle to the deposit belt.

Abstract: The invention relates to a method and to a device for producing strand-shaped goods in the form of small bands, fiber strands, monofilaments, or films, which are extruded from a polymer melt. After cooling in a cooling bath, a thermal treatment occurs between rolling feed units, wherein the goods are brought into contact with a hot medium. In order to be able to perform an individual thermal treatment depending on the thermoplastic material, the hot medium is provided optionally in the form of hot air or hot water according to the invention. For this purpose, the heating apparatus is formed from a forced-air oven and a water bath apparatus, which can be optionally activated to thermally treat the goods.

Abstract: A bobbin winding machine with a plurality of winding stations which are arranged along a bobbin winding spindle for winding a plurality of threads into bobbins is described. The winding stations are assigned a traversing device which has a flyer traversing unit for each winding station. The flyer traversing units are driven jointly and for this purpose have in each case a drive wheel which is coupled to a driven driving wheel via a toothed belt. The toothed belt is coupled to the toothed drive wheels and to the toothed driving wheel via a toothed profile side.

Abstract: A crimping apparatus for crimping a filament bundle in a melt spinning process includes a conveyor nozzle and a stuffer box which is associated with the conveyor nozzle. For thermal processing, a processing unit, which includes a rotatable processing drum which, for guiding and temperature control of a thread plug, has a rotating drum wall, is disposed downstream of the stuffer box. In order to be able to carry out as gentle a processing of the thread plug as possible, the stuffer box is disposed axially parallel to the processing drum in such a manner that the thread plug can be infed in a straight run from a plug outlet of the stuffer box to the circumference of the drum wall. This allows the naturally acting weight force of the thread plug to be advantageously used for guiding the thread plug.

Abstract: Techniques are directed to godet unit for guiding a multifilament thread, including a driven godet of an auxiliary roller or a second godet, from which the thread can be guided with multiple loopings, and including a mingling device for air-mingling the thread. The godet and the mingling device are provided in the form of a combined assembly.

Abstract: A spinneret bundle for producing fibers from a polymer melt includes an elongated nozzle plate that has a feed channel on an upper face and at least one row of nozzle bores that are arranged next to one another on a lower face. A distributing plate lies on the upper face of the nozzle plate and has a distributing chamber that faces the feed channel and a melt inlet that is connected to the distributing chamber. A perforated plate with a plurality of through-bores is provided between the distributing chamber of the distributing plate and the feed channel of the nozzle plate in order to achieve a redistribution and uniformity of the melt when the melt is introduced into the feed channel.

Abstract: The invention relates to a method and a device for removing and drawing a synthetic thread to form a fully drawn yarn. The thread is formed by joining a plurality of extruded filaments and is guided by contact on the circumference of heated guide jackets of several driven galette pairs. In order to obtain a gentle and highly homogenized treatment of the filaments, the thread is guided in an S-shaped or Z-shaped thread course by a first galette pair having two guide jackets driven in opposite directions during the removal from a spinning zone and before the drawing. Thus, both sides of the thread can be brought directly into circumferential contact with the guide jackets for in order to heat the thread.

Abstract: A method and a device for crimping a multifilament thread are described. The thread is blown by means of a transport nozzle through a compressed air stream guided in a thread channel into a gas-permeable compression chamber. Inside the compression chamber, the thread is compressed to form a thread plug, which is then continuously removed through an outlet of the compression chamber. The compression and the removal of the thread plug are monitored by measuring the pressure of the compressed air stream. According to the invention, a plurality of pressures of the compressed air stream in the compression chamber are measured at a plurality of measurement points distributed over the length of the compression chamber for monitoring the thread plug formation in order to perform the compressing and cooling of the thread plug with a uniform filling of the compression chamber.

Abstract: The invention relates to a method and an apparatus for producing a turf yarn for artificial turf. According to the invention, several monofilaments or ribbons are produced from one respective polymer material in two parallel extrusion processes, the turf yarn being formed by combining several monofilaments or ribbons obtained in the first extrusion process with several monofilaments or ribbons obtained in the second extrusion process. In order to improve especially the elasticity of an artificial turf carpet made from said turf yarn, the monofilaments or ribbons obtained in one of the extrusion processes are crimped before being combined, the crimped monofilaments or ribbons and the flat monofilaments or ribbons being produced in parallel next to each other and being joined in a winding station by means of a tie thread.

Abstract: Techniques produce intertwining knots in a multifilament thread. In such techniques, an air stream pulse is generated by a nozzle channel opening into a treatment channel periodically with an interval between successive air stream pulses. During an interval, the air stream pulse is directed transversely onto the thread guided in the treatment channel so that a continuous sequence of intertwining knots is produced in the running thread. An auxiliary air stream is generated continuously or discontinuously and the auxiliary air stream and the air stream pulse are blown in together into the treatment channel.

Abstract: A device for dry-forming a fibrous web, in which a plurality of fibers or fiber mixtures is supplied to a forming head by means of an air flow, is described. The forming head includes a forming outlet arranged above a gas-permeable deposit belt. The fibers deposited on the deposit belt within a forming zone are continuously conveyed out of the forming zone by the deposit belt. A clearance of the forming zone formed between the forming head and the deposit belt is shielded with respect to the surroundings by several sealing means. To obtain as uniform a composition of the fiber layer as possible when depositing the fibers, the sealing means arranged on a feed side forms an inlet opening having an adjustable inflow cross-section through which a defined secondary air flow flows from the surroundings into the clearance.