CS248930B1 - Apparatus for spinning viscous liquids and heat treating chemical fibers - Google Patents

Abstract

The spinning device for spinning viscous liquids and heat treatment of chemical fibers under the spinning nozzle solves the optimization and increase of cooling efficiency, increase of production capacity, improvement of spinning safety and improvement of working environment. The device consists of a spinning block with a spinning nozzle and a cooling shaft located below it, the pressure chamber of which is provided with at least one partition opening into a blowing slot for air supply to the surface of the spinning nozzle. Opposite the blowing slot is located an exhaust channel. The cooling shaft is composed of several vertical cooling zones in combination with a blowing slot for intensive cooling under the spinning nozzle.

Description

248930: 2

Invention; relates to a device for spinning viscous liquids and to heat treatment of chemical fibers under a spinneret.

Increased cooling intensity is required in the production of higher fiber fineness. By using a coolant coolant, it is considerably hampered to increase the cooling performance of the device by increasing the amount of cooling air supplied, since turbulence occurs in the shaft of the coolant, resulting in reduced security in the cooling chamber. spinning continuity.

With the demand for considerable intensive cooling performance of the chemical fibers under the spinneret, a cooling shaft with a transverse cooling principle is preferred, i.e., the cooling air is blown perpendicularly to the course of the fibers which are guided from the spinneret to the extractor machine, usually downwardly.

By increasing the cooling intensity by increasing the amount of cooling air supplied over the entire height of the blowing cross section, the fibers are substantially deflected or blown as well as the individual fibrils are vibrated, which also reduces the certainty in the spinning continuity.

In spinning viscous liquids, especially. synthetic polymers such as polypropylene due to the presence of various additives such as color pigments, additives, stabilizers and the like, gaseous effluents and exhalants that can condense and drip, thus cleaning the interior of the cooling and protective shaft and the winding machine.

The dripping of the condensate of the exhalations reduces the certainty of the continuity of the spinning process and requires the cleaning of the device with organic solvents.

The problem with the gaseous effluent drift under the spinneret as well as the condensation-exhalation dripping is extremely serious when the spinning nozzle is embedded in the nozzle block flange as well as the deep embedding of the nozzle assembly into the lower spinning block cover. The hot gasses rise upward to the spinneret to condense and fluff, or burn to the nozzle, which requires frequent scraping and silicone. of the extruded j-shaped surface of the spinneret.

The spinning of some synthetic polymers requires the immediate start of the cooling of the fibers under the spinneret. This requirement is important in the spinning of profiled fibers because, at a later start of intensive cooling, undesirable changes in the shape of the profiled fiber cross-section occur. The DD 123 955 melt fiber cooling shaft is provided above the intake baffles that distribute and direct the air flow to the perforated shaft wall. The slats are unsuitable for forming turbulence, thereby increasing the increased pressure loss and not reliably controlling the amount of air or cooling intensity. in the individual sections between the guide rails.

The airflow cooling synthetic fiber apparatus of SU 679 656 includes a L-lamella pressure chamber to direct the air flow from the inlet chamber to the resistive element through which the pressure chamber and the blow chamber are connected. The device requires the intensive cooling under the spinneret.

The spinning shaft according to PL 54788 is provided with vertical strips in which the fibers undergo transverse blowing of different intensities in the individual vertical bands. The amount of air in the individual bands cannot be reliably controlled, the baffles are not extended to the control elements. The increase in blowing intensity and air direction through the spinneret is not contemplated by the invention. 3 248930

DE 2923 700 contains a pressure chamber dividing several pressure channels which extend into respective vertical cooling zones. The method of controlling the amount of air by deflecting the baffles allows only small variations in the cooling rate in the individual cooling zones. The cooling shaft does not meet the requirements for intensive cooling and its optimization under the spinneret.

The cooling apparatus of JP 2077-228 / 77 considers slotted blowing under the nozzle in combination with coherent cooling of the fibers. The co-cooling does not provide the possibility of increasing the blowing intensity for the fibers of the finer fines, optimizing the start of the cooling by the spinneret or not considering the invention. All the above mentioned problems are almost eliminated by the solution according to. of the present invention while providing excellent confidence in spinning continuity.

SUMMARY OF THE INVENTION The present invention relates to a device for spinning viscous liquids and to a heat treatment of chemical fibers, which allows the cooling under the spinneret to be optimized, to increase spinning performance and to improve the fiber quality. Most preferably, the spinneret is disposed such that its lower outlet surface is in the same incandescent chamber with a sloping cover of the spinning block.

The cooling shaft is located below the spinning block and is sealed to the bottom spinning block cover. The cooling shaft has a pressure chamber provided with at least one partition that extends into the blowing slot oriented toward the spinneret. The supplied air blowing slot serves to intensively cool the fibers under the spinneret.

An aspiration channel is located opposite the blowing slot. The inlet cross sections of the pressure chamber supply air to the individual vertical zones of the cooling shaft are provided with control elements. The outlet of the blowing slot is provided with adjustable stopper flaps which can be conveniently shaped.

By adjusting the position of the baffle flaps, it is possible to optimize the start of the cooling of the fibers beneath the spinneret. At the request of a later commencement of cooling, such as in the spinning of polyester fibers, the negative angle of the baffle dampers can be set at the desired distance from the spinneret.

The slitting flaps can form a solid or sliding rectifier. In order to increase the cooling intensity under the spinneret, a high moisture content air inlet may result in the cooling shaft slot. If the technology requires a protective atmosphere, an inert gas may be introduced into the slot.

The invention allows for an increase in the spinning block performance, since cooling of the coarser fines of the fibers with a higher one titre is controlled. Intensively cooling the fibers through the slit-blowing filament under the spinneret allows for increased intensity and optimization of cooling to ensure certainty in spinning continuity. At the same time, unwanted gasses of gaseous exhales are suppressed and condensate formation of exhalates and its dripping is almost eliminated. The spinning performance is improved, the workload of scraping and silicating spinnerets is reduced. The cleanliness and maintenance of the machinery in the spinning line is improved and the health and work environment is substantially improved for operators.

The spinning and heat treatment apparatus of the fibers under the spinneret of the present invention offers further possibilities for improving the quality of the fibers produced, improving the process of drawing as well as further processing the chemical fibers.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a spinning and thermal apparatus according to the invention, comprising a spinning block, a cooling shaft of a suction duct. Fig. 2 is a detail of a slot guide extension.

Claims (5)

The device according to the invention, shown in vertical section in FIG. 1, consists of a spinning block 100 and a cooling shaft 200 placed thereon and a suction channel 300. In the spinning unit 100, the nozzle assembly is arranged so that the bottom surface of the spinneret 110 is in line with the bottom insulating cover 115 of the spin block 100. The cooling shaft 200 is sealed to the bottom cover 115 of the spin block 100. The cooling shaft 200 is provided in its pressure chamber 220 with at least one partition 230 that opens to a slot 250 oriented toward the spinneret 110 for intensely cooling the chemical fibers. An aspiration channel 300 is disposed opposite the slot 250. The amount of air is equal vertical bands 221, 222, 223 of the bore of the cooling shaft 200 as well as the blasting gap 250 controlled by the regulating elements 240. The groove 250 is provided with adjustable blackening flaps 261, 262, or a baffle 270, which is shown in Figure 2. A water vapor supply and / or an aerosol dispense into the pressure chamber 220 upstream of the slot 250 to increase the cooling effect under the spinneret 110. The baffle 230 may be extended through the inlet chamber 210 to inert gas sources, if applicable, that spinning technology requires it. A device for spinning viscous liquids and thermally adjusting chemical fibers fulfills the preconditions for increasing the intensity and optimizing the blowing of the chemical fibers under the spinneret (110), which is part of the nozzle block (100). The cooling shaft (200) is located below the nozzle block (100). Sealing the cooling tube (200) to the lower insulating cover (115) eliminates the effects of the environment and thereby ensures standard cooling conditions of the fibers under the nozzle (110). The fiber passing through the cooling vessel (200) is subjected to cooling of the desired desired intensity in the individual vertical bands (221) (222) (223). The dominant cooling element is achieved by means of a blow-through slot (250), opposite to which a suction channel (300) is disposed. The air-conditioned air through the upper pressure duct (220a) into the air outlet (250) is directed by means of adjustable dampers (261) (262). The device is functionally dispensed by spinning polypropylene fibers. BEFORE THE MET Apparatus for spinning viscous liquids and thermally treating chemical fibers of a spinneret nozzle which is part of a nozzle block under which a cooling shaft is disposed, wherein its pressure chamber is provided with at least one partition separating the pressure chamber into at least two pressure channels characterized in that the upper pressure channel (220a) results in a blowing slot (250) oriented towards the spinneret (110). 2. A device for spinning viscous liquids and thermally treating chemical fibers according to claim 1, characterized in that the discharge surface of the spinneret (110) is in the same level of the bottom insulating cover (115) of the spinning block (100), Apparatus for spinning viscous liquids and thermally treating chemical fibers according to claim 1 or 2, characterized in that a suction channel (300) is disposed opposite the blowing slot (250). 4. A device for spinning viscous liquids and thermally treating chemical fibers according to clauses 1, 2 or 3, characterized in that the blow-out gap (250) is provided with a directional! with flaps (261, 262), or with a baffle (270). 5 248930 Apparatus for spinning viscous liquids and for heat treating chemical fibers according to clauses 1, 2, 3 or 4, characterized in that an inlet (290) of inert gas or air with high content is introduced into the blowing slot (250) of the cooling shaft (200) humidity. 2 drawings