CN1037748A

CN1037748A - Spinning equipment

Info

Publication number: CN1037748A
Application number: CN89103411A
Authority: CN
Inventors: 海恩茨·施普斯
Original assignee: Barmag AG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 1988-05-19
Filing date: 1989-05-19
Publication date: 1989-12-06
Also published as: KR920001928B1; CN1018190B; KR890017393A

Abstract

In spinning equipment,, pull out with 4500 meters/minute silk speed or than bigger speed then from the chemical fibre Shu Shouxian cooling that spinning head comes out.Then, the chemical fibre Shu Zaici in advancing heats in a heating tube.Heating tube can move on guider and the location along the stroke of silk.Therefore heating tube can be placed to like this, and the offset procedure that makes the chemical fibre bundle takes place under the appropriate temperature in heating tube all the time.

Description

Spinning equipment

The present invention relates to a kind of spinning equipment of heating tube, heating tube is used to heat the chemical fibre bundle.Wherein increase under the situation greater than 4500 meters/minute filum terminale speed and be drawn out, cool off, in the length range of a regulation, in heating tube, heat then from the new spun chemical fibre Shu Zaisi speed of spinning head.

This spinning equipment is undocumented German patent application p3808854.1(Ip-1571) the invention object.

Chemical fibre spinning equipment with this heating tube is used for heating new spun silk.It is relevant in the time of staying of bringing-up section with silk.If the characteristic (as intensity, elongation characteristics, shrinkage character) of the silk that will be adapted to the characteristic (for example constituting silk to be processed is which kind of polymer, total titer of silk, the monofilament titer of each monofilament) of current existing silk and/or make every effort to reach and will change the time of staying time, then when the velocity setting of silk, must transform the length of heating tube.

The situation that also will heat in a thermal treatment zone according to silk and deciding causes directed fully stretching in this region generating but then.The remarkable increase of the speed by chemical fibre bundle/silk can be awared stretching.In order to make a kind of silk of weaving, should make this speed increase to the twice of silk speed at least.Because on the other hand, when silk when pulling out greater than 4500 meters/minute very high speed, the corresponding increase of speed is not to only occur in a bit, but in a length range, the border of this scope can not accurately be determined.

Above-mentioned application provides a kind of technical method, it can be in silk speed one regularly, do not change heating tube and change the time of staying of silk in heating tube, and therefore can be under the situation that heating tube is not done to vertically move, make the heat that infeeds be suitable for a length range of silk, in this scope, under the situation of single-stage spinning one drawing process, produce stretching with the high speed of pulling out.

For this reason, according to above-mentioned application, heater design is become can regulate the effective length that silk is heated.The heating of heating tube can be carried out in the porch of silk.Especially tubular heater can be divided into several length parts, their temperature is independent regulation separately.

In addition, the purpose that the present invention will reach is, by such heating-pipe structure and heater, obtains for the favourable spinning of the characteristic of silk and the technology controlling and process of offset procedure.

The characteristic of claim 1 has illustrated solution, and heating tube is designed to make fast that length range that is increased to the silk stroke of twice at least of silk to be in the entrance region of heating tube.Therefore can reach, after silk stretches, can control temperature, make the state of the silk that is obtained when stretching fix and settle out.Especially therefore can influence the elongation and the shrinkage character of silk.

Move heating tube by stroke, can know best position and technology controlling and process (claim 2) along silk.

Tubular heater is divided into several length parts, and their temperature can independent regulation (claim 3).Therefore can make heated length be adapted to the required time of staying under the situation easily especially in operation and use.The heating ring of arranging vertically around heating tube is set.These heating rings can be regulated separately, and each links to each other with an energy.

Can make a kind of silk by the present invention by the control temperature, it can be under the high-tension situation with optimum structure be wound on the bobbin with having good storage capability and transport capacity, and demonstrate unallowed contraction at Shi Buhui that it is for further processing and be inclined to.

Below by means of the description of drawings embodiments of the invention.Wherein:

Fig. 1 has the spinning equipment of heating tube;

But Fig. 2 has the heating tube of different heated length parts.

Fig. 1 has represented a melt-spinning technology schematic diagram that is used to make complete directed silk.The spinning process of this single-stage comprises the following steps: a kind of suitable polymer, extrudes from nozzle by means of extruder 61, a spray silk pump 62, spinning head 63 and spinneret 64 after for example polyester, polyamide, polypropylene etc. are melted.Specify the spinning process of poly terephthalic acid below.The form of the tow 65 that liquation constitutes with monofilament is come out from the nozzle bore of spinneret 64.Tow moves through supercooling #66 downwards.There, logical cold air (room temperature) on tow makes tow be cooled to the degree that solution solidifies.What and then cool off the #66 back is to make tow pass through a unlimited air section to introduce thread guide 67, and it becomes the combination of monofilaments of tow the silk of a densification.This rhizoid arrives the import of heating tube 68 from thread guide 67.This import is a narrow and small hole, and it is made by pottery, and causes the electrostatic charge of silk.Therefore silk carries out irregular air ring shape motion in heating tube.The entrance region 69 of heating tube 68 and the bottom 70 of heating tube 68 are with conventional heater 23.1 and 23.2 heating.This for example can be a kind of resistive heating device or a box that surrounds heating tube, fills in the box with a kind of heating liquid, a kind of heated air or steam.Control device 72.1 is not shown in the figures with 72.2() be used for independently of one another the value that adjustment with heater becomes to predesignate.The outlet of heating tube 68 also is a narrow hole, makes air ring shape monofilament be reassembled into the silk of one densification by it.The length C of heating tube is preferably between 1.5 to 2.5 meters.The diameter of heating tube can be 20 to 30 millimeters.The heating-up temperature of pipe in entrance region by heater 23.1 heating that is to say to see which kind of polymer between 140 ° to 220 ℃, makes it to be higher than 70 to 150 ℃ of its glass brittle transition temperatures, and polymer extends in this case.By the heating-up temperature of the pipe remainder of heater 23.2 heating in the scope of glass brittle transition temperature.Can be higher than it till 50 ℃.But several length that also heater 23.1 further can be divided into again independent regulation.

After silk leaves heating tube, shift to after-treatment device 73, enter spinning after-treatment device 74 by pump 75.Silk is pulled out by godet roller 76 and 77, because the part that silk is twining godet roller, so can produce necessary wire drawing power.Can establish a jet nozzle between godet roller 76 and 77, especially the jet nozzle of a water supply steam can make silk shrink before being wound up on the bobbin whereby.Thereby can make the winding zone of silk below under than higher tension force, entering, and be wound into a cross winding bobbin 78 with good bobbin structure.

Cross winding bobbin 78 on rotatable axle 79, with etc. the garden circular velocity be driven.A reciprocating apparatus 80 and a conductive filament head 81 above it are used for making silk to move around along the length of cross winding bobbin 78.

Thread guide 67 is fixed on the support 82, and it can move up and down on bar 83, can it be fixed on the position of predesignating with a screw 84.Therefore the air drag that acts on the monofilament can be changed, the tension force of silk can be changed thus.The heating tube 68 of band heater 23 is fixed on the bearing 85, and it can move up and down along bar 83 equally, and utilizes screw 87 to be fixed on the precalculated position.Therefore heating tube is in the length range of a stroke, extends under the tension variation situation of regulation at this scope internal thread.

Godet roller 76 and 77 drawing speeds that caused are between 4500 to 5400 meters/minute.When spinning, solution is drawn into monofilament with lower speed (order of magnitude is 50 meters/minute) from spinneret, till its speed increases to when hardening.According to the present invention, after sclerosis, this speed is at least 1700 meters/minute.Under this speed conditions, on monofilament, acted on a very big air drag.Air drag causes improving constantly the tension force of silk.So surpass the elastic elongation ability of silk and reach yield stress in a certain position of silk.At this moment the speed at this length range silk enlarges markedly.In order to make silk that good textile property be arranged, adjust the heated length of heating tube, make it topped firmly length range, the coefficient that the speed of silk was pressed 1: 2 at least in this scope increases.To this,, in heating tube, at first silk is heated to the glass brittle transition temperature, because the heating-up temperature of entrance region is more much higher than glass brittle transition temperature by temperature control equipment of the present invention.At this entrance region, the increase of above-mentioned silk speed should take place.Distance between heating tube and the spinneret should be done corresponding adjustment, makes high temperature promote the appearance of offset procedure.Owing to be in entrance region generation offset procedure, heating tube also has most can supply further to handle the usefulness of silk.Most of the heating tube length that this is remaining also is used for heating, and it has such temperature, promptly is enough to make silk to maintain basically on its glass brittle transition temperature.Therefore, the heating-up temperature of the pipe here is in the glass brittle transition temperature and is approximately higher than in the scope between 50 ℃ of this temperature.

Therefore, can accomplish to make the whole length range that surpasses yield stress of silk to be heated to a suitable temperature.Important point is to heat before surpassing yield stress, after the surrender rheology finishes, also also has heat to be delivered on the silk.In the position that begins to surrender rheology, the temperature of silk should be 80 to 90 ℃ (glass brittle transition temperatures) at least.Therefore avoid the fracture of monofilament, improved the intensity of silk, reduced toughness.Reduced boiling water shrinkage by the heat transmission after the elongation.

By regulating the distance A+B between heating tube length C, the effective heated length D of heating tube and heating tube and the spinneret, can make the heating best resultsization of heating tube to silk.

Fig. 2 has represented the version by heating tube 1 of the present invention, and wherein, tubular heater is divided into several length parts by 5 heating rings 23.Each two heating ring 23 of upper and lower side are shorter than that middle heating ring 23.All heating rings 23 are fully round heating tube 1.Heating tube 1 is established a seal wire pin hole 37 at the entrance region of top silk.In addition, heating tube is at the outside flanging 36 of the outlet area of silk.Therefore, pipe 1 increases at the external diameter of outlet area, and is identical along the diameter of whole axial length in addition.The heating ring 23 that pushes by heating tube from top at this part upper support that has enlarged, heating ring is surrounded by a kind of heat-insulating material 28.Heat-insulating material 28 is arranged between each section too.Because heater types to change by the present invention effective heated length play a part certain, so represented to adopt the example of different heating system on the figure.Two top heating rings 23 are heated by resistive device work.Each heating ring 23 is connected with a power supply 24, and power supply is handled by potentiometer.Uppermost those heating ring 23 the most handy dc sources 24 are worked, and those heating ring 23 usefulness AC powers below it are come work.Middle heating ring 23 is the same with the heating ring 23 of two bottoms, by fluid heating system supply heating heat.Each of these three heating rings 23 is connected with a public return loop sections 26 with a public inlet loop sections 25, and they are parts of a heat cycles, and this is not expression in detail on figure.In each inlet loop sections 25, a block plug 27 is arranged respectively, can regulate the focal length of tubular heater independently by it.

The number of bringing-up section can be selected arbitrarily, represented just example in the embodiments of the invention.

Claims

1, the spinning equipment of chemical fibre bundle, wherein, increase under the situation greater than 4500 meters/minute filum terminale speed from the new spun chemical fibre Shu Zaisi speed of spinning head and to be drawn out, to cool off, heat in heating tube in the length range of a regulation then, it is characterized by: heating tube is designed to make fast that length range that is increased to the silk stroke of twice at least of silk to be in the entrance region of heating tube.

2, according to the described spinning equipment of claim 1, it is characterized by: heating tube can move along the stroke of silk and locate.

3, according to claim 1 or 2 described spinning equipments, it is characterized by: the heating tube inlet region is heated to and makes its temperature be higher than 70 to 150 ℃ of glass brittle transition temperatures, all the other most of pipe ranges are heated to the glass brittle transition temperature that is not less than silk, preferably are heated to above till the glass brittle transition temperature to 50 ℃.

4, according to the described spinning equipment of one of aforementioned all claims, it is characterized by: when the position in the silk stroke is predesignated, the effective heated length of heating tube can change, make effective heated length be stretched over a length range of a stroke, in this scope, make a speed be increased to twice at least.