DE1435598A1 - Method and device for melt spinning of filamentary, ribbon or film-shaped products and these products - Google Patents

Description

Dr. KARL SCHWARZHANS DOnVSif

Dr. ELISABETH JUNG ¹ ^ * -f * - ^ <w * l ^ MUNICH 19, 27, Sep, 1962

PATENTANWÄLTE ROMANPLATZ 10

TEL: 570245 1435598

TELEGRAMS: INVENT MÖNCHEN

H 451 / SA «
NT Qnderzoekingsinstituut Research, Arnhem, (Holland)

Method and device for melt spinning of thread, tape or film-shaped products and these products.

Priority 7 * March 1962 / Biederlande Registration no. 275 670

The invention relates to a method and a Device for melt pinning of thread, tape or film-shaped Products made from a thermoplastic thread-forming Fabric as well as on the thread, tape or film-shaped products manufactured in this way

Processes of this type are known in which the melt is pressed through a mixing zone, a filter zone and a molding device in an advanced stage of the process, but before solidification, then cooled and collected Mixing during melt spinning of the most varied of thermoplastic materials, such as polyamide, polyester, polymethane, etc., products with good homogeneity in terms of composition, dye affinity and tear resistance can be obtained.

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binding: dwtsdi. Bonk A.G .. Branch Munich, Depoiitenkais »Rotkr.uzplaH, Account 750308 - Pojtschedtkonto: MOndi.n 30175

H35598

However, the known methods and devices have who laughed that it was seen from a technical point of view it is undesirable to have a device with a movable mixer. use. Namely, this causes serious Difficulties in sealing the device In addition, it has proven difficult to prevent heat loss through the drive mechanism. 3in another The disadvantage is that a very bulky construction of the door direction is required »

So far it has not been possible to mix the melt sufficiently without using a movable mixer to achieve the advantages mentioned

The present invention relates to a method which it enables a particularly favorable extinguishing effect to be achieved while avoiding the abovementioned inconveniences.

The invention consists essentially in the fact that the melt flow in the mixing zone several times in a manner known per se Way is divided into partial streams by means of stationary guide organs and that after each division the partial streams, while they, offset against each other and possibly deformed and before they will be divided again, partially united, wonaoh all partial flows are finally combined.

A melt spinning device can be used to carry out this process known type, consisting of a melting device, at least one pump, a filter, a molding device and a device for collecting the

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manufactured products, wherein a mixing device is arranged in the line system for the melt behind the (first) pump, which is essentially characterized in that the mixing device is designed in a manner known per se and no moving parts has and that in this between the supply end and the outlet end a combination of guide members is arranged, which form a KanaJ ^ ratem in which, -related to the cross-section, the outlet openings of the channels occupy a different position than their inlet openings.

The type of melt spinning device that is used can be varied within the broadest limits. So it can β · Β · an extruder and a single metering pump on λeisen or several pumps connected in parallel, where the mixer (s) in the line before or after the measuring pump or pumps can be

Particularly favorable results have been achieved with pinning devices with a pinning pan, a pressure pump and a measuring pump, in which, according to the invention, the miso device is installed between these two pumps.

The mixer can be connected to the pump block of the melt spinning device as a separate sense it · This however requires the use of a longer pipe system

3s Is also possible that the mixing device is a part the line for the melt between the two pumps

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takes · This can be done in such a way «that the pump block is cast in one piece together with the guide organ " but this is difficult to do for technical reasons. In addition, the mixer in the fusible line can also be switched off separate IT management bodies are set up

By far the simplest and most powerful design consists according to the invention in that the management organs The combination formed forms an elongated unit that is inserted into a straight piece of the Schiaelzsuführungsleitung is · The combination formed by the guide organs can be achieved by connecting parts formed from flattening to form one linearity can be maintained. Such parts bent from plates are for example in Belgian patent 578 478 described by the applicant "

Preferably, however, a training is used that is obtained in that longitudinal recesses are milled in a rod with a square cross-section, which together the duct walls form the ducts, while the ducts do not Milled away parts of the rod represent the guiding organs. In this way, it is readily possible to design a mixing device known per se so that in the vicinity of the Infeed end 3 -, form in a direction which is in one and the same axial plane, up to that point run side by side and converge in pairs, in which the cross-sections of the four partial kai channels are two diagonally

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cover opposite quadrants of the cable cross-section, and in which each pair of sub-channels crosswise into a pair of sub-channels of the adjacent system of four sub-channels open out «which the latter in pairs in one direction along an axial plane, the bu of the aforementioned Axial plane is perpendicular, diverge until their · cross-sections cover the four quadrants of the line, and that several mixing sections, each of which consists of two times four sub-channels, adjoin one another in the line are arranged in series

Another preferred embodiment of the invention Mixing device is characterized in that the combination of guide members of an elongated member with a square cross-section that fits in a channel of the same cross-section and on each of its Side surfaces has the same wave-like depressions, which have a constant width and depth of preferably 0.4 to 0.45 times the width of the link, and which indentations in the longitudinal direction always between two adjacent side surfaces extend in such a way that in each subsequent side surface the wave of the recess against their previous wave alternately by about 0.7 and about 0.3 Is wavelengths ahead, and that the depressions both begin and begin in different basins of the elongated member also end

The products produced according to the invention have a

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unprecedented homogeneity of composition · This canoe is particularly clear, through the separate feeding of black and white spinning granules to the melt pan of a melt spinning device of those! type are shown for which a melting pan and two pumps are arranged in series

■ If the machine is not equipped with a mixer both black and white material can be used in the spinning products can be clearly differentiated if, on the other hand, a mixing device according to the invention is used, can only be determined with a microscope that the Spun product composed of black and white material is*

In the drawing, the subject of the invention is illustrated schematically using exemplary embodiments. Fig. 1 shows a pump block in longitudinal section, the length ± g · 2a up to and including 2e show different views a combination of leadership sorganen and Fig. 3a and 5b show a longitudinal section and a cross section of a Füllstfüekes, in which the combination of management bodies fits"

Ia Fig »1 is denoted by (1) a cylindrical heating jacket, through which a liquid or gaseous heating medium airculates. In this way, those within the The parts located in the jacket are kept at a temperature which is higher than the melting temperature of the parts to be spun thermoplastic material «

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Aue of a (partially shown) Sohmelzpfanne (2) the melt flows along the conical inner wall (3) into a conical collecting vessel (4-), which from a recess in the essentially cylindrical block (5) is formed

The tone of the deepest part of the stem vessel (4) is the SohoelBe led through the channel (6) of the gear pump (7), which formed in the usual catfish »by the shaft (8) driven and housed in a recess of the block (5) *

The melt passing through the pump is pushed through a partially widened channel (9) and a channel 10 _f which is housed in a second, essentially cylindrical block (11).

The various melting pans and pump blocks are screwed together · The drawing shows only a single screw (12) «which connects the block (5) with the block (11) ·

The melt is fed through the channel (10) to a second gear pump (13), which is driven by the shaft 14, has the same design as the pump (7) and is housed accordingly in block (11). The speeds of pumps (7) and (13) are matched to one another in such a way that an overpressure of several atmospheres is created in channels (9) and (10).

3in channel (15) leads from the pump (13) to an aggregate (16), which is only partially illustrated and filter,

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-B-

includes a manifold and a spinning bed with spinnerets "

In the channel (9) a combination of guide members (20) is positioned (Fig. 2a to 2 "). This combination, which has a substantially square cross-section, fits into a filler piece (17) (Fig. 3a and 3b) _t which has a cylindrical outer surface and in turn fits into the channel (9) * Bas filler piece (1?) consists of two parts (18) and (19) »so that it is easy to manufacture,

2a is a view of the end face of the combination of guide members 20 · This © combination consists in Principle of an elongated member (rod) with a square cross-section and recesses in its side walls «, In Fig, 2a the arrows b, c, d and e indicate the respective direction, In which dl @ side views seen in Figures 2b, 2c, 2d and 2e are c

In Figures 2a to 2e are those places where none Material has been removed, hatched · The shape of the recesses is made by making a zigzag ifut with a constant depth in each of the side walls using a face milling cutter

The course of the recesses is through the wavy lines 21, 22, 23 and 24- indicated.

After insertion into the filler piece (17), the part (20) forms a mixer that has the same mixing effect as the mixer described in Belgian patent 578 4-78.

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Claims (1)

Patent application » 1 · Ttrfaihren sum melt spinning of thread, ribbon or Filajformigen products made of a thermoplastic thread-forming material «« elcher melted and passed through a mixing zone, an iterion and a molding device is pressed " whereupon the squeezed product is finally cooled and collected, characterized in that the melt stream in the mixing zone several times in a manner known per se by means of Fixed management organs is divided into partial flows and that after each division the partial flows, while they are against each other offset and possibly deformed and before it again are divided, are partially combined, after which all partial flows are finally combined 2 · Device for carrying out the method according to claim 1, consisting of a Sehmel direction, at least a pump, a filter, a molding device and a device for collecting the manufactured products, wherein a mixing device is arranged in the line system for the melt downstream of the (first) pump, characterized in that that the mixing device is designed in a manner known per se and has no moving parts and that in this a combination of guide elements is arranged between the feed end and the outlet end • Form in KanaJs / stem, in which, based on the cross-section the outlet openings of the channels assume a different position as their entry openings. 809901/0601 _T, in 3 × device Naeh claim 2 having a melting pan, a pressure pump and a metering pump in that the Misohvorrichtung between these two pumps is installed * 4 ·· Device according to claim 2 or 3 * characterized by ^ e £ ennzeichn © t * that the combination formed by the governing bodies forms an elongated sinusity that divides into a straight piece of the Setosls feed line is inserted « 5. Device according to one of claims 2, 3 or 4, characterized in that the mixing device is designed in a manner known per se in such a way that, in the vicinity of the feed end, guide elements subdivide the line cross-section into four quadrants, which form cross-sections of secondary ducts, -tunkt which branch ducts, to that in a sighting, which is located in one-UBD same axial up, run alongside each other and in pairs, _s converge in which cover two diagonally opposed quadrants of the line cross-section, the cross sections of the four sub-channels and feel the ^ Each pair won subchannels crosswise opens into a pair of cable channels of the adjacent system of four sub-channels, which latter sub-channels diverge in pairs in a direction along an axial plane which is perpendicular to the aforementioned axial plane, until their cross-sections cover the four quadrants of the line, and that several mixing sections , the ^ eder of two al four sub-channels are arranged in the line adjoining each other in series. 809901/0601 H35598 6 · Device according to claim 4 or 5 »characterized« in that the combination of guide organs of one elongated limb with a square cross-section formed 1st « that fits into a channel with the same cross-section and has on each of its side surfaces similarly shaped wave-like depressions, which have a constant width and depth of preferably 0 «4 to 0.45 eel the width of the limb and which indentations in the longitudinal direction always between two adjacent side surfaces on such a catfish run "that in each subsequent side face the" skin of the depression is alternately ahead of its previous wave by about 0-7 and about 0.3 wavelengths, and that the depressions in different corners of the elongated member both begin and end 809901/0601